/*!
 * EXTREME TDD Transpiler Tests - ACTOR-006/007 (Code Generation)
 *
 * CRITICAL: ALL transpiler tests MUST be written FIRST before ANY code generation implementation.
 * These tests define EXACT Rust code generation requirements for actor system with complete coverage.
 *
 * Following Toyota Way: Build quality in from the start.
 * Following EXTREME TDD: 100% transpiler coverage before any codegen exists.
 *
 * Complexity Budget: Each test function ≤5 cyclomatic, ≤8 cognitive
 * Coverage Target: 100% transpiler rule coverage + 100% edge cases
 * Test Ratio: 3:1 test-to-implementation ratio
 */

use ruchy::backend::codegen::{
    ActorImplementation, FunctionDeclaration, GeneratedCode, ImportDeclaration, ModuleStructure,
    SupervisorImplementation, TypeDeclaration,
};
use ruchy::backend::transpiler::{
    ActorCodeGenerator, AsyncRuntimeGenerator, RustCodeGenerator, SupervisorCodeGenerator,
    TokioIntegration, TranspileError, TranspileErrorKind, TranspileResult, Transpiler,
};
use ruchy::frontend::ast::{ActorDef, Hook, ReceiveBlock, SendExpr, SpawnExpr, SupervisorDef};
use ruchy::middleend::types::{ActorType, MessageType, SupervisorType, Type};

#[cfg(test)]
mod actor_transpiler_tests {
    use super::*;
    use proptest::prelude::*;
    use std::collections::HashMap;

    /// Test infrastructure for transpiler validation
    struct TranspilerTestContext {
        transpiler: Transpiler,
        rust_generator: RustCodeGenerator,
        actor_generator: ActorCodeGenerator,
        supervisor_generator: SupervisorCodeGenerator,
        tokio_integration: TokioIntegration,
        generated_modules: HashMap<String, GeneratedCode>,
    }

    impl TranspilerTestContext {
        fn new() -> Self {
            Self {
                transpiler: Transpiler::new(),
                rust_generator: RustCodeGenerator::new(),
                actor_generator: ActorCodeGenerator::new(),
                supervisor_generator: SupervisorCodeGenerator::new(),
                tokio_integration: TokioIntegration::new(),
                generated_modules: HashMap::new(),
            }
        }

        fn transpile_actor(&mut self, actor_def: &ActorDef) -> TranspileResult<GeneratedCode> {
            self.transpiler.transpile_actor_to_rust(actor_def)
        }

        fn transpile_supervisor(
            &mut self,
            supervisor_def: &SupervisorDef,
        ) -> TranspileResult<GeneratedCode> {
            self.transpiler.transpile_supervisor_to_rust(supervisor_def)
        }

        fn generate_tokio_runtime(
            &mut self,
            actors: &[&ActorDef],
        ) -> TranspileResult<GeneratedCode> {
            self.tokio_integration.generate_runtime_setup(actors)
        }

        fn expect_transpile_success(
            &mut self,
            result: TranspileResult<GeneratedCode>,
        ) -> GeneratedCode {
            match result {
                Ok(code) => code,
                Err(error) => panic!("Expected transpile success, got error: {:?}", error),
            }
        }

        fn expect_transpile_error(
            &mut self,
            result: TranspileResult<GeneratedCode>,
        ) -> TranspileError {
            match result {
                Ok(_) => panic!("Expected transpile error, but transpilation succeeded"),
                Err(error) => error,
            }
        }

        fn verify_generated_rust_compiles(&self, code: &GeneratedCode) -> bool {
            // Would use syn to parse and validate generated Rust code
            !code.content.is_empty() && code.content.contains("struct")
                || code.content.contains("impl")
        }
    }

    // =================================================================
    // ACTOR TRANSPILATION TESTS (Ruchy Actor -> Rust Struct + Tokio)
    // =================================================================

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_basic_actor_to_rust() {
        let mut ctx = TranspilerTestContext::new();

        let actor_def = ActorDef {
            name: "ChatAgent".to_string(),
            type_params: vec![],
            state_params: vec![StateParam {
                name: "message_count".to_string(),
                param_type: Type::Int32,
                default_value: Some(Expression::IntLiteral(0)),
                mutability: Mutability::Mutable,
                span: Span::new(0, 13),
            }],
            body: vec![],
            span: Span::new(0, 30),
            visibility: Visibility::Public,
            attributes: vec![],
        };

        let generated = ctx.expect_transpile_success(ctx.transpile_actor(&actor_def));

        // Verify generated Rust structure
        assert!(generated.content.contains("pub struct ChatAgent"));
        assert!(generated.content.contains("message_count: i32"));
        assert!(generated.content.contains("impl ChatAgent"));
        assert!(generated
            .content
            .contains("pub fn new(message_count: i32) -> Self"));

        // Verify Tokio integration
        assert!(generated.content.contains("tokio::spawn"));
        assert!(generated.content.contains("async fn run("));
        assert!(generated.content.contains("tokio::sync::mpsc"));

        // Verify imports are correct
        assert!(generated
            .imports
            .contains(&ImportDeclaration::new("tokio", vec!["spawn"])));
        assert!(generated
            .imports
            .contains(&ImportDeclaration::new("tokio::sync", vec!["mpsc"])));

        // Verify code compiles
        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_actor_with_generic_parameters() {
        let mut ctx = TranspilerTestContext::new();

        let actor_def = ActorDef {
            name: "GenericActor".to_string(),
            type_params: vec![TypeParam {
                name: "T".to_string(),
                bounds: vec![TypeBound::Send, TypeBound::Sync, TypeBound::Clone],
                default_type: None,
                span: Span::new(0, 1),
            }],
            state_params: vec![StateParam {
                name: "data".to_string(),
                param_type: Type::TypeVar(TypeVar::new(0)), // T
                default_value: None,
                mutability: Mutability::Immutable,
                span: Span::new(0, 4),
            }],
            body: vec![],
            span: Span::new(0, 40),
            visibility: Visibility::Public,
            attributes: vec![],
        };

        let generated = ctx.expect_transpile_success(ctx.transpile_actor(&actor_def));

        // Verify generic Rust structure
        assert!(generated.content.contains("pub struct GenericActor<T>"));
        assert!(generated.content.contains("where T: Send + Sync + Clone"));
        assert!(generated.content.contains("data: T"));

        // Verify generic implementation
        assert!(generated.content.contains("impl<T> GenericActor<T>"));
        assert!(generated.content.contains("where T: Send + Sync + Clone"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_actor_state_initialization() {
        let mut ctx = TranspilerTestContext::new();

        let actor_def = ActorDef {
            name: "Counter".to_string(),
            type_params: vec![],
            state_params: vec![
                StateParam {
                    name: "count".to_string(),
                    param_type: Type::Int32,
                    default_value: Some(Expression::IntLiteral(0)),
                    mutability: Mutability::Mutable,
                    span: Span::new(0, 5),
                },
                StateParam {
                    name: "name".to_string(),
                    param_type: Type::String,
                    default_value: Some(Expression::StringLiteral {
                        value: "default".to_string(),
                        span: Span::new(0, 9),
                    }),
                    mutability: Mutability::Immutable,
                    span: Span::new(0, 4),
                },
            ],
            body: vec![],
            span: Span::new(0, 50),
            visibility: Visibility::Public,
            attributes: vec![],
        };

        let generated = ctx.expect_transpile_success(ctx.transpile_actor(&actor_def));

        // Verify struct with proper field types
        assert!(generated.content.contains("count: i32"));
        assert!(generated.content.contains("name: String"));

        // Verify constructor with defaults
        assert!(generated.content.contains("pub fn new() -> Self"));
        assert!(generated.content.contains("count: 0"));
        assert!(generated.content.contains(r#"name: "default".to_string()"#));

        // Verify constructor with custom values
        assert!(generated
            .content
            .contains("pub fn with_params(count: i32, name: String) -> Self"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    // =================================================================
    // RECEIVE BLOCK TRANSPILATION TESTS (Message Handling)
    // =================================================================

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_receive_block_to_tokio_select() {
        let mut ctx = TranspilerTestContext::new();

        let receive_block = ReceiveBlock {
            arms: vec![ReceiveArm {
                pattern: Pattern::Identifier {
                    name: "Increment".to_string(),
                    span: Span::new(0, 9),
                },
                guard: None,
                body: Expression::Assignment {
                    target: Box::new(Expression::FieldAccess {
                        object: Box::new(Expression::Identifier {
                            name: "self".to_string(),
                            span: Span::new(0, 4),
                        }),
                        field: "count".to_string(),
                        span: Span::new(0, 10),
                    }),
                    value: Box::new(Expression::BinaryOp {
                        op: BinaryOperator::Add,
                        left: Box::new(Expression::FieldAccess {
                            object: Box::new(Expression::Identifier {
                                name: "self".to_string(),
                                span: Span::new(0, 4),
                            }),
                            field: "count".to_string(),
                            span: Span::new(0, 10),
                        }),
                        right: Box::new(Expression::IntLiteral(1)),
                        span: Span::new(0, 15),
                    }),
                    span: Span::new(0, 20),
                },
                span: Span::new(0, 25),
            }],
            is_exhaustive: false,
            timeout: None,
            span: Span::new(0, 30),
        };

        let generated = ctx
            .expect_transpile_success(ctx.rust_generator.transpile_receive_block(&receive_block));

        // Verify tokio::select! usage
        assert!(generated.content.contains("tokio::select!"));
        assert!(generated.content.contains("msg = receiver.recv() =>"));

        // Verify pattern matching
        assert!(generated.content.contains("match msg"));
        assert!(generated.content.contains("Message::Increment =>"));

        // Verify body translation
        assert!(generated.content.contains("self.count += 1"));

        // Verify proper async structure
        assert!(generated.content.contains("async fn handle_messages"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_receive_with_pattern_destructuring() {
        let mut ctx = TranspilerTestContext::new();

        let receive_block = ReceiveBlock {
            arms: vec![ReceiveArm {
                pattern: Pattern::FunctionCall {
                    name: "SendMessage".to_string(),
                    args: vec![
                        Pattern::Identifier {
                            name: "content".to_string(),
                            span: Span::new(0, 7),
                        },
                        Pattern::Identifier {
                            name: "sender".to_string(),
                            span: Span::new(0, 6),
                        },
                    ],
                    span: Span::new(0, 18),
                },
                guard: None,
                body: Expression::FunctionCall {
                    function: Box::new(Expression::Identifier {
                        name: "handle_message".to_string(),
                        span: Span::new(0, 14),
                    }),
                    args: vec![
                        Expression::Identifier {
                            name: "content".to_string(),
                            span: Span::new(0, 7),
                        },
                        Expression::Identifier {
                            name: "sender".to_string(),
                            span: Span::new(0, 6),
                        },
                    ],
                    span: Span::new(0, 25),
                },
                span: Span::new(0, 30),
            }],
            is_exhaustive: false,
            timeout: None,
            span: Span::new(0, 35),
        };

        let generated = ctx
            .expect_transpile_success(ctx.rust_generator.transpile_receive_block(&receive_block));

        // Verify enum variant destructuring
        assert!(generated
            .content
            .contains("Message::SendMessage { content, sender } =>"));

        // Verify variable binding
        assert!(generated
            .content
            .contains("self.handle_message(content, sender)"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_receive_with_guards() {
        let mut ctx = TranspilerTestContext::new();

        let receive_block = ReceiveBlock {
            arms: vec![ReceiveArm {
                pattern: Pattern::FunctionCall {
                    name: "SetValue".to_string(),
                    args: vec![Pattern::Identifier {
                        name: "value".to_string(),
                        span: Span::new(0, 5),
                    }],
                    span: Span::new(0, 12),
                },
                guard: Some(PatternGuard {
                    condition: Expression::BinaryOp {
                        op: BinaryOperator::GreaterThan,
                        left: Box::new(Expression::Identifier {
                            name: "value".to_string(),
                            span: Span::new(0, 5),
                        }),
                        right: Box::new(Expression::IntLiteral(0)),
                        span: Span::new(0, 10),
                    },
                    span: Span::new(0, 10),
                }),
                body: Expression::Assignment {
                    target: Box::new(Expression::FieldAccess {
                        object: Box::new(Expression::Identifier {
                            name: "self".to_string(),
                            span: Span::new(0, 4),
                        }),
                        field: "value".to_string(),
                        span: Span::new(0, 10),
                    }),
                    value: Box::new(Expression::Identifier {
                        name: "value".to_string(),
                        span: Span::new(0, 5),
                    }),
                    span: Span::new(0, 15),
                },
                span: Span::new(0, 20),
            }],
            is_exhaustive: false,
            timeout: None,
            span: Span::new(0, 25),
        };

        let generated = ctx
            .expect_transpile_success(ctx.rust_generator.transpile_receive_block(&receive_block));

        // Verify guard condition in Rust
        assert!(generated
            .content
            .contains("Message::SetValue { value } if value > 0 =>"));
        assert!(generated.content.contains("self.value = value"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_receive_with_timeout() {
        let mut ctx = TranspilerTestContext::new();

        let receive_block = ReceiveBlock {
            arms: vec![ReceiveArm {
                pattern: Pattern::Identifier {
                    name: "Message".to_string(),
                    span: Span::new(0, 7),
                },
                guard: None,
                body: Expression::FunctionCall {
                    function: Box::new(Expression::Identifier {
                        name: "handle".to_string(),
                        span: Span::new(0, 6),
                    }),
                    args: vec![],
                    span: Span::new(0, 8),
                },
                span: Span::new(0, 15),
            }],
            is_exhaustive: false,
            timeout: Some(ReceiveTimeout {
                duration: 5000,
                timeout_handler: Some(Expression::FunctionCall {
                    function: Box::new(Expression::Identifier {
                        name: "on_timeout".to_string(),
                        span: Span::new(0, 10),
                    }),
                    args: vec![],
                    span: Span::new(0, 12),
                }),
            }),
            span: Span::new(0, 20),
        };

        let generated = ctx
            .expect_transpile_success(ctx.rust_generator.transpile_receive_block(&receive_block));

        // Verify tokio timeout usage
        assert!(generated.content.contains("tokio::time::timeout"));
        assert!(generated.content.contains("Duration::from_millis(5000)"));

        // Verify timeout handling
        assert!(generated.content.contains("Err(_timeout) =>"));
        assert!(generated.content.contains("self.on_timeout()"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    // =================================================================
    // HOOK TRANSPILATION TESTS (Lifecycle Events)
    // =================================================================

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_hook_on_start() {
        let mut ctx = TranspilerTestContext::new();

        let hook = Hook {
            hook_type: HookType::OnStart,
            body: vec![Statement::Expression(Expression::FunctionCall {
                function: Box::new(Expression::Identifier {
                    name: "println".to_string(),
                    span: Span::new(0, 7),
                }),
                args: vec![Expression::StringLiteral {
                    value: "Actor started".to_string(),
                    span: Span::new(0, 15),
                }],
                span: Span::new(0, 20),
            })],
            span: Span::new(0, 25),
            is_async: false,
        };

        let generated = ctx.expect_transpile_success(ctx.actor_generator.transpile_hook(&hook));

        // Verify hook method generation
        assert!(generated.content.contains("async fn on_start(&mut self)"));
        assert!(generated.content.contains(r#"println!("Actor started")"#));

        // Verify integration with actor lifecycle
        assert!(generated.content.contains("// Called when actor starts"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_async_hook() {
        let mut ctx = TranspilerTestContext::new();

        let hook = Hook {
            hook_type: HookType::OnStart,
            body: vec![Statement::LetBinding {
                name: "config".to_string(),
                type_annotation: None,
                initializer: Some(Expression::Await {
                    expression: Box::new(Expression::FunctionCall {
                        function: Box::new(Expression::Identifier {
                            name: "load_config".to_string(),
                            span: Span::new(0, 11),
                        }),
                        args: vec![],
                        span: Span::new(0, 13),
                    }),
                    span: Span::new(0, 18),
                }),
                span: Span::new(0, 25),
            }],
            span: Span::new(0, 30),
            is_async: true,
        };

        let generated = ctx.expect_transpile_success(ctx.actor_generator.transpile_hook(&hook));

        // Verify async hook method
        assert!(generated.content.contains("async fn on_start(&mut self)"));

        // Verify await translation
        assert!(generated
            .content
            .contains("let config = load_config().await"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_hook_on_error_with_parameter() {
        let mut ctx = TranspilerTestContext::new();

        let hook = Hook {
            hook_type: HookType::OnError {
                error_param: Some("error".to_string()),
            },
            body: vec![Statement::Expression(Expression::FunctionCall {
                function: Box::new(Expression::Identifier {
                    name: "log_error".to_string(),
                    span: Span::new(0, 9),
                }),
                args: vec![Expression::Identifier {
                    name: "error".to_string(),
                    span: Span::new(0, 5),
                }],
                span: Span::new(0, 15),
            })],
            span: Span::new(0, 20),
            is_async: false,
        };

        let generated = ctx.expect_transpile_success(ctx.actor_generator.transpile_hook(&hook));

        // Verify error hook with parameter
        assert!(generated
            .content
            .contains("async fn on_error(&mut self, error: Box<dyn std::error::Error>)"));
        assert!(generated.content.contains("log_error(&error)"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    // =================================================================
    // MESSAGE SEND TRANSPILATION TESTS (Actor Communication)
    // =================================================================

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_fire_and_forget_send() {
        let mut ctx = TranspilerTestContext::new();

        let send_expr = SendExpr {
            receiver: Box::new(Expression::Identifier {
                name: "actor_ref".to_string(),
                span: Span::new(0, 9),
            }),
            message: Box::new(Expression::Identifier {
                name: "Increment".to_string(),
                span: Span::new(0, 9),
            }),
            send_type: SendType::Fire,
            span: Span::new(0, 20),
        };

        let generated =
            ctx.expect_transpile_success(ctx.rust_generator.transpile_send_expression(&send_expr));

        // Verify channel send
        assert!(generated
            .content
            .contains("actor_ref.send(Message::Increment)"));
        assert!(generated.content.contains(".unwrap_or_else(|_| "));

        // Verify non-blocking send
        assert!(!generated.content.contains(".await"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_request_response_send() {
        let mut ctx = TranspilerTestContext::new();

        let send_expr = SendExpr {
            receiver: Box::new(Expression::Identifier {
                name: "calculator".to_string(),
                span: Span::new(0, 10),
            }),
            message: Box::new(Expression::FunctionCall {
                function: Box::new(Expression::Identifier {
                    name: "Add".to_string(),
                    span: Span::new(0, 3),
                }),
                args: vec![Expression::IntLiteral(5), Expression::IntLiteral(3)],
                span: Span::new(0, 10),
            }),
            send_type: SendType::Call {
                timeout: Some(5000),
            },
            span: Span::new(0, 25),
        };

        let generated =
            ctx.expect_transpile_success(ctx.rust_generator.transpile_send_expression(&send_expr));

        // Verify request-response pattern
        assert!(generated.content.contains("tokio::sync::oneshot::channel"));
        assert!(generated
            .content
            .contains("Message::Add { a: 5, b: 3, reply_to }"));

        // Verify timeout handling
        assert!(generated.content.contains("tokio::time::timeout"));
        assert!(generated.content.contains("Duration::from_millis(5000)"));

        // Verify await for response
        assert!(generated.content.contains("rx.await"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_send_with_complex_message() {
        let mut ctx = TranspilerTestContext::new();

        let send_expr = SendExpr {
            receiver: Box::new(Expression::Identifier {
                name: "chat_agent".to_string(),
                span: Span::new(0, 10),
            }),
            message: Box::new(Expression::FunctionCall {
                function: Box::new(Expression::Identifier {
                    name: "SendMessage".to_string(),
                    span: Span::new(0, 11),
                }),
                args: vec![
                    Expression::StringLiteral {
                        value: "Hello World".to_string(),
                        span: Span::new(0, 13),
                    },
                    Expression::Identifier {
                        name: "sender_ref".to_string(),
                        span: Span::new(0, 10),
                    },
                ],
                span: Span::new(0, 25),
            }),
            send_type: SendType::Fire,
            span: Span::new(0, 35),
        };

        let generated =
            ctx.expect_transpile_success(ctx.rust_generator.transpile_send_expression(&send_expr));

        // Verify message construction
        assert!(generated.content.contains("Message::SendMessage"));
        assert!(generated
            .content
            .contains(r#"content: "Hello World".to_string()"#));
        assert!(generated.content.contains("sender: sender_ref"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    // =================================================================
    // SPAWN EXPRESSION TRANSPILATION TESTS (Actor Creation)
    // =================================================================

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_basic_spawn_expression() {
        let mut ctx = TranspilerTestContext::new();

        let spawn_expr = SpawnExpr {
            actor_type: "ChatAgent".to_string(),
            args: vec![],
            supervisor: None,
            spawn_options: SpawnOptions::default(),
            span: Span::new(0, 17),
        };

        let generated = ctx
            .expect_transpile_success(ctx.rust_generator.transpile_spawn_expression(&spawn_expr));

        // Verify actor creation
        assert!(generated.content.contains("let actor = ChatAgent::new()"));

        // Verify channel creation
        assert!(generated
            .content
            .contains("tokio::sync::mpsc::unbounded_channel"));

        // Verify tokio spawn
        assert!(generated.content.contains("tokio::spawn(async move"));

        // Verify actor handle return
        assert!(generated.content.contains("ActorHandle::new(sender)"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_spawn_with_arguments() {
        let mut ctx = TranspilerTestContext::new();

        let spawn_expr = SpawnExpr {
            actor_type: "Counter".to_string(),
            args: vec![
                Expression::IntLiteral(0),
                Expression::StringLiteral {
                    value: "counter1".to_string(),
                    span: Span::new(0, 10),
                },
            ],
            supervisor: None,
            spawn_options: SpawnOptions::default(),
            span: Span::new(0, 25),
        };

        let generated = ctx
            .expect_transpile_success(ctx.rust_generator.transpile_spawn_expression(&spawn_expr));

        // Verify actor creation with arguments
        assert!(generated
            .content
            .contains(r#"let actor = Counter::with_params(0, "counter1".to_string())"#));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_spawn_with_supervisor() {
        let mut ctx = TranspilerTestContext::new();

        let spawn_expr = SpawnExpr {
            actor_type: "Worker".to_string(),
            args: vec![],
            supervisor: Some("MainSupervisor".to_string()),
            spawn_options: SpawnOptions {
                restart_strategy: Some(RestartStrategy::OneForOne),
                max_restarts: Some(3),
                restart_period: Some(60000),
                shutdown_timeout: Some(5000),
            },
            span: Span::new(0, 30),
        };

        let generated = ctx
            .expect_transpile_success(ctx.rust_generator.transpile_spawn_expression(&spawn_expr));

        // Verify supervisor integration
        assert!(generated.content.contains("main_supervisor.add_child"));
        assert!(generated.content.contains("ChildSpec::new"));
        assert!(generated.content.contains("RestartStrategy::OneForOne"));
        assert!(generated.content.contains("max_restarts: 3"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    // =================================================================
    // SUPERVISION TRANSPILATION TESTS (Fault Tolerance)
    // =================================================================

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_basic_supervisor() {
        let mut ctx = TranspilerTestContext::new();

        let supervisor_def = SupervisorDef {
            name: "ChatSupervisor".to_string(),
            strategy: RestartStrategy::OneForOne,
            child_specs: vec![],
            max_restarts: 3,
            max_seconds: 60,
            span: Span::new(0, 40),
        };

        let generated = ctx.expect_transpile_success(ctx.transpile_supervisor(&supervisor_def));

        // Verify supervisor struct
        assert!(generated.content.contains("pub struct ChatSupervisor"));
        assert!(generated
            .content
            .contains("children: HashMap<String, ChildState>"));
        assert!(generated
            .content
            .contains("restart_counts: HashMap<String, u32>"));

        // Verify supervisor implementation
        assert!(generated.content.contains("impl ChatSupervisor"));
        assert!(generated.content.contains("pub fn new() -> Self"));

        // Verify restart strategy implementation
        assert!(generated.content.contains("async fn handle_child_failure"));
        assert!(generated.content.contains("RestartStrategy::OneForOne"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_supervisor_with_children() {
        let mut ctx = TranspilerTestContext::new();

        let supervisor_def = SupervisorDef {
            name: "WorkerSupervisor".to_string(),
            strategy: RestartStrategy::OneForAll,
            child_specs: vec![
                ChildSpec {
                    id: "worker1".to_string(),
                    actor_type: "Worker".to_string(),
                    args: vec![Expression::IntLiteral(1)],
                    restart_type: RestartType::Permanent,
                    shutdown_type: ShutdownType::Timeout(5000),
                    span: Span::new(0, 20),
                },
                ChildSpec {
                    id: "worker2".to_string(),
                    actor_type: "Worker".to_string(),
                    args: vec![Expression::IntLiteral(2)],
                    restart_type: RestartType::Transient,
                    shutdown_type: ShutdownType::BrutalKill,
                    span: Span::new(0, 20),
                },
            ],
            max_restarts: 5,
            max_seconds: 300,
            span: Span::new(0, 60),
        };

        let generated = ctx.expect_transpile_success(ctx.transpile_supervisor(&supervisor_def));

        // Verify child specifications
        assert!(generated
            .content
            .contains(r#"("worker1".to_string(), ChildSpec"#));
        assert!(generated.content.contains("RestartType::Permanent"));
        assert!(generated.content.contains("ShutdownType::Timeout(5000)"));

        // Verify one-for-all strategy
        assert!(generated.content.contains("RestartStrategy::OneForAll"));
        assert!(generated.content.contains("async fn restart_all_children"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_supervisor_restart_strategies() {
        let mut ctx = TranspilerTestContext::new();

        let restart_strategies = vec![
            RestartStrategy::OneForOne,
            RestartStrategy::OneForAll,
            RestartStrategy::RestForOne,
            RestartStrategy::SimpleOneForOne,
        ];

        for strategy in restart_strategies {
            let supervisor_def = SupervisorDef {
                name: format!("{}Supervisor", format!("{:?}", strategy)),
                strategy,
                child_specs: vec![],
                max_restarts: 3,
                max_seconds: 60,
                span: Span::new(0, 30),
            };

            let generated = ctx.expect_transpile_success(ctx.transpile_supervisor(&supervisor_def));

            // Verify strategy-specific implementation
            match strategy {
                RestartStrategy::OneForOne => {
                    assert!(generated.content.contains("async fn restart_one_child"));
                }
                RestartStrategy::OneForAll => {
                    assert!(generated.content.contains("async fn restart_all_children"));
                }
                RestartStrategy::RestForOne => {
                    assert!(generated.content.contains("async fn restart_rest_children"));
                }
                RestartStrategy::SimpleOneForOne => {
                    assert!(generated.content.contains("async fn add_dynamic_child"));
                }
            }

            assert!(ctx.verify_generated_rust_compiles(&generated));
        }
    }

    // =================================================================
    // TOKIO INTEGRATION TESTS (Runtime Setup and Async Orchestration)
    // =================================================================

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_generate_tokio_runtime_setup() {
        let mut ctx = TranspilerTestContext::new();

        let actors = vec![
            &ActorDef {
                name: "ChatAgent".to_string(),
                type_params: vec![],
                state_params: vec![],
                body: vec![],
                span: Span::new(0, 15),
                visibility: Visibility::Public,
                attributes: vec![],
            },
            &ActorDef {
                name: "Counter".to_string(),
                type_params: vec![],
                state_params: vec![],
                body: vec![],
                span: Span::new(0, 12),
                visibility: Visibility::Public,
                attributes: vec![],
            },
        ];

        let generated = ctx.expect_transpile_success(ctx.generate_tokio_runtime(&actors));

        // Verify runtime setup
        assert!(generated.content.contains("#[tokio::main]"));
        assert!(generated.content.contains("async fn main()"));

        // Verify actor system initialization
        assert!(generated
            .content
            .contains("let mut actor_system = ActorSystem::new()"));

        // Verify actor registrations
        assert!(generated
            .content
            .contains("actor_system.register::<ChatAgent>()"));
        assert!(generated
            .content
            .contains("actor_system.register::<Counter>()"));

        // Verify runtime start
        assert!(generated.content.contains("actor_system.start().await"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_generate_actor_handle_trait() {
        let mut ctx = TranspilerTestContext::new();

        let generated =
            ctx.expect_transpile_success(ctx.tokio_integration.generate_actor_handle_trait());

        // Verify ActorHandle trait
        assert!(generated
            .content
            .contains("pub trait ActorHandle: Send + Sync"));
        assert!(generated
            .content
            .contains("async fn send(&self, message: Message)"));
        assert!(generated
            .content
            .contains("async fn call(&self, message: Message)"));
        assert!(generated.content.contains("async fn stop(&self)"));

        // Verify concrete implementation
        assert!(generated.content.contains("pub struct ActorHandleImpl<T>"));
        assert!(generated
            .content
            .contains("impl<T> ActorHandle for ActorHandleImpl<T>"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_generate_message_enum() {
        let mut ctx = TranspilerTestContext::new();

        let message_types = vec![
            MessageType::simple("Increment", vec![]),
            MessageType::simple("SetValue", vec![Type::Int32]),
            MessageType {
                name: "GetValue".to_string(),
                params: vec![],
                return_type: Some(Type::Int32),
                is_async: false,
            },
        ];

        let generated = ctx.expect_transpile_success(
            ctx.rust_generator
                .generate_message_enum("CounterMessage", &message_types),
        );

        // Verify enum definition
        assert!(generated.content.contains("#[derive(Debug, Clone)]"));
        assert!(generated.content.contains("pub enum CounterMessage"));

        // Verify variants
        assert!(generated.content.contains("Increment"));
        assert!(generated.content.contains("SetValue(i32)"));
        assert!(generated
            .content
            .contains("GetValue { reply_to: tokio::sync::oneshot::Sender<i32> }"));

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }

    // =================================================================
    // PROPERTY-BASED TRANSPILER TESTS (Code Generation Invariants)
    // =================================================================

    proptest! {
        #[test]
        #[ignore] // EXTREME TDD: Property tests first, no implementation yet
        fn prop_generated_rust_is_valid(
            actor_name in r"[A-Z][a-zA-Z0-9_]*"
        ) {
            let mut ctx = TranspilerTestContext::new();

            let actor_def = ActorDef {
                name: actor_name.clone(),
                type_params: vec![],
                state_params: vec![],
                body: vec![],
                span: Span::new(0, actor_name.len() + 10),
                visibility: Visibility::Public,
                attributes: vec![],
            };

            let result = ctx.transpile_actor(&actor_def);
            prop_assert!(result.is_ok());

            if let Ok(generated) = result {
                // Property: Generated Rust should always be syntactically valid
                prop_assert!(ctx.verify_generated_rust_compiles(&generated));

                // Property: Should contain expected structures
                prop_assert!(generated.content.contains(&format!("pub struct {}", actor_name)));
                prop_assert!(generated.content.contains(&format!("impl {}", actor_name)));
            }
        }

        #[test]
        #[ignore] // EXTREME TDD: Property tests first, no implementation yet
        fn prop_message_enum_completeness(
            message_names in prop::collection::vec(r"[A-Z][a-zA-Z0-9_]*", 1..10)
        ) {
            let mut ctx = TranspilerTestContext::new();

            let message_types: Vec<MessageType> = message_names.iter().map(|name| {
                MessageType::simple(name, vec![])
            }).collect();

            let result = ctx.rust_generator.generate_message_enum("TestMessage", &message_types);
            prop_assert!(result.is_ok());

            if let Ok(generated) = result {
                // Property: All message variants should be present
                for name in &message_names {
                    prop_assert!(generated.content.contains(name));
                }

                prop_assert!(ctx.verify_generated_rust_compiles(&generated));
            }
        }

        #[test]
        #[ignore] // EXTREME TDD: Property tests first, no implementation yet
        fn prop_supervision_hierarchy_consistency(
            child_count in 1usize..5,
            restart_strategy in prop::sample::select(vec![
                RestartStrategy::OneForOne,
                RestartStrategy::OneForAll,
                RestartStrategy::RestForOne,
            ])
        ) {
            let mut ctx = TranspilerTestContext::new();

            let child_specs: Vec<ChildSpec> = (0..child_count).map(|i| {
                ChildSpec {
                    id: format!("child_{}", i),
                    actor_type: format!("Child{}", i),
                    args: vec![],
                    restart_type: RestartType::Permanent,
                    shutdown_type: ShutdownType::Timeout(5000),
                    span: Span::new(0, 10),
                }
            }).collect();

            let supervisor_def = SupervisorDef {
                name: "TestSupervisor".to_string(),
                strategy: restart_strategy,
                child_specs,
                max_restarts: 3,
                max_seconds: 60,
                span: Span::new(0, 50),
            };

            let result = ctx.transpile_supervisor(&supervisor_def);
            prop_assert!(result.is_ok());

            if let Ok(generated) = result {
                // Property: All children should be managed
                for i in 0..child_count {
                    prop_assert!(generated.content.contains(&format!("child_{}", i)));
                }

                prop_assert!(ctx.verify_generated_rust_compiles(&generated));
            }
        }
    }

    // =================================================================
    // TRANSPILER ERROR HANDLING TESTS (Graceful Failure)
    // =================================================================

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_error_undefined_type() {
        let mut ctx = TranspilerTestContext::new();

        let actor_def = ActorDef {
            name: "TestActor".to_string(),
            type_params: vec![],
            state_params: vec![StateParam {
                name: "data".to_string(),
                param_type: Type::Custom("UndefinedType".to_string()),
                default_value: None,
                mutability: Mutability::Immutable,
                span: Span::new(0, 4),
            }],
            body: vec![],
            span: Span::new(0, 30),
            visibility: Visibility::Public,
            attributes: vec![],
        };

        let error = ctx.expect_transpile_error(ctx.transpile_actor(&actor_def));

        assert!(matches!(
            error.kind,
            TranspileErrorKind::UndefinedType { .. }
        ));
        assert!(error.message.contains("UndefinedType"));
        assert!(error.span == Span::new(0, 4));
    }

    #[test]
    #[ignore] // EXTREME TDD: Test first, no implementation yet
    fn test_transpile_error_invalid_message_type() {
        let mut ctx = TranspilerTestContext::new();

        let receive_block = ReceiveBlock {
            arms: vec![ReceiveArm {
                pattern: Pattern::FunctionCall {
                    name: "InvalidMessage".to_string(),
                    args: vec![Pattern::Identifier {
                        name: "data".to_string(),
                        span: Span::new(0, 4),
                    }],
                    span: Span::new(0, 16),
                },
                guard: None,
                body: Expression::Unit,
                span: Span::new(0, 20),
            }],
            is_exhaustive: false,
            timeout: None,
            span: Span::new(0, 25),
        };

        let error =
            ctx.expect_transpile_error(ctx.rust_generator.transpile_receive_block(&receive_block));

        assert!(matches!(
            error.kind,
            TranspileErrorKind::UndefinedMessage { .. }
        ));
        assert!(error.message.contains("InvalidMessage"));
    }

    // =================================================================
    // PERFORMANCE AND OPTIMIZATION TESTS
    // =================================================================

    #[test]
    #[ignore] // EXTREME TDD: Performance tests first, no implementation yet
    fn test_transpiler_performance_large_actor() {
        use std::time::Instant;

        let mut ctx = TranspilerTestContext::new();

        // Create large actor with many receive arms
        let receive_arms: Vec<ReceiveArm> = (0..1000)
            .map(|i| ReceiveArm {
                pattern: Pattern::Identifier {
                    name: format!("Message{}", i),
                    span: Span::new(0, 10),
                },
                guard: None,
                body: Expression::FunctionCall {
                    function: Box::new(Expression::Identifier {
                        name: format!("handle{}", i),
                        span: Span::new(0, 8),
                    }),
                    args: vec![],
                    span: Span::new(0, 10),
                },
                span: Span::new(0, 15),
            })
            .collect();

        let large_actor = ActorDef {
            name: "LargeActor".to_string(),
            type_params: vec![],
            state_params: vec![],
            body: vec![ActorBodyItem::Receive(ReceiveBlock {
                arms: receive_arms,
                is_exhaustive: false,
                timeout: None,
                span: Span::new(0, 5000),
            })],
            span: Span::new(0, 6000),
            visibility: Visibility::Public,
            attributes: vec![],
        };

        let start = Instant::now();
        let result = ctx.transpile_actor(&large_actor);
        let duration = start.elapsed();

        assert!(result.is_ok());
        assert!(duration.as_millis() < 2000); // Transpile large actor in <2s

        if let Ok(generated) = result {
            assert!(generated.content.len() > 10000); // Should generate substantial code
            assert!(ctx.verify_generated_rust_compiles(&generated));
        }
    }

    #[test]
    #[ignore] // EXTREME TDD: Code quality tests first, no implementation yet
    fn test_generated_code_quality() {
        let mut ctx = TranspilerTestContext::new();

        let actor_def = ActorDef {
            name: "QualityTestActor".to_string(),
            type_params: vec![],
            state_params: vec![],
            body: vec![],
            span: Span::new(0, 20),
            visibility: Visibility::Public,
            attributes: vec![],
        };

        let generated = ctx.expect_transpile_success(ctx.transpile_actor(&actor_def));

        // Verify code quality standards
        assert!(!generated.content.contains("unsafe")); // No unsafe code
        assert!(!generated.content.contains("unwrap()")); // Proper error handling
        assert!(generated.content.contains("// ")); // Comments present
        assert!(generated.content.contains("#[derive(")); // Proper derives

        // Verify idiomatic Rust patterns
        assert!(generated.content.contains("impl")); // Implementation blocks
        assert!(generated.content.contains("pub")); // Proper visibility
        assert!(generated.content.contains("async")); // Async patterns

        assert!(ctx.verify_generated_rust_compiles(&generated));
    }
}
