#![allow(clippy::ignore_without_reason)] // Test file with known limitations
#![allow(missing_docs)]

// RUNTIME-001: Baseline Audit - Parser vs Runtime Status
// Purpose: Document what parses vs what executes for parser-only features
// Status: These tests DOCUMENT CURRENT STATE (parser succeeds, runtime fails)
//
// EXTREME TDD Protocol: RED phase - these tests currently FAIL (runtime not implemented)
// Once features are implemented (GREEN phase), these tests will PASS
//
// Features being audited:
// 1. Structs (value types)
// 2. Classes (reference types)
// 3. Actors (message-passing)
// 4. Async/Await (concurrency)

use assert_cmd::Command;
use predicates::prelude::*;

/// Helper to get ruchy binary command
fn ruchy_cmd() -> Command {
    Command::cargo_bin("ruchy").expect("Failed to find ruchy binary")
}

// ==================== STRUCTS: Parser vs Runtime ====================

#[test]
fn test_runtime_001_struct_parser_accepts_definition() {
    // Parser SHOULD accept struct definition
    // NOTE: Using -e flag for inline code evaluation
    ruchy_cmd()
        .arg("-e")
        .arg("struct Point { x: i32, y: i32 }; 42")
        .assert()
        .success(); // ✅ Parser accepts it
}

#[test]
#[ignore = "RED phase: Currently FAILS because structs don't execute"]
fn test_runtime_001_struct_runtime_executes_instantiation() {
    // Runtime SHOULD execute struct instantiation (this currently fails)
    ruchy_cmd()
        .arg("-e")
        .arg("struct Point { x: i32, y: i32 }; let p = Point { x: 10, y: 20 }; println!(p.x)")
        .assert()
        .success() // ❌ Currently fails - runtime not implemented
        .stdout(predicate::str::contains("10"));
}

#[test]
#[ignore = "RED phase: Currently FAILS"]
fn test_runtime_001_struct_runtime_field_access() {
    ruchy_cmd()
        .arg("-e")
        .arg("struct Point { x: i32, y: i32 }; let p = Point { x: 10, y: 20 }; println!(p.y)")
        .assert()
        .success()
        .stdout(predicate::str::contains("20"));
}

#[test]
#[ignore = "RED phase: Currently FAILS"]
fn test_runtime_001_struct_runtime_value_semantics() {
    // Test that structs have value semantics (copy on assign)
    ruchy_cmd()
        .arg("-e")
        .arg("struct Point { x: i32, y: i32 }; let p1 = Point { x: 0, y: 0 }; let p2 = p1; p2.x = 10; println!(p1.x)")
        .assert()
        .success()
        .stdout(predicate::str::contains("0")); // p1 unchanged (value semantics)
}

// ==================== CLASSES: Parser vs Runtime ====================

#[test]
fn test_runtime_001_class_parser_accepts_definition() {
    // Parser SHOULD accept class definition
    ruchy_cmd()
        .arg("-e")
        .arg("class Person { name: String, age: i32 }; 42")
        .assert()
        .success(); // ✅ Parser accepts it
}

#[test]
#[ignore = "RED phase: Currently FAILS"]
fn test_runtime_001_class_runtime_executes_instantiation() {
    // Runtime SHOULD execute class instantiation (this currently fails)
    ruchy_cmd()
        .arg("-e")
        .arg("class Person { name: String, age: i32 init(name: String, age: i32) { self.name = name; self.age = age; } }; let person = Person(name: \"Alice\", age: 30); println!(person.name)")
        .assert()
        .success()
        .stdout(predicate::str::contains("Alice"));
}

#[test]
#[ignore = "RED phase: Currently FAILS"]
fn test_runtime_001_class_runtime_reference_semantics() {
    // Test that classes have reference semantics (shared on assign)
    ruchy_cmd()
        .arg("-e")
        .arg("class Person { age: i32 init(age: i32) { self.age = age; } }; let person1 = Person(age: 30); let person2 = person1; person2.age = 31; println!(person1.age)")
        .assert()
        .success()
        .stdout(predicate::str::contains("31")); // person1 sees change (reference semantics)
}

#[test]
#[ignore = "RED phase: Currently FAILS"]
fn test_runtime_001_class_runtime_identity_comparison() {
    // Test identity comparison (===)
    ruchy_cmd()
        .arg("-e")
        .arg("class Person { age: i32 init(age: i32) { self.age = age; } }; let person1 = Person(age: 30); let person2 = person1; let result = person1 === person2; println!(result)")
        .assert()
        .success()
        .stdout(predicate::str::contains("true")); // Same instance
}

// ==================== ACTORS: Parser vs Runtime ====================

#[test]
fn test_runtime_001_actor_parser_accepts_definition() {
    // Parser SHOULD accept actor definition
    ruchy_cmd()
        .arg("-e")
        .arg("actor Counter { count: i32 receive { Increment => self.count += 1, GetCount => self.count } }; 42")
        .assert()
        .success(); // ✅ Parser accepts it
}

#[test]
#[ignore = "RED phase: Currently FAILS"]
fn test_runtime_001_actor_runtime_spawn_and_send() {
    // Runtime SHOULD execute actor spawn and message sending (currently fails)
    ruchy_cmd()
        .arg("-e")
        .arg("actor Counter { count: i32 receive { Increment => self.count += 1, GetCount => self.count } }; let counter = Counter.spawn(); counter.send(Increment); counter.send(Increment); let result = counter.ask(GetCount); println!(result)")
        .assert()
        .success()
        .stdout(predicate::str::contains("2"));
}

// ==================== ASYNC/AWAIT: Parser vs Runtime ====================

#[test]
#[ignore = "NOT IMPLEMENTED: async keyword not recognized by parser"]
fn test_runtime_001_async_parser_accepts_async_fn() {
    // Parser SHOULD accept async fn (currently DOES NOT)
    // Error: "Expected 'fun', '{', '|', or identifier after 'async'"
    ruchy_cmd()
        .arg("-e")
        .arg("async fn fetch_data() -> String { \"data\" }; 42")
        .assert()
        .success(); // ❌ Parser does NOT accept it (keyword not implemented)
}

#[test]
#[ignore = "NOT IMPLEMENTED: async keyword not recognized by parser"]
fn test_runtime_001_async_parser_accepts_await() {
    // Parser SHOULD accept await expression (currently DOES NOT)
    ruchy_cmd()
        .arg("-e")
        .arg("async fn fetch_data() -> String { \"data\" }; async fn main() { let result = await fetch_data(); }; 42")
        .assert()
        .success(); // ❌ Parser does NOT accept it
}

#[test]
#[ignore = "RED phase: Currently FAILS"]
fn test_runtime_001_async_runtime_executes_async_fn() {
    // Runtime SHOULD execute async fn (currently fails)
    ruchy_cmd()
        .arg("-e")
        .arg("async fn fetch_data() -> String { \"data\" }; async fn main() { let result = await fetch_data(); println!(result); }")
        .assert()
        .success()
        .stdout(predicate::str::contains("data"));
}

#[test]
#[ignore = "RED phase: Currently FAILS"]
fn test_runtime_001_async_runtime_concurrent_execution() {
    // Test that async functions can run concurrently
    ruchy_cmd()
        .arg("-e")
        .arg("async fn task1() -> i32 { 1 }; async fn task2() -> i32 { 2 }; async fn main() { let result1 = await task1(); let result2 = await task2(); println!(result1 + result2); }")
        .assert()
        .success()
        .stdout(predicate::str::contains("3"));
}

// ==================== BASELINE SUMMARY ====================

#[test]
fn test_runtime_001_baseline_summary() {
    // This test documents the current state for the baseline audit
    //
    // Parser Status (✅ = passes, ❌ = fails):
    // ✅ Structs: Parser accepts struct definitions (test_runtime_001_struct_parser_accepts_definition PASSING)
    // ✅ Classes: Parser accepts class definitions (test_runtime_001_class_parser_accepts_definition PASSING)
    // ✅ Actors: Parser accepts actor definitions (test_runtime_001_actor_parser_accepts_definition PASSING)
    // ❌ Async/Await: Parser REJECTS async fn and await (keyword not implemented in parser!)
    //
    // Runtime Status (all currently ❌):
    // ❌ Structs: Runtime does NOT execute struct instantiation/field access (tests ignored)
    // ❌ Classes: Runtime does NOT execute class instantiation/methods (tests ignored)
    // ❌ Actors: Runtime does NOT execute actor spawn/message passing (tests ignored)
    // ❌ Async/Await: NOT IMPLEMENTED at parser level (must implement parser first, then runtime)
    //
    // Priority for Implementation (REVISED based on baseline findings):
    // 1. Structs (simplest - parser works, need runtime only)
    // 2. Classes (parser works, need runtime only)
    // 3. Actors (parser works, need runtime only)
    // 4. Async/Await (BLOCKED - must implement parser keyword first, then runtime)
    //
    // CRITICAL FINDING: Async/Await is NOT parser-only - it's COMPLETELY UNIMPLEMENTED!
    // The specification incorrectly stated "await parses but NOT runtime-functional"
    // Reality: "async" keyword not recognized by parser at all
    //
    // Test Results Summary:
    // - 4 tests PASSING (3 parser accept tests + this summary)
    // - 9 tests IGNORED (runtime execution not implemented)
    // - 2 tests show async/await not implemented at parser level

    // This test always passes - it's documentation
    assert!(true, "Baseline audit documented - 3 features parse correctly, 1 not implemented");
}
