//! Error handling tests for ggen node bindings
//!
//! These tests validate that all error paths are handled correctly
//! without panicking or using production anti-patterns.
//! Follows chicago-tdd-tools v1.3.0 pattern for comprehensive error path testing.

use chicago_tdd_tools::prelude::*;
use ggen_cli_lib::run_for_node;

async_test!(test_empty_args_handled, {
    // Arrange: No arguments
    let args = vec![];

    // Act: Run with empty args
    let result = run_for_node(args).await;

    // Assert: Should handle gracefully without panic
    match result {
        Ok(res) => {
            // Empty args should either show help or error with code
            assert!(res.code >= 0);
        }
        Err(_) => {
            // Error path is acceptable, shouldn't panic
        }
    }
});

async_test!(test_null_byte_in_args, {
    // Arrange: Create argument with null byte (boundary condition)
    let args = vec!["test\0string".to_string()];

    // Act: Run with invalid UTF-8
    let result = run_for_node(args).await;

    // Assert: Should handle gracefully without panic
    match result {
        Ok(_) => {
            // Should handle gracefully
        }
        Err(e) => {
            // Should return error, not panic
            let error_msg = format!("{}", e);
            assert!(!error_msg.is_empty(), "Error message should not be empty");
        }
    }
});

async_test!(test_very_long_argument, {
    // Arrange: Create very long argument (boundary: 100K chars)
    let long_arg = "a".repeat(100_000);
    let args = vec!["market".to_string(), "search".to_string(), long_arg];

    // Act: Run with long argument
    let result = run_for_node(args).await;

    // Assert: Should handle resource constraint gracefully
    match result {
        Ok(res) => {
            // Should complete or error gracefully
            assert!(res.code >= 0, "Exit code should be valid");
        }
        Err(e) => {
            // Error is acceptable for resource limits
            let error_msg = format!("{}", e);
            assert!(!error_msg.is_empty(), "Error message should not be empty");
        }
    }
});

async_test!(test_invalid_utf8_sequence, {
    // Arrange: Create string with zero-width characters (edge case)
    let tricky_string = "Hello\u{FEFF}\u{200B}World";
    let args = vec![
        "market".to_string(),
        "search".to_string(),
        tricky_string.to_string(),
    ];

    // Act: Run with tricky string
    let result = run_for_node(args).await;

    // Assert: Output should remain valid
    match result {
        Ok(res) => {
            // Output should be valid UTF-8
            assert!(
                std::str::from_utf8(res.stdout.as_bytes()).is_ok(),
                "Stdout should be valid UTF-8"
            );
            assert!(
                std::str::from_utf8(res.stderr.as_bytes()).is_ok(),
                "Stderr should be valid UTF-8"
            );
        }
        Err(_) => {
            // Error path is acceptable for edge cases
        }
    }
});

async_test!(test_path_traversal_attempt, {
    // Arrange: Create path traversal attack string (security test)
    let args = vec![
        "market".to_string(),
        "search".to_string(),
        "../../../etc/passwd".to_string(),
    ];

    // Act: Run with path traversal attempt
    let result = run_for_node(args).await;

    // Assert: Should not allow filesystem access vulnerability
    match result {
        Ok(res) => {
            assert!(res.code >= 0, "Should handle gracefully");
        }
        Err(_) => {
            // Error is expected and acceptable for security boundary
        }
    }
});

async_test!(test_command_injection_attempt, {
    // Arrange: Create command injection string (security test)
    let args = vec![
        "market".to_string(),
        "search".to_string(),
        "test; rm -rf /".to_string(),
    ];

    // Act: Run with command injection attempt
    let result = run_for_node(args).await;

    // Assert: Should treat as literal string, not execute
    match result {
        Ok(res) => {
            // Should handle gracefully
            assert!(res.code >= 0);
        }
        Err(_) => {
            // Error is acceptable
        }
    }
});

async_test!(test_sql_injection_attempt, {
    // Arrange: Create SQL injection string (security test)
    let args = vec![
        "market".to_string(),
        "search".to_string(),
        "'; DROP TABLE packages; --".to_string(),
    ];

    // Act: Run with SQL injection attempt
    let result = run_for_node(args).await;

    // Assert: Should treat as literal search string
    match result {
        Ok(res) => {
            assert!(res.code >= 0);
        }
        Err(_) => {
            // Error is acceptable
        }
    }
});

async_test!(test_multiple_errors_in_sequence, {
    // Arrange: Create multiple error conditions
    let error_sequences = vec![
        vec!["invalid1".to_string()],
        vec!["invalid2".to_string()],
        vec!["invalid3".to_string()],
    ];

    // Act: Run each error sequence
    let mut error_count = 0;
    for (i, args) in error_sequences.iter().enumerate() {
        let result = run_for_node(args.clone()).await;
        if result.is_err() {
            error_count += 1;
        } else {
            // Verify each error is independent
            assert!(result.is_ok(), "Error {} should be handled", i);
        }
    }

    // Assert: Should handle multiple errors independently
    assert!(error_count <= 3, "Multiple errors should be independent");
});

async_test!(test_unicode_edge_cases, {
    // Arrange: Create test cases with various Unicode characters
    let test_cases = vec![
        ("🚀", "emoji"),
        ("你好世界", "chinese"),
        ("Привет", "russian"),
        ("مرحبا", "arabic_rtl"),
        ("\u{1F600}\u{1F601}", "multiple_emojis"),
        ("A\u{0301}", "combining_char"),
    ];

    // Act & Assert: Test each Unicode edge case
    for (test_case, description) in test_cases {
        let args = vec![
            "market".to_string(),
            "search".to_string(),
            test_case.to_string(),
        ];
        let result = run_for_node(args).await;

        match result {
            Ok(res) => {
                // Should handle all Unicode gracefully
                assert!(res.code >= 0, "Should handle {} gracefully", description);
            }
            Err(_) => {
                // Error is acceptable for edge cases
            }
        }
    }
});

async_test!(test_whitespace_edge_cases, {
    // Arrange: Create test cases with various whitespace
    let test_cases = vec![
        ("   ", "spaces_only"),
        ("\t\t\t", "tabs_only"),
        ("\n\n", "newlines_only"),
        ("\r\n", "windows_newlines"),
        (" \t\n\r ", "mixed_whitespace"),
    ];

    // Act & Assert: Test each whitespace edge case
    for (test_case, description) in test_cases {
        let args = vec![
            "market".to_string(),
            "search".to_string(),
            test_case.to_string(),
        ];
        let result = run_for_node(args).await;

        match result {
            Ok(res) => {
                assert!(res.code >= 0, "Should handle {} gracefully", description);
            }
            Err(_) => {
                // Error is acceptable for edge cases
            }
        }
    }
});

async_test!(test_binary_data_in_args, {
    // Arrange: Create binary data string (boundary condition)
    let binary_string = String::from_utf8_lossy(&[0xFF, 0xFE, 0xFD, 0x00]).to_string();
    let args = vec!["market".to_string(), "search".to_string(), binary_string];

    // Act: Run with binary data
    let result = run_for_node(args).await;

    // Assert: Should handle binary data without panic
    match result {
        Ok(res) => {
            assert!(res.code >= 0);
        }
        Err(_) => {
            // Error is expected and acceptable
        }
    }
});

async_test!(test_maximum_args_count, {
    // Arrange: Create arguments with many entries (boundary: 100 args)
    let mut args = vec!["market".to_string(), "search".to_string()];
    for i in 0..100 {
        args.push(format!("arg{}", i));
    }

    // Act: Run with many arguments
    let result = run_for_node(args).await;

    // Assert: Should handle argument overflow gracefully
    match result {
        Ok(res) => {
            assert!(res.code >= 0, "Should handle many args");
        }
        Err(_) => {
            // Error is acceptable for boundary condition
        }
    }
});

async_test!(test_empty_string_args, {
    // Arrange: Create args with empty string (boundary condition)
    let args = vec!["market".to_string(), "".to_string(), "search".to_string()];

    // Act: Run with empty argument
    let result = run_for_node(args).await;

    // Assert: Should handle empty string gracefully
    match result {
        Ok(res) => {
            assert!(res.code >= 0);
        }
        Err(_) => {
            // Error is acceptable
        }
    }
});

async_test!(test_duplicate_flags, {
    // Arrange: Create duplicate flags (boundary: redundant input)
    let args = vec![
        "--help".to_string(),
        "--help".to_string(),
        "--help".to_string(),
    ];

    // Act: Run with duplicate flags
    let result = run_for_node(args).await;

    // Assert: Should handle duplicate flags gracefully
    match result {
        Ok(res) => {
            assert!(res.code >= 0);
        }
        Err(_) => {
            // Error is acceptable
        }
    }
});

async_test!(test_conflicting_args, {
    // Arrange: Create conflicting arguments (boundary: conflicting commands)
    let args = vec![
        "market".to_string(),
        "search".to_string(),
        "query".to_string(),
        "list".to_string(),
    ];

    // Act: Run with conflicting args
    let result = run_for_node(args).await;

    // Assert: Should handle conflicting commands gracefully
    match result {
        Ok(res) => {
            assert!(res.code >= 0, "Should handle conflicting args");
        }
        Err(_) => {
            // Error is acceptable for boundary condition
        }
    }
});

async_test!(test_no_memory_leak_on_error, {
    // Arrange: Create error conditions (resource cleanup test)
    let error_count = 10;

    // Act: Run multiple error-producing commands
    for i in 0..error_count {
        let result = run_for_node(vec!["invalid".to_string()]).await;
        // Error is expected - just verify no panic
        let _ = result;
        assert!(
            i < error_count,
            "Should complete all iterations without resource leak"
        );
    }

    // Assert: If there were memory leaks, this test would fail
    // Rust's ownership system prevents most leaks, but we verify anyway
});

async_test!(test_no_memory_leak_on_success, {
    // Arrange: Create success conditions (resource cleanup test)
    let iteration_count = 10;

    // Act: Run multiple successful commands
    let mut success_count = 0;
    for _ in 0..iteration_count {
        let result = run_for_node(vec!["--version".to_string()]).await;
        if result.is_ok() {
            success_count += 1;
        }
    }

    // Assert: Should complete all iterations without resource leak
    assert!(success_count > 0, "At least some commands should succeed");
});

async_test!(test_large_output_handling, {
    // Arrange: Create command with large output (resource test)
    let args = vec!["--help".to_string()];

    // Act: Run command that produces large output
    let result = run_for_node(args).await;

    // Assert: Should handle large output without memory issues
    match result {
        Ok(res) => {
            // Even large output should be handled correctly
            assert!(
                res.stdout.len() > 0 || res.stderr.len() >= 0,
                "Should handle output without resource exhaustion"
            );
        }
        Err(_) => {
            // Error is acceptable - should not cause memory leak
        }
    }
});
