//! Input bounds and size limit tests.

use do_memory_cli::test_utils::CliHarness;
use std::io::ErrorKind;

#[cfg(test)]
mod bounds_tests {
    use super::*;

    #[test]
    fn test_cli_input_bounds_clamping_limit() {
        let harness = CliHarness::new();

        // Test that very large limit values get clamped to safe maximums
        let oversized_limits = vec!["999999", "999999999", "18446744073709551615"];

        for limit in &oversized_limits {
            let mut result = harness.execute(["episode", "list", "--limit", limit]);
            match result.output() {
                Ok(output) => {
                    // Should either:
                    // - Succeed (limit clamped)
                    // - Fail due to missing storage features (not due to panics)
                    assert!(
                        !output.status.success(),
                        "Limit '{}' should produce non-zero exit without storage",
                        limit
                    );
                }
                Err(e) => {
                    // Accept spawn failures (argument list too long on some platforms)
                    assert!(
                        matches!(e.kind(), ErrorKind::NotFound | ErrorKind::PermissionDenied),
                        "Unexpected error kind {:?} for limit '{}'",
                        e.kind(),
                        limit
                    );
                }
            }
        }
    }

    #[test]
    fn test_cli_search_limit_bounds() {
        let harness = CliHarness::new();

        // Test that search limit values are handled safely
        let search_limits = vec!["0", "999999", "999999999"];

        for limit in &search_limits {
            let mut result = harness.execute(["episode", "search", "--limit", limit, "test"]);
            match result.output() {
                Ok(output) => {
                    assert!(
                        !output.status.success(),
                        "Search limit '{}' should produce non-zero exit without storage",
                        limit
                    );
                }
                Err(e) => {
                    // Accept spawn failures (argument list too long on some platforms)
                    assert!(
                        matches!(e.kind(), ErrorKind::NotFound | ErrorKind::PermissionDenied),
                        "Unexpected error kind {:?} for search limit '{}'",
                        e.kind(),
                        limit
                    );
                }
            }
        }
    }

    #[test]
    fn test_large_input_handling() {
        let harness = CliHarness::new();

        // Test with very large input (should not cause DoS)
        let large_input = "x".repeat(100000); // 100KB of input

        let mut result = harness.execute(["episode", "create", &large_input]);
        match result.output() {
            Ok(output) => {
                // If command spawned, should fail due to missing features
                assert!(!output.status.success());
            }
            Err(e) => {
                // Command failed to spawn due to argument list too long on Windows — acceptable
                assert!(
                    matches!(e.kind(), ErrorKind::NotFound | ErrorKind::PermissionDenied),
                    "Unexpected error kind {:?} for large input",
                    e.kind()
                );
            }
        }
    }

    #[test]
    fn test_large_input_size_limits() {
        let harness = CliHarness::new();

        // Test handling of very large inputs
        let large_inputs = vec![
            ("10KB input", "x".repeat(10 * 1024)),
            ("100KB input", "x".repeat(100 * 1024)),
            ("1MB input", "x".repeat(1024 * 1024)),
        ];

        for (description, input) in large_inputs {
            let mut result = harness.execute(["episode", "create", "--task", &input]);
            let output = match result.output() {
                Ok(output) => output,
                Err(_) => {
                    // Command failed to spawn (e.g., due to argument list too long)
                    // This is acceptable behavior for very large inputs
                    println!(
                        "{} failed to spawn (argument list too long) - acceptable",
                        description
                    );
                    continue;
                }
            };

            // Should handle large inputs without crashing
            assert!(
                output.status.code().is_some(),
                "{} caused crash",
                description
            );

            // Should not consume excessive memory (basic check)
            // In a real scenario, you'd monitor actual memory usage
            println!(
                "{} handled successfully (exit code: {:?})",
                description,
                output.status.code()
            );
        }
    }
}
