// Debug Adapter Protocol (DAP) handlers - Sprint 74
//
// Stub: Not yet implemented

// Placeholder for DAP server handler
#[provable_contracts_macros::contract("pmat-core.yaml", equation = "path_exists")]
pub async fn handle_debug_serve(
    _port: u16,
    _host: String,
    _record_dir: Option<std::path::PathBuf>,
) -> anyhow::Result<()> {
    anyhow::bail!("Debug serve command not yet implemented (DEBUG-002)")
}

// Placeholder for DAP replay handler
#[provable_contracts_macros::contract("pmat-core.yaml", equation = "path_exists")]
pub async fn handle_debug_replay(
    _recording: std::path::PathBuf,
    _position: Option<usize>,
    _interactive: bool,
) -> anyhow::Result<()> {
    anyhow::bail!("Debug replay command not yet implemented (DEBUG-003)")
}

// Placeholder for DAP compare handler
#[provable_contracts_macros::contract("pmat-core.yaml", equation = "check_compliance")]
pub async fn handle_debug_compare() -> anyhow::Result<()> {
    anyhow::bail!("Debug compare command not yet implemented")
}

// Placeholder for DAP timeline handler
#[provable_contracts_macros::contract("pmat-core.yaml", equation = "check_compliance")]
pub async fn handle_debug_timeline() -> anyhow::Result<()> {
    anyhow::bail!("Debug timeline command not yet implemented")
}

#[cfg_attr(coverage_nightly, coverage(off))]
#[cfg(test)]
mod coverage_tests {
    use super::*;
    use std::path::PathBuf;

    /// Test that handle_debug_serve returns the expected error
    #[tokio::test]
    async fn test_handle_debug_serve_returns_not_implemented() {
        let result = handle_debug_serve(8080, "localhost".to_string(), None).await;
        assert!(result.is_err());
        let err = result.unwrap_err();
        assert!(err.to_string().contains("DEBUG-002"));
        assert!(err.to_string().contains("not yet implemented"));
    }

    /// Test handle_debug_serve with various port values
    #[tokio::test]
    async fn test_handle_debug_serve_with_different_ports() {
        // Test with port 0
        let result = handle_debug_serve(0, "localhost".to_string(), None).await;
        assert!(result.is_err());

        // Test with max port
        let result = handle_debug_serve(65535, "127.0.0.1".to_string(), None).await;
        assert!(result.is_err());
    }

    /// Test handle_debug_serve with record_dir
    #[tokio::test]
    async fn test_handle_debug_serve_with_record_dir() {
        let record_dir = Some(PathBuf::from("/tmp/debug-recordings"));
        let result = handle_debug_serve(8080, "0.0.0.0".to_string(), record_dir).await;
        assert!(result.is_err());
        let err = result.unwrap_err();
        assert!(err.to_string().contains("DEBUG-002"));
    }

    /// Test that handle_debug_replay returns the expected error
    #[tokio::test]
    async fn test_handle_debug_replay_returns_not_implemented() {
        let recording = PathBuf::from("/tmp/recording.dap");
        let result = handle_debug_replay(recording, None, false).await;
        assert!(result.is_err());
        let err = result.unwrap_err();
        assert!(err.to_string().contains("DEBUG-003"));
        assert!(err.to_string().contains("not yet implemented"));
    }

    /// Test handle_debug_replay with position and interactive flags
    #[tokio::test]
    async fn test_handle_debug_replay_with_options() {
        let recording = PathBuf::from("/tmp/recording.dap");

        // With position
        let result = handle_debug_replay(recording.clone(), Some(42), false).await;
        assert!(result.is_err());

        // With interactive
        let result = handle_debug_replay(recording.clone(), None, true).await;
        assert!(result.is_err());

        // With both
        let result = handle_debug_replay(recording, Some(100), true).await;
        assert!(result.is_err());
    }

    /// Test that handle_debug_compare returns the expected error
    #[tokio::test]
    async fn test_handle_debug_compare_returns_not_implemented() {
        let result = handle_debug_compare().await;
        assert!(result.is_err());
        let err = result.unwrap_err();
        assert!(err.to_string().contains("not yet implemented"));
    }

    /// Test that handle_debug_timeline returns the expected error
    #[tokio::test]
    async fn test_handle_debug_timeline_returns_not_implemented() {
        let result = handle_debug_timeline().await;
        assert!(result.is_err());
        let err = result.unwrap_err();
        assert!(err.to_string().contains("not yet implemented"));
    }
}
