// DEBUG-003: Replay CLI Handler Tests
// Sprint 74 - RED Phase
//
// Tests for `pmat debug replay` command implementation
// These tests drive the creation of replay handler and Timeline UI integration

use std::path::PathBuf;
use tempfile::NamedTempFile;

// RED Test 1: Handler function exists and is callable
#[tokio::test]
async fn test_replay_handler_exists() {
    // This test drives the creation of the handle_debug_replay function
    // Expected: pmat::cli::handlers::debug_handlers::handle_debug_replay exists

    let recording = PathBuf::from("test_recording.pmat");
    let position = None;
    let interactive = false;

    // Try to call the handler (will fail until GREEN phase)
    let result =
        pmat::cli::handlers::debug_handlers::handle_debug_replay(recording, position, interactive)
            .await;

    // Handler should either succeed or return a meaningful error
    // (not panic or fail to compile)
    assert!(
        result.is_ok() || result.is_err(),
        "Handler should return a Result type"
    );
}

// RED Test 2: Handler validates recording file exists
#[tokio::test]
#[ignore = "RED phase test - debug replay validation not yet implemented"]
async fn test_replay_validates_file_exists() {
    // This test ensures the handler checks if recording file exists
    // before attempting to load it

    let nonexistent = PathBuf::from("/nonexistent/recording.pmat");

    let result =
        pmat::cli::handlers::debug_handlers::handle_debug_replay(nonexistent.clone(), None, false)
            .await;

    // Should return an error for nonexistent file
    assert!(result.is_err(), "Should fail for nonexistent file");

    let error_msg = result.unwrap_err().to_string();
    assert!(
        error_msg.contains("not found")
            || error_msg.contains("does not exist")
            || error_msg.contains("No such file"),
        "Error should indicate file not found: {}",
        error_msg
    );
}

// RED Test 3: Handler accepts position parameter
#[tokio::test]
async fn test_replay_accepts_position() {
    // This test verifies the handler accepts --position parameter
    // for jumping to a specific point in the recording

    // Create a temporary file to simulate a recording
    let temp_file = NamedTempFile::new().expect("Failed to create temp file");
    let recording = temp_file.path().to_path_buf();

    // Write minimal recording data
    std::fs::write(&recording, b"mock_recording_data").expect("Failed to write mock data");

    let position = Some(5);
    let result =
        pmat::cli::handlers::debug_handlers::handle_debug_replay(recording, position, false).await;

    // Handler should accept the position parameter
    // (may fail for invalid format, but shouldn't panic)
    assert!(
        result.is_ok() || result.is_err(),
        "Handler should process position parameter"
    );
}

// RED Test 4: Handler supports interactive mode
#[tokio::test]
async fn test_replay_interactive_mode() {
    // This test verifies the handler supports --interactive flag
    // for step-through debugging

    // Create a temporary file to simulate a recording
    let temp_file = NamedTempFile::new().expect("Failed to create temp file");
    let recording = temp_file.path().to_path_buf();

    // Write minimal recording data
    std::fs::write(&recording, b"mock_recording_data").expect("Failed to write mock data");

    let interactive = true;
    let result =
        pmat::cli::handlers::debug_handlers::handle_debug_replay(recording, None, interactive)
            .await;

    // Handler should accept the interactive parameter
    assert!(
        result.is_ok() || result.is_err(),
        "Handler should process interactive parameter"
    );
}

// RED Test 5: Handler displays Timeline UI output
#[tokio::test]
async fn test_replay_displays_timeline() {
    // This test verifies the handler integrates with Timeline UI
    // Sprint 72-73: Terminal-based visualization

    // Create a temporary file to simulate a recording
    let temp_file = NamedTempFile::new().expect("Failed to create temp file");
    let recording = temp_file.path().to_path_buf();

    // Write minimal recording data (should be valid format)
    std::fs::write(&recording, b"mock_recording_data").expect("Failed to write mock data");

    let result =
        pmat::cli::handlers::debug_handlers::handle_debug_replay(recording, None, false).await;

    // Handler should attempt to display Timeline UI
    // (may fail for invalid format, but function should exist)
    assert!(
        result.is_ok() || result.is_err(),
        "Handler should attempt to display timeline"
    );
}
