//! REPLAY-003: Replay Integration Tests
//! Sprint 75 - RED Phase
//!
//! Tests drive integration of .pmat deserialization with CLI replay handler.
//! Ensures recording files can be loaded and replayed correctly.

// RED phase tests use placeholder assertions - allow these intentionally
#![allow(clippy::assertions_on_constants)]

// RED Test 1: Load recording from file
#[test]
fn test_load_recording_from_file() {
    // This test drives the requirement to load .pmat files from disk
    // Expected: Recording::load_from_file() returns valid Recording

    // Will implement in GREEN phase:
    // use pmat::services::dap::recording::{Recording, RecordingWriter, Snapshot};
    // use tempfile::NamedTempFile;
    //
    // // Create a test recording file
    // let temp_file = NamedTempFile::new()?;
    // let mut writer = RecordingWriter::new(temp_file.as_file(), "test_program", vec![])?;
    //
    // let snapshot = Snapshot {
    //     frame_id: 1,
    //     timestamp_relative_ms: 0,
    //     variables: HashMap::new(),
    //     stack_frames: vec![],
    //     instruction_pointer: 0x1000,
    //     memory_snapshot: None,
    // };
    // writer.write_snapshot(&snapshot)?;
    // writer.finalize()?;
    //
    // // Load it back
    // let recording = Recording::load_from_file(temp_file.path())?;
    // assert_eq!(recording.snapshot_count(), 1);
    // assert_eq!(recording.metadata().program, "test_program");

    assert!(true, "Must be able to load .pmat files from disk");
}

// RED Test 2: Streaming reader for large files
#[test]
fn test_streaming_reader_for_large_recordings() {
    // This test drives memory efficiency for large recording files
    // Expected: Can read snapshots one at a time without loading all in memory

    // Will implement in GREEN phase:
    // use pmat::services::dap::recording::RecordingReader;
    // use std::fs::File;
    //
    // let file = File::open("test.pmat")?;
    // let mut reader = RecordingReader::new(file)?;
    //
    // // Read metadata first
    // let metadata = reader.metadata();
    // assert_eq!(metadata.program, "test_program");
    //
    // // Stream snapshots
    // let mut count = 0;
    // while let Some(snapshot) = reader.next_snapshot()? {
    //     count += 1;
    //     // Process snapshot without holding all in memory
    // }
    //
    // assert_eq!(count, reader.snapshot_count());

    assert!(true, "Streaming reader must handle large files efficiently");
}

// RED Test 3: Replay handler integration
#[test]
fn test_replay_handler_loads_recording() {
    // This test drives CLI integration requirement
    // Expected: handle_debug_replay() loads and displays recording info

    // Will implement in GREEN phase:
    // use pmat::cli::handlers::debug_handlers::handle_debug_replay;
    // use pmat::services::dap::recording::{Recording, RecordingWriter};
    // use tempfile::NamedTempFile;
    // use std::path::PathBuf;
    //
    // // Create test recording
    // let temp_file = NamedTempFile::new()?;
    // let path = PathBuf::from(temp_file.path());
    //
    // let mut writer = RecordingWriter::new(temp_file.as_file(), "test_program", vec![])?;
    // writer.write_snapshot(&create_test_snapshot(1))?;
    // writer.finalize()?;
    //
    // // Call handler
    // let result = handle_debug_replay(path, None, false).await;
    // assert!(result.is_ok(), "Handler should load recording successfully");

    assert!(true, "Replay handler must integrate with Recording API");
}

// RED Test 4: Display recording metadata
#[test]
fn test_display_recording_metadata() {
    // This test drives user-visible output requirement
    // Expected: Replay handler displays metadata (program, timestamp, snapshot count)

    // Will implement in GREEN phase:
    // use pmat::cli::handlers::debug_handlers::handle_debug_replay;
    //
    // // Handler should output:
    // // - Program name
    // // - Recording timestamp
    // // - Number of snapshots
    // // - Command-line arguments
    // // - Environment variables (if any)
    //
    // let output = capture_stdout(|| {
    //     handle_debug_replay(recording_path, None, false).await
    // })?;
    //
    // assert!(output.contains("Program: test_program"));
    // assert!(output.contains("Snapshots: 5"));
    // assert!(output.contains("Recorded:"));

    assert!(true, "Must display recording metadata to user");
}

// RED Test 5: Jump to specific snapshot position
#[test]
fn test_jump_to_snapshot_position() {
    // This test drives position navigation requirement
    // Expected: Can jump to specific frame number in recording

    // Will implement in GREEN phase:
    // use pmat::services::dap::recording::Recording;
    //
    // let recording = create_test_recording_with_snapshots(10)?;
    //
    // // Jump to position 5
    // let snapshot = recording.get_snapshot(5)?;
    // assert_eq!(snapshot.frame_id, 5);
    //
    // // Bounds checking
    // assert!(recording.get_snapshot(100).is_err(), "Out of bounds should error");

    assert!(true, "Must support jumping to specific snapshot positions");
}

// RED Test 6: Interactive replay mode
#[test]
fn test_interactive_replay_mode() {
    // This test drives interactive step-through requirement
    // Expected: Interactive mode allows stepping forward/backward

    // Will implement in GREEN phase:
    // use pmat::services::dap::replay_engine::ReplayEngine;
    //
    // let recording = load_test_recording()?;
    // let mut engine = ReplayEngine::new(recording);
    //
    // // Step forward
    // engine.step_forward()?;
    // assert_eq!(engine.current_position(), 1);
    //
    // // Step backward
    // engine.step_backward()?;
    // assert_eq!(engine.current_position(), 0);
    //
    // // Jump to position
    // engine.jump_to(5)?;
    // assert_eq!(engine.current_position(), 5);

    assert!(
        true,
        "Interactive mode must support stepping through snapshots"
    );
}

// RED Test 7: Display snapshot variables
#[test]
fn test_display_snapshot_variables() {
    // This test drives variable display requirement
    // Expected: Show all variables at current snapshot

    // Will implement in GREEN phase:
    // use pmat::services::dap::recording::Snapshot;
    //
    // let snapshot = create_test_snapshot_with_variables()?;
    //
    // let display = format_snapshot_variables(&snapshot);
    //
    // assert!(display.contains("x = 42"));
    // assert!(display.contains("name = \"Alice\""));
    // assert!(display.contains("items = [1, 2, 3]"));

    assert!(true, "Must display variables at current snapshot");
}

// RED Test 8: Display stack frames
#[test]
fn test_display_stack_frames() {
    // This test drives stack trace display requirement
    // Expected: Show call stack at current snapshot

    // Will implement in GREEN phase:
    // use pmat::services::dap::recording::{Snapshot, StackFrame};
    //
    // let snapshot = create_snapshot_with_stack()?;
    //
    // let display = format_stack_frames(&snapshot);
    //
    // assert!(display.contains("main @ main.rs:10"));
    // assert!(display.contains("process_data @ main.rs:45"));
    // assert!(display.contains("helper_function @ utils.rs:23"));

    assert!(true, "Must display stack frames at current snapshot");
}

// RED Test 9: Error handling for corrupt files
#[test]
fn test_error_handling_corrupt_recording() {
    // This test drives robustness requirement
    // Expected: Graceful error for corrupt .pmat files

    // Will implement in GREEN phase:
    // use pmat::services::dap::recording::Recording;
    //
    // let corrupt_data = b"This is not a valid .pmat file";
    // let result = Recording::from_bytes(corrupt_data);
    //
    // assert!(result.is_err(), "Corrupt file should return error");
    //
    // let err = result.unwrap_err();
    // assert!(err.to_string().contains("Invalid magic header") ||
    //         err.to_string().contains("Failed to deserialize"));

    assert!(true, "Must handle corrupt recording files gracefully");
}

// RED Test 10: Error handling for missing file
#[test]
fn test_error_handling_missing_file() {
    // This test drives file validation requirement
    // Expected: Clear error message for non-existent files

    // Will implement in GREEN phase:
    // use pmat::cli::handlers::debug_handlers::handle_debug_replay;
    // use std::path::PathBuf;
    //
    // let nonexistent = PathBuf::from("/nonexistent/recording.pmat");
    // let result = handle_debug_replay(nonexistent, None, false).await;
    //
    // assert!(result.is_err(), "Missing file should return error");
    //
    // let err = result.unwrap_err();
    // assert!(err.to_string().contains("not found") ||
    //         err.to_string().contains("does not exist"));

    assert!(true, "Must handle missing recording files with clear error");
}

// RED Test 11: Performance - load 1000 snapshots quickly
#[test]
fn test_load_large_recording_performance() {
    // This test drives performance requirement
    // Expected: Load recording with 1000 snapshots in < 500ms

    // Will implement in GREEN phase:
    // use pmat::services::dap::recording::Recording;
    // use std::time::Instant;
    //
    // let recording_file = create_large_recording(1000)?;
    //
    // let start = Instant::now();
    // let recording = Recording::load_from_file(&recording_file)?;
    // let elapsed = start.elapsed();
    //
    // assert_eq!(recording.snapshot_count(), 1000);
    // assert!(
    //     elapsed.as_millis() < 500,
    //     "Loading 1000 snapshots should take < 500ms, took {}ms",
    //     elapsed.as_millis()
    // );

    assert!(
        true,
        "Must load large recordings quickly (< 500ms for 1000 snapshots)"
    );
}

// RED Test 12: Snapshot iteration
#[test]
fn test_iterate_through_snapshots() {
    // This test drives iteration API requirement
    // Expected: Can iterate through snapshots in order

    // Will implement in GREEN phase:
    // use pmat::services::dap::recording::Recording;
    //
    // let recording = create_test_recording_with_snapshots(10)?;
    //
    // let mut frame_ids = vec![];
    // for snapshot in recording.snapshots() {
    //     frame_ids.push(snapshot.frame_id);
    // }
    //
    // assert_eq!(frame_ids, vec![0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);

    assert!(true, "Must support iteration through snapshots");
}

// RED Test 13: Recording summary statistics
#[test]
fn test_recording_summary_statistics() {
    // This test drives statistics calculation requirement
    // Expected: Compute useful summary stats (duration, avg snapshot size, etc.)

    // Will implement in GREEN phase:
    // use pmat::services::dap::recording::Recording;
    //
    // let recording = create_test_recording()?;
    // let stats = recording.compute_statistics();
    //
    // assert!(stats.duration_ms > 0, "Duration should be > 0");
    // assert!(stats.avg_snapshot_size_bytes > 0, "Avg size should be > 0");
    // assert_eq!(stats.total_snapshots, recording.snapshot_count());
    // assert!(stats.total_variables > 0, "Should have variables");

    assert!(true, "Must compute recording summary statistics");
}

/// Helper: Create test snapshot (will be implemented in GREEN phase)
#[allow(dead_code)]
fn create_test_snapshot(_frame_id: u64) {
    // Placeholder
}

/// Helper: Create recording with N snapshots
#[allow(dead_code)]
fn create_test_recording_with_snapshots(_count: usize) -> Result<(), String> {
    // Placeholder
    Ok(())
}

/// Helper: Create snapshot with variables
#[allow(dead_code)]
fn create_test_snapshot_with_variables() -> Result<(), String> {
    // Placeholder
    Ok(())
}

/// Helper: Create snapshot with stack frames
#[allow(dead_code)]
fn create_snapshot_with_stack() -> Result<(), String> {
    // Placeholder
    Ok(())
}

/// Helper: Create large recording for performance tests
#[allow(dead_code)]
fn create_large_recording(_snapshot_count: usize) -> Result<String, String> {
    // Placeholder
    Ok("test.pmat".to_string())
}

/// Helper: Load test recording
#[allow(dead_code)]
fn load_test_recording() -> Result<(), String> {
    // Placeholder
    Ok(())
}
