//! PRD v1.0 additional command implementations (stubs)
//!
//! These are placeholder implementations for PRD v1.0 features.
//! Full implementations to be added as PRD requirements are finalized.

use crate::cli::types::OutputFormat;
use crate::error::{CleanroomError, Result};
use std::path::{Path, PathBuf};
use tracing::info;

/// Pull Docker images from test configurations
///
/// Scans test files for service definitions and pre-pulls images in parallel.
/// This is a re-export of the full implementation from the pull module.
pub async fn pull_images(paths: Option<Vec<PathBuf>>, parallel: bool, jobs: usize) -> Result<()> {
    // Delegate to the actual implementation in pull module
    super::pull::pull_images(paths, parallel, jobs).await
}

/// Visualize OpenTelemetry trace graph
///
/// Generates visual representation of span relationships.
/// This is a re-export of the full implementation from the graph module.
pub fn visualize_graph(
    trace: &Path,
    format: &crate::cli::types::GraphFormat,
    highlight_missing: bool,
    filter: Option<&str>,
) -> Result<()> {
    // Delegate to the actual implementation in graph module
    super::graph::visualize_graph(trace, format, highlight_missing, filter)
}

/// Reproduce a previous test run from baseline
///
/// Reruns tests and verifies results match recorded baseline.
///
/// # Arguments
/// * `baseline` - Path to baseline JSON file
/// * `verify_digest` - Whether to verify digest matches
/// * `output` - Optional output path for reproduction results
///
/// # Returns
/// * `Result<()>` - Success or error
///
/// # Errors
/// * Returns error if baseline file cannot be loaded
/// * Returns error if test execution fails
/// * Returns error if digest verification fails
pub async fn reproduce_baseline(
    baseline: &Path,
    verify_digest: bool,
    output: Option<&PathBuf>,
) -> Result<()> {
    use crate::cli::commands::record::{BaselineRecord, BaselineTestResult};
    use crate::cli::commands::run::run_tests_sequential_with_results;
    use crate::cli::types::{CliConfig, OutputFormat};

    info!(
        "🔄 Reproducing test run from baseline: {}",
        baseline.display()
    );
    info!("  Verify digest: {}", verify_digest);

    // 1. Load baseline file
    println!("📖 Loading baseline from: {}", baseline.display());
    let baseline_content = std::fs::read_to_string(baseline).map_err(|e| {
        CleanroomError::io_error(format!(
            "Failed to read baseline file '{}': {}",
            baseline.display(),
            e
        ))
    })?;

    let baseline_record: BaselineRecord = serde_json::from_str(&baseline_content).map_err(|e| {
        CleanroomError::serialization_error(format!(
            "Failed to parse baseline file '{}': {}",
            baseline.display(),
            e
        ))
    })?;

    println!(
        "   Version: {}, Timestamp: {}",
        baseline_record.version, baseline_record.timestamp
    );
    let digest_preview = if baseline_record.digest.len() > 16 {
        &baseline_record.digest[..16]
    } else {
        &baseline_record.digest
    };
    println!(
        "   Tests: {} (digest: {}...)",
        baseline_record.test_results.len(),
        digest_preview
    );

    // 2. Extract test file paths
    let test_paths: Vec<PathBuf> = baseline_record
        .test_results
        .iter()
        .map(|t| PathBuf::from(&t.file_path))
        .collect();

    if test_paths.is_empty() {
        return Err(CleanroomError::validation_error(
            "Baseline contains no test results to reproduce",
        ));
    }

    println!();
    println!("🔄 Re-running {} test(s)...", test_paths.len());
    println!();

    // 3. Rerun tests with same configuration (sequential, deterministic)
    let config = CliConfig {
        parallel: false, // Sequential for deterministic reproduction
        jobs: 1,
        format: OutputFormat::Auto,
        fail_fast: false,
        watch: false,
        verbose: 0,
        force: true,     // Force run all tests
        digest: false,   // No digest needed for reproduction
        validate: false, // No validation for baseline reproduction
    };

    let results = run_tests_sequential_with_results(&test_paths, &config).await?;

    // 4. Convert to baseline format for comparison
    let reproduction_results: Vec<BaselineTestResult> = results
        .iter()
        .map(|r| BaselineTestResult {
            name: r.name.clone(),
            passed: r.passed,
            duration_ms: r.duration_ms,
            file_path: extract_file_path_for_comparison(&r.name),
        })
        .collect();

    // 5. Compute digest of reproduction
    let repro_data = serde_json::json!({
        "timestamp": chrono::Utc::now().to_rfc3339(),
        "version": env!("CARGO_PKG_VERSION").to_string(),
        "test_results": reproduction_results,
    });

    let repro_digest = compute_sha256_for_comparison(&repro_data)?;

    // 6. Compare results
    println!();
    println!("📊 Comparison Results:");
    println!("   Baseline digest:      {}", baseline_record.digest);
    println!("   Reproduction digest:  {}", repro_digest);

    let mut differences = Vec::new();
    for (idx, (baseline_test, repro_test)) in baseline_record
        .test_results
        .iter()
        .zip(reproduction_results.iter())
        .enumerate()
    {
        if baseline_test.passed != repro_test.passed {
            differences.push(format!(
                "Test #{}: {} - baseline: {}, reproduction: {}",
                idx + 1,
                baseline_test.name,
                if baseline_test.passed {
                    "passed"
                } else {
                    "failed"
                },
                if repro_test.passed {
                    "passed"
                } else {
                    "failed"
                }
            ));
        }
    }

    // 7. Verify digest if requested
    if verify_digest {
        println!();
        if baseline_record.digest == repro_digest {
            println!("✅ Digest verification: PASSED");
            println!("   Test execution is deterministic and reproducible!");
        } else {
            println!("❌ Digest verification: FAILED");
            println!("   Test results differ from baseline!");

            if !differences.is_empty() {
                println!();
                println!("🔍 Differences found ({}):", differences.len());
                for diff in &differences {
                    println!("   • {}", diff);
                }
            }

            return Err(CleanroomError::validation_error(
                "Reproduction digest does not match baseline",
            ));
        }
    } else if !differences.is_empty() {
        println!();
        println!("⚠️  Differences found ({}):", differences.len());
        for diff in &differences {
            println!("   • {}", diff);
        }
    } else {
        println!();
        println!("✅ All tests produced the same results as baseline");
    }

    // 8. Write comparison results to output if specified
    if let Some(out) = output {
        let comparison_data = serde_json::json!({
            "baseline": {
                "file": baseline.display().to_string(),
                "digest": baseline_record.digest,
                "timestamp": baseline_record.timestamp,
                "version": baseline_record.version,
                "tests": baseline_record.test_results,
            },
            "reproduction": {
                "digest": repro_digest,
                "timestamp": chrono::Utc::now().to_rfc3339(),
                "version": env!("CARGO_PKG_VERSION").to_string(),
                "tests": reproduction_results,
            },
            "comparison": {
                "digest_match": baseline_record.digest == repro_digest,
                "differences": differences,
            }
        });

        let comparison_json = serde_json::to_string_pretty(&comparison_data).map_err(|e| {
            CleanroomError::internal_error(format!("Failed to serialize comparison results: {}", e))
        })?;

        std::fs::write(out, comparison_json).map_err(|e| {
            CleanroomError::io_error(format!(
                "Failed to write comparison results to '{}': {}",
                out.display(),
                e
            ))
        })?;

        println!();
        println!("📄 Comparison results written to: {}", out.display());
    }

    info!("Baseline reproduction completed successfully");
    Ok(())
}

/// Extract file path from test name for comparison
fn extract_file_path_for_comparison(test_name: &str) -> String {
    test_name.to_string()
}

/// Compute SHA-256 digest for comparison
fn compute_sha256_for_comparison(data: &serde_json::Value) -> Result<String> {
    use sha2::{Digest, Sha256};

    let json_bytes = serde_json::to_vec(data).map_err(|e| {
        CleanroomError::internal_error(format!("Failed to serialize data for hashing: {}", e))
    })?;

    let mut hasher = Sha256::new();
    hasher.update(&json_bytes);
    let result = hasher.finalize();

    Ok(format!("{:x}", result))
}

/// Run red/green TDD workflow validation
///
/// Validates that tests follow proper TDD cycle (red then green).
/// This is a re-export of the full implementation from the redgreen_impl module.
pub async fn run_red_green_validation(
    paths: &[PathBuf],
    verify_red: bool,
    verify_green: bool,
) -> Result<()> {
    use crate::cli::types::TddState;

    // Convert legacy flags to new API
    let expect = if verify_red {
        Some(TddState::Red)
    } else if verify_green {
        Some(TddState::Green)
    } else {
        None
    };

    // Delegate to the actual implementation in redgreen_impl module
    super::redgreen_impl::run_red_green_validation(paths, expect, verify_red, verify_green).await
}

/// Render Tera template with variable mappings
///
/// Renders a template file with user-provided variables.
pub fn render_template_with_vars(
    template: &Path,
    map: &[String],
    output: Option<&PathBuf>,
    show_vars: bool,
) -> Result<()> {
    info!("🎨 Rendering template: {}", template.display());
    info!("  Variable mappings: {:?}", map);
    info!("  Show vars: {}", show_vars);

    // Parse variable mappings from key=value format
    let mut vars = std::collections::HashMap::new();
    for mapping in map {
        let parts: Vec<&str> = mapping.splitn(2, '=').collect();
        if parts.len() == 2 {
            vars.insert(
                parts[0].to_string(),
                serde_json::Value::String(parts[1].to_string()),
            );
        } else {
            return Err(CleanroomError::validation_error(format!(
                "Invalid variable mapping: '{}' (expected key=value format)",
                mapping
            )));
        }
    }

    if show_vars {
        info!("📋 Resolved variables:");
        for (key, value) in &vars {
            info!("  {} = {}", key, value);
        }
    }

    // Use existing template renderer
    let rendered = crate::render_template_file(template, vars)?;

    // Write output or print to stdout
    if let Some(out) = output {
        std::fs::write(out, rendered)
            .map_err(|e| CleanroomError::io_error(format!("Failed to write output: {}", e)))?;
        info!("✓ Rendered template written to: {}", out.display());
    } else {
        println!("{}", rendered);
    }

    Ok(())
}

/// Filter and search OpenTelemetry spans
///
/// Searches span data with optional grep pattern and formatting.
/// This is a re-export of the full implementation from the spans module.
pub fn filter_spans(
    trace: &Path,
    grep: Option<&str>,
    format: &OutputFormat,
    show_attrs: bool,
    show_events: bool,
) -> Result<()> {
    // Delegate to the actual implementation in spans module
    super::spans::filter_spans(trace, grep, format, show_attrs, show_events)
}

/// Start local OTEL collector
///
/// Starts OpenTelemetry Collector container for local development.
/// This is a re-export of the full implementation from the collector module.
pub async fn start_collector(
    image: &str,
    http_port: u16,
    grpc_port: u16,
    detach: bool,
) -> Result<()> {
    // Delegate to the actual implementation in collector module
    super::collector::start_collector(image, http_port, grpc_port, detach).await
}

/// Stop local OTEL collector
///
/// Stops and optionally removes OpenTelemetry Collector container.
/// This is a re-export of the full implementation from the collector module.
pub async fn stop_collector(volumes: bool) -> Result<()> {
    // Delegate to the actual implementation in collector module
    super::collector::stop_collector(volumes).await
}

/// Show collector status
///
/// Displays status of local OpenTelemetry Collector.
/// This is a re-export of the full implementation from the collector module.
pub async fn show_collector_status() -> Result<()> {
    // Delegate to the actual implementation in collector module
    super::collector::show_collector_status().await
}

/// Show collector logs
///
/// Displays logs from OpenTelemetry Collector container.
/// This is a re-export of the full implementation from the collector module.
pub async fn show_collector_logs(lines: usize, follow: bool) -> Result<()> {
    // Delegate to the actual implementation in collector module
    super::collector::show_collector_logs(lines, follow).await
}
