"""Format command handler for script runner."""

import argparse
import subprocess
import sys
from pathlib import Path


# TypeScript packages to format
TYPESCRIPT_PACKAGES = [
    "imagen-app",
    "react",
    "electron",
    "image-generation/types",
    "image-generation/client",
    "imagegen-assistant/types",
    "imagegen-assistant/client",
    "image-processing/types",
    "image-processing/service",
]

# Python services to format
PYTHON_SERVICES = [
    "imagegen-assistant/service",
    "image-generation/service",
    "image-pipeline",
    "image-compression",
]


def format_command(args, workspace_root: Path):
    """Format code with prettier and ruff.

    Args:
        args: Command-line arguments
        workspace_root: Path to workspace root

    Returns:
        Exit code (0 = success, non-zero = failure)
    """
    parser = argparse.ArgumentParser(
        prog="./run format",
        description="Format TypeScript and Python code",
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog="""
Examples:
  ./run format                # Format everything
  ./run format --ts           # Format only TypeScript packages
  ./run format --py           # Format only Python services
  ./run format --check        # Check formatting without modifying files

TypeScript formatter: prettier
Python formatter: ruff format
        """,
    )

    parser.add_argument(
        "--ts",
        "--typescript",
        action="store_true",
        dest="typescript",
        help="Format only TypeScript packages",
    )

    parser.add_argument(
        "--py",
        "--python",
        action="store_true",
        dest="python",
        help="Format only Python services",
    )

    parser.add_argument(
        "--check",
        action="store_true",
        help="Check formatting without modifying files",
    )

    parser.add_argument(
        "-v",
        "--verbose",
        action="store_true",
        help="Verbose output",
    )

    parsed_args = parser.parse_args(args)

    # If no flags, format both
    if not parsed_args.typescript and not parsed_args.python:
        parsed_args.typescript = True
        parsed_args.python = True

    print("@image workspace format\n")

    failed = []
    succeeded = []

    # Format TypeScript packages
    if parsed_args.typescript:
        print("TypeScript Packages")
        print("─" * 50)

        for pkg in TYPESCRIPT_PACKAGES:
            pkg_path = workspace_root / pkg

            if not pkg_path.exists():
                print(f"⊘ SKIP: {pkg} (directory not found)")
                continue

            # Check if package.json has format script
            package_json = pkg_path / "package.json"
            if not package_json.exists():
                print(f"⊘ SKIP: {pkg} (no package.json)")
                continue

            print(f"▶ Formatting: {pkg}")

            # Run prettier
            if parsed_args.check:
                format_cmd = ["npm", "run", "format:check"]
            else:
                format_cmd = ["npm", "run", "format"]

            result = subprocess.run(
                format_cmd,
                cwd=pkg_path,
                capture_output=not parsed_args.verbose,
                check=False,
            )

            if result.returncode == 0:
                print(f"✓ PASS: {pkg}")
                succeeded.append(f"ts:{pkg}")
            else:
                print(f"✗ FAIL: {pkg}")
                if not parsed_args.verbose and result.stdout:
                    output = result.stdout.decode()[:300]
                    print(f"  {output}")
                failed.append(f"ts:{pkg}")

            print()

        print()

    # Format Python services
    if parsed_args.python:
        print("Python Services")
        print("─" * 50)

        for service in PYTHON_SERVICES:
            service_path = workspace_root / service

            if not service_path.exists():
                print(f"⊘ SKIP: {service} (directory not found)")
                continue

            print(f"▶ Formatting: {service}")

            # Run ruff format
            format_cmd = ["ruff", "format", "."]
            if parsed_args.check:
                format_cmd.append("--check")

            result = subprocess.run(
                format_cmd,
                cwd=service_path,
                capture_output=not parsed_args.verbose,
                check=False,
            )

            if result.returncode == 0:
                print(f"✓ PASS: {service}")
                succeeded.append(f"py:{service}")
            else:
                print(f"✗ FAIL: {service}")
                if not parsed_args.verbose and result.stdout:
                    output = result.stdout.decode()[:300]
                    print(f"  {output}")
                failed.append(f"py:{service}")

            print()

        print()

    # Summary
    total = len(succeeded) + len(failed)
    print("─" * 50)
    print(f"Formatted: {len(succeeded)}/{total} succeeded")

    if failed:
        print(f"\nFailed:")
        for item in failed:
            print(f"  ✗ {item}")
        return 1

    if parsed_args.check:
        print("\n✓ All files properly formatted")
    else:
        print("\n✓ All files formatted successfully")

    return 0


def register_format_command(runner):
    """Register the format command with the script runner.

    Args:
        runner: ScriptRunner instance
    """
    runner.register_command(
        "format",
        format_command,
        "Format code with prettier and ruff",
    )