#!/usr/bin/env python3
"""
GitHub Repository Intelligence Analyzer — CLI
─────────────────────────────────────────────
Usage examples:

  # Analyze repos from command line
  python cli.py https://github.com/c2siorg/Webiu https://github.com/django/django

  # Read URLs from a file (one per line)
  python cli.py --file repos.txt

  # Save JSON output
  python cli.py --file repos.txt --json output.json

  # Use a GitHub token (recommended — raises rate limit from 60 to 5000 req/hr)
  python cli.py --file repos.txt --token ghp_xxxxxxxxxxxx
"""

import argparse
import os
import sys

# Allow running from project root
sys.path.insert(0, os.path.dirname(__file__))

from src.analyzer import GitHubClient, analyze_repo
from src.reporter import format_report, format_summary_table, to_json


def main():
    parser = argparse.ArgumentParser(
        description="Analyze GitHub repositories for activity, complexity, and learning difficulty.",
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog=__doc__,
    )
    parser.add_argument(
        "repos",
        nargs="*",
        metavar="URL",
        help="GitHub repository URLs to analyze",
    )
    parser.add_argument(
        "--file", "-f",
        metavar="FILE",
        help="Text file with one GitHub URL per line",
    )
    parser.add_argument(
        "--token", "-t",
        metavar="TOKEN",
        default=os.environ.get("GITHUB_TOKEN"),
        help="GitHub personal access token (or set GITHUB_TOKEN env var)",
    )
    parser.add_argument(
        "--json", "-j",
        metavar="OUTPUT",
        help="Save full JSON report to this file path",
    )
    parser.add_argument(
        "--no-summary",
        action="store_true",
        help="Skip the summary table at the end",
    )
    args = parser.parse_args()

    # Collect URLs
    urls = list(args.repos)
    if args.file:
        try:
            with open(args.file) as f:
                file_urls = [
                    line.strip()
                    for line in f
                    if line.strip() and not line.startswith("#")
                ]
            urls.extend(file_urls)
        except FileNotFoundError:
            print(f"❌ File not found: {args.file}")
            sys.exit(1)

    if not urls:
        parser.print_help()
        print("\n⚠️  No URLs provided. Pass URLs as arguments or use --file.")
        sys.exit(1)

    # Auth
    client = GitHubClient(token=args.token)
    if not args.token:
        print("⚠️  No GitHub token provided. Rate limit: 60 req/hour.")
        print("   Set GITHUB_TOKEN or use --token to increase to 5000 req/hour.\n")

    print(f"🔍 Analyzing {len(urls)} repository/repositories...\n")

    reports = []
    for i, url in enumerate(urls, 1):
        print(f"  [{i}/{len(urls)}] {url}")
        report = analyze_repo(url, client)
        reports.append(report)
        print(format_report(report))

    # Summary table
    if not args.no_summary and len(reports) > 1:
        print("\n📋 Summary")
        print(format_summary_table(reports))

    # JSON export
    if args.json:
        json_output = to_json(reports)
        with open(args.json, "w") as f:
            f.write(json_output)
        print(f"\n✅ JSON report saved to: {args.json}")

    print(f"\n✅ Done. Analyzed {len(reports)} repo(s).")


if __name__ == "__main__":
    main()