#!/usr/bin/env python3
"""List Gitea pull requests.

Usage:
    list_prs.py --remote dadeschools
"""
import os
import sys
import argparse

# Auto-execute using the project's local virtual environment Python
PROJECT_ROOT = os.path.dirname(os.path.abspath(__file__))
venv_python = os.path.join(PROJECT_ROOT, "venv", "bin", "python3")
if os.path.exists(venv_python) and sys.executable != venv_python:
    os.execv(venv_python, [venv_python] + sys.argv)

from gitea_auth import get_auth_header, resolve_remote, add_remote_args, api_request, repo_api_url


def main(argv=None):
    parser = argparse.ArgumentParser(description="List Gitea pull requests.")
    add_remote_args(parser)
    parser.add_argument("--state", choices=["open", "closed", "all"], default="open",
                        help="Filter by PR state (default: open).")
    args = parser.parse_args(argv)

    host, org, repo = resolve_remote(args)
    auth = get_auth_header(host)
    if not auth:
        print(f"Could not get credentials or token for {host}.", file=sys.stderr)
        return 1

    url = f"{repo_api_url(host, org, repo)}/pulls?state={args.state}"

    try:
        prs = api_request("GET", url, auth)
        if not prs:
            print("No pull requests found.")
            return 0

        for pr in prs:
            merge_status = "Mergeable" if pr.get("mergeable") else "Conflicted/Not Mergeable"
            print(f"PR #{pr['number']}: {pr['title']}")
            print(f"  Branch: {pr['head']['ref']} -> {pr['base']['ref']} ({merge_status})")
            print(f"  URL: {pr['html_url']}")
        return 0
    except Exception as e:
        print(f"Error listing PRs: {e}", file=sys.stderr)
        return 1


if __name__ == "__main__":
    sys.exit(main())