"""Run from the project root: python claim_offer.py [--dry-run]."""
import argparse
import json
import sys
import time
from pathlib import Path

from automation.engine import Desktop, Matcher, Region, WorkflowError, load_flow
from automation.offers import MacGameDesktop, OfferRunner

ROOT = Path(__file__).resolve().parent


def main():
    parser = argparse.ArgumentParser(description='首页 → 特惠战令 → 一键领取 → 返回首页')
    parser.add_argument('--dry-run', action='store_true', help='只验证首页并显示计划，不点击')
    parser.add_argument('--region', nargs=4, type=int, metavar=('X', 'Y', 'WIDTH', 'HEIGHT'),
                        help='游戏内容区域在主屏幕截图中的像素坐标，不含标题栏')
    args = parser.parse_args()
    try:
        if sys.platform == 'darwin' and not args.region:
            desktop = MacGameDesktop()
            provider = desktop.region_for
            if not args.dry_run:
                desktop.activate()
        else:
            desktop = Desktop()
            if args.region:
                region = Region(*args.region)
            else:
                config = ROOT / 'local/region.json'
                if not config.is_file():
                    raise WorkflowError('请先用 main.py 校准游戏区域，或提供 --region。')
                region = Region(**json.loads(config.read_text(encoding='utf-8')))
            provider = lambda screenshot: region
        print('3 秒后开始；请保持游戏在前台。鼠标移到主屏幕左上角可紧急停止。', flush=True)
        time.sleep(3)
        runner = OfferRunner(desktop, Matcher(ROOT / 'assets'),
                             load_flow(ROOT / 'workflows/offer_claim.json'), provider)
        runner.run(args.dry_run)
        return 0
    except KeyboardInterrupt:
        print('已停止。', file=sys.stderr)
        return 130
    except Exception as exc:
        print('流程停止：' + str(exc), file=sys.stderr)
        return 1


if __name__ == '__main__':
    raise SystemExit(main())