from __future__ import annotations

import argparse
import json
import sys
from pathlib import Path


BACKEND_ROOT = Path(__file__).resolve().parents[1]
if str(BACKEND_ROOT) not in sys.path:
    sys.path.insert(0, str(BACKEND_ROOT))

from app.core.config import Settings  # noqa: E402
from app.services.yolo_preflight_service import YoloPreflightService  # noqa: E402


def main() -> int:
    parser = argparse.ArgumentParser(description="Run local YOLO configuration preflight without running inference.")
    parser.add_argument("--model-path", help="Existing local YOLO model path.")
    parser.add_argument("--tile-manifest-path", help="Existing raster tile manifest path.")
    parser.add_argument("--enabled", action="store_true", help="Treat YOLO as enabled for this preflight.")
    parser.add_argument("--max-tiles", type=int, help="Maximum tile count allowed by preflight.")
    parser.add_argument(
        "--assume-dependencies",
        action="store_true",
        help="Skip checking installed ultralytics/torch packages; useful for validating local paths on non-AI machines.",
    )
    parser.add_argument(
        "--check-model-load",
        action="store_true",
        help="Explicitly load the configured local model file to verify Ultralytics compatibility; no inference is run.",
    )
    parser.add_argument("--json", action="store_true", help="Print JSON output only.")
    args = parser.parse_args()
    if args.check_model_load and args.assume_dependencies:
        parser.error("--check-model-load cannot be combined with --assume-dependencies")

    settings = Settings()
    settings_updates = {}
    if args.enabled or args.model_path:
        settings_updates["yolo_enabled"] = True
    if args.model_path:
        settings_updates["yolo_model_path"] = args.model_path
    if args.max_tiles is not None:
        settings_updates["yolo_max_tiles"] = args.max_tiles
    if settings_updates:
        settings = settings.model_copy(update=settings_updates)
    payload = YoloPreflightService.run(
        settings=settings,
        tile_manifest_path=args.tile_manifest_path,
        assume_dependencies=args.assume_dependencies,
        check_model_load=args.check_model_load,
    )

    if args.json:
        print(json.dumps(payload, indent=2, sort_keys=True))
    else:
        print("GeoIntel YOLO preflight")
        print(json.dumps(payload, indent=2, sort_keys=True))
    return 0 if payload["status"] in {"ready", "not_configured", "dependency_unavailable"} else 1


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