"""Entry point: GUI by default, CLI when --cli is passed."""

from __future__ import annotations

import argparse
import sys
from typing import List

from .renderer import save_solution
from .slabs import SLABS, SLABS_BY_VALUE
from .solver import solve


def _cli(argv: List[str]) -> int:
    p = argparse.ArgumentParser(
        prog="sephiria_inv",
        description="Optimize Sephiria slab placement and render the result.",
    )
    p.add_argument(
        "--cli", action="store_true",
        help="Run in CLI mode (no GUI).",
    )
    p.add_argument(
        "-s", "--slab", action="append", default=[],
        help="Slab value to include. Use value (e.g. 'harvesting') with optional ':N' "
        "multiplier (e.g. 'harvesting:3'). Repeat as needed.",
    )
    p.add_argument(
        "--slots", type=int, default=34, help="Inventory slot count (18..60).",
    )
    p.add_argument("--seed", type=int, default=None)
    p.add_argument(
        "--time-limit", type=float, default=4.0,
        help="Solver time budget in seconds.",
    )
    p.add_argument(
        "-o", "--output", default="sephiria_layout.png",
        help="Output PNG path.",
    )
    p.add_argument(
        "--list", action="store_true",
        help="List known slab values and exit.",
    )
    p.add_argument(
        "--no-download", action="store_true",
        help="Skip CDN download (text-only render).",
    )
    p.add_argument(
        "--screenshot", default=None,
        help="Read slab list from a game screenshot (PNG/JPG).",
    )
    p.add_argument(
        "--bbox", default=None,
        help="Required with --screenshot. Pixel bbox of the inventory grid as "
        "'left,top,right,bottom'.",
    )
    args = p.parse_args(argv)

    if args.list:
        for s in SLABS:
            print(f"  {s.value:<16s} {s.ko_label:<6s} ({s.tier})")
        return 0

    basket: List[str] = []
    if args.screenshot:
        if not args.bbox:
            print("--screenshot 사용 시 --bbox 'l,t,r,b' 가 필요합니다.", file=sys.stderr)
            return 2
        try:
            l, t, r, b = (int(v) for v in args.bbox.split(","))
        except ValueError:
            print("--bbox 형식: left,top,right,bottom (정수)", file=sys.stderr)
            return 2
        from .screenshot import recognize, recognized_values
        recs = recognize(args.screenshot, (l, t, r, b), slot_num=args.slots)
        basket.extend(recognized_values(recs))
        print(f"인식된 석판: {len(basket)}개 from screenshot")
    for raw in args.slab:
        if ":" in raw:
            v, n = raw.split(":", 1)
            try:
                count = int(n)
            except ValueError:
                print(f"잘못된 개수: {raw}", file=sys.stderr)
                return 2
        else:
            v, count = raw, 1
        if v not in SLABS_BY_VALUE:
            print(f"알 수 없는 석판 value: {v} (use --list)", file=sys.stderr)
            return 2
        basket.extend([v] * count)

    if not basket:
        print("최소 하나 이상의 --slab 을 지정하세요.", file=sys.stderr)
        return 2

    sol = solve(basket, slot_num=args.slots, time_limit=args.time_limit, seed=args.seed)
    save_solution(sol, args.output, download=not args.no_download)
    print(f"score={sol.score} placed={len(sol.placements)} → {args.output}")
    return 0


def main(argv: List[str] | None = None) -> int:
    argv = list(argv if argv is not None else sys.argv[1:])
    if "--cli" in argv or "--list" in argv or any(a.startswith("-s") or a.startswith("--slab") for a in argv):
        return _cli(argv)
    # Fall back to GUI
    from .gui import main as gui_main
    return gui_main()


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