#!/usr/bin/env python3
"""把 TUI 渲染结果输出到终端，用于检查排版与配色。

不进入交互循环，也不读取键盘——只是把某一时刻的完整画面画出来。

用法：
    python tools/preview_tui.py                  # 使用默认的中等规模农场（本地引擎）
    python tools/preview_tui.py --width 100      # 指定终端宽度
    python tools/preview_tui.py --color          # 输出带 ANSI 颜色
    python tools/preview_tui.py --scene empty    # 初始状态
    python tools/preview_tui.py --scene rich     # 后期大农场
    python tools/preview_tui.py --scene menu     # 播种菜单
    python tools/preview_tui.py --url http://127.0.0.1:8765 --farm alice
                                                 # 渲染**真实服务器**上的牧场
"""

from __future__ import annotations

import argparse
import contextlib
import io
import os
import random
import re
import sys

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from farm.engine import FarmEngine  # noqa: E402
from farm.tui import TuiApp         # noqa: E402

SCENES = ("empty", "mixed", "rich", "menu", "help")


def build_remote(url: str, farm: str, token: str | None) -> tuple[object, TuiApp]:
    """连到真实服务器，取一份现状来渲染。"""
    from farm.client import RemoteFarm

    client = RemoteFarm(endpoint=url, farm=farm, token=token, realtime=False)
    app = TuiApp(client, use_color=True, autosave=False,
                 server_label=f"{client.farm} @ {client.host}")
    return client, app


def build_engine(scene: str) -> tuple[FarmEngine, TuiApp]:
    random.seed(42)
    engine = FarmEngine(tick_seconds=15)
    app = TuiApp(engine, use_color=True, autosave=False)

    if scene == "empty":
        return engine, app

    # ---- 制造一个"进行中"的农场
    engine.state.level = 2
    engine.state.gold = 340
    engine.state.feed = 4
    engine.plant(1, "wheat")
    engine.water(1)
    engine.plant(2, "carrot")
    engine.plant(3, "wheat")
    engine.plant(4, "carrot")
    engine.advance_day()
    engine.advance_day()
    engine.buy_animal("chicken")
    engine.feed(1)

    if scene == "rich":
        engine.state.level = 4
        engine.state.gold = 2400
        engine.state.feed = 22
        for i in range(2):
            engine.state.gold = 99999
            engine.buy_plot()
        engine.plant(5, "corn")
        engine.plant(6, "tomato")
        engine.water(5)
        engine.state.gold = 2400
        engine.buy_animal("sheep")
        engine.buy_animal("cow")
        engine.advance_day()
        engine.advance_day()
        engine.add_log("收获 2 份小麦（丰收！），+31 金币", "good")
        engine.add_log("升级到 Lv.4！奖励 240 金币，解锁：南瓜", "good")

    if scene == "menu":
        # 找第一块空地，把播种菜单打开
        empty = next((p.index for p in engine.state.plots if p.is_empty), 0)
        app.plot_cursor = empty
        app._open_crop_menu()

    if scene == "help":
        app.mode = "help"

    return engine, app


def main() -> int:
    parser = argparse.ArgumentParser(description="渲染一帧 TUI 画面")
    parser.add_argument("--width", type=int, default=112, help="终端宽度")
    parser.add_argument("--height", type=int, default=32, help="终端高度")
    parser.add_argument("--scene", choices=SCENES, default="mixed", help="场景")
    parser.add_argument("--color", action="store_true", help="保留 ANSI 颜色")
    parser.add_argument("--url", default=None,
                        help="连到真实服务器渲染（例如 http://127.0.0.1:8765）")
    parser.add_argument("--farm", default="default", help="--url 模式下要看的牧场")
    parser.add_argument("--token", default=None, help="--url 模式下的访问令牌")
    args = parser.parse_args()

    os.environ["COLUMNS"] = str(args.width)
    os.environ["LINES"] = str(args.height)

    if args.url:
        engine, app = build_remote(args.url, args.farm, args.token)
        state = engine.snapshot()
        print(f"# 来自真实服务器 {args.url} · 牧场 {args.farm} · 第 {state.get('day')} 天 · "
              f"金币 {state.get('gold')} · 在线 {state.get('online')}\n")
    else:
        engine, app = build_engine(args.scene)
        # 预览脚本没有跑 Scheduler，这里手动给个倒计时，让画面更接近真实运行状态
        if engine.next_tick_at is None and not engine.paused:
            import time as _time

            engine.next_tick_at = _time.time() + 8.4

    app.use_color = args.color

    buffer = io.StringIO()
    with contextlib.redirect_stdout(buffer):
        app._render()

    output = buffer.getvalue()
    # 去掉清屏、光标控制与行尾清理符，预览里只保留可见内容
    output = re.sub(r"\x1b\[[0-9;?]*[A-Za-z]", "", output)
    print(output)
    return 0


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