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# Exception: assets/glyphs.json contains rasterized glyph data derived from
# Noto Sans CJK JP (SIL Open Font License 1.1). See assets/NOTO-LICENSE.txt.
# Pyxel is an external dependency under its own MIT license.

"""最後の一匹・教材 2/5：距離と張力を分ける。
原作を簡略化した独立実行ファイル。実行: python 02_meters.py
01〜04はメーター観察の練習、05は小魚1匹を釣るゲームです。
日本語フォント素材は使わず、標準フォントと図形だけで描きます。
"""

WIDTH, HEIGHT = 280, 210
FPS = 30


class Game:
    def __init__(self):
        self.distance = 70.0
        self.held = False
        self.reeled = 0
        self.released = 0
        self.tension = 20.0

    def step(self, held=False):
        self.held = held
        # btnでは長押しを読む。離したフレームで反対のカウンターを0にする。
        self.reeled = self.reeled + 1 if held else 0
        self.released = 0 if held else self.released + 1
        if held:
            self.distance -= 0.42
            self.tension += 0.60
        else:
            self.distance += 0.45
            self.tension = max(0.0, self.tension - 1.30)

        # 01〜04は練習用。端に来ても終了せずメーターを範囲内に止める。
        self.distance = max(0.0, min(100.0, self.distance))
        self.tension = min(100.0, self.tension)


def main(headless=False, screenshot=None):
    # importしてGameを試すだけならPyxelは不要。描画のときだけ読み込む。
    import pyxel
    from pathlib import Path

    # Pyxel初期化より前に、呼び出した場所からの保存先を確定する。
    if screenshot:
        screenshot = str(Path(screenshot).expanduser().resolve())
    game = Game()
    frames = 0
    screenshot_saved = False

    def update():
        nonlocal game, frames
        # 12回の更新と12回の描画の後、次の更新で終了する。
        if headless and frames >= 12:
            pyxel.quit()
            return
        frames += 1
        if pyxel.btnp(pyxel.KEY_R):
            game = Game()
            return
        game.step(pyxel.btn(pyxel.KEY_SPACE))

    def bar(y, label, value, color):
        shown = max(0.0, min(100.0, value))
        pyxel.text(10, y, label, 7)
        pyxel.rect(64, y, 164, 7, 0)
        pyxel.rect(65, y + 1, int(shown * 1.62), 5, color)
        pyxel.text(237, y, f"{shown:5.1f}", color)

    def draw():
        nonlocal screenshot_saved
        pyxel.cls(1)
        pyxel.text(10, 8, "THE LAST FISH / STEP 2", 10)
        pyxel.text(10, 19, "PRACTICE: METERS DO NOT END THE GAME", 6)
        pyxel.text(10, 35, "SPACE: " + ("HELD / REEL" if game.held else "RELEASED / SLACK"), 7)
        pyxel.text(10, 46, f"HELD {game.reeled:3}f   RELEASED {game.released:3}f", 6)
        bar(60, "DIST", game.distance, 12)
        bar(74, "TENSION", game.tension, 8 if game.tension >= 75 else 10)
        # 距離が0なら岸側、100なら画面右。状態の計算はここでしない。
        x = 54 + max(0.0, min(100.0, game.distance)) * 1.90
        pyxel.rect(0, 134, WIDTH, 38, 5)
        pyxel.line(0, 140, WIDTH - 1, 140, 6)
        pyxel.rect(0, 131, 38, 9, 4)
        pyxel.line(24, 133, 42, 122, 9)
        pyxel.line(42, 122, x, 151, 7)
        pyxel.elli(x - 9, 146, 18, 10, 10)
        pyxel.tri(x + 8, 151, x + 16, 145, x + 16, 157, 10)
        pyxel.pset(x - 5, 149, 0)
        pyxel.text(10, 104, "ONE BUTTON, TWO DIFFERENT ACTIONS", 10)
        pyxel.text(10, 178, "R RESTARTS THE SAME PRACTICE", 6)
        pyxel.text(10, 196, "SPACE: REEL   R: RESET   ESC: QUIT", 6)
        # 12回目に描いた本物のPyxel画面を保存。自動プレイ画像ではない。
        if screenshot and frames >= 12 and not screenshot_saved:
            pyxel.screenshot(screenshot, scale=2)
            screenshot_saved = True

    pyxel.init(WIDTH, HEIGHT, title="The Last Fish - Stage 2", fps=FPS, headless=headless)
    pyxel.run(update, draw)


if __name__ == "__main__":
    import argparse

    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument("--headless-smoke", action="store_true", help="Render 12 real Pyxel frames then quit; not a full playtest")
    parser.add_argument("--screenshot", metavar="PATH", help="Save the 12th rendered frame as a PNG")
    args = parser.parse_args()
    main(headless=args.headless_smoke, screenshot=args.screenshot)