#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""UI 全局主题批小位图生成脚本（迭代 25 T0，2026-10-13）。

产出（→ game/assets/art/ui/gen/，纯色/几何、像素风）：
  slider_grabber.png            滑轨柄·常   12×12 CANDLE #F6C667 + PANEL_BORDER #786E58 1px 描边
  slider_grabber_highlight.png  滑轨柄·悬   12×12 CANDLE 提亮档(lightened≈12%) + 同描边
  slider_grabber_disabled.png   滑轨柄·废   12×12 STONE_DEEP #554D41 + 同描边
  spinbox_updown.png            SpinBox 箭头 16×16 INK #33261B ▲▼ 合一（Godot 4 SpinBox 走 updown 合并图标槽）
  option_arrow.png              OptionButton 箭头 8×8 INK 向下三角
  checkbox_unchecked.png            勾选框·空 14×14 PANEL_DATA #E9D9B8 + PANEL_BORDER 边
  checkbox_checked.png              勾选框·选 14×14 同底边 + INK 对勾
  checkbox_unchecked_disabled.png   勾选框·空·废 14×14 同底 + STONE_DEEP 边
  checkbox_checked_disabled.png     勾选框·选·废 14×14 同底边 + STONE_DEEP 对勾

色值全部取自 game/presentation/views/ui_kit.gd 既有常量（溯源表见 game/assets/theme/README.md）——
不新增美术素材、不动美术圣经 §7（迭代 25 契约）。滚动条柄不走位图：Godot 4 ScrollBar 的
grabber 是 StyleBox（非 Icon），纯色 StyleBoxFlat 直接承载（见 main_theme.tres）。

♻ 可重跑：本脚本幂等，重复执行覆盖产出；改色值只改本脚本顶部常量后重跑 + 重导。
用法: python tools/gen_theme_icons.py
"""
import os

from PIL import Image

ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
OUT = os.path.join(ROOT, "game", "assets", "art", "ui", "gen")

# ── 色值（↔ ui_kit.gd 常量，冻结）────────────────────────────────────────────
INK = (51, 38, 27)            # INK #33261B
PANEL_DATA = (233, 217, 184)  # PANEL_DATA #E9D9B8
PANEL_BORDER = (120, 110, 88)  # PANEL_BORDER #786E58
STONE_DEEP = (85, 77, 65)     # STONE_DEEP #554D41
CANDLE = (246, 198, 103)      # CANDLE #F6C667


def lighten(c, amount=0.12):
    """复刻 Godot Color.lightened：每通道 + (255-通道)×amount（sRGB 存储值域）"""
    return tuple(min(255, round(v + (255 - v) * amount)) for v in c)


def save(img, name):
    path = os.path.join(OUT, name)
    img.save(path)
    print("wrote %s (%dx%d)" % (name, img.width, img.height))


def slider_grabber(fill):
    """12×12 方柄：fill 实心 + PANEL_BORDER 1px 描边"""
    img = Image.new("RGBA", (12, 12), (0, 0, 0, 0))
    for x in range(12):
        for y in range(12):
            edge = x in (0, 11) or y in (0, 11)
            img.putpixel((x, y), PANEL_BORDER + (255,) if edge else fill + (255,))
    return img


def spinbox_updown():
    """16×16 ▲▼ 合一：上三角 y2-7、下三角 y9-14，各宽 12（INK）"""
    img = Image.new("RGBA", (16, 16), (0, 0, 0, 0))
    # 上三角：顶行中心 2px（x7-8），第 6 行满宽 x2-13
    for row in range(6):
        half = 1 + row  # 第 row 行左右各扩 1
        for x in range(8 - half, 8 + half):
            img.putpixel((x, 2 + row), INK + (255,))
    # 下三角：镜像（第 row 行满宽在底）
    for row in range(6):
        half = 6 - row
        for x in range(8 - half, 8 + half):
            img.putpixel((x, 9 + row), INK + (255,))
    return img


def option_arrow():
    """8×8 向下三角（OptionButton 箭头）"""
    img = Image.new("RGBA", (8, 8), (0, 0, 0, 0))
    for row in range(5):
        half = row + 1
        for x in range(4 - half, 4 + half - 1):
            img.putpixel((x, 1 + row), INK + (255,))
    return img


def checkbox(border, mark):
    """14×14 勾选框：PANEL_DATA 底 + 1px 边；mark 非 None 时画 2px 对勾"""
    img = Image.new("RGBA", (14, 14), (0, 0, 0, 0))
    for x in range(14):
        for y in range(14):
            edge = x in (0, 13) or y in (0, 13)
            img.putpixel((x, y), border + (255,) if edge else PANEL_DATA + (255,))
    if mark is not None:
        # 对勾：(3,7)→(6,10)→(11,3)，2px 粗（内区 1..12）
        seg = [(3, 7), (4, 7), (4, 8), (5, 8), (5, 9), (6, 9),
               (6, 10), (7, 10), (7, 11), (8, 11), (8, 10), (9, 10),
               (9, 9), (10, 9), (10, 8), (11, 8),
               (11, 7), (10, 7), (10, 6), (9, 6), (9, 5), (8, 5),
               (8, 4), (7, 4), (7, 3), (6, 3)]
        for (x, y) in seg:
            if 1 <= x <= 12 and 1 <= y <= 12:
                img.putpixel((x, y), mark + (255,))
    return img


def main():
    os.makedirs(OUT, exist_ok=True)
    save(slider_grabber(CANDLE), "slider_grabber.png")
    save(slider_grabber(lighten(CANDLE)), "slider_grabber_highlight.png")
    save(slider_grabber(STONE_DEEP), "slider_grabber_disabled.png")
    save(spinbox_updown(), "spinbox_updown.png")
    save(option_arrow(), "option_arrow.png")
    save(checkbox(PANEL_BORDER, None), "checkbox_unchecked.png")
    save(checkbox(PANEL_BORDER, INK), "checkbox_checked.png")
    save(checkbox(STONE_DEEP, None), "checkbox_unchecked_disabled.png")
    save(checkbox(STONE_DEEP, STONE_DEEP), "checkbox_checked_disabled.png")
    print("done → %s" % OUT)


if __name__ == "__main__":
    main()