/** 原始图片文件清单。只缓存文件；是否进内存仍由两关需求决定。 */
export function allBlockTexturePaths(): string[] {
    const paths: string[] = [];
    for (let shape = 0; shape < 23; shape++) {
        for (let color = 0; color <= 12; color++) paths.push(color + "color" + shape);
        paths.push("question" + shape, "ice_" + shape, "xz_" + shape);
    }
    return paths.sort();
}

/** 保留现有 PNG 的裁剪布局：[x,y,w,h,offsetX,offsetY,originalW,originalH]。 */
export const BLOCK_TEXTURE_TRIMS: { [path: string]: number[] } = {
    "10color0": [1, 0, 121, 129, 0.5, 0, 122, 129],
    "10color4": [1, 0, 121, 368, 0.5, 0, 122, 368],
    "10color7": [1, 1, 363, 251, 0.5, -0.5, 364, 252],
    "10color9": [1, 0, 366, 250, 0.5, 0, 367, 250],
    "1color0": [1, 0, 121, 129, 0.5, 0, 122, 129],
    "1color4": [1, 0, 121, 368, 0.5, 0, 122, 368],
    "1color7": [1, 1, 363, 251, 0.5, -0.5, 364, 252],
    "2color0": [1, 0, 121, 129, 0.5, 0, 122, 129],
    "2color4": [1, 0, 121, 368, 0.5, 0, 122, 368],
    "2color7": [1, 1, 363, 251, 0.5, -0.5, 364, 252],
    "3color0": [1, 0, 121, 129, 0.5, 0, 122, 129],
    "3color13": [1, 0, 363, 249, 0.5, 0, 364, 249],
    "3color3": [1, 0, 363, 131, 0.5, 0, 364, 131],
    "3color4": [1, 0, 123, 372, 0.5, 0, 124, 372],
    "3color7": [1, 1, 363, 251, 0.5, -0.5, 364, 252],
    "4color20": [23, 0, 244, 249, 11.5, 0, 267, 249],
    "4color4": [1, 0, 121, 368, 0.5, 0, 122, 368],
    "4color7": [1, 1, 363, 251, 0.5, -0.5, 364, 252],
    "4color9": [1, 0, 366, 250, 0.5, 0, 367, 250],
    "5color4": [1, 0, 121, 368, 0.5, 0, 122, 368],
    "5color7": [1, 1, 363, 251, 0.5, -0.5, 364, 252],
    "6color0": [1, 0, 121, 129, 0.5, 0, 122, 129],
    "6color13": [1, 0, 363, 249, 0.5, 0, 364, 249],
    "6color3": [1, 0, 363, 131, 0.5, 0, 364, 131],
    "6color4": [1, 0, 121, 368, 0.5, 0, 122, 368],
    "6color7": [1, 1, 363, 251, 0.5, -0.5, 364, 252],
    "7color4": [1, 0, 121, 368, 0.5, 0, 122, 368],
    "7color7": [1, 1, 363, 251, 0.5, -0.5, 364, 252],
    "8color11": [1, 0, 365, 254, 0.5, 0, 366, 254],
    "8color21": [1, 0, 246, 252, 0.5, 0, 247, 252],
    "8color22": [0, 1, 244, 250, 0, -0.5, 244, 251],
    "8color4": [1, 0, 121, 367, 0.5, 0, 122, 367],
    "8color7": [1, 1, 363, 251, 0.5, -0.5, 364, 252],
    "9color0": [1, 0, 121, 129, 0.5, 0, 122, 129],
    "9color4": [1, 0, 121, 368, 0.5, 0, 122, 368],
    "9color7": [1, 1, 363, 251, 0.5, -0.5, 364, 252],
    "xz_0": [2, 2, 154, 159, 0, 0, 158, 163],
    "xz_1": [2, 2, 272, 160, 0, 0, 276, 164],
    "xz_10": [2, 2, 272, 397, 0, 0, 276, 401],
    "xz_11": [2, 2, 393, 278, 0, 0, 397, 282],
    "xz_12": [2, 2, 272, 397, 0, 0, 276, 401],
    "xz_13": [2, 2, 393, 278, 0, 0, 397, 282],
    "xz_14": [2, 2, 395, 277, 0, 0, 399, 281],
    "xz_15": [2, 2, 395, 277, 0, 0, 399, 281],
    "xz_16": [2, 2, 273, 395, 0, 0, 277, 399],
    "xz_17": [2, 2, 273, 395, 0, 0, 277, 399],
    "xz_18": [2, 2, 392, 398, 0, 0, 396, 402],
    "xz_19": [2, 2, 275, 274, 0, 0, 279, 278],
    "xz_2": [2, 2, 155, 277, 0, 0, 159, 281],
    "xz_20": [2, 2, 274, 275, 0, 0, 278, 279],
    "xz_21": [2, 2, 275, 274, 0, 0, 279, 278],
    "xz_22": [2, 2, 274, 275, 0, 0, 278, 279],
    "xz_3": [2, 2, 393, 160, 0, 0, 397, 164],
    "xz_4": [2, 2, 151, 398, 0, 0, 155, 402],
    "xz_5": [2, 2, 272, 280, 0, 0, 276, 284],
    "xz_6": [2, 2, 272, 397, 0, 0, 276, 401],
    "xz_7": [2, 2, 393, 278, 0, 0, 397, 282],
    "xz_8": [2, 2, 272, 397, 0, 0, 276, 401],
    "xz_9": [2, 2, 393, 278, 0, 0, 397, 282],
};

/** 关卡中的颜色从 1 开始；颜色 11 使用灰色障碍图。 */
export function blockTexturePath(color: number, shape: number): string {
    return (color === 11 ? 0 : color) + "color" + shape;
}

export function blockCycleColors(value: string | number): number[] {
    return value == null ? [] : String(value).split("").map(char => Number(char) + 1);
}

/** 包含本关游玩过程中会出现的状态，而不只是开局颜色。 */
export function collectBlockTexturePaths(blocks: any[]): string[] {
    const paths = new Set<string>();
    for (const block of blocks || []) {
        if (!block || block.block == null || block.block === 23) continue;
        const shape = block.block;
        const colors = blockCycleColors(block.colorArray);
        if (!colors.length) colors.push(block.color);
        if (block.type === 1) colors.push(block.stacking);
        for (const color of colors) {
            if (!Number.isInteger(shape) || shape < 0 || shape > 22
                || !Number.isInteger(color) || color < 1 || color > 11) {
                throw new Error("无效的方块图片配置: " + JSON.stringify(block));
            }
            paths.add(blockTexturePath(color, shape));
        }
        // 旧 block6 的 10color 是问号外壳，与普通 10color 不是同一张图。
        if (block.type === 16) paths.add("question" + shape);
        if (block.lock != null) {
            paths.add("11color" + shape);
            paths.add("12color" + shape);
        }
    }
    return Array.from(paths).sort();
}