/**
 * 雪碧图注册表
 * 用途：sprite-icon 按 sheet + name 从多张 CDN 雪碧图裁切显示图标
 * 图片地址随 ext.json / 环境 imgHost 变化，必须用函数运行时读取，不能用 this.$constant
 */
import constant from "@/constant/index";

/** 默认图床（ext 未配置 imgHost 时的兜底） */
const DEFAULT_IMG_HOST = "https://img.huaml.com";

/** 未传 sheet 时默认使用的雪碧图 key */
const DEFAULT_SHEET_KEY = "main";

/**
 * 雪碧图注册表：每张图含 path、原图尺寸、icons 坐标
 */
export const SPRITE_SHEETS = {
  main: {
    path: "/hhb/sprite_icon/main-index.webp?time=2607171640",
    width: 500,
    height: 500,
    icons: {
      "dengji-biandong": { x: 14, y: 17, w: 28, h: 30 },
      "yue-biandong": { x: 60, y: 17, w: 28, h: 30 },
      "huiyuan-quanyi": { x: 102, y: 17, w: 28, h: 30 },
      "lianxikefu": { x: 145, y: 17, w: 28, h: 30 },
      "huangguan": { x: 189, y: 20, w: 22, h: 21 },
      "shezhi": { x: 13, y: 62, w: 34, h: 36 },
      "shaixuan": { x: 71, y: 67, w: 25, h: 25 },
      "dianpu-fill": { x: 116, y: 63, w: 31, h: 30 },
      "huoche-cheng": { x: 171, y: 68, w: 23, h: 21 },
      "huoche-lv": { x: 204, y: 68, w: 23, h: 21 },
      "gou-quan": { x: 246, y: 68, w: 22, h: 21 },
      "huashu": { x: 4, y: 118, w: 52, h: 49 },
      "hua": { x: 94, y: 118, w: 52, h: 49 },
      "dianpu-line": { x: 167, y: 114, w: 51, h: 51 },
      "tuichu": { x: 243, y: 111, w: 49, h: 51 },
      "xiaoxi": { x: 8, y: 186, w: 43, h: 44 },
      "qianbao": { x: 68, y: 182, w: 55, h: 48 },
      "huoche-da": { x: 142, y: 182, w: 58, h: 48 },
      "baoguo": { x: 219, y: 182, w: 49, h: 48 },
      "fanghu-yuan": { x: 282, y: 182, w: 42, h: 48 },
      "youhuiquan-yellow": { x: 344, y: 184, w: 50, h: 50 },
      "gengduo-quan": { x: 274, y: 102, w: 52, h: 52 },
      "icon-home": { x: 274, y: 102, w: 52, h: 52 },
      "icon-home-active": { x: 274, y: 102, w: 52, h: 52 },
      "gengduo-quan": { x: 274, y: 102, w: 52, h: 52 },
	  "icon-home": { x: 7, y: 245, w: 50, h: 50 },
	  "icon-home-active": { x: 60, y: 245, w: 50, h: 50 },
	  "icon-category": { x: 116, y: 245, w: 50, h: 50 },
	  "icon-category-active": { x: 176, y: 245, w: 50, h: 50 },
	  "icon-cart": { x: 238, y: 245, w: 50, h: 50 },
	  "icon-cart-active": { x: 293, y: 245, w: 50, h: 50 },
	  "icon-order": { x: 366, y: 245, w: 50, h: 50 },
	  "icon-order-active": { x: 418, y: 245 , w: 50, h: 50 },
	  "cart-delete": { x: 7, y: 298 , w: 46, h: 52 },//购物车-删除
	  "notice": { x: 216, y: 15 , w: 31, h: 31 },//公告通知
    }
  },
  /** 进货/供货商专用雪碧图，坐标待设计稿测量后补全 */
  order: {
    path: "/hhb/sprite_icon/icon-order.webp?time=26072009",
    width: 600,
    height: 600,
    icons: {
		"ps-shop": { x: 257, y: 8 , w: 57, h: 50 },//商家配送
		"ps-shop-active": { x: 190, y: 8 , w: 57, h: 50 },//商家配送-active
		"ps-paotui": { x: 198, y: 63 , w: 59, h: 50 },//跑腿配送
		"ps-paotui-active": { x: 129, y: 63 , w: 59, h: 50 },//跑腿配送-active
		"ps-daodian": { x: 383, y: 8 , w: 48, h: 50 },//到店自取
		"ps-daodian-active": { x: 324, y: 8 , w: 49, h: 50 },//到店自取-active
		"ps-kuaidi": { x: 72, y: 63 , w: 47, h: 50 },//快递
		"ps-kuaidi-active": { x: 12, y: 63 , w: 46, h: 50 },//快递-active
		"ps-wuliu": { x: 441, y: 8 , w: 67, h: 50 },//物流
		"ps-wuliu-active": { x: 518, y: 8 , w: 66, h: 50 },//物流-active
		"huoche": { x: 7, y: 8 , w: 46, h: 50 },//配送说明-小货车
		"youhuiquan": { x: 267, y: 63 , w: 58, h: 50 },//优惠券
		"beizhu": { x: 12, y: 8 , w: 50, h: 50 },//订单-备注
		"shijian": { x: 70, y: 8 , w: 52, h: 52 },//配送时间
		"shijianduan": { x: 129, y: 8 , w: 52, h: 52 },//配送时间段
		"dingwei": { x: 339, y: 63 , w: 42, h: 51 },//定位
	}
  }
};

/** tabBar 未选中 / 选中 图标名映射（main 雪碧图） */
export const TAB_SPRITE_MAP = {
  home: { normal: "dianpu-line", active: "dianpu-fill" },
  order: { normal: "huoche-lv", active: "huoche-da" },
  mine: { normal: "gou-quan", active: "qianbao" }
};

/** @deprecated 兼容旧引用 */
export const MAIN_INDEX_SPRITE = {
  width: SPRITE_SHEETS.main.width,
  height: SPRITE_SHEETS.main.height
};

/** @deprecated 兼容旧引用 */
export const MAIN_INDEX_ICONS = SPRITE_SHEETS.main.icons;

function buildIconSheetIndex(sheets) {
  const index = {};
  Object.keys(sheets).forEach((sheetKey) => {
    const icons = sheets[sheetKey].icons || {};
    Object.keys(icons).forEach((name) => {
      if (index[name] && index[name] !== sheetKey && process.env.NODE_ENV !== "production") {
        console.warn(`[sprite] 图标名 "${name}" 在 ${index[name]} 与 ${sheetKey} 中重复，以 ${sheetKey} 为准`);
      }
      index[name] = sheetKey;
    });
  });
  return index;
}

const ICON_SHEET_INDEX = buildIconSheetIndex(SPRITE_SHEETS);

function getImgHostBase() {
  let base = (constant.imgUrl || DEFAULT_IMG_HOST).replace(/\/$/, "");
  if (base.indexOf("http://") === 0) {
    base = `https://${base.slice(7)}`;
  }
  return base;
}

function rpx2px(rpx) {
  if (typeof uni !== "undefined" && typeof uni.upx2px === "function") {
    return uni.upx2px(rpx);
  }
  return rpx;
}

/**
 * 计算图标显示宽高与缩放比（支持按宽度 size 或按高度 height 等比缩放）
 * @param {{ w: number, h: number }} icon 雪碧图坐标中的原始宽高
 * @param {{ size?: number|string, height?: number|string }} opts
 * @returns {{ displayW: number, displayH: number, scale: number }}
 */
function resolveSpriteDisplaySize(icon, opts = {}) {
  const heightNum = Number(opts.height);
  const useHeight = opts.height !== "" && opts.height != null && !Number.isNaN(heightNum) && heightNum > 0;

  let scale;
  let displayW;
  let displayH;

  if (useHeight) {
    displayH = Math.round(heightNum);
    scale = displayH / icon.h;
    displayW = Math.round(icon.w * scale);
  } else {
    const sizeNum = Number(opts.size);
    displayW = !Number.isNaN(sizeNum) && sizeNum > 0 ? sizeNum : 48;
    scale = displayW / icon.w;
    displayH = Math.round(icon.h * scale);
  }

  return { displayW, displayH, scale };
}

export function resolveSprite(name, sheetKey = "") {
  if (!name) {
    return null;
  }
  let key = sheetKey;
  if (!key) {
    key = ICON_SHEET_INDEX[name] || DEFAULT_SHEET_KEY;
  }
  const sheet = SPRITE_SHEETS[key];
  if (!sheet) {
    return null;
  }
  const icon = (sheet.icons || {})[name];
  if (!icon) {
    return null;
  }
  return { sheetKey: key, sheet, icon };
}

export function getSpriteSheetUrl(sheetKey = DEFAULT_SHEET_KEY) {
  const sheet = SPRITE_SHEETS[sheetKey];
  if (!sheet) {
    return "";
  }
  return `${getImgHostBase()}${sheet.path}`;
}

export function spriteImageStyle(name, size = 48, sheetKey = "", height = "") {
  const resolved = resolveSprite(name, sheetKey);
  if (!resolved) {
    if (process.env.NODE_ENV !== "production") {
      console.warn(`[sprite-icon] 未找到图标: name=${name}${sheetKey ? ` sheet=${sheetKey}` : ""}`);
    }
    return { wrap: "", inner: "", image: "" };
  }
  const { sheet, icon } = resolved;
  const { displayW, displayH, scale } = resolveSpriteDisplaySize(icon, { size, height });
  const sheetW = sheet.width * scale;
  const sheetH = sheet.height * scale;
  const left = -rpx2px(icon.x * scale);
  const top = -rpx2px(icon.y * scale);
  const sheetWPx = rpx2px(sheetW);
  const sheetHPx = rpx2px(sheetH);
  return {
    wrap: `position:relative;width:${displayW}rpx;height:${displayH}rpx;overflow:hidden;line-height:0;`,
    inner: `position:absolute;left:${left}px;top:${top}px;width:${sheetWPx}px;height:${sheetHPx}px;`,
    image: "width:100%;height:100%;display:block;"
  };
}

export function spriteStyle(name, size = 48, sheetKey = "", height = "") {
  const resolved = resolveSprite(name, sheetKey);
  if (!resolved) {
    return "";
  }
  const { sheetKey: key, sheet, icon } = resolved;
  const { displayW, displayH, scale } = resolveSpriteDisplaySize(icon, { size, height });
  const sheetW = sheet.width * scale;
  const sheetH = sheet.height * scale;
  const posX = rpx2px(icon.x * scale);
  const posY = rpx2px(icon.y * scale);
  const sheetWPx = rpx2px(sheetW);
  const sheetHPx = rpx2px(sheetH);
  const url = getSpriteSheetUrl(key);
  return [
    `width:${displayW}rpx`,
    `height:${displayH}rpx`,
    `background-image:url(${url})`,
    `background-size:${sheetWPx}px ${sheetHPx}px`,
    `background-position:-${posX}px -${posY}px`,
    "background-repeat:no-repeat",
    "display:inline-block",
    "flex-shrink:0",
    "vertical-align:middle"
  ].join(";");
}

export function getMainIndexSpriteUrl() {
  return getSpriteSheetUrl(DEFAULT_SHEET_KEY);
}

export function mainIndexSpriteImageStyle(name, size = 48, height = "") {
  return spriteImageStyle(name, size, DEFAULT_SHEET_KEY, height);
}

export function mainIndexSpriteStyle(name, size = 48, height = "") {
  return spriteStyle(name, size, DEFAULT_SHEET_KEY, height);
}