/**
 * 摄像头扫码
 *
 * 需求：
 * - 侧键扫码继续走输入框，这里只处理摄像头
 * - 仿照 ZL-MES-UNIAPP /pages/rollingScan 使用 uni.scanCode 打开摄像头扫码
 *
 * 做法：
 * - 摄像头走 uni.scanCode
 * - 原有支付宝 mPaaS 原生插件（Mpaas-Scan-Module）方法已注释保留
 */

function isAppPlus() {
  return typeof plus !== "undefined";
}

function isCancelError(err) {
  if (!err) return false;
  if (err.cancelled) return true;
  if (
    err.code === 8 ||
    err.code === "8" ||
    err.code === 10 ||
    err.code === "10"
  )
    return true;
  const msg = String(
    err.errMsg || err.message || err.resp_message || err || "",
  );
  return /cancel|取消/i.test(msg);
}

export function normalizeScanText(raw) {
  if (raw == null) return "";
  let text = String(raw);
  text = text.replace(/^/, "");
  text = text.replace(/\u0000/g, "");
  text = text.replace(/^[\r\n\u0003\u0004]+/, "");
  text = text.replace(/[\r\n\u0003\u0004]+$/, "");
  return text.trim();
}

// ========== 以下为原有支付宝 mPaaS 原生插件扫码，已注释保留 ==========
/*
function scanByMpaas() {
  return new Promise((resolve, reject) => {
    try {
      const mpaasScanModule = uni.requireNativePlugin("Mpaas-Scan-Module");
      if (!mpaasScanModule || typeof mpaasScanModule.mpaasScan !== "function") {
        reject(new Error("Mpaas-Scan-Module unavailable"));
        return;
      }
      mpaasScanModule.mpaasScan(
        {
          scanType: ["qrCode", "barCode"],
          hideAlbum: false,
        },
        (ret) => {
          if (!ret) {
            reject(new Error("mpaas empty response"));
            return;
          }
          if (ret.resp_code === 1000) {
            resolve(normalizeScanText(ret.resp_result));
            return;
          }
          reject({
            code: ret.resp_code,
            message: ret.resp_message,
            cancelled: ret.resp_code === 10,
          });
        },
      );
    } catch (err) {
      reject(err);
    }
  });
}
*/

export function scanByCamera() {
  return new Promise((resolve) => {
    const done = (text) => {
      const value = normalizeScanText(text);
      if (!value) {
        uni.showToast({
          title: "扫码内容为空",
          icon: "none",
        });
        resolve("");
        return;
      }
      resolve(value);
    };
    const cancel = () => resolve("");
    const failToast = () => {
      uni.showToast({
        title: "扫码失败",
        icon: "none",
      });
      resolve("");
    };

    if (!isAppPlus()) {
      failToast();
      return;
    }

    // 仿照 ZL-MES-UNIAPP /pages/rollingScan 的 uni.scanCode 用法
    uni.scanCode({
      // 是否只能从相机扫码，不允许从相册选择图片
      onlyFromCamera: false,
      // 扫码识别类型
      scanType: ["qrCode", "barCode"],
      // 是否启用自动放大
      autoZoom: true,
      // 是否隐藏相册
      hideAlbum: false,
      success: (res) => {
        done(res && res.result);
      },
      fail: (err) => {
        if (isCancelError(err)) {
          cancel();
          return;
        }
        failToast();
      },
    });
  });
}

export function scanByCameraCompat(_options, callback) {
  scanByCamera().then((text) => {
    if (typeof callback !== "function") return;
    if (!text) {
      callback({
        resp_code: 10,
        resp_message: "用户取消",
        resp_result: "",
      });
      return;
    }
    callback({
      resp_code: 1000,
      resp_message: "成功",
      resp_result: text,
    });
  });
}