"use strict";
import FileApi from "@/peach/api/common/file";

const ERR_MSG_OK = "chooseAndUploadFile:ok";
const ERR_MSG_FAIL = "chooseAndUploadFile:fail";

function chooseImage(opts) {
  const {
    count,
    sizeType = ["original", "compressed"],
    sourceType = ["album", "camera"],
    extension,
  } = opts;
  return new Promise((resolve, reject) => {
    uni.chooseImage({
      count,
      sizeType,
      sourceType,
      extension,
      success(res) {
        resolve(normalizeChooseAndUploadFileRes(res, "image"));
      },
      fail(res) {
        reject({
          errMsg: res.errMsg.replace("chooseImage:fail", ERR_MSG_FAIL),
        });
      },
    });
  });
}

function chooseVideo(opts) {
  const {
    camera,
    compressed,
    maxDuration,
    sourceType = ["album", "camera"],
    extension,
  } = opts;
  return new Promise((resolve, reject) => {
    uni.chooseVideo({
      camera,
      compressed,
      maxDuration,
      sourceType,
      extension,
      success(res) {
        const { tempFilePath, duration, size, height, width } = res;
        resolve(
          normalizeChooseAndUploadFileRes(
            {
              errMsg: "chooseVideo:ok",
              tempFilePaths: [tempFilePath],
              tempFiles: [
                {
                  name: (res.tempFile && res.tempFile.name) || "",
                  path: tempFilePath,
                  size,
                  type: (res.tempFile && res.tempFile.type) || "",
                  width,
                  height,
                  duration,
                  fileType: "video",
                  cloudPath: "",
                },
              ],
            },
            "video"
          )
        );
      },
      fail(res) {
        reject({
          errMsg: res.errMsg.replace("chooseVideo:fail", ERR_MSG_FAIL),
        });
      },
    });
  });
}

function chooseAll(opts) {
  const { count, extension } = opts;
  return new Promise((resolve, reject) => {
    let chooseFile = uni.chooseFile;
    if (
      typeof wx !== "undefined" &&
      typeof wx.chooseMessageFile === "function"
    ) {
      chooseFile = wx.chooseMessageFile;
    }
    if (typeof chooseFile !== "function") {
      return reject({
        errMsg:
          ERR_MSG_FAIL + " 请指定 type 类型，该平台仅支持选择 image 或 video。",
      });
    }
    chooseFile({
      type: "all",
      count,
      extension,
      success(res) {
        resolve(normalizeChooseAndUploadFileRes(res));
      },
      fail(res) {
        reject({
          errMsg: res.errMsg.replace("chooseFile:fail", ERR_MSG_FAIL),
        });
      },
    });
  });
}

function normalizeChooseAndUploadFileRes(res, fileType) {
  res.tempFiles.forEach((item, index) => {
    if (!item.name) {
      item.name = item.path.substring(item.path.lastIndexOf("/") + 1);
    }
    if (fileType) {
      item.fileType = fileType;
    }
    item.cloudPath =
      Date.now() +
      "_" +
      index +
      item.name.substring(item.name.lastIndexOf("."));
  });
  if (!res.tempFilePaths) {
    res.tempFilePaths = res.tempFiles.map((file) => file.path);
  }
  return res;
}

function uploadCloudFiles(files, max = 5, onUploadProgress) {
  files = JSON.parse(JSON.stringify(files));
  const len = files.length;
  let count = 0;
  let self = this;
  return new Promise((resolve) => {
    while (count < max) {
      next();
    }

    function next() {
      let cur = count++;
      if (cur >= len) {
        !files.find((item) => !item.url && !item.errMsg) && resolve(files);
        return;
      }
      const fileItem = files[cur];
      const index = self.files.findIndex((v) => v.uuid === fileItem.uuid);
      fileItem.url = "";
      delete fileItem.errMsg;

      uniCloud
        .uploadFile({
          filePath: fileItem.path,
          cloudPath: fileItem.cloudPath,
          fileType: fileItem.fileType,
          onUploadProgress: (res) => {
            res.index = index;
            onUploadProgress && onUploadProgress(res);
          },
        })
        .then((res) => {
          fileItem.url = res.fileID;
          fileItem.index = index;
          if (cur < len) {
            next();
          }
        })
        .catch((res) => {
          fileItem.errMsg = res.errMsg || res.message;
          fileItem.index = index;
          if (cur < len) {
            next();
          }
        });
    }
  });
}

function uploadFiles(choosePromise, { onChooseFile, onUploadProgress }) {
  return choosePromise
    .then((res) => {
      if (onChooseFile) {
        const customChooseRes = onChooseFile(res);
        if (typeof customChooseRes !== "undefined") {
          return Promise.resolve(customChooseRes).then((chooseRes) =>
            typeof chooseRes === "undefined" ? res : chooseRes
          );
        }
      }
      return res;
    })
    .then((res) => {
      if (res === false) {
        return {
          errMsg: ERR_MSG_OK,
          tempFilePaths: [],
          tempFiles: [],
        };
      }
      return res;
    })
    .then(async (files) => {
      for (let file of files.tempFiles) {
        const { data } = await FileApi.uploadFile(file.path);
        file.url = data;
      }
      return files;
    });
}

function chooseAndUploadFile(
  opts = {
    type: "all",
  }
) {
  if (opts.type === "image") {
    return uploadFiles(chooseImage(opts), opts);
  } else if (opts.type === "video") {
    return uploadFiles(chooseVideo(opts), opts);
  }
  return uploadFiles(chooseAll(opts), opts);
}

export { chooseAndUploadFile, uploadCloudFiles };