const { remote, ipcRenderer } = require('electron');
const fs = require('fs');
const { tr } = require('../core/translate');
const { readJson } = require('../core/utils');

// 监听 Electron 发送的 IPC，并将其转发到 hostAPI 中设置的监听器中
let panelWinStateChangedListener = null;
ipcRenderer.on("im-plugin:panel-win-state-changed", (event, eventName) => {
  panelWinStateChangedListener && panelWinStateChangedListener(eventName);
});

global.hostAPI = {
  imPluginVersion: readJson(`${__dirname}/../package.json`).version,

  sendToHost: (channel, param) => {
    if (channel === "new-msg") {
      ipcRenderer.sendToHost("new-msg", {
        newMsgCount: param,
      });
    } else if (channel === "download") {
      let options = {};
      if (param.type === "image") {
        options = {
          title: tr("save-image"),
          defaultPath: param.fileName,
          filters: [
            {
              name: tr("image-filter-name"),
              extensions: ["jpg", "jpeg", "png", "gif"],
            },
          ],
        };
      } else {
        options = {
          title: tr("save-file"),
          defaultPath: param.fileName,
          filters: [{ name: tr("file-filter-name"), extensions: ["*"] }],
        };
      }
      remote.dialog.showSaveDialog(options, (filePath) => {
        if (!filePath) return;
        ipcRenderer.sendToHost("download", {
          url: param.url,
          path: filePath,
        });
      });
    }
  },

  isReady(isReady) {
    ipcRenderer.sendToHost("is-ready", isReady);
  },

  setWindowListener: (listener) => {
    panelWinStateChangedListener = listener;
  },

  selectFile(type) {
    let result;
    if (type === "image") {
      result = remote.dialog.showOpenDialog({
        title: tr("select-image"),
        properties: ["openFile"],
        filters: [
          {
            name: tr("image-filter-name"),
            extensions: ["jpg", "jpeg", "png", "gif"],
          },
        ],
      });
    } else {
      result = remote.dialog.showOpenDialog({
        title: tr("select-file"),
        properties: ["openFile"],
        filters: [
          {
            name: tr("file-filter-name"),
            extensions: ["*"],
          },
        ],
      });
    }

    function getFileByPath(path) {
      const fileName = path.split("/").slice(-1)[0];
      const fileBuffer = fs.readFileSync(path);
      const file = new File([fileBuffer], fileName);

      return file;
    }

    if (!result) {
      return Promise.resolve("");
    }

    if (result.then) {
      return result.then((res) => {
        if (res.canceled) {
          return "";
        }
        // 单选
        const filePath = res.filePaths[0];

        return getFileByPath(filePath);
      });
    }

    // 单选
    const filePath = result[0];

    return Promise.resolve(getFileByPath(filePath));
  },
};