import { dialog, ipcMain } from "electron";
import os from "os";
import {
  findDcmFiles,
  keyProp,
  processFilesInBatches,
  StructuredMetadata,
  structureMetadata,
} from "./core/dicom";
import { EVENT_PARSE_DICOM } from "./ipcEvent";
import PythonManager from "./core/PythonManager";
import { db } from "./core/db";

/**
 * 渲染进程和主进程的事件调度
 */
const registerIpcMainHandlers = (
  mainWindow: Electron.BrowserWindow | null,
  pythonManager: PythonManager
) => {
  if (!mainWindow) return;

  ipcMain.removeAllListeners();

  /**
   * 等待渲染完成再显示窗口
   */
  ipcMain.on("ipc-loaded", () => mainWindow.show());

  /**
   * 解析dicoM
   */
  ipcMain.on(EVENT_PARSE_DICOM, async (event, file: string) => {
    const dirDialog = await dialog.showOpenDialog(mainWindow, {
      properties: ["openDirectory"],
    });
    if (dirDialog.filePaths.length > 0) {
      const filePaths = await findDcmFiles(dirDialog.filePaths[0]);
      const batchSize = os.cpus().length * 1 || 10;
      console.time("分批处理");
      const unraw = await processFilesInBatches(filePaths, batchSize);
      console.timeEnd("分批处理");
      const result = structureMetadata(unraw);
      event.reply(EVENT_PARSE_DICOM + ":RES", result);
    }
  });

  ipcMain.on("python-service", (event, data) => {
    const { running } = data;
    running ? pythonManager.startFlask() : pythonManager.stopFlask();
  });

  /**
   * 显示选择文件夹的dialog
   */
  ipcMain.on("import-dicom-dialog-visible", async (event) => {
    const result = await dialog.showOpenDialog({
      properties: ["openDirectory"],
    });
    if (result.canceled) return null;
    const filePaths = result.filePaths[0];
    event.reply("scan-start");
    const scanTimeStart = Date.now();
    const dcmPaths = await findDcmFiles(filePaths);
    const batchSize = os.cpus().length * 1 || 10;
    const items = await processFilesInBatches(dcmPaths, batchSize);
    const structDicom = await structureMetadata(items, (progress) => {
      event.reply("scan-progress", progress);
    });
    // 存数据库
    const changeTime = Date.now();
    for (const item of structDicom) {
      const existSeries = db.data.series.find(
        (i) => i[keyProp] === item[keyProp]
      );
      existSeries
        ? Object.assign(existSeries, item, { updateTime: changeTime })
        : db.data.series.push({
            ...item,
            createTime: changeTime,
            updateTime: changeTime,
          });
      await db.write();
    }
    event.reply("scan-progress-done", {
      structDicom,
      scanDuration: Date.now() - scanTimeStart,
    });
  });

  /**
   * api 获取 列表的中数据
   */
  ipcMain.on("db:series:select", async (event, data) => {
    await db.read();
    const seriesList = db.data.series;
    event.reply("db:series:select:response", seriesList);
  });
};

export default registerIpcMainHandlers;