import path from "node:path";
import { JSONFilePreset } from "lowdb/node";
import { app } from "electron";
import { Low } from "node_modules/lowdb/lib/core/Low";
import { StructuredMetadata } from "./dicom";
import { merge } from "lodash";

export interface ICreateDatabase {
  name: string;
}

export type SeriesTableType = StructuredMetadata & {
  createTime?: number;
  updateTime?: number;
};

export type SettingTableType = {
  /**
   * 推理硬件默认是GPU、可选CPU、NPU
   * @default GPU
   */
  inferDevice: string;
  /**
   * 用户文件位置
   * @description 用于存储算法输出、应用生成的产物的路径
   */
  outputPath: string;
};

export interface DbTable {
  series: SeriesTableType[];
  setting: SettingTableType;
}

const defaultTable: DbTable = {
  series: [],
  setting: {
    inferDevice: "gpu",
    outputPath: path.join(app.getPath("userData"), "output"),
  },
};

export let db: Low<DbTable>;

export const createDatabase = async (config: ICreateDatabase) => {
  const { name } = config;
  const dbJsonFilePath = path.join(app.getPath("userData"), name);
  db = await JSONFilePreset(dbJsonFilePath, defaultTable);
  // 表结构更新，增量合并
  db.data = merge({}, defaultTable, db.data);
  await db.write();
};