import {
    join,
    dirname
} from 'path'
import {
    Low,
    JSONFile
} from 'lowdb'
import {
    fileURLToPath
} from 'url'
import ConfigHelper from "./ConfigHelper.mjs";

const __dirname = dirname(fileURLToPath(
    import.meta.url));


const getDbPath = (dbName, defPath) => {
    let file = "";
    if (ConfigHelper.config && ConfigHelper.config.db && ConfigHelper.config.db[dbName]) {
        file = ConfigHelper.config.path + ConfigHelper.config.db[dbName];
    } else {
        file = defPath;
    }
    return file;
}


/**
 * 基础数据库
 * @returns 
 */
export const getDb = async () => {
    let file = getDbPath('db', join(__dirname, 'db.json'));

    const adapter = new JSONFile(file)
    const db = new Low(adapter)
    await db.read();
    return db;
}

/**
 * 文件资源库
 * @returns 
 */
export const getResourceDb = async () => {
    let file = getDbPath('resourceDB', join(__dirname, 'resourceDB.json'));

    const adapter = new JSONFile(file)
    const db = new Low(adapter)
    await db.read();
    return db;
}

/**
 * 备份记录存储库
 * @returns 
 */
export const getBackupDb = async () => {
    let file = getDbPath('backupDB', join(__dirname, 'backupDB.json'));

    const adapter = new JSONFile(file)
    const db = new Low(adapter)
    await db.read();
    return db;
}

/**
 * 日志存储库
 * @returns 
 */
export const getLogDb = async () => {
    let file = getDbPath('logDB', join(__dirname, 'logDB.json'));

    const adapter = new JSONFile(file)
    const db = new Low(adapter)
    await db.read();
    return db;
}

export default getDb;