import { LogEncryptMode, ResultMsg, LogConfig } from './interface';
import Config from './global-config';
import LoganDB from './lib/logan-db';
import LogManager from './log-manager';
import { invokeInQueue } from './logan-operation-queue';
const ENC_UTF8 = require('crypto-js/enc-utf8');
const ENC_BASE64 = require('crypto-js/enc-base64');
interface LogStringOb {
    l: string;
    iv?: string;
    k?: string;
    v?: number;
}

let LoganDBInstance: LoganDB;
function base64Encode (text: string): string {
    const textUtf8 = ENC_UTF8.parse(text);
    const textBase64 = textUtf8.toString(ENC_BASE64);
    return textBase64;
}

export default async function saveLog (logConfig: LogConfig): Promise<void> {
    try {
        if (!LogManager.canSave()) {
            throw new Error(ResultMsg.EXCEED_TRY_TIMES);
        }
        if (!LoganDB.idbIsSupported()) {
            throw new Error(ResultMsg.DB_NOT_SUPPORT);
        }
        if (!LoganDBInstance) {
            LoganDBInstance = new LoganDB(Config.get('dbName') as
                | string
                | undefined);
        }
        if (logConfig.encryptVersion === LogEncryptMode.PLAIN) {
            const logStringOb: LogStringOb = {
                l: base64Encode(logConfig.logContent)
            };
            await invokeInQueue(async () => {
                await LoganDBInstance.addLog(
                    JSON.stringify(logStringOb)
                );
            });
        } else if (logConfig.encryptVersion === LogEncryptMode.RSA) {
            const publicKey = Config.get('publicKey');
            const encryptionModule = await import(
                    /* webpackChunkName: "encryption" */ './lib/encryption'
            );
            const cipherOb = encryptionModule.encryptByRSA(
                logConfig.logContent,
                `${publicKey}`
            );
            const logStringOb: LogStringOb = {
                l: cipherOb.cipherText,
                iv: cipherOb.iv,
                k: cipherOb.secretKey,
                v: LogEncryptMode.RSA
            };
            await invokeInQueue(async () => {
                await LoganDBInstance.addLog(
                    JSON.stringify(logStringOb)
                );
            });
        } else {
            throw new Error(`encryptVersion ${logConfig.encryptVersion} is not supported.`);
        }
        await (Config.get('succHandler') as Function)(logConfig);
    } catch (e) {
        LogManager.errorTrigger();
        await (Config.get('errorHandler') as Function)(e);
    }
}