const API = require("../../lib/API");
const { BaseStdResponse } = require("../../BaseStdResponse");
const Redis = require('../../plugin/DataBase/Redis');
const sendEmail = require('../../plugin/Email/Email');

// 发送邮箱验证码
class SendEmail extends API {
    constructor() {
        super();

        this.setMethod("POST");
        this.setPath("/Captcha/SendEmail");
    }

    async onRequest(req, res) {
        const { email, text, id, type } = req.body;

        if ([email, text, id, type].some(value => value === '' || value === null || value === undefined)) {
            res.json({
                ...BaseStdResponse.MISSING_PARAMETER,
                endpoint: 1513126
            });
            return;
        }

        try {
            const code = await Redis.get(`captcha:${id}`);
            if (!code || code != text.toLowerCase())
                return res.json({
                    ...BaseStdResponse.SMS_CHECK_FAIL,
                    msg: '验证码输入错误或已过期'
                })

            await Redis.del(`captcha:${id}`);
        } catch (err) {
            this.logger.error(`验证图片验证码失败！${err.stack}`);
            return res.json({
                ...BaseStdResponse.DATABASE_ERR,
                msg: '验证失败！'
            })
        }

        let content;
        switch (type) {
            case 'register':
                content = '您正在注册GitNexus账号，';
                break;
            case 'forget':
                content = '您正在找回GitNexus账号，';
                break;
            case 'bind':
                content = '您正在进行换绑邮箱操作，';
                break;
            default:
                return res.json({
                    ...BaseStdResponse.METHOD_NOT_EXIST
                })
        }

        const code = Math.random().toFixed(6).slice(-6);
        try {
            await Redis.set(`email:${email}`, code, {
                EX: 600
            });
        } catch (err) {
            this.logger.error(`发送邮箱验证码失败！${err.stack}`);
            return res.json({
                ...BaseStdResponse.SMS_SEND_FAIL,
                msg: '请检查邮箱格式后再试！'
            })
        }

        res.json({
            ...BaseStdResponse.OK
        })

        // 先返回后发送
        await sendEmail(email, '验证码', `${content}您的验证码为：${code}。此验证码10分钟内有效，请妥善保管您的验证码，非本人操作请忽略。`);
    }
}

module.exports.SendEmail = SendEmail;