import {
    User
} from "../../../models/User";
import redis from "../../../config/redis";
import {
    StartMailVerifyResult,
    StartMailVerifyInput
} from "./types";
import {
    verificationCode,
    TTL_SECONDS
} from "../../../utils";
// import { sendMail } from "../../../utils/mailer"; // mail gönderme fonskiyonu bu şekilde ilerde import edilecek.

const startMailVerify = async (input: StartMailVerifyInput): Promise<StartMailVerifyResult> => {
    try {
        const {
            userID
        } = input;

        const user = await User.findById(userID);
        if (!user) {
            return {
                message: "user-not-found",
                code: 404
            };
        }

        if (user.isMailVerified) {
            return {
                message: "mail-already-verified",
                code: 400
            };
        }

        const existingTTL = await redis.ttl(`mail-verify-${userID}`);

        if (existingTTL > 0) {
            return {
                message: "please-wait-before-requesting-again",
                code: 429,
                payload: {
                    remainingTime: existingTTL
                }
            };
        }

        await redis.setex(`mail-verify-${userID}`, TTL_SECONDS, verificationCode);

        // MAİL GÖNDERME İŞLEMİ (mail servisini bağla) bu kısımda olacak şimdilik elle müdahale ediliyor.
        // await sendMail(user.mail, "Doğrulama Kodunuz", `Kodunuz: ${verificationCode}`); şeklinde olacak.

        return {
            message: "verification-code-sent",
            code: 200,
            payload: {
                remainingTime: TTL_SECONDS
            }
        };

    } catch (error) {
        console.error("StartMailVerify error:", error);
        return {
            message: "internal-server-error",
            code: 500
        };
    }
};

export default startMailVerify;