import { prisma } from "@/lib/api/db";
import type { NextApiRequest, NextApiResponse } from "next";
import bcrypt from "bcrypt";
import verifyUser from "../../verifyUser";

const emailEnabled =
  process.env.EMAIL_FROM && process.env.EMAIL_SERVER ? true : false;
const stripeEnabled = process.env.STRIPE_SECRET_KEY ? true : false;

interface Data {
  response: string | object;
}

interface User {
  name: string;
  username?: string;
  email?: string;
  password: string;
}

export default async function postUser(
  req: NextApiRequest,
  res: NextApiResponse<Data>
) {
  let isServerAdmin = false;

  const user = await verifyUser({ req, res });
  if (process.env.ADMINISTRATOR === user?.username) isServerAdmin = true;

  if (
    process.env.NEXT_PUBLIC_DISABLE_REGISTRATION === "true" &&
    !isServerAdmin
  ) {
    return res.status(400).json({ response: "Registration is disabled." });
  }

  const body: User = req.body;

  const checkHasEmptyFields = emailEnabled
    ? !body.password || !body.name || !body.email
    : !body.username || !body.password || !body.name;

  if (!body.password || body.password.length < 8)
    return res
      .status(400)
      .json({ response: "Password must be at least 8 characters." });

  if (checkHasEmptyFields)
    return res
      .status(400)
      .json({ response: "Please fill out all the fields." });

  // Check email (if enabled)
  const checkEmail =
    /^(([^<>()[\]\.,;:\s@\"]+(\.[^<>()[\]\.,;:\s@\"]+)*)|(\".+\"))@(([^<>()[\]\.,;:\s@\"]+\.)+[^<>()[\]\.,;:\s@\"]{2,})$/i;
  if (emailEnabled && !checkEmail.test(body.email?.toLowerCase() || ""))
    return res.status(400).json({
      response: "Please enter a valid email.",
    });

  // Check username (if email was disabled)
  const checkUsername = RegExp("^[a-z0-9_-]{3,31}$");
  if (!emailEnabled && !checkUsername.test(body.username?.toLowerCase() || ""))
    return res.status(400).json({
      response:
        "Username has to be between 3-30 characters, no spaces and special characters are allowed.",
    });

  const checkIfUserExists = await prisma.user.findFirst({
    where: {
      OR: [
        {
          email: body.email?.toLowerCase().trim(),
        },
        {
          username: (body.username as string).toLowerCase().trim(),
        },
      ],
    },
  });

  if (!checkIfUserExists) {
    const saltRounds = 10;

    const hashedPassword = bcrypt.hashSync(body.password, saltRounds);

    // Subscription dates
    const currentPeriodStart = new Date();
    const currentPeriodEnd = new Date();
    currentPeriodEnd.setFullYear(currentPeriodEnd.getFullYear() + 1000); // end date is in 1000 years...

    if (isServerAdmin) {
      const user = await prisma.user.create({
        data: {
          name: body.name,
          username: (body.username as string).toLowerCase().trim(),
          email: emailEnabled ? body.email?.toLowerCase().trim() : undefined,
          password: hashedPassword,
          emailVerified: new Date(),
          subscriptions: stripeEnabled
            ? {
                create: {
                  stripeSubscriptionId:
                    "fake_sub_" + Math.round(Math.random() * 10000000000000),
                  active: true,
                  currentPeriodStart,
                  currentPeriodEnd,
                },
              }
            : undefined,
        },
        select: {
          id: true,
          username: true,
          email: true,
          emailVerified: true,
          subscriptions: {
            select: {
              active: true,
            },
          },
          createdAt: true,
        },
      });

      return res.status(201).json({ response: user });
    } else {
      await prisma.user.create({
        data: {
          name: body.name,
          username: emailEnabled
            ? undefined
            : (body.username as string).toLowerCase().trim(),
          email: emailEnabled ? body.email?.toLowerCase().trim() : undefined,
          password: hashedPassword,
        },
      });

      return res.status(201).json({ response: "User successfully created." });
    }
  } else if (checkIfUserExists) {
    return res.status(400).json({
      response: `Email or Username already exists.`,
    });
  }
}