import bcrypt from "bcrypt";
import { Request, Response } from "express";
import { QueryResult } from "pg";
import db from "../database/postgres.js";
import type { AdminCreationResult } from "../types/user.js";
import { isPostgresError, PostgresErrorCodes } from "../utils/dbErrorCheck.js";

/*
    One-time function to generate an admin user with specific email & password in the DB
    Reason: hash the password with bcrypt for future authentication
*/
async function generateAdmin(_req: Request, res: Response) {
    const adminMail = "admin@test.com";
    const adminPass = "test123";

    try {
        const hashedPassword = await bcrypt.hash(adminPass, 10);

        const adminCreation: QueryResult<AdminCreationResult> = await db.query(
            "INSERT INTO users (email, password_hash) VALUES ($1, $2) RETURNING id, email, created_at;",
            [adminMail, hashedPassword]
        );

        return res.status(201).json({
            message: "The admin was created successfully.",
            admin: adminCreation.rows[0],
        });
    } catch (error) {
        if (
            isPostgresError(error) &&
            error.code === PostgresErrorCodes.UNIQUE_VIOLATION
        ) {
            console.error("Error creating the admin: ", error);
            return res.status(409).json({
                message: "Admin already exists.",
                error: error.message,
            });
        }

        console.error("Error creating admin: ", error);
        return res.status(500).json({
            message: "Internal server error for admin creation.",
            error,
        });
    }
}

export default generateAdmin;