<?php

namespace App\Model;

use App\Gateway\AuthGateway;
use App\Validation\FieldValidationFail;
use App\Validation\ValidationFail;

class AuthModel {
    private AuthGateway $gateway;
    /**
     * @param AuthGateway $gateway
     */
    public function __construct(AuthGateway $gateway) {
        $this->gateway = $gateway;
    }


    /**
     * @param string $username
     * @param string $password
     * @param string $confirmPassword
     * @param string $email
     * @return ValidationFail[]
     */
    public function register(string $username, string $password, string $confirmPassword, string $email): array {
        $errors = [];

        if ($password != $confirmPassword) {
            $errors[] = new FieldValidationFail("confirmpassword", "password and password confirmation are not equals");
        }

        if ($this->gateway->mailExist($email)) {
            $errors[] = new FieldValidationFail("email", "email already exist");
        }

        if(empty($errors)) {
            $hash = password_hash($password, PASSWORD_DEFAULT);
            $this->gateway->insertAccount($username, $hash, $email);
        }

        return $errors;
    }

    /**
     * @param string $email
     * @return array<string,string>|null
     */
    public function getUserFields(string $email): ?array {
        return $this->gateway->getUserFields($email);
    }


    /**
     * @param string $email
     * @param string $password
     * @return ValidationFail[] $errors
     */
    public function login(string $email, string $password): array {
        $errors = [];

        if (!$this->gateway->mailExist($email)) {
            $errors[] = new FieldValidationFail("email", "email doesnt exists");
            return $errors;
        }
        $hash = $this->gateway->getUserHash($email);

        if (!password_verify($password, $hash)) {
            $errors[] = new FieldValidationFail("password", "invalid password");
        }

        return $errors;
    }


}