<?php

namespace Controllers;

use Libs\Payload;
use Libs\Validator;
use Models\UserModel;
use Psr\Http\Message\ServerRequestInterface;

class MeChangePasswordController
{
    private UserModel $userModel;

    public function __construct()
    {
        $this->userModel = new UserModel();
    }

    public function __invoke(ServerRequestInterface $request)
    {
        $userId = (int) ($request->getAttribute('user_id') ?? 0);
        if ($userId <= 0) {
            return Payload::fail('Unauthorized: Missing authenticated user', [], 'E_VALIDATE', 401);
        }

        $body = json_decode((string) $request->getBody(), true) ?: [];
        $currentPassword = (string) ($body['currentPassword'] ?? '');
        $newPassword = (string) ($body['newPassword'] ?? '');
        $confirmPassword = (string) ($body['confirmPassword'] ?? '');

        $validator = (new Validator([
            'currentPassword' => $currentPassword,
            'newPassword' => $newPassword,
            'confirmPassword' => $confirmPassword,
        ]))
            ->required('currentPassword')->minLength('currentPassword', 8)->maxLength('currentPassword', 255)
            ->required('newPassword')->minLength('newPassword', 8)->maxLength('newPassword', 255)
            ->required('confirmPassword')->minLength('confirmPassword', 8)->maxLength('confirmPassword', 255);

        if ($validator->fails()) {
            return Payload::fail($validator->firstError() ?? 'Invalid payload', [], 'E_VALIDATE', 400);
        }

        if ($newPassword !== $confirmPassword) {
            return Payload::fail('New password and confirmation do not match', [], 'E_VALIDATE', 400);
        }

        if ($currentPassword === $newPassword) {
            return Payload::fail('New password must be different from current password', [], 'E_VALIDATE', 400);
        }

        $result = $this->userModel->changePassword($userId, $currentPassword, $newPassword);

        if ($result === 'not_found') {
            return Payload::fail('User not found', [], 'E_NOT_FOUND', 404);
        }

        if ($result === 'invalid_current_password') {
            return Payload::fail('Current password is invalid', [], 'E_VALIDATE', 400);
        }

        if ($result === 'error') {
            return Payload::fail('Failed to update password', [], 'E_GENERIC', 500);
        }

        return Payload::ok([], 'S_OK', 'Password updated.');
    }
}