<?php

declare(strict_types=1);

namespace App\Repository;

use PDO;

/**
 * Data access for the `users` table. Rows are returned as associative arrays.
 *
 * @phpstan-type UserRow array{id: int, email: string, password_hash: string, email_verified_at: string|null, verification_email_sent_at: string|null, created_at: string, updated_at: string}
 */
final class UserRepository
{
    public function __construct(private readonly PDO $pdo)
    {
    }

    /**
     * @return UserRow|null
     */
    public function findByEmail(string $email): ?array
    {
        $stmt = $this->pdo->prepare('SELECT * FROM users WHERE email = :email');
        $stmt->execute(['email' => $email]);

        $row = $stmt->fetch();

        return $row === false ? null : $this->cast($row);
    }

    /**
     * @return UserRow|null
     */
    public function findById(int $id): ?array
    {
        $stmt = $this->pdo->prepare('SELECT * FROM users WHERE id = :id');
        $stmt->execute(['id' => $id]);

        $row = $stmt->fetch();

        return $row === false ? null : $this->cast($row);
    }

    /**
     * @return UserRow
     */
    public function create(string $email, string $passwordHash): array
    {
        $stmt = $this->pdo->prepare(
            'INSERT INTO users (email, password_hash) VALUES (:email, :password_hash)'
        );
        $stmt->execute([
            'email' => $email,
            'password_hash' => $passwordHash,
        ]);

        /** @var UserRow $user */
        $user = $this->findById((int) $this->pdo->lastInsertId());

        return $user;
    }

    public function markEmailVerified(int $id): void
    {
        $this->pdo->prepare(
            "UPDATE users SET email_verified_at = strftime('%Y-%m-%dT%H:%M:%SZ', 'now'),
                    updated_at = strftime('%Y-%m-%dT%H:%M:%SZ', 'now')
             WHERE id = :id"
        )->execute(['id' => $id]);
    }

    /**
     * Apply a confirmed email change: set the address and mark it verified.
     */
    public function updateEmail(int $id, string $email): void
    {
        $this->pdo->prepare(
            "UPDATE users SET email = :email,
                    email_verified_at = strftime('%Y-%m-%dT%H:%M:%SZ', 'now'),
                    updated_at = strftime('%Y-%m-%dT%H:%M:%SZ', 'now')
             WHERE id = :id"
        )->execute(['email' => $email, 'id' => $id]);
    }

    public function markVerificationEmailSent(int $id): void
    {
        $this->pdo->prepare(
            "UPDATE users SET verification_email_sent_at = strftime('%Y-%m-%dT%H:%M:%SZ', 'now') WHERE id = :id"
        )->execute(['id' => $id]);
    }

    /**
     * @param array<string, mixed> $row
     * @return UserRow
     */
    private function cast(array $row): array
    {
        $row['id'] = (int) $row['id'];

        /** @var UserRow $row */
        return $row;
    }
}