<?php

namespace App\Models;

class User extends Model
{
    protected string $table = 'users';
    protected array $fillable = [
        'username',
        'email',
        'password',
        'role',
        'is_active',
        'last_login_at',
        'login_ip'
    ];

    protected array $hidden = [
        'password',
        'remember_token'
    ];

    protected array $casts = [
        'is_active' => 'bool',
        'last_login_at' => 'datetime'
    ];

    public function setPassword(string $password): void
    {
        $this->password = password_hash($password, PASSWORD_DEFAULT);
    }

    public function verifyPassword(string $password): bool
    {
        return password_verify($password, $this->password);
    }

    public function isAdmin(): bool
    {
        return $this->role === 'admin';
    }

    public function updateLastLogin(string $ip = null): bool
    {
        return $this->update($this->id, [
            'last_login_at' => date('Y-m-d H:i:s'),
            'login_ip' => $ip
        ]);
    }

    public static function findByUsername(\PDO $pdo, string $username): ?array
    {
        $stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username AND is_active = 1");
        $stmt->execute(['username' => $username]);
        return $stmt->fetch(\PDO::FETCH_ASSOC) ?: null;
    }

    public static function findByEmail(\PDO $pdo, string $email): ?array
    {
        $stmt = $pdo->prepare("SELECT * FROM users WHERE email = :email AND is_active = 1");
        $stmt->execute(['email' => $email]);
        return $stmt->fetch(\PDO::FETCH_ASSOC) ?: null;
    }

    public static function createAdmin(\PDO $pdo, string $username, string $email, string $password): int
    {
        $data = [
            'username' => $username,
            'email' => $email,
            'role' => 'admin',
            'is_active' => true
        ];

        $userModel = new self($pdo);
        $userModel->setPassword($password);
        $data['password'] = $userModel->password;

        return $userModel->create($data);
    }

    public static function getStats(\PDO $pdo): array
    {
        $stmt = $pdo->query("
            SELECT
                COUNT(*) as total_users,
                COUNT(CASE WHEN role = 'admin' THEN 1 END) as admin_users,
                COUNT(CASE WHEN last_login_at IS NOT NULL THEN 1 END) as active_users
            FROM users
        ");
        return $stmt->fetch(\PDO::FETCH_ASSOC);
    }
}