<?php

namespace lib\Core\Http;

class Request extends Http
{
  private array $_datas = [];
  private array $_files = [];
  private array $_server = [];

  protected string $baseUrl;
  protected string $uri;

  public function __construct(array $params = [])
  {
    parent::__construct();

    $this->_datas = array_merge($_GET, $_POST, $params);
    $this->_files = $_FILES ?? [];
    $this->_server = $_SERVER ?? [];

    $this->baseUrl = $this->detectBaseUrl();
    $this->uri = $this->detectUri();
  }

  // --------------------
  // 요청 데이터 관련
  // --------------------
  public function all(): array
  {
    return $this->_datas;
  }

  public function get(?string $key = null, $default = null): mixed
  {
    if ($key === null) {
      return $this->all();
    }
    return $this->_datas[$key] ?? $default;
  }

  public function only(array $keys): array
  {
    return array_intersect_key($this->_datas, array_flip($keys));
  }

  public function has(string $key): bool
  {
    return array_key_exists($key, $this->_datas);
  }

  public function file(string $key): mixed
  {
    return $this->_files[$key] ?? null;
  }

  public function method(): string
  {
    return strtoupper($_SERVER['REQUEST_METHOD'] ?? 'GET');
  }

  public function isPost(): bool
  {
    return $this->method() === 'POST';
  }

  public function isGet(): bool
  {
    return $this->method() === 'GET';
  }

  // --------------------
  // URL/경로 관련
  // --------------------
  public function baseUrl(): string
  {
    return $this->baseUrl;
  }

  public function currentUrl(): string
  {
    return $this->baseUrl . '/' . ltrim($this->uri, '/');
  }

  public function previousUrl(): ?string
  {
    return $_SESSION['_previous_url'] ?? null;
  }

  public function segments(): array
  {
    return explode('/', trim($this->uri, '/'));
  }

  public function segment(int $n): ?string
  {
    $segments = $this->segments();
    return $segments[$n - 1] ?? null;
  }

  public function urlIs(string $pattern): bool
  {
    $uri = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);
    $pattern = str_replace('*', '.*', preg_quote($pattern, '/'));
    return preg_match("/^{$pattern}$/", $uri) === 1;
  }

  public function to(string $path): string
  {
    return rtrim($this->baseUrl, '/') . '/' . ltrim($path, '/');
  }

  // 현재 URI 반환 (도메인 제외)
  public function path(): string
  {
    return $this->uri;
  }

  // --------------------
  // 내부 URL 추출 로직
  // --------------------
  protected function detectUri(): string
  {
    $uri = $_SERVER['REQUEST_URI'] ?? '/';
    $scriptName = dirname($_SERVER['SCRIPT_NAME'] ?? '');
    $uri = str_replace($scriptName, '', $uri);
    $uri = strtok($uri, '?'); // 쿼리 스트링 제거
    return $uri;
  }

  protected function detectBaseUrl(): string
  {
    $scheme = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off') ? 'https' : 'http';
    $host = $_SERVER['HTTP_HOST'] ?? 'localhost';
    $scriptDir = rtrim(dirname($_SERVER['SCRIPT_NAME'] ?? ''), '/');
    return $scheme . '://' . $host . $scriptDir;
  }

  // --------------------
  // Validator 연동
  // --------------------
  public function validate(array $rules, array $messages = []): bool|array
  {
    $validator = new Validator();
    $validator->setData($this->all())->setRules($rules)->setMessages($messages);

    if (!$validator->run()) {
      return $validator->errors();
    }

    return true;
  }
}