<?php

namespace App\Core;

/**
 * Handles HTTP requests, extracting query params, body data, and headers.
 */
class Request
{
    private string $method;
    private string $path;
    private array $queryParams;
    private array $bodyParams;
    private array $headers;

    // Explicit properties to store authentication details to avoid deprecation warnings in PHP 8.2+
    public ?int $user_id = null;
    public ?int $company_id = null;
    public ?string $role = null;

    public function __construct()
    {
        $this->method = strtoupper($_SERVER['REQUEST_METHOD'] ?? 'GET');
        
        // Extract clean path without query parameters
        $uri = $_SERVER['REQUEST_URI'] ?? '/';
        $path = explode('?', $uri)[0];
        $this->path = '/' . trim($path, '/');
        
        $this->queryParams = $_GET;
        $this->headers = $this->extractHeaders();
        $this->bodyParams = $this->parseBody();
    }

    public function getMethod(): string
    {
        return $this->method;
    }

    public function getPath(): string
    {
        return $this->path;
    }

    public function getQueryParams(): array
    {
        return $this->queryParams;
    }

    public function getQuery(string $key, $default = null)
    {
        return $this->queryParams[$key] ?? $default;
    }

    public function getBody(): array
    {
        return $this->bodyParams;
    }

    public function setBody(array $bodyParams): void
    {
        $this->bodyParams = $bodyParams;
    }

    public function setQueryParams(array $queryParams): void
    {
        $this->queryParams = $queryParams;
    }

    public function get(string $key, $default = null)
    {
        return $this->bodyParams[$key] ?? ($this->queryParams[$key] ?? $default);
    }

    public function getHeaders(): array
    {
        return $this->headers;
    }

    public function getHeader(string $key, $default = null): ?string
    {
        $keyLower = strtolower($key);
        return $this->headers[$keyLower] ?? $default;
    }

    private function extractHeaders(): array
    {
        $headers = [];
        foreach ($_SERVER as $name => $value) {
            if (substr($name, 0, 5) == 'HTTP_') {
                $headers[strtolower(str_replace('_', '-', substr($name, 5)))] = $value;
            } elseif ($name == 'CONTENT_TYPE') {
                $headers['content-type'] = $value;
            } elseif ($name == 'CONTENT_LENGTH') {
                $headers['content-length'] = $value;
            }
        }
        return $headers;
    }

    private function parseBody(): array
    {
        if ($this->method === 'GET') {
            return [];
        }

        $contentType = $this->getHeader('content-type', '');
        
        if (strpos($contentType, 'application/json') !== false) {
            $input = file_get_contents('php://input');
            $data = json_decode($input, true);
            return is_array($data) ? $data : [];
        }

        return $_POST;
    }
}