<?php

namespace App\Core;

class Response
{
    private int $statusCode = 200;
    private array $headers = [];

    /**
     * Set the HTTP status code.
     */
    public function setStatusCode(int $code): self
    {
        $this->statusCode = $code;
        return $this;
    }

    /**
     * Get the HTTP status code.
     */
    public function getStatusCode(): int
    {
        return $this->statusCode;
    }

    /**
     * Add a header.
     */
    public function header(string $name, string $value): self
    {
        $this->headers[$name] = $value;
        return $this;
    }

    /**
     * Set redirect path.
     */
    public function redirect(string $url): void
    {
        header("Location: " . $url);
        exit;
    }

    /**
     * Output JSON data.
     */
    public function json(mixed $data, int $code = 200): void
    {
        $this->setStatusCode($code);
        $this->header('Content-Type', 'application/json; charset=utf-8');
        
        $this->sendHeaders();
        http_response_code($this->statusCode);
        
        echo json_encode($data, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE);
        exit;
    }

    /**
     * Output raw HTML or string content.
     */
    public function html(string $content, int $code = 200): void
    {
        $this->setStatusCode($code);
        if (!isset($this->headers['Content-Type'])) {
            $this->header('Content-Type', 'text/html; charset=utf-8');
        }

        $this->sendHeaders();
        http_response_code($this->statusCode);
        
        echo $content;
    }

    /**
     * Send all buffered headers.
     */
    public function sendHeaders(): void
    {
        if (headers_sent()) {
            return;
        }

        foreach ($this->headers as $name => $value) {
            header("$name: $value");
        }
    }
}