<?php
// HttpHeadersBuilder.php
// Created: 2022-02-08
// Updated: 2022-02-27

namespace Index\Http;

use InvalidArgumentException;

class HttpHeadersBuilder {
    private array $headers = [];

    public function addHeader(string $name, mixed $value): void {
        $nameLower = strtolower($name);
        if(!isset($this->headers[$nameLower]))
            $this->headers[$nameLower] = [$name];
        $this->headers[$nameLower][] = $value;
    }

    public function setHeader(string $name, mixed $value): void {
        $this->headers[strtolower($name)] = [$name, $value];
    }

    public function removeHeader(string $name): void {
        unset($this->headers[strtolower($name)]);
    }

    public function hasHeader(string $name): bool {
        return isset($this->headers[strtolower($name)]);
    }

    public function toHeaders(): HttpHeaders {
        $headers = [];

        foreach($this->headers as $index => $lines)
            $headers[] = new HttpHeader(array_shift($lines), ...$lines);

        return new HttpHeaders($headers);
    }
}