<?php

class video
{
    static public function stream(array $file)
    {
        $filePath = "../video/".$file["md5"] . ".mp4";
        
        if (!file_exists($filePath)) {
            header("HTTP/1.0 404 Not Found");
            exit;
        }

        $fileSize = filesize($filePath);
        $range = 0;
        $length = $fileSize;

        // Gestion des requêtes partielles (Range)
        if (isset($_SERVER['HTTP_RANGE'])) {
            $range = $_SERVER['HTTP_RANGE'];
            $range = str_replace('bytes=', '', $range);
            $range = explode('-', $range);
            $start = intval($range[0]);

            $end = isset($range[1]) && is_numeric($range[1]) ? intval($range[1]) : $fileSize - 1;

            if ($start > $end || $end >= $fileSize) {
                header("HTTP/1.1 416 Requested Range Not Satisfiable");
                exit;
            }

            $length = $end - $start + 1;
            header("HTTP/1.1 206 Partial Content");
            header("Content-Range: bytes $start-$end/$fileSize");
        } else {
            $start = 0;
            $end = $fileSize - 1;
        }

        // En-têtes HTTP pour le streaming
        header("Content-Type: " . $file["type"]);
        header("Content-Length: $length");
        header("Accept-Ranges: bytes");

        $fp = fopen($filePath, 'rb');
        fseek($fp, $start);
        $bufferSize = 1024 * 8;
        $bytesSent = 0;

        // Lecture de la vidéo par morceaux
        while (!feof($fp) && ($bytesSent < $length)) {
            $buffer = fread($fp, $bufferSize);
            echo $buffer;
            flush(); // Vide le tampon de sortie
            $bytesSent += strlen($buffer);
        }

        fclose($fp);
    }
}