<?php

// === Example use ===
#addVideoToFediList('https://www.youtube.com/watch?v=dQw4w9WgXcQ');

function isYouTubeLink($url) {
    return preg_match('#^(https?://)?(www\.)?(youtube\.com/watch\?v=|youtu\.be/)[a-zA-Z0-9_-]{11}#', $url);
}

function addVideoToFediList($videoUrl) {
		
    $playlistId = @file_get_contents(__DIR__ .'/_credentials/fedilist_id.txt');
    if (!$playlistId) {
        echo "‼️ Error: FediList ID not found. Make sure fedilist_id.txt exists.\n";
        return false;
    }

    $token = @json_decode(file_get_contents(__DIR__ .'/_credentials/token.json'), true);
    if (!$token || !isset($token['access_token'])) {
        echo "‼️ Error: token.json missing or invalid. Authenticate first.\n";
        return false;
    }

    // Extract video ID from URL
    if (!preg_match('/(?:v=|\/)([a-zA-Z0-9_-]{11})/', $videoUrl, $matches)) {
        echo "⁉️ Invalid YouTube URL: $videoUrl\n";
        return false;
    }
    $videoId = $matches[1];

    // === Step 1: Check if video is already in playlist ===
    $checkUrl = "https://www.googleapis.com/youtube/v3/playlistItems?part=snippet&playlistId={$playlistId}&maxResults=50";
    $found = false;

    do {
        $ch = curl_init($checkUrl);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, [
            'Authorization: Bearer ' . $token['access_token'],
            'User-Agent: curl/7.64.1'
        ]);
        $response = curl_exec($ch);
        curl_close($ch);

        $data = json_decode($response, true);

        foreach ($data['items'] ?? [] as $item) {
            if (($item['snippet']['resourceId']['videoId'] ?? '') === $videoId) {
                echo "ℹ️ Video already in FediList: $videoId\n";
                return false;
            }
        }

        $checkUrl = $data['nextPageToken'] ?? false
            ? $checkUrl . '&pageToken=' . $data['nextPageToken']
            : false;

    } while ($checkUrl);

    // === Step 2: Add the video ===
    $postData = [
        'snippet' => [
            'playlistId' => $playlistId,
            'resourceId' => [
                'kind' => 'youtube#video',
                'videoId' => $videoId
            ]
        ]
    ];

    $ch = curl_init('https://www.googleapis.com/youtube/v3/playlistItems?part=snippet');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        'Authorization: Bearer ' . $token['access_token'],
        'Content-Type: application/json',
        'User-Agent: curl/7.64.1'
    ]);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($postData));
    $response = curl_exec($ch);
    curl_close($ch);

    $result = json_decode($response, true);

    if (isset($result['id'])) {
        echo "✅ Added video to FediList: $videoId\n";
        return true;
    } else {
        echo "‼️ Failed to add video:\n$response\n";
        return false;
    }
}

?>