<?php
include_once $_SERVER['DOCUMENT_ROOT'] . '/../lib/partials.php';
include_once $_SERVER['DOCUMENT_ROOT'] . '/../lib/utils.php';
include_once $_SERVER['DOCUMENT_ROOT'] . '/../config.php';

function get_twitch_users(string $ids): array
{
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, "https://api.twitch.tv/helix/users?id=$ids");
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        'Authorization: Bearer ' . TWITCH_AUTHORIZATION_TOKEN,
        'Client-Id: ' . TWITCH_CLIENT_ID
    ]);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);

    $response = curl_exec($ch);
    $response = json_decode($response, true);

    curl_close($ch);

    return $response['data'] ?? [];
}

$channel = null;
$channels = [];

$db = new PDO(DB_URL, DB_USER, DB_PASS);

if (isset($_GET['alias_id'])) {
    $stmt = $db->prepare('SELECT c.*, cp.*
        FROM channels c
        LEFT JOIN channel_preferences cp ON cp.id = c.id
        WHERE c.alias_id = ?
    ');
    $stmt->execute([$_GET['alias_id']]);
    $channel = $stmt->fetch(PDO::FETCH_ASSOC) ?: null;

    if (!isset($channel)) {
        http_response_code(404);
        exit;
    }

    // fetching custom commands
    $stmt = $db->prepare('SELECT *
        FROM custom_commands
        WHERE channel_id = ?
    ');
    $stmt->execute([$channel['id']]);
    $channel['commands'] = $stmt->fetchAll(PDO::FETCH_ASSOC);

    // fetching timers
    $stmt = $db->prepare('SELECT *
        FROM timers
        WHERE channel_id = ?
    ');
    $stmt->execute([$channel['id']]);
    $channel['timers'] = $stmt->fetchAll(PDO::FETCH_ASSOC);

    // fetching events
    $stmt = $db->prepare('SELECT e.*, COUNT(es.id) as subscription_count
        FROM events e
        LEFT JOIN event_subscriptions es ON es.event_id = e.id
        WHERE e.channel_id = ?
        GROUP BY e.id
        ORDER BY subscription_count DESC
    ');
    $stmt->execute([$channel['id']]);
    $channel['events'] = $stmt->fetchAll(PDO::FETCH_ASSOC);

    // fetching event names
    $twitch_types = [0, 1, 2, 3, 8];
    $channel_ids = [];
    foreach ($channel['events'] as &$e) {
        if (in_array($e['event_type'], $twitch_types)) {
            array_push($channel_ids, $e['name']);
        }

        $e['event_type_translated'] = match ($e['event_type']) {
            0 => 'Live (Twitch)',
            1 => 'Offline (Twitch)',
            2 => 'Title change (Twitch)',
            3 => 'Game change (Twitch)',
            4 => 'Live (Kick)',
            5 => 'Offline (Kick)',
            6 => 'Title change (Kick)',
            7 => 'Game change (Kick)',
            8 => 'Chat message (Twitch)',
            10 => 'Emote creation (7TV)',
            11 => 'Emote deletion (7TV)',
            12 => 'Emote update (7TV)',
            13 => 'Emote creation (BTTV)',
            14 => 'Emote deletion (BTTV)',
            15 => 'Emote update (BTTV)',
            40 => 'GitHub',
            default => 'Custom'
        };
    }
    unset($e);
    if (!empty($channel_ids)) {
        $event_users = get_twitch_users(implode('&id=', $channel_ids));
        foreach ($event_users as $user) {
            foreach ($channel['events'] as &$e) {
                if ($e['name'] == $user['id']) {
                    $e['name'] = $user['login'];
                }
            }
            unset($e);
        }
    }

    if ($response = get_twitch_users($channel['alias_id'])) {
        $user = $response[0];
        $channel['pfp'] = $user['profile_image_url'];
        $channel['description'] = $user['description'] ?: null;
    }

    $has_content = !empty($channel['events']) || !empty($channel['commands']) || !empty($channel['timers']);
} else if (!SHOW_CHANNEL_LIST) {
    http_response_code(403);
    exit;
} else {
    $stmt = $db->query('SELECT c.alias_id, c.alias_name FROM channels c
    INNER JOIN channel_preferences cp ON cp.id = c.id
    WHERE c.opted_out_at IS NULL AND cp.silent_mode = FALSE ORDER BY c.joined_at DESC');
    $stmt->execute();

    $channels = $stmt->fetchAll(PDO::FETCH_ASSOC) ?: [];
}

// fetching user pfps
if (!empty($channels)) {
    $channel_ids = [];
    foreach ($channels as $c) {
        array_push($channel_ids, $c['alias_id']);
    }

    $response = get_twitch_users(implode('&id=', $channel_ids));

    if (!empty($response)) {
        foreach ($response as $c) {
            $index = array_search($c['id'], array_column($channels, 'alias_id'));
            $channels[$index]['pfp'] = $c['profile_image_url'];
        }
    }
}
?>

<html>

<head>
    <title>
        <?php if ($channel): ?>
            <?= $channel['alias_name'] ?>
        <?php else: ?>
            Channels
        <?php endif; ?>
        - <?= BOT_USERNAME_FORMATTED ?>
    </title>
    <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
    <link rel="stylesheet" href="/static/style.css">
    <link rel="shortcut icon" href="/static/favicon.ico" type="image/x-icon">
</head>

<body>
    <main>
        <?php html_navigation_bar() ?>
        <content class="gap-16">
            <?php if (isset($channel)): ?>
                <section class="card row p-16">
                    <?php if (isset($channel['pfp'])): ?>
                        <div class="icon">
                            <img src="<?= $channel['pfp'] ?>" alt="">
                        </div>
                    <?php endif; ?>
                    <div class="column gap-8 grow">
                        <h1>About <?= $channel['alias_name'] ?></h1>
                        <?php if (isset($channel['description'])): ?>
                            <p><i><?= $channel['description'] ?></i></p>
                        <?php endif; ?>
                        <div class="row gap-16 font-small">
                            <p>Language: <img src="/static/img/icons/flags/<?= $channel['language'] ?>.png" alt="">
                                <?= ucfirst($channel['language']) ?></p>
                            <p>Prefix: <b><?= $channel['prefix'] ?></b></p>
                            <?php if ($channel['silent_mode']): ?>
                                <p>Silent mode</p>
                            <?php endif; ?>
                        </div>
                    </div>
                    <div class="column gap-8">
                        <p><img src="/static/img/icons/door_in.png" alt=""> Joined
                            <?= format_timestamp(time() - strtotime($channel['joined_at'])) ?> ago
                        </p>
                        <?php if (isset($channel['opted_out_at'])): ?>
                            <p class="red box text-center"><img src="/static/img/icons/door_out.png" alt=""> Opted out!</p>
                        <?php endif; ?>
                    </div>
                </section>

                <!-- CHANNEL CONTENT -->
                <?php if ($has_content): ?>
                    <section class="box" id="channel-content">
                        <div class="tabs row gap-8" id="channel-content-tabs" style="display: none">
                            <?php if (!empty($channel['events'])): ?>
                                <button class="tab" id="events-button">Events</button>
                            <?php endif; ?>
                            <?php if (!empty($channel['commands'])): ?>
                                <button class="tab" id="commands-button">Custom commands</button>
                            <?php endif; ?>

                            <?php if (!empty($channel['timers'])): ?>
                                <button class="tab" id="timers-button">Timers</button>
                            <?php endif; ?>

                        </div>
                        <div class="content">
                            <?php if (!empty($channel['events'])): ?>
                                <!-- Events -->
                                <div class="tab-content column" id="events">
                                    <h2>Events</h2>
                                    <hr>
                                    <table>
                                        <tr>
                                            <th>Name</th>
                                            <th>Type</th>
                                            <th>Message</th>
                                            <th>Massping</th>
                                            <th>Subscribers</th>
                                        </tr>
                                        <?php foreach ($channel['events'] as $e): ?>
                                            <tr>
                                                <td>
                                                    <?php if (in_array($e['event_type'], $twitch_types)): ?>
                                                        <a href="https://twitch.tv/<?= $e['name'] ?>"><?= $e['name'] ?></a>
                                                    <?php elseif ($e['event_type'] == 40): ?>
                                                        <a href="https://github.com/<?= $e['name'] ?>"><?= $e['name'] ?></a>
                                                    <?php else: ?>
                                                        <?= $e['name'] ?>
                                                    <?php endif; ?>
                                                </td>
                                                <td><?= $e['event_type_translated'] ?></td>
                                                <td><?= $e['message'] ?></td>
                                                <td><?= $e['is_massping'] ? '✅' : '❌' ?></td>
                                                <td><?= $e['subscription_count'] ?></td>
                                            </tr>
                                        <?php endforeach; ?>
                                    </table>
                                </div>
                            <?php endif; ?>

                            <?php if (!empty($channel['commands'])): ?>
                                <!-- Commands -->
                                <div class="tab-content column" id="commands">
                                    <h2>Custom commands</h2>
                                    <hr>
                                    <table>
                                        <tr>
                                            <th>Name</th>
                                            <th>Message</th>
                                        </tr>
                                        <?php foreach ($channel['commands'] as $c): ?>
                                            <tr>
                                                <td><?= $c['name'] ?></td>
                                                <td><?= $c['message'] ?></td>
                                            </tr>
                                        <?php endforeach; ?>
                                    </table>
                                </div>
                            <?php endif; ?>

                            <?php if (!empty($channel['timers'])): ?>
                                <!-- Timers -->
                                <div class="tab-content column" id="timers">
                                    <h2>Timers</h2>
                                    <hr>
                                    <table>
                                        <tr>
                                            <th>Name</th>
                                            <th>Message</th>
                                            <th>Interval</th>
                                            <th>Last executed</th>
                                        </tr>
                                        <?php foreach ($channel['timers'] as $t): ?>
                                            <tr>
                                                <td><?= $t['name'] ?></td>
                                                <td><?= $t['message'] ?> </td>
                                                <td><?= format_timestamp($t['interval_sec']) ?></td>
                                                <td><?= format_timestamp(time() - strtotime($t['last_executed_at'])) ?> ago</td>
                                            </tr>
                                        <?php endforeach; ?>
                                    </table>
                                </div>
                            <?php endif; ?>
                        </div>
                    </section>
                <?php else: ?>
                    <p class="text-center"><i>Nothing found...</i></p>
                <?php endif; ?>
            <?php elseif (empty($channels)): ?>
                <section class="column justify-center align-center background-colorful p-24">
                    <h1>No one has joined yet... &semi;&lpar;</h1>
                    <a href="/!join">Be the first one&excl;</a>
                </section>
            <?php else: ?>
                <section class="column justify-center align-center background-colorful p-24">
                    <h1><?= count($channels) ?> channels have already joined us</h1>
                    <a href="/!join">Check out the &excl;join command to participate&excl;</a>
                </section>
                <section class="grid-4 gap-16">
                    <?php foreach ($channels as $c): ?>
                        <a href="/channels/?alias_id=<?= $c['alias_id'] ?>" class="card justify-center align-center">
                            <div class="icon">
                                <img src="<?= $c['pfp'] ?? '/static/img/default_avatar.webp' ?>" alt="">
                            </div>
                            <p><b><?= $c['alias_name'] ?></b></p>
                        </a>
                    <?php endforeach; ?>
                </section>
            <?php endif; ?>
        </content>
    </main>

    <?php html_footer() ?>
</body>

<?php if (isset($channel) && $has_content): ?>
    <script>
        for (const elem of document.querySelectorAll('#channel-content h2, #channel-content hr')) {
            elem.remove();
        }

        document.getElementById('channel-content-tabs').style.display = 'flex';

        const tabButtons = document.querySelectorAll('#channel-content-tabs button');
        const tabContent = document.querySelectorAll('.tab-content');

        function enableTab(name) {
            tabButtons.forEach(x => {
                if (x.getAttribute('id') == name + '-button') {
                    x.setAttribute('disabled', '');
                } else {
                    x.removeAttribute('disabled');
                }
            });

            tabContent.forEach(x => {
                x.style.display = x.getAttribute('id') == name ? 'flex' : 'none';
            });
        }

        enableTab(tabButtons[0].getAttribute('id').split('-')[0]);

        for (const tabButton of tabButtons) {
            const id = tabButton.getAttribute('id');
            const name = id.split('-')[0];
            tabButton.addEventListener('click', () => enableTab(name));
        }
    </script>
<?php endif; ?>

</html>