<?php
/**
 * GET /api/hub/channels/members.php
 *
 * List members of a channel.
 *
 * Query params:
 *   ChannelID  int  REQUIRED
 *
 * Response: { OK: true, Members: [...] }
 */

require_once __DIR__ . '/../../helpers.php';

if ($_SERVER['REQUEST_METHOD'] !== 'GET') {
    jsonResponse(['OK' => false, 'ERROR' => 'method_not_allowed'], 405);
}

$channelId = (int) ($_GET['ChannelID'] ?? 0);
if ($channelId <= 0) {
    jsonResponse(['OK' => false, 'ERROR' => 'channel_id_required']);
}

// Verify channel exists
$channel = queryOne("SELECT ID FROM Hub_Channels WHERE ID = ?", [$channelId]);
if (!$channel) {
    jsonResponse(['OK' => false, 'ERROR' => 'channel_not_found'], 404);
}

$members = queryTimed(
    "SELECT m.AgentAddress, m.Role, m.JoinedAt, m.LastViewedAt,
            a.AgentName, a.AgentType, a.Role AS AgentRole, a.IsActive
     FROM Hub_ChannelMembers m
     LEFT JOIN Sprinter_Agents a ON a.FullAddress = m.AgentAddress
     WHERE m.ChannelID = ?
     ORDER BY m.JoinedAt ASC",
    [$channelId]
);

$list = [];
foreach ($members as $m) {
    $list[] = [
        'AgentAddress'  => $m['AgentAddress'],
        'AgentName'     => $m['AgentName'] ?? '',
        'AgentType'     => $m['AgentType'] ?? '',
        'AgentRole'     => $m['AgentRole'] ?? '',
        'IsActive'      => isset($m['IsActive']) ? (bool) $m['IsActive'] : null,
        'ChannelRole'   => $m['Role'],
        'JoinedAt'      => toISO8601($m['JoinedAt']),
        'LastViewedAt'  => $m['LastViewedAt'] ? toISO8601($m['LastViewedAt']) : null,
    ];
}

jsonResponse(['OK' => true, 'Members' => $list, 'Total' => count($list)]);