<?php
require_once __DIR__ . '/../helpers.php';
runAuth();

/**
 * Check for an active (uncompleted) chat task at a service point
 * POST: { BusinessID, ServicePointID }
 */

$data = readJsonBody();
$businessID = (int) ($data['BusinessID'] ?? 0);
$servicePointID = (int) ($data['ServicePointID'] ?? 0);

if ($businessID <= 0) {
    apiAbort(['OK' => false, 'ERROR' => 'missing_params', 'MESSAGE' => 'BusinessID is required']);
}

if ($servicePointID <= 0) {
    jsonResponse([
        'OK' => true,
        'HAS_ACTIVE_CHAT' => false,
        'TASK_ID' => 0,
        'TASK_TITLE' => '',
    ]);
}

try {
    $qChat = queryOne("
        SELECT t.ID, t.Title,
               (SELECT MAX(cm.CreatedOn) FROM ChatMessages cm WHERE cm.TaskID = t.ID) as LastMessageTime
        FROM Tasks t
        WHERE t.BusinessID = ?
          AND t.TaskTypeID = 2
          AND t.CompletedOn IS NULL
          AND t.SourceType = 'servicepoint'
          AND t.SourceID = ?
        ORDER BY
          CASE WHEN t.ClaimedByUserID > 0 THEN 0 ELSE 1 END,
          t.CreatedOn DESC
        LIMIT 1
    ", [$businessID, $servicePointID]);

    if ($qChat) {
        jsonResponse([
            'OK' => true,
            'HAS_ACTIVE_CHAT' => true,
            'TASK_ID' => (int) $qChat['ID'],
            'TASK_TITLE' => $qChat['Title'],
        ]);
    } else {
        jsonResponse([
            'OK' => true,
            'HAS_ACTIVE_CHAT' => false,
            'TASK_ID' => 0,
            'TASK_TITLE' => '',
        ]);
    }

} catch (Exception $e) {
    jsonResponse(['OK' => false, 'ERROR' => 'server_error', 'MESSAGE' => $e->getMessage()]);
}