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

/**
 * Complete/close a chat task (TaskTypeID = 2 only)
 * POST: { TaskID: int }
 */

$data = readJsonBody();
$taskID = (int) ($data['TaskID'] ?? 0);

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

try {
    $qTask = queryOne("
        SELECT ID, ClaimedByUserID, CompletedOn, OrderID, TaskTypeID
        FROM Tasks WHERE ID = ?
    ", [$taskID]);

    if (!$qTask) {
        apiAbort(['OK' => false, 'ERROR' => 'not_found', 'MESSAGE' => 'Task not found.']);
    }

    if ((int) $qTask['TaskTypeID'] !== 2) {
        apiAbort(['OK' => false, 'ERROR' => 'not_chat', 'MESSAGE' => 'This endpoint is only for chat tasks.']);
    }

    if (!empty(trim($qTask['CompletedOn'] ?? ''))) {
        apiAbort(['OK' => false, 'ERROR' => 'already_completed', 'MESSAGE' => 'Chat has already been closed.']);
    }

    queryTimed("UPDATE Tasks SET CompletedOn = NOW() WHERE ID = ?", [$taskID]);

    jsonResponse([
        'OK' => true,
        'ERROR' => '',
        'MESSAGE' => 'Chat closed successfully.',
        'TaskID' => $taskID,
    ]);

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