<?php
require_once __DIR__ . '/../config/config_enhanced.php';
require_once __DIR__ . '/../config/config.php';

header('Content-Type: application/json; charset=utf-8');

if (function_exists('requireAuthentication')) requireAuthentication();

$input = json_decode(file_get_contents('php://input'), true) ?: $_POST;

// Allow single id or array of ids
$ids = [];
if (isset($input['id'])) {
    if (is_array($input['id'])) {
        $ids = array_map('intval', $input['id']);
    } else {
        $ids = [intval($input['id'])];
    }
}

if (empty($ids) || array_filter($ids) === []) {
    http_response_code(400);
    echo json_encode(['success' => false, 'error' => 'id is required']);
    exit;
}

try {
    $db = Database::getInstance();

    // Verify existence
    $placeholders = implode(',', array_fill(0, count($ids), '?'));
    $existing = $db->fetchAll("SELECT id, name, template_name FROM message_templates WHERE id IN ($placeholders)", $ids);
    if (!$existing) {
        http_response_code(404);
        echo json_encode(['success' => false, 'error' => 'No templates found for given id(s)']);
        exit;
    }

    // Start transaction
    $db->beginTransaction();
    try {
        $db->execute("DELETE FROM message_templates WHERE id IN ($placeholders)", $ids);

        // Log operator activity if session present
        try {
            $operatorId = $_SESSION['admin_user']['id'] ?? null;
            $now = date('Y-m-d H:i:s');
            foreach ($existing as $t) {
                $db->insert('operator_activity', [
                    'user_id' => null,
                    'operator_id' => $operatorId,
                    'action' => 'delete_template',
                    'details' => 'Deleted template: ' . ($t['name'] ?? $t['template_name'] ?? $t['id']),
                    'created_at' => $now
                ]);
            }
        } catch (Exception $e) {
            // ignore logging errors
        }

        $db->commit();

        echo json_encode(['success' => true, 'deleted' => array_map(function($t){ return $t['id']; }, $existing)]);
    } catch (Exception $e) {
        $db->rollback();
        http_response_code(500);
        echo json_encode(['success' => false, 'error' => 'Failed to delete templates: ' . $e->getMessage()]);
    }
} catch (Exception $e) {
    http_response_code(500);
    echo json_encode(['success' => false, 'error' => $e->getMessage()]);
}