#!/usr/bin/env php
<?php

/**
 * Recurring Tickets Cron Job
 *
 * Run this script via cron to automatically create tickets from recurring schedules.
 * Recommended: run every 5-15 minutes.
 *
 * Example crontab entry (minute 10 of every hour):
 *   10 * * * * /usr/bin/php /path/to/cron/create_recurring_tickets.php >> /var/log/recurring_tickets.log 2>&1
 */

// Change to project root directory
chdir(dirname(__DIR__));

// Include required files
require_once 'config/config.php';
require_once 'helpers/Database.php';
require_once 'helpers/NotificationHelper.php';
require_once 'models/RecurringTicketModel.php';
require_once 'models/TicketModel.php';
require_once 'models/AuditLogModel.php';
require_once 'models/StatsModel.php';

// Log function
function logMessage($message)
{
    echo "[" . date('Y-m-d H:i:s') . "] " . $message . "\n";
}

logMessage("Starting recurring tickets cron job");

try {
    // Create database connection (Database::getConnection sets utf8mb4 so
    // non-ASCII titles/descriptions aren't corrupted on insert).
    $conn = Database::getConnection();

    // Initialize models
    $recurringModel = new RecurringTicketModel($conn);
    $ticketModel = new TicketModel($conn);
    $auditLog = new AuditLogModel($conn);

    // Get all due recurring tickets
    $dueTickets = $recurringModel->getDueRecurringTickets();
    logMessage("Found " . count($dueTickets) . " recurring tickets due for creation");

    $created = 0;
    $errors = 0;

    foreach ($dueTickets as $recurring) {
        logMessage("Processing recurring ticket ID: " . $recurring['recurring_id']);

        try {
            // Claim the schedule FIRST (atomic advance of next_run_at). If another
            // cron run already claimed it, or it's no longer due, skip it — this
            // prevents duplicate-ticket floods if a later step throws.
            if (!$recurringModel->claimForRun($recurring['recurring_id'])) {
                logMessage("Skipped (already claimed or not due): " . $recurring['recurring_id']);
                continue;
            }

            // Prepare ticket data
            $ticketData = [
                'title' => processTemplate($recurring['title_template']),
                'description' => processTemplate($recurring['description_template']),
                'category' => $recurring['category'],
                'type' => $recurring['type'],
                'priority' => $recurring['priority'],
                'status' => 'Open'
            ];

            // Create the ticket
            $result = $ticketModel->createTicket($ticketData, $recurring['created_by']);

            if ($result['success']) {
                $ticketId = $result['ticket_id'];
                logMessage("Created ticket: " . $ticketId);

                // Assign to user if specified. assignTicket() requires a non-null
                // "assigned_by"; fall back to the assignee when created_by is null
                // (recurring schedules may have no creator).
                if (!empty($recurring['assigned_to'])) {
                    $assignedBy = (int)($recurring['created_by'] ?? $recurring['assigned_to']);
                    $ticketModel->assignTicket($ticketId, (int)$recurring['assigned_to'], $assignedBy);
                }

                // Log to audit
                $auditLog->log(
                    $recurring['created_by'],
                    'create',
                    'ticket',
                    $ticketId,
                    ['source' => 'recurring', 'recurring_id' => $recurring['recurring_id']]
                );

                // Fire the same Matrix "ticket created" notification the manual and
                // external-API create paths send, so recurring tickets aren't silent.
                NotificationHelper::sendTicketNotification($ticketId, $ticketData, 'automated');

                $created++;
            } else {
                logMessage("ERROR: Failed to create ticket - " . ($result['error'] ?? 'Unknown error'));
                $errors++;
            }
        } catch (Exception $e) {
            logMessage("ERROR: Exception processing recurring ticket - " . $e->getMessage());
            $errors++;
        }
    }

    // Ticket counts changed — invalidate the cached dashboard stats once for the
    // whole run (mirrors the manual/API create paths, which invalidate per create).
    if ($created > 0) {
        (new StatsModel($conn))->invalidateCache();
    }

    logMessage("Completed: Created $created tickets, $errors errors");

    Database::close();
} catch (Exception $e) {
    logMessage("FATAL ERROR: " . $e->getMessage());
    exit(1);
}

/**
 * Process template variables
 */
function processTemplate($template)
{
    if (empty($template)) {
        return $template;
    }

    $replacements = [
        '{{date}}' => date('Y-m-d'),
        '{{time}}' => date('H:i:s'),
        '{{datetime}}' => date('Y-m-d H:i:s'),
        '{{week}}' => date('W'),
        '{{month}}' => date('F'),
        '{{year}}' => date('Y'),
        '{{day_of_week}}' => date('l'),
        '{{day}}' => date('d'),
    ];

    return str_replace(array_keys($replacements), array_values($replacements), $template);
}

logMessage("Cron job finished");