<?php
defined('BASEPATH') or exit('No direct script access allowed');

require APPPATH . '/libraries/REST_Controller.php';

class Notification extends REST_Controller
{
    public function __construct()
    {
        parent::__construct();

        $this->load->helper(array('url'));
        $this->load->model('notification_model', 'notif');
        date_default_timezone_set('Asia/Jakarta');
    }

    /**
     * Simple health check for the notification API.
     */
    public function index_get()
    {
        $this->response(array(
            'message' => 'Notification API ready',
        ), 200);
    }

    /**
     * Generic FCM send endpoint.
     *
     * Expected JSON body:
     * {
     *   "target": "device_or_topic",
     *   "is_topic": false,
     *   "data": { ... arbitrary key/value pairs ... },
     *   "title": "optional notification title",
     *   "body": "optional notification body"
     * }
     */
    public function send_generic_post()
    {
        $raw = file_get_contents('php://input');
        $decoded = json_decode($raw, true);
        if (!is_array($decoded)) {
            $this->response(array(
                'code' => '400',
                'message' => 'invalid_json',
            ), 200);
            return;
        }

        $this->load->helper('fcm_v1_helper');

        // Always verify FCM token is ready before using Firebase service (as in test / panel send).
        if (!fcm_v1_validate_token()) {
            $this->response(array(
                'code' => '503',
                'message' => 'fcm_token_not_ready',
            ), 200);
            return;
        }

        $target = isset($decoded['target']) ? trim($decoded['target']) : '';
        $is_topic = !empty($decoded['is_topic']);
        $data = isset($decoded['data']) && is_array($decoded['data']) ? $decoded['data'] : array();
        $title = isset($decoded['title']) ? (string) $decoded['title'] : '';
        $body = isset($decoded['body']) ? (string) $decoded['body'] : '';

        if ($target === '' || empty($data)) {
            $this->response(array(
                'code' => '400',
                'message' => 'missing_target_or_data',
            ), 200);
            return;
        }

        $options = array();
        if ($title !== '' || $body !== '') {
            $options['title'] = $title;
            $options['body'] = $body;
        }

        if ($is_topic) {
            $result = $this->notif->send_generic_to_topic($target, $data, $options);
        } else {
            $result = $this->notif->send_generic_to_token($target, $data, $options);
        }

        if ($result === false) {
            $this->response(array(
                'code' => '500',
                'message' => 'fcm_send_failed_or_quota_exceeded',
            ), 200);
            return;
        }

        $this->response(array(
            'code' => '200',
            'message' => 'success',
        ), 200);
    }
}