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

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

class Map extends REST_Controller
{
    public function __construct()
    {
        parent::__construct();
        $this->load->helper(array('url', 'maps_helper', 'quota_limiter'));
        date_default_timezone_set('Asia/Jakarta');
    }

    public function index_get()
    {
        $this->response(array(
            'message' => 'Map API ready',
        ), 200);
    }

    /**
     * POST /api/map/directions
     * Body: { "origin_lat": 0.0, "origin_lng": 0.0, "dest_lat": 0.0, "dest_lng": 0.0, "mode": "driving" }
     */
    public function directions_post()
    {
        // Simple per-IP quota limiting for map directions.
        $hour_limit = (defined('MAPS_LIMIT_PER_HOUR') && MAPS_LIMIT_PER_HOUR !== '') ? (int) MAPS_LIMIT_PER_HOUR : 1000;
        $day_limit  = (defined('MAPS_LIMIT_PER_DAY') && MAPS_LIMIT_PER_DAY !== '') ? (int) MAPS_LIMIT_PER_DAY : 5000;
        $limits = array(
            'hour' => $hour_limit,
            'day' => $day_limit,
        );
        $key = 'maps:ip:' . $this->input->ip_address();
        if (!quota_limiter_allow($key, $limits)) {
            $this->response(array(
                'code' => '429',
                'message' => 'maps_quota_exceeded',
            ), 200);
            return;
        }

        $data = json_decode(file_get_contents('php://input'), true);
        if (!is_array($data)) {
            $this->response(array(
                'code' => '400',
                'message' => 'invalid_json',
            ), 200);
            return;
        }

        if (!isset($data['origin_lat'], $data['origin_lng'], $data['dest_lat'], $data['dest_lng'])) {
            $this->response(array(
                'code' => '400',
                'message' => 'missing_coordinates',
            ), 200);
            return;
        }

        $mode = isset($data['mode']) && is_string($data['mode']) ? $data['mode'] : 'driving';

        $result = maps_directions(
            (float) $data['origin_lat'],
            (float) $data['origin_lng'],
            (float) $data['dest_lat'],
            (float) $data['dest_lng'],
            $mode
        );

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

        // Proxy Google Directions JSON structure directly so clients can parse as before.
        $this->response($result, 200);
    }

    /**
     * POST /api/map/geocode
     * Body: { "lat": 0.0, "lng": 0.0 }
     */
    public function geocode_post()
    {
        $hour_limit = (defined('MAPS_LIMIT_PER_HOUR') && MAPS_LIMIT_PER_HOUR !== '') ? (int) MAPS_LIMIT_PER_HOUR : 1000;
        $day_limit  = (defined('MAPS_LIMIT_PER_DAY') && MAPS_LIMIT_PER_DAY !== '') ? (int) MAPS_LIMIT_PER_DAY : 5000;
        $limits = array(
            'hour' => $hour_limit,
            'day' => $day_limit,
        );
        $key = 'maps:ip:' . $this->input->ip_address() . ':geocode';
        if (!quota_limiter_allow($key, $limits)) {
            $this->response(array(
                'code' => '429',
                'message' => 'maps_quota_exceeded',
            ), 200);
            return;
        }

        $data = json_decode(file_get_contents('php://input'), true);
        if (!is_array($data)) {
            $this->response(array(
                'code' => '400',
                'message' => 'invalid_json',
            ), 200);
            return;
        }

        if (!isset($data['lat'], $data['lng'])) {
            $this->response(array(
                'code' => '400',
                'message' => 'missing_lat_lng',
            ), 200);
            return;
        }

        $result = maps_geocode((float) $data['lat'], (float) $data['lng']);
        if ($result === null) {
            $this->response(array(
                'code' => '500',
                'message' => 'maps_error',
            ), 200);
            return;
        }

        // Proxy Google Geocode JSON structure directly.
        $this->response($result, 200);
    }
}