<?php

namespace app\api\server;

use think\Db;
use think\facade\Cache;
use think\facade\Config;

class CityService
{
    // 腾讯地图API Key
    private $tencentMapKey = 'EVOBZ-VX7YU-QKJVR-BVESA-AVFT3-7JBWG';
    
    public function list()
    {
        $cacheKey = 'city_cache_keys';
        if (Cache::store('redis')->has($cacheKey)) {
            return Cache::store('redis')->get($cacheKey);
        }
        //查询市级名称
        $data = Db::name('dev_region')
            ->order('id', 'asc')
            ->field('id,parent_id,name')
            ->where('level',1)
            ->select();
        if ($data) {
            Cache::store('redis')->set($cacheKey, $data);
        }
        return $data;
    }

    /**
     * 根据经纬度获取所在城市
     * @param float $lat 纬度
     * @param float $lng 经度
     * @return array
     */
    public function getCityByLocation($lat, $lng)
    {
        // 参数验证
        if (empty($lat) || empty($lng)) {
            return [
                'success' => false,
                'msg' => '经纬度参数不能为空',
                'data' => null
            ];
        }

        // 验证经纬度范围
        if (!is_numeric($lat) || !is_numeric($lng)) {
            return [
                'success' => false,
                'msg' => '经纬度格式错误',
                'data' => null
            ];
        }

        $lat = floatval($lat);
        $lng = floatval($lng);

        if ($lat < -90 || $lat > 90 || $lng < -180 || $lng > 180) {
            return [
                'success' => false,
                'msg' => '经纬度范围错误',
                'data' => null
            ];
        }

        // 生成缓存key
        $cacheKey = 'city_location_' . md5($lat . '_' . $lng);
        
        // 尝试从缓存获取
        if (Cache::store('redis')->has($cacheKey)) {
            $cachedData = Cache::store('redis')->get($cacheKey);
            return [
                'success' => true,
                'msg' => '获取成功',
                'data' => $cachedData
            ];
        }

        // 调用腾讯地图逆地理编码API
        $apiUrl = 'https://apis.map.qq.com/ws/geocoder/v1/';
        $params = [
            'location' => $lat . ',' . $lng,
            'key' => $this->tencentMapKey,
            'get_poi' => 0
        ];

        $url = $apiUrl . '?' . http_build_query($params);

        // 使用curl请求
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
        curl_setopt($ch, CURLOPT_TIMEOUT, 10);
        
        $response = curl_exec($ch);
        $httpCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        $error = curl_error($ch);
        curl_close($ch);

        if ($error) {
            return [
                'success' => false,
                'msg' => '请求失败：' . $error,
                'data' => null
            ];
        }

        if ($httpCode !== 200) {
            return [
                'success' => false,
                'msg' => 'API请求失败，HTTP状态码：' . $httpCode,
                'data' => null
            ];
        }

        $result = json_decode($response, true);

        if (empty($result) || $result['status'] !== 0) {
            return [
                'success' => false,
                'msg' => isset($result['message']) ? $result['message'] : '获取城市信息失败',
                'data' => null
            ];
        }

        // 解析返回数据
        $addressComponent = $result['result']['address_component'] ?? [];
        $cityName = $addressComponent['city'] ?? '';
        $provinceName = $addressComponent['province'] ?? '';
        $districtName = $addressComponent['district'] ?? '';
        $adcode = $addressComponent['adcode'] ?? '';

        // 如果城市名称为空，尝试使用区县名称
        if (empty($cityName) && !empty($districtName)) {
            $cityName = $districtName;
        }

        // 查询数据库中的城市ID
        $cityId = null;
        $cityInfo = null;
        
        if (!empty($cityName)) {
            // 先尝试精确匹配
            $cityInfo = Db::name('dev_region')
                ->where('name', $cityName)
                ->where('level', 2) // 市级
                ->find();
            
            // 如果精确匹配失败，尝试模糊匹配
            if (empty($cityInfo)) {
                $cityInfo = Db::name('dev_region')
                    ->where('name', 'like', '%' . $cityName . '%')
                    ->where('level', 2)
                    ->find();
            }
            
            if ($cityInfo) {
                $cityId = $cityInfo['id'];
            }
        }

        $data = [
            'city_name' => $cityName,
            'province_name' => $provinceName,
            'district_name' => $districtName,
            'adcode' => $adcode,
            'city_id' => $cityId,
            'city_info' => $cityInfo,
            'formatted_address' => $result['result']['formatted_addresses']['recommend'] ?? '',
            'location' => [
                'lat' => $lat,
                'lng' => $lng
            ]
        ];

        // 缓存结果（缓存1小时）
        Cache::store('redis')->set($cacheKey, $data, 3600);
        return [
            'success' => true,
            'msg' => '获取成功',
            'data' => $data
        ];
    }
}