// map-service.js - 腾讯地图 JS API（无 CORS）
class MapService {
    constructor() {
        this._key = window.TENCENT_MAP_KEY || window.ENV?.TENCENT_MAP_KEY || window.ENV?.AMAP_KEY;
        if (!this._key) {
            console.warn('⚠️ MapService: 未找到 Key');
        }
        this._ready = false;
        this._init();
    }

    _init() {
        if (typeof TMap !== 'undefined' && TMap.service) {
            this._ready = true;
            console.log('✅ 腾讯地图服务已初始化');
            return;
        }
        window.addEventListener('tencentMapLoaded', () => {
            if (typeof TMap !== 'undefined' && TMap.service) {
                this._ready = true;
                console.log('✅ 腾讯地图服务已初始化 (事件)');
            }
        });
        setTimeout(() => {
            if (!this._ready && typeof TMap !== 'undefined' && TMap.service) {
                this._ready = true;
                console.log('✅ 腾讯地图服务已初始化 (延迟检测)');
            }
        }, 2000);
    }

    reverseGeocode(lng, lat) {
        return new Promise((resolve, reject) => {
            if (!this._ready || typeof TMap === 'undefined' || !TMap.service) {
                reject(new Error('腾讯地图服务未初始化'));
                return;
            }
            // 注意：腾讯地图经纬度顺序是 lat, lng
            const latLng = new TMap.LatLng(lat, lng);
            const geocoder = new TMap.service.Geocoder();

            geocoder.reverseGeocoder({ location: latLng })
                .then((result) => {
                    if (result.status === 0) {
                        const addr = result.result;
                        resolve({
                            address: addr.address,
                            province: addr.address_component.province,
                            city: addr.address_component.city,
                            district: addr.address_component.district,
                            adcode: addr.address_component.adcode,
                            _raw: addr
                        });
                    } else {
                        reject(new Error(`逆地理失败: ${result.message}`));
                    }
                })
                .catch((error) => {
                    reject(new Error(`请求失败: ${error.message || error}`));
                });
        });
    }
}

window.MapService = MapService;
if (document.readyState === 'complete' || document.readyState === 'interactive') {
    if (!window.mapService) {
        window.mapService = new MapService();
    }
}