<?php
namespace RiderApi\Controller;

/**
 * 骑手端地图控制器
 */
class MapController extends BaseController {
    
    /**
     * 获取附近地点
     */
    public function getNearbyPlaces() {
        $lat = floatval($this->getRequestParam('lat', 0));
        $lng = floatval($this->getRequestParam('lng', 0));
        $radius = intval($this->getRequestParam('radius', 1000)); // 默认1000米
        $type = $this->getRequestParam('type', ''); // 地点类型
        
        if (empty($lat) || empty($lng)) {
            $this->ajaxReturn(array('code' => 0, 'msg' => '位置信息不能为空'));
        }
        
        // 这里可以调用第三方地图API（如高德、百度等）
        // 暂时返回模拟数据
        $places = array(
            array(
                'id' => 1,
                'name' => '附近餐厅',
                'address' => '示例地址1',
                'lat' => $lat + 0.001,
                'lng' => $lng + 0.001,
                'distance' => 100,
                'type' => 'restaurant'
            ),
            array(
                'id' => 2,
                'name' => '附近商店',
                'address' => '示例地址2',
                'lat' => $lat - 0.001,
                'lng' => $lng - 0.001,
                'distance' => 200,
                'type' => 'shop'
            )
        );
        
        $this->ajaxReturn(array(
            'code' => 1,
            'msg' => '获取成功',
            'data' => $places
        ));
    }
    
    /**
     * 搜索地点
     */
    public function searchPlaces() {
        $keyword = trim($this->getRequestParam('keyword', ''));
        $lat = floatval($this->getRequestParam('lat', 0));
        $lng = floatval($this->getRequestParam('lng', 0));
        $city = trim($this->getRequestParam('city', ''));
        
        if (empty($keyword)) {
            $this->ajaxReturn(array('code' => 0, 'msg' => '搜索关键词不能为空'));
        }
        
        // 这里可以调用第三方地图API进行地点搜索
        // 暂时返回模拟数据
        $places = array(
            array(
                'id' => 1,
                'name' => $keyword . '相关地点1',
                'address' => '搜索结果地址1',
                'lat' => 39.908823,
                'lng' => 116.397470,
                'distance' => 500
            ),
            array(
                'id' => 2,
                'name' => $keyword . '相关地点2',
                'address' => '搜索结果地址2',
                'lat' => 39.909823,
                'lng' => 116.398470,
                'distance' => 800
            )
        );
        
        $this->ajaxReturn(array(
            'code' => 1,
            'msg' => '搜索成功',
            'data' => $places
        ));
    }
    
    /**
     * 路线规划
     */
    public function planRoute() {
        $riderId = $this->riderId;
        $rider = $this->riderInfo;
        
        // 获取请求参数
        $startLat = floatval($this->getRequestParam('start_lat', 0));
        $startLng = floatval($this->getRequestParam('start_lng', 0));
        $endLat = floatval($this->getRequestParam('end_lat', 0));
        $endLng = floatval($this->getRequestParam('end_lng', 0));
        $startAddress = trim($this->getRequestParam('start_address', ''));
        $endAddress = trim($this->getRequestParam('end_address', ''));
        $waypoints = $this->getRequestParam('waypoints', array()); // 途经点
        $strategy = $this->getRequestParam('strategy', 'fastest'); // 路线策略：fastest(最快), shortest(最短), avoid_traffic(避开拥堵)
        
        // 参数验证
        if (empty($startLat) || empty($startLng) || empty($endLat) || empty($endLng)) {
            $this->ajaxReturn(array('code' => 0, 'msg' => '起点和终点坐标不能为空'));
        }
        
        // 验证坐标范围
        if ($startLat < -90 || $startLat > 90 || $endLat < -90 || $endLat > 90) {
            $this->ajaxReturn(array('code' => 0, 'msg' => '纬度范围错误'));
        }
        
        if ($startLng < -180 || $startLng > 180 || $endLng < -180 || $endLng > 180) {
            $this->ajaxReturn(array('code' => 0, 'msg' => '经度范围错误'));
        }
        
        try {
            // 调用路线规划服务
            $routeResult = $this->calculateRoute($startLat, $startLng, $endLat, $endLng, $waypoints, $strategy);
            
            if (!$routeResult) {
                $this->ajaxReturn(array('code' => 0, 'msg' => '路线规划失败'));
            }
            
            // 保存路线规划记录
            $this->saveRouteRecord($riderId, $startLat, $startLng, $endLat, $endLng, $startAddress, $endAddress, $routeResult);
            
            $this->ajaxReturn(array(
                'code' => 1,
                'msg' => '路线规划成功',
                'data' => $routeResult
            ));
            
        } catch (\Exception $e) {
            $this->ajaxReturn(array(
                'code' => 0,
                'msg' => '路线规划异常：' . $e->getMessage()
            ));
        }
    }
    
    /**
     * 计算路线
     */
    private function calculateRoute($startLat, $startLng, $endLat, $endLng, $waypoints = array(), $strategy = 'fastest') {
        // 这里应该调用第三方地图API（如高德、百度等）进行实际的路线规划
        // 目前返回模拟数据
        
        // 计算直线距离（简化处理）
        $distance = $this->calculateDistance($startLat, $startLng, $endLat, $endLng);
        
        // 模拟路线数据
        $route = array(
            'distance' => round($distance, 2), // 距离（公里）
            'duration' => round($distance / 30 * 60, 0), // 预估时间（分钟，按30km/h计算）
            'polyline' => $this->generatePolyline($startLat, $startLng, $endLat, $endLng), // 路线坐标点
            'steps' => $this->generateRouteSteps($startLat, $startLng, $endLat, $endLng), // 导航步骤
            'strategy' => $strategy,
            'traffic_info' => array(
                'status' => 'smooth', // 路况：smooth(畅通), slow(缓慢), congested(拥堵)
                'delay_time' => 0 // 延误时间（分钟）
            )
        );
        
        return $route;
    }
    
    /**
     * 计算两点间距离（公里）
     */
    private function calculateDistance($lat1, $lng1, $lat2, $lng2) {
        $earthRadius = 6371; // 地球半径（公里）
        
        $lat1Rad = deg2rad($lat1);
        $lng1Rad = deg2rad($lng1);
        $lat2Rad = deg2rad($lat2);
        $lng2Rad = deg2rad($lng2);
        
        $deltaLat = $lat2Rad - $lat1Rad;
        $deltaLng = $lng2Rad - $lng1Rad;
        
        $a = sin($deltaLat / 2) * sin($deltaLat / 2) + 
             cos($lat1Rad) * cos($lat2Rad) * 
             sin($deltaLng / 2) * sin($deltaLng / 2);
        $c = 2 * atan2(sqrt($a), sqrt(1 - $a));
        
        return $earthRadius * $c;
    }
    
    /**
     * 生成路线坐标点
     */
    private function generatePolyline($startLat, $startLng, $endLat, $endLng) {
        // 简化处理，生成几个中间点
        $points = array();
        $steps = 5;
        
        for ($i = 0; $i <= $steps; $i++) {
            $ratio = $i / $steps;
            $lat = $startLat + ($endLat - $startLat) * $ratio;
            $lng = $startLng + ($endLng - $startLng) * $ratio;
            $points[] = array('lat' => $lat, 'lng' => $lng);
        }
        
        return $points;
    }
    
    /**
     * 生成导航步骤
     */
    private function generateRouteSteps($startLat, $startLng, $endLat, $endLng) {
        return array(
            array(
                'instruction' => '从起点出发',
                'distance' => 0,
                'duration' => 0,
                'lat' => $startLat,
                'lng' => $startLng
            ),
            array(
                'instruction' => '直行',
                'distance' => $this->calculateDistance($startLat, $startLng, $endLat, $endLng) * 1000,
                'duration' => round($this->calculateDistance($startLat, $startLng, $endLat, $endLng) / 30 * 60, 0),
                'lat' => $endLat,
                'lng' => $endLng
            ),
            array(
                'instruction' => '到达目的地',
                'distance' => 0,
                'duration' => 0,
                'lat' => $endLat,
                'lng' => $endLng
            )
        );
    }
    
    /**
     * 保存路线规划记录
     */
    private function saveRouteRecord($riderId, $startLat, $startLng, $endLat, $endLng, $startAddress, $endAddress, $routeResult) {
        $routeModel = M('rider_route_record');
        
        $data = array(
            'rider_id' => $riderId,
            'start_lat' => $startLat,
            'start_lng' => $startLng,
            'end_lat' => $endLat,
            'end_lng' => $endLng,
            'start_address' => $startAddress,
            'end_address' => $endAddress,
            'distance' => $routeResult['distance'],
            'duration' => $routeResult['duration'],
            'strategy' => $routeResult['strategy'],
            'route_data' => json_encode($routeResult),
            'create_time' => date('Y-m-d H:i:s')
        );
        
        $routeModel->add($data);
    }
    
    /**
     * 获取缓存信息
     */
    public function getCacheInfo() {
        $riderId = $this->riderId;
        
        // 获取路线缓存数量
        $routeModel = M('rider_route_record');
        $routeCount = $routeModel->where(array('rider_id' => $riderId))->count();
        
        $cacheInfo = array(
            'route_cache_count' => $routeCount,
            'cache_size' => round($routeCount * 0.5, 2) . 'MB', // 估算缓存大小
            'last_clear_time' => '2024-01-01 00:00:00' // 最后清理时间
        );
        
        $this->ajaxReturn(array(
            'code' => 1,
            'msg' => '获取成功',
            'data' => $cacheInfo
        ));
    }
    
    /**
     * 清理缓存
     */
    public function clearCache() {
        $riderId = $this->riderId;
        
        try {
            // 清理路线记录缓存（保留最近30天的记录）
            $routeModel = M('rider_route_record');
            $thirtyDaysAgo = date('Y-m-d H:i:s', strtotime('-30 days'));
            
            $deletedCount = $routeModel->where(array(
                'rider_id' => $riderId,
                'create_time' => array('lt', $thirtyDaysAgo)
            ))->delete();
            
            $this->ajaxReturn(array(
                'code' => 1,
                'msg' => '缓存清理成功，清理了' . $deletedCount . '条记录'
            ));
            
        } catch (\Exception $e) {
            $this->ajaxReturn(array(
                'code' => 0,
                'msg' => '缓存清理失败：' . $e->getMessage()
            ));
        }
    }
}