var lastPanoId = null;         // 最後にいた場所のPanoID
var nowLatLng;
var map;
var streetViewClient;
var streetPanorama;

var enemyList = [];
var enemyMarker;

// GoogleMapsの初期化
function initMap(lat, lng){
    map = new GMap2(document.getElementById("map"));
    map.disableDragging();
    var ctrlObj = new GMapTypeControl();
    var pos = new GControlPosition(G_ANCHOR_BOTTOM_RIGHT, new GSize(5, 15));
    map.addControl(ctrlObj, pos);
    map.setCenter(new GLatLng(lat, lng), 18);
    initMarker();
    initPanorama(lat, lng);
}

var zakoIcon;
function initMarker(){
    zakoIcon = new GIcon();
    zakoIcon.image = "./zako_front.gif";
    zakoIcon.iconSize = new GSize(30, 57);
    zakoIcon.iconAnchor = new GPoint(15, 57);
}

function initPanorama(lat, lng){
    streetViewClient = new GStreetviewClient;
    streetPanorama = new GStreetviewPanorama(document.getElementById("pano"));
    nowLatLng = new GLatLng(lat, lng);
    streetViewClient.getNearestPanoramaLatLng(nowLatLng, function(latlng){
        if(latlng == null){
            document.getElementById("pano").style.display = "none";
            return;
        }
        nowLatLng = latlng;
        streetPanorama.setLocationAndPOV(nowLatLng, {yaw: 180, pitch: 0, zoom: -1});

        GEvent.addListener(streetPanorama, 
                           "yawchanged", 
                           function(yaw){
                               changeYaw(yaw);
                           });

        GEvent.addListener(streetPanorama, 
                           "initialized", 
                           function(location){
                               panoramaInitialized(location);
                           });
    });

    // キャラクタを配置
    enemyOptions = [ { lat:35.661821, lng:139.666685},
		     { lat:35.662404, lng:139.665810},
		     { lat:35.66215,  lng:139.665270}		    
                      ];
    for(i = 0; i < enemyOptions.length; i++){
        var enemy = new Object;
        enemy.lat = enemyOptions[i]["lat"];
        enemy.lng = enemyOptions[i]["lng"];
        enemy.marker = new GMarker(new GLatLng(enemy.lat, enemy.lng),{draggable:false, icon:zakoIcon});
        map.addOverlay(enemy.marker);
	enemy.moveInterval = setInterval("toNextPanorama("+i+")", 2000);
        enemyList[i] = enemy;
    }
}

// 次の位置へ移動
function toNextPanorama(enemy_num){
    var enemy = enemyList[enemy_num];
    clearInterval(enemy.moveInterval);

    enemy.pt = map.fromLatLngToContainerPixel(new GLatLng(enemy.lat, enemy.lng));
/*
    if(enemy.pt.x > 210 && enemy.pt.x < 230 && enemy.pt.y > 192 && enemy.pt.y < 270){
        //alert("hit");
    }
*/

    // 現在の表示位置の緯度経度を取得
    streetViewClient.getNearestPanorama(new GLatLng(enemy.lat, enemy.lng), function(streetData){
        var neighbourCount = streetData.links.length; // 隣接するパノラマの数
        var nextPanoId; // 次に向かうパノラマのID
        if(neighbourCount == 1){
            // 隣接するパノラマが１つだった場合はそこへ移動
            enemy.nextYaw = streetData.links[0].yaw;
            nextPanoId = streetData.links[0].panoId;
        }else{
             while(1){
                 i = Math.floor( Math.random() * neighbourCount );
                 if(enemy.lastPanoId != streetData.links[i].panoId){
                 nextPanoId = streetData.links[i].panoId;
                 enemy.nextYaw = streetData.links[i].yaw;
                 break;
            }
        }
    }
    enemy.lastPanoId = streetData.location.panoId;     // 今いた場所を覚えておく
    streetViewClient.getPanoramaById( nextPanoId,
	                              function(nextStreetData){

		                                               enemy.nowLatLng = nextStreetData.location.latlng;
		                                               var pov = streetPanorama.getPOV();
		                                               nowYaw = pov.yaw;
		                                               if(nowYaw> 360) nowYaw -= 360;
		                                               if(Math.abs(nowYaw - enemy.nextYaw)> 180){
	                                                           if(nowYaw> enemy.nextYaw) enemy.nextYaw += 360;           
		                                               }

                                                               map.removeOverlay(enemy.marker);
                                                               zakoIcon.image = getIconFromYaw(enemy.nextYaw);
							       enemy.marker = new GMarker(new GLatLng(enemy.nowLatLng.lat(), enemy.nowLatLng.lng()),{draggable:false, icon:zakoIcon});
                                                               map.addOverlay(enemy.marker);
							       enemy.lat = enemy.nowLatLng.lat();
							       enemy.lng = enemy.nowLatLng.lng();
							       enemy.pt = map.fromLatLngToContainerPixel(enemy.nowLatLng);

/*
							       if(enemy.pt.x > 210 && enemy.pt.x < 230 && enemy.pt.y > 192 && enemy.pt.y < 270){
								   //alert("hit");
							       }
*/
                                                               enemy.moveInterval = setInterval("toNextPanorama("+enemy_num+")", 2000); 
                                                               enemyList[enemy_num] = enemy;
                                      }
	                             );

     });
}

function getIconFromYaw(yaw){
    gifFile = "./zako_f.gif";
    if( yaw > 360 ) yaw -= 360;
    if( yaw >= 315 || yaw < 45  ) gifFile = "./zako_back.gif";
    else if( yaw >= 45 && yaw <  135 ) gifFile = "./zako_right.gif";
    else if( yaw >= 135 && yaw <  225 ) gifFile = "./zako_front.gif";
    else if( yaw >= 225 || yaw < 315 ) gifFile = "./zako_left.gif";
    return gifFile;
}

function changeYaw(yaw){
    var gifFile;
    if( yaw > 360 ) yaw -= 360;
    if( yaw >= 315 || yaw < 45  ) gifFile = "ue.gif";
    else if( yaw >= 45 && yaw <  135 ) gifFile = "migi.gif";
    else if( yaw >= 135 && yaw <  225 ) gifFile = "shita.gif";
    else if( yaw >= 225 || yaw < 315 ) gifFile = "hidari.gif";
    document.getElementById("girl").innerHTML = '<img src="'+ gifFile +'" alt="gial"/>';
}

function panoramaInitialized(location){
    map.panTo(location.latlng);
}