import Vue from 'vue'
import Vuex from 'vuex'

Vue.use(Vuex)

export default new Vuex.Store({
	state: {
		socket: null,
		autoUpdate: false,
		coordinates: [0, 0],
		playersLayer: true,
		buildingsLayer: true,
		poiLayer: true,
		travelnetLayer: true,
		otherLayer: true,
		players: []
	},
	
	mutations: {
		updateCoordinates(state, value) {
			state.coordinates = value;
		},
		setAutoUpdate(state, value) {
			state.autoUpdate = value
		},
		updatePlayersLayer(state, value) {
			state.playersLayer = value;
		},
		updateBuildingsLayer(state, value) {
			state.buildingsLayer = value;
		},
		updatePoiLayer(state, value) {
			state.poiLayer = value;
		},
		updateTravelnetLayer(state, value) {
			state.travelnetLayer = value;
		},
		updateOtherLayer(state, value) {
			state.otherLayer = value;
		},
		setPlayers(state, value) {
			state.players = value;
		},
		setPlayerState(state, value) {
			const p = state.players.find(p => p.name === value.name)
			p.online = value.state;
		}
	},

	actions: {
		stopAutoUpdate: function({ state }) {
			if (this.socket) {
				var s = state.socket;
				state.socket = null;
				s.close();
			}
		},

		manualUpdate: function({commit}) {
        var tiles = document.getElementsByTagName("img");
        for (var i = 0; i < tiles.length; i++) {
            var img = tiles[i];
            var cl = img.getAttribute("class");
            if (cl.indexOf("leaflet-tile-loaded") >= 0) {
                var src = img.src;
                var idx = src.lastIndexOf("#");
                if (idx >= 0) {
                    src = src.substring(0, idx);
                }
                img.src = src + "#" + Math.random();
            }
        }
				fetch("players").then(response => response.json().then((data) => {
					commit("setPlayers", data);
				}));
    },

		runAutoUpdate: function({ commit, state, dispatch}) {
			var me = this;
			// TODO: Make the URL to websocket configurable via .env
			state.socket = new WebSocket('ws://' + window.location.host + '/socket');

			state.socket.onerror = function() {
				commit('setAutoUpdate', false)
				dispatch('stopAutoUpdate');
			};

			state.socket.onclose = function() {
				commit('setAutoUpdate', false)
				state.socket = null;
			}

			state.socket.onopen = function() {
				// Sending pings every 5 secs to keep connection alive.
				var heartbeat = function() {
					if (heartbeat && me.socket) {
						me.socket.send("PING");
						setTimeout(heartbeat, 8000);
					} else {
						// Prevent sending pings to re-opened sockets.
						heartbeat = null;
					}
				};
				setTimeout(heartbeat, 8000);
			};

			state.socket.onmessage = function(evt) {
				var json = evt.data;
				if (!(typeof json === "string")) {
					return;
				}

				var msg;
				try {
					msg = JSON.parse(json);
				}
				catch (err) {
					return;
				}

				if (msg.players) {
					commit('setPlayers', msg.players);
				}

				var tilesData = msg.tiles;
				if (!tilesData) {
					return;
				}

				var invalidate = function(td) {
					var pyramid = new Array(9);
					var last = new Object();
					pyramid[8] = last;

					for (var i = 0; i < td.length; i++) {
							var xz = td[i];
							last[xz.X + "#" + xz.Z] = xz;
					}
					for (var p = 7; p >= 0; p--) {
						var prev = pyramid[p+1];
						var curr = new Object();
						pyramid[p] = curr;
						for (var k in prev) {
							if (Object.prototype.hasOwnProperty.call(prev, k)) {
								var oxz = prev[k];
								var nxz = { X: oxz.X >> 1, Z: oxz.Z >> 1 };
								curr[nxz.X + "#" + nxz.Z] = nxz;
							}
						}
					}
					return function(x, y, z) {
						if (y > 8) {
							x >>= y - 8;
							z >>= y - 8;
							y = 8;
						}
						var level = pyramid[y];
						var k = x + "#" + z;
						return Object.prototype.hasOwnProperty.call(level, k);
					};
				} (tilesData);
				var tiles = document.getElementsByTagName('img');
				var re = /\/map\/([0-9]+)\/([0-9]+)\/([0-9]+).*/;
				for (var i = 0; i < tiles.length; i++) {
					var img = tiles[i];
					var cl = img.getAttribute('class');
					if (cl.indexOf('leaflet-tile-loaded') < 0) {
						continue;
					}
					var src = img.src;
					var coord = src.match(re);
					if (coord == null) {
						continue;
					}
					var y = parseInt(coord[1]);
					var x = parseInt(coord[2]);
					var z = parseInt(coord[3]);
					if (invalidate(x, y, z)) {
						var idx = src.lastIndexOf('#');
						if (idx >= 0) {
							src = src.substring(0, idx);
						}
						img.src = src + '#' + Math.random();
					}
				}
			};
		}
	}
})