// #region Initialization
console.log(
	"\nBegin initialization ##################################################"
);

import angular from "angular";
angular != undefined
	? console.log("\tLoaded AngularJs.")
	: console.error("\tFailed to load AngularJs.");

import L, { PopupEvent, Popup } from "leaflet";
L != undefined
	? console.log("\tLoaded Leaflet.")
	: console.error("\tFailed to load Leaflet.");

import UTMLatLng from "utm-latlng";
UTMLatLng != undefined
	? console.log("\tLoaded utm-latlng.")
	: console.error("\tFailed to load utm-latlng.");

const isMobile: boolean = /Android/i.test(navigator.userAgent); // Check for mobile browser
console.log(
	`\tDetected ${
		isMobile ? "mobile browser." : "desktop browser, disabling AR features."
	}`
);

// import AR from "scripts/architect"
declare var AR: any; // Is loaded in html from scripts/architect.js

// AngularJS
const ngApp = angular.module("main", []);
console.log("\tInitialized AngularJs.");

console.log(
	"Initialization finished ###############################################"
);
// #endregion

// #region Helpers

module Calc {
	// Converts radians to degrees
	export function RadToDeg(rad: number): number {
		return rad * (180 / Math.PI);
	}

	// Converts degrees to radians
	export function DegToRad(deg: number): number {
		return (deg * Math.PI) / 180;
	}

	// Rotates a point around 0,0 by an angle in radians
	export function RotatePoint(
		point: { x: number; y: number },
		angle: number
	): { x: number; y: number } {
		return {
			x: point.x * Math.cos(angle) - point.y * Math.sin(angle),
			y: point.x * Math.sin(angle) + point.y * Math.cos(angle)
		};
	}

	// UTM Coordinates
	class UTM {
		Easting: number;
		Northing: number;
		ZoneNumber: number;
		ZoneLetter: string;
		constructor(e: number, n: number, zn: number, zl: string) {
			this.Easting = e;
			this.Northing = n;
			this.ZoneNumber = zn;
			this.ZoneLetter = zl;
		}
	}

	const _precision: number = 7; // Precision for LatLon to UTM conversion
	const _utm = new UTMLatLng("WGS 84"); // Create UTM/LatLng converter for WGS84 projection

	// Wrapper for LatLon to UTM conversion
	export function LatLonToUtm(lat: number, lon: number) {
		return _utm.convertLatLngToUtm(lat, lon, _precision);
	}

	// Wrapper for UTM to LatLon conversion
	export function UtmToLatLon(utm: UTM): { lat: number; lon: number } {
		let temp = _utm.convertUtmToLatLng(
			utm.Easting,
			utm.Northing,
			utm.ZoneNumber,
			utm.ZoneLetter
		);
		return { lat: temp.lat, lon: temp.lng };
	}
}

// Leaflet marker with additional info to represent a mounting point
class MountingPoint extends L.Marker {
	SupportedAssets: number[] = [];
	ID: number = -1;
}

// Represents all levels with the same designation,
// Stores the mounting points of those levels
class Layer {
	Name: string;
	Ids: number[];
	Selected: boolean;
	LLayer: L.LayerGroup;

	constructor(name) {
		this.Name = name;
		this.Ids = [];
		this.Selected = true;
		this.LLayer = L.layerGroup(undefined);
	}
}

// Returns true if str is undefined, empty or null
function IsStringEmpty(str: string): boolean {
	return str == undefined || str == "" || str == null;
}

// jQuery like shortcut to get html elements
function $(query: string): HTMLElement | null {
	return document.querySelector(query);
}

// Retrieves the angular $scope from outside a controller
function GetScope(): any {
	return angular.element($("body") as Element).scope() as any;
}

function Status(str: string): void {
	GetScope().status = str;
	console.log(str);
	($("#progressBar") as HTMLProgressElement).value++;
}

// #endregion

// Main AngularJs controller
ngApp.controller("ctrl", $scope => {
	let data: any = {}; // Will hold the websocket response
	let t0: number | null = null; // Measures the time it takes to load and parse
	$scope.disableInput = false; // True when loadData kicks in, disables the inputs
	$scope.connected = false; // True when websocket response was received
	$scope.status = undefined; // String that will be shown while connecting

	// Writes the websocket response to data when the load button is clicked
	/** @function */ $scope.loadDataFromWS = (ip: string): void => {
		$scope.disableInput = true;
		console.log(
			"Begin loading data ####################################################"
		);

		t0 = performance.now(); // Get start time

		// Default value for ip if nothing was entered
		ip = IsStringEmpty(ip) ? "ws://192.168.133.140:2080" : ip;

		// Catch invalid ips
		try {
			var ws = new WebSocket(ip); // Connect to the websocket
		} catch (e) {
			alert("Invalid IP");
			return;
		}

		Status(`\tConnecting to ${ip}...`);

		// Connect to the web socket
		ws.onopen = () => {
			console.log("\tConnected.");
			ws.send(
				JSON.stringify({
					type: "getEssentials",
					uuid: "UUID"
				})
			);
		};

		// Handles the response of the websocket
		ws.onmessage = response => {
			console.log(
				`\tFetched ${Math.round(
					new TextEncoder().encode(response.data).length / 1000
				)}kb.`
			);
			data = JSON.parse(response.data).data; // Parse websocket response to data
			window.localStorage.setItem("data", escape(response.data));
			$scope.$broadcast("dataLoaded"); // Call response event to kick in the map and selection GUI
		};

		// Handle bad websocket responses
		ws.onclose = event => {
			if (event.code > 1000) {
				t0 = null;
				$scope.status = "";
				alert(`Error when getting websocket response.\n${event.code}`);
				$scope.disableInput = false;
			}
		};
	};

	/** @function */ $scope.loadDataFromCache = () => {
		$scope.disableInput = true;
		console.log(
			"Begin loading data ####################################################"
		);
		t0 = performance.now();
		Status("Loading data from cache...");

		try {
			if (window.localStorage.getItem("data") == null) throw new Error();
			let _data = unescape(window.localStorage.getItem("data") as string);
			data = JSON.parse(_data).data;
			console.log(
				`\tLoaded ${Math.round(
					new TextEncoder().encode(_data).length / 1000
				)}kb from cache.`
			);
			$scope.$broadcast("dataLoaded");
		} catch {
			$scope.status = "";
			$scope.disableInput = false;
			t0 = null;
			console.log("\tCould not load data from cache.");
			alert("No data cached.");
		}
	};

	// Handles websocket response event
	$scope.$on("dataLoaded", () => {
		let _data: any = data;

		$scope.connected = true; // Switches the connection menu for the mounting point selection
		$scope.loading = true; // Disables the GUI while doing stuff

		// #region MAP

		console.log("\tCreating map.");

		// Create the map, set view and image
		let map = new L.Map("map").setView(
			new L.LatLng(53.0528064472226, 8.89412999153137),
			8
		);
		let imageBounds = new L.LatLngBounds([
			[53.0528064472226, 8.89412999153137],
			[53.056520842139, 8.90030980110168]
		]);
		let mapImage = L.imageOverlay("img/RDE2.jpg", imageBounds);
		map.addLayer(mapImage);
		map.fitBounds(imageBounds);

		// #endregion
		// #region BUILDINGS

		// Get buildings
		let buildings: any[] = _data.objects;

		Status(`\tParsing ${buildings.length} buildings...`);

		// Create GeoJson from buidling footprints
		let footprintPolygons: GeoJSON.FeatureCollection = {
			type: "FeatureCollection",
			features: []
		};

		for (let currentBuilding of buildings) {
			// Check if current builing has footprint data, if not: skip
			if (!(currentBuilding.path[0] == undefined)) {
				// Holds footprint coordinates of the current building
				let footprintCoords: number[][][] = [[]];

				// Parse footprint coordinates from current building
				for (let pos of currentBuilding.path) {
					footprintCoords[0].push([
						// Convert from radians to degrees and add to the array
						Calc.RadToDeg(pos.lon),
						Calc.RadToDeg(pos.lat)
					]);
				}

				// Last point has to be the same as the first point so we add it again
				footprintCoords[0].push([
					Calc.RadToDeg(currentBuilding.path[0].lon),
					Calc.RadToDeg(currentBuilding.path[0].lat)
				]);

				// Create new GeoJson Feature with building footprint
				let currentFootprint: GeoJSON.Feature = {
					type: "Feature",
					properties: {
						name: currentBuilding.designation
					},
					geometry: {
						type: "Polygon",
						coordinates: footprintCoords
					}
				};

				// Add GeoJson feature to feature collection
				footprintPolygons.features.push(currentFootprint);
			}
		}

		// Draw building footprints to map, add name popups
		let footprintGeoJson = L.geoJSON(footprintPolygons, {
			onEachFeature: (feature, layer) => {
				layer.bindPopup(`<h2>${feature.properties.name}</h2>`);
			}
		}).addTo(map);

		// #endregion
		// #region LEVELS

		let levels: any[] = _data.levels; // Levels are the actual floors in the building
		let layers: Layer[] = []; // Layers are their representation on the map

		Status(`\tParsing ${levels.length} levels...`);

		for (let level of levels) {
			// Create a layer for each level

			let add: boolean = true;
			for (let layer of layers) {
				// Levels with duplicate names will be on the same layer
				if (level.designation === layer.Name) {
					add = false;
					layer.Ids.push(level.id);
					break;
				}
			}

			if (add) {
				// Create new Layer if level is not a duplicate
				let newLayer: Layer = new Layer(level.designation);
				newLayer.Ids.push(level.id);
				layers.push(newLayer);
			}
		}

		let outdoorLayer: Layer = new Layer("outdoor"); // Create a layer for mounting points outside of buildings
		outdoorLayer.Ids = [-1];

		let footprintLayer: Layer = new Layer("buildings"); // Create a layer for the building footprint
		footprintLayer.LLayer = footprintGeoJson;

		layers.push(outdoorLayer); // Add outdoor and footprint layers
		layers.push(footprintLayer);

		$scope.layers = layers; // Add layers to the checkbox menu

		// #endregion
		// #region MOUNTING POINTS

		// Get mounting points
		let mountingPoints: any[] = _data.mountingPoints;

		Status(`\tParsing ${mountingPoints.length} mounting points...`);

		for (let m of mountingPoints) {
			for (let b of buildings) {
				if (b.id == m.objectId) {
					// Current mounting point is in current buidling?

					b.utmRefPoint = Calc.LatLonToUtm(
						Calc.RadToDeg(b.refPoint.lat),
						Calc.RadToDeg(b.refPoint.lon)
					); // Converts refPoint of the building to UTM

					m.fixedPosition = Calc.RotatePoint(
						{ x: m.position3d.x, y: m.position3d.y },
						Calc.DegToRad(b.rotationDegree)
					); // Rotates coords of the mounting point by rotationDegree of the building

					m.absoluteUtm = b.utmRefPoint;
					m.absoluteUtm.Easting += m.fixedPosition.x;
					m.absoluteUtm.Northing += m.fixedPosition.y;
					m.absoluteLatLon = Calc.UtmToLatLon(m.absoluteUtm);
					// Add refPoint to the relative position and convert back to lat/lng

					const arButtonHtml = isMobile
						? `<button
								onclick="window.Functions.DisplayInAr(${m.id})"
								id="arButton"
						    >
								Show in AR
							</button>`
						: "<i>AR not supported on desktop.</i>";

					for (let l of layers) {
						for (let i of l.Ids) {
							if (i == m.levelId) {
								// Current mouting point is on current level?

								let marker = new MountingPoint(
									// Create a marker for the mounting point
									new L.LatLng(
										m.absoluteLatLon.lat,
										m.absoluteLatLon.lon
									),
									{
										icon: L.icon({
											iconUrl: "img/marker.png",
											iconSize: [30, 30]
										})
									}
								)
									.bindPopup(
										// Create a popup with info about the mounting point
										`<h2>
										${IsStringEmpty(m.tag) ? m.designation : m.tag}
										</h2>
										<table>
											<tr>
												<td>ID</td>
												<td>${m.id}</td>
											</tr>
											<tr>
												<td>Object ID</td>
												<td>${m.objectId}</td>
											</tr>
											<tr>
												<td>Supported Asset Type IDs</td>
												<td>${m.supportedAssetTypeIds}</td>
											</tr>
										</table>
										<br />
										${arButtonHtml}
										`
									)
									.addTo(map); // Add it to the map

								marker.SupportedAssets = // Add info about supported asset types
									m.supportedAssetTypeIds;
								marker.ID = m.id; // Add mounting point id

								l.LLayer.addLayer(marker); // Add marker to corresponding layer
							}
						}
					}
				}
			}
		}

		$scope.mountingPoints = mountingPoints;

		// #endregion
		// #region ASSETS

		// Get asset types
		let assets: any[] = _data.assetTypes;

		Status(`\tParsing ${assets.length} assets...`);

		// Add asset types to the dropdown menu
		$scope.assets = {
			availableAssets: assets,
			selectedAsset: assets[0]
		};

		// #endregion
		// #region ANGULAR FUNCTIONS

		// Called by either the layer or asset selection
		/** @function */ $scope.SelectionChanged = () => {
			let points: number = 0;
			for (let layer of layers) {
				if (layer.Selected) {
					map.addLayer(layer.LLayer); // Add selected layers

					// Hacky type conversion to get the supported asset types from each mounting point on a layer
					// If it's stupid but it works it's not stupid
					for (let m of (layer.LLayer.getLayers() as unknown[]) as MountingPoint[]) {
						try {
							for (let a of m.SupportedAssets) {
								if (a == $scope.assets.selectedAsset.id) {
									m.addTo(map); // Add markers for selected asset type
									++points;
								} else {
									m.removeFrom(map); // Remove all other markers
								}
							}
						} catch {
							/** Sometimes theres an error here...
							 *  Doesn't seem to interfere with anything though and
							 *  I don't want to see it in the console
							 */
						}
					}
				} else map.removeLayer(layer.LLayer); // Remove unselected layers
			}
			console.log(
				`Selected ${points} mounting point${points == 1 ? "" : "s"}.`
			);
		};

		// Filter for selected mounting point table and count
		/** @function */ $scope.MountingPointFilter = () => {
			return mp => {
				let correctAssetType: boolean = false;

				for (let i of mp.supportedAssetTypeIds) {
					if (i == $scope.assets.selectedAsset.id) {
						correctAssetType = true;
						break;
					}
				} // Current mounting point supports selected asset type

				let correctLayer: boolean = false;

				for (let layer of layers) {
					for (let i of layer.Ids) {
						if (layer.Selected && i == mp.levelId) {
							correctLayer = true;
							break;
						}
					}
				} // Current mounting point is on a selected layer

				let foundBySearch: boolean = IsStringEmpty($scope.mpSearch)
					? true // Automatically true if search input empty
					: (IsStringEmpty(mp.tag) ? mp.designation : mp.tag).indexOf(
							$scope.mpSearch
					  ) >= 0 || mp.id.toString().indexOf($scope.mpSearch) >= 0;
				// true if tag, designation or id contain search input

				return correctAssetType && correctLayer && foundBySearch;
			};
		};

		// Function for the Show button
		/** @function */ $scope.ShowMp = mp => {
			for (let l of layers) {
				// Not this again...
				for (let m of (l.LLayer.getLayers() as unknown[]) as MountingPoint[]) {
					if (m.ID == mp.id) {
						// Find clicked mounting point
						m.openPopup(); // Open corresponding popup
						map.panTo(m.getLatLng()); // Center map on the popup
						break;
					}
				}
			}
		};

		// #endregion

		// Get final time and format it
		let time: string =
			t0 != null
				? `Finished loading data in ${performance.now() -
						t0}ms ########################################`
				: `Finished loading data #################################################`;
		console.log(time);

		$scope.SelectionChanged(); // Make initial map state fit the initial menu state
		$scope.loading = false; // Done loading
		$scope.$apply();
	});
});

// #region WIKITUDE FUNCTIONS

var currentPOI: any = undefined; // Holds current wikitude ar marker

// Shows an augmented reality marker vor the selected mounting point
function _displayInAr(id: number): void {
	let $scope = GetScope(); // Retrieve angular scope
	let mountingPoint: any;

	for (let mp of $scope.mountingPoints) {
		if (mp.id == id) {
			mountingPoint = mp;
			break;
		}
	} // Get correct mounting point

	let name = IsStringEmpty(mountingPoint.tag)
		? mountingPoint.designation
		: mountingPoint.tag;

	$scope.arMountingPoint = name;
	// Display mounting point tag/designation

	currentPOI = new AR.GeoObject(
		[
			new AR.GeoLocation(
				mountingPoint.absoluteLatLon.lat,
				mountingPoint.absoluteLatLon.lon
			)
		],
		{
			drawables: {
				cam: [
					new AR.ImageDrawable(
						new AR.ImageResource("img/armarker.png"),
						2.5,
						{ zOrder: 0, opacity: 1 }
					),
					new AR.Label(name, 1, {
						zOrder: 1,
						style: { textColor: "#ffffff" }
					})
				],
				indicator: new AR.ImageDrawable(
					new AR.ImageResource("img/arindicator.png"),
					0.1,
					{
						enabled: true,
						verticalAnchor: AR.CONST.VERTICAL_ANCHOR.TOP
					}
				)
			}
		}
	); // Create AR marker

	$scope.arMode = true; // Hide map and menu

	$scope.$apply();

	console.log("Switched to AR mode.");
}

// Goes back to the map view
function _backFromAr(): void {
	let $scope = GetScope(); // Retrieve angular scope

	$scope.arMountingPoint = ""; // Clear name display
	$scope.arMode = false; // Show map and menu again

	currentPOI.destroy();
	currentPOI = undefined;

	$scope.$apply();

	console.log("Switched to map mode.");
}

// #region TS -> JS
/**
 * Hacky way to make typescript functions accessible from the html page
 * like in regular javascript
 */

// Add "Functions"-object to window
declare global {
	interface Window {
		Functions: any;
	}
}

// Attach functions
window.Functions = window.Functions || {
	DisplayInAr: _displayInAr,
	BackFromAr: _backFromAr
};
// #endregion

// #endregion