import Map from "ol/Map";
import View from "ol/View";
import Projection from "ol/proj/Projection.js";
import TileLayer from 'ol/layer/Tile'
import OSM from 'ol/source/OSM'
import * as olProj from "ol/proj";
export default class Conquer {
    private conquerContainer: HTMLDivElement;
    private map: Map;
    private currentLongitude: number;
    private currentLatitude: number;
    private rotationOffset = 0;
    private heading = 0
    private disableSetRotationOffset = false
    private conquerLogin: HTMLDivElement
    private conquerLoginGoToRegister: HTMLAnchorElement
    private conquerLoginError: HTMLParagraphElement
    private conquerLoginSuccess: HTMLParagraphElement
    private conquerRegisterGoToLogin: HTMLAnchorElement
    private conquerRegister: HTMLDivElement
    private conquerRegisterUsername: HTMLInputElement
    private conquerRegisterPassword: HTMLInputElement
    private conquerRegisterRepeatPassword: HTMLInputElement
    private conquerRegisterSubmit: HTMLButtonElement
    private conquerRegisterError: HTMLParagraphElement
    private alpha = 0;
    private beta = 0;
    private gamma = 0;
    static start() {
        const conquerContainer = document.querySelector(".conquer-container");
        if (conquerContainer !== null) {
            if (!(conquerContainer instanceof HTMLDivElement)) {
                console.error(".conquer-container is not a div.");
                return;
            }
            const conquer = new Conquer(conquerContainer);
            conquer.run();
        }
    }
    setCenterDisplaced(lat: number, lon: number) {
        const olCoordinates = this.realCoordinatesToOl(lat, lon)
        const size = this.map.getSize()
        if (size === undefined) {
            return
        }
        this.map.getView().centerOn(olCoordinates, size, [size[0]/2, size[1]-60])
    }
    static fail(error: string): never {
        alert('Error de interfaz')
        throw new Error(error)
    }
    fillConquerLogin() {
        const conquerLogin = document.querySelector('.conquer-login')
        if (conquerLogin === null || !(conquerLogin instanceof HTMLDivElement)) {
            Conquer.fail('conquerLogin is invalid')
        }
        this.conquerLogin = conquerLogin
        const conquerLoginGoToRegister = document.querySelector('.conquer-login-go-to-register')
        if (conquerLoginGoToRegister === null || !(conquerLoginGoToRegister instanceof HTMLAnchorElement)) {
            Conquer.fail('Link to go to register from login is invalid.')
        }
        this.conquerLoginGoToRegister = conquerLoginGoToRegister
        this.conquerLoginGoToRegister.addEventListener('click', () => {
            this.goToRegister()
        })
        const conquerLoginError = document.querySelector('.conquer-login-error')
        if (conquerLoginError === null || !(conquerLoginError instanceof HTMLParagraphElement)) {
            Conquer.fail('Unable to find conquer login error.')
        }
        this.conquerLoginError = conquerLoginError
        const conquerLoginSuccess = document.querySelector('.conquer-login-success')
        if (conquerLoginSuccess === null || !(conquerLoginSuccess instanceof HTMLParagraphElement)) {
            Conquer.fail('Unable to find conquer login success.')
        }
        this.conquerLoginSuccess = conquerLoginSuccess
    }
    async goToRegister(): Promise<void> {
        const isLogged = await this.isLogged();
        await this.removeLoginRegisterCombo()
        if (!isLogged) {
            this.conquerRegister.classList.remove('conquer-display-none')
        }
    }
    async goToLogin(): Promise<void> {
        const isLogged = await this.isLogged();
        await this.removeLoginRegisterCombo()
        if (!isLogged) {
            this.conquerLogin.classList.remove('conquer-display-none')
        }
    }

    async removeLoginRegisterCombo(): Promise<void> {
        this.conquerLogin.classList.add('conquer-display-none')
        this.conquerRegister.classList.add('conquer-display-none')
    }

    fillConquerRegister() {
        const conquerRegister = document.querySelector('.conquer-register')
        if (conquerRegister === null || !(conquerRegister instanceof HTMLDivElement)) {
            Conquer.fail('conquerRegister is invalid')
        }
        this.conquerRegister = conquerRegister
        const conquerRegisterGoToLogin = document.querySelector('.conquer-register-go-to-login')
        if (conquerRegisterGoToLogin === null || !(conquerRegisterGoToLogin instanceof HTMLAnchorElement)) {
            Conquer.fail('Link to go to login from register is invalid.')
        }
        this.conquerRegisterGoToLogin = conquerRegisterGoToLogin
        this.conquerRegisterGoToLogin.addEventListener('click', () => {
            this.goToLogin()
        })
        const conquerRegisterUsername = document.querySelector('.conquer-register-username')
        if (conquerRegisterUsername === null || !(conquerRegisterUsername instanceof HTMLInputElement)) {
            Conquer.fail('No username field in conquer register.')
        }
        this.conquerRegisterUsername = conquerRegisterUsername
        const conquerRegisterPassword = document.querySelector('.conquer-register-password')
        if (conquerRegisterPassword === null || !(conquerRegisterPassword instanceof HTMLInputElement)) {
            Conquer.fail('No password field in conquer register.')
        }
        this.conquerRegisterPassword = conquerRegisterPassword
        const conquerRegisterRepeatPassword = document.querySelector('.conquer-register-repeat-password')
        if (conquerRegisterRepeatPassword === null || !(conquerRegisterRepeatPassword instanceof HTMLInputElement)) {
            Conquer.fail('No repeat password field in conquer register.')
        }
        this.conquerRegisterRepeatPassword = conquerRegisterRepeatPassword
        const conquerRegisterSubmit = document.querySelector('.conquer-register-submit')
        if (conquerRegisterSubmit === null || !(conquerRegisterSubmit instanceof HTMLButtonElement)) {
            Conquer.fail('No register submit button found.')
        }
        this.conquerRegisterSubmit = conquerRegisterSubmit
        this.conquerRegisterSubmit.addEventListener('click', (event: Event) => {
            event.preventDefault()
            this.onRegisterRequest()
        })
        const conquerRegisterError = document.querySelector('.conquer-register-error')
        if (conquerRegisterError === null || !(conquerRegisterError instanceof HTMLParagraphElement)) {
            Conquer.fail('Unable to find the conquer error element.')
        }
        this.conquerRegisterError = conquerRegisterError

    }

    unsetLoginAndRegisterErrors() {
        this.conquerRegisterError.classList.add('conquer-display-none')
        this.conquerLoginError.classList.add('conquer-display-none')
    }

    async onRegisterRequest(): Promise<void> {
        const username = this.conquerRegisterUsername.value
        const password = this.conquerRegisterPassword.value
        const repeatPassword = this.conquerRegisterRepeatPassword.value
        const urlUser = new URL('/conquer/user', window.location.protocol + '//' + window.location.hostname + ':' + window.location.port)
        const response = await fetch(urlUser, {
            method: 'PUT',
            body: JSON.stringify({
                username: username,
                password: password,
                repeat_password: repeatPassword
            })
        })
        let responseJson
        try {
            responseJson = await response.json()
        } catch(e) {
            console.error(e)
            return;
        }
        if (response.status !== 200) {
            this.addNewRegisterError(responseJson.error)
            return
        }
        this.addNewLoginSuccessText(`Usuario registrado ${username}.`)
        this.goToLogin()
    }
    addNewLoginSuccessText(message: string): void {
        this.unsetLoginAndRegisterErrors()    
        this.conquerLoginSuccess.innerText = message
        this.conquerLoginSuccess.classList.remove('conquer-display-none')
        
    }
    addNewRegisterError(error: string): void {
        this.unsetLoginAndRegisterErrors()
        this.conquerLoginSuccess.classList.add('conquer-display-none')
        this.conquerRegisterError.innerText = error
        this.conquerRegisterError.classList.remove('conquer-display-none')
    }
    async run() {
        this.fillConquerLogin()
        this.fillConquerRegister()
        const isLogged = await this.isLogged();
        if (!isLogged) {
            this.conquerLogin.classList.remove('conquer-display-none')
        }
        const conquerContainer = this.conquerContainer;
        //layer.on('prerender', (evt) => {
        //  // return
        //    if (evt.context) {
        //        const context = evt.context as CanvasRenderingContext2D;
        //    context.filter = 'grayscale(80%) invert(100%) ';
        //    context.globalCompositeOperation = 'source-over';
        //    }
        //});

        //layer.on('postrender', (evt) => {
        //  if (evt.context) {
        //    const context = evt.context as CanvasRenderingContext2D;
        //    context.filter = 'none';
        //  }
        //});
        olProj.useGeographic();
        this.map = new Map({
            target: conquerContainer,
            layers: [
                new TileLayer({
                    source: new OSM()
                })
            ],
            view: new View({
                zoom: 21,
                maxZoom: 22,
            }),
        });
        const proccessLocation = (location: GeolocationPosition) => {
            this.currentLatitude =  location.coords.latitude
            this.currentLongitude = location. coords.longitude
            if (location.coords.heading !== null && (this.alpha != 0 || this.beta != 0 || this.gamma != 0) && !this.disableSetRotationOffset) {
                this.disableSetRotationOffset = true
                this.heading = location.coords.heading
                this.rotationOffset = this.compassHeading(this.alpha, this.beta, this.gamma) + (location.coords.heading*Math.PI*2)/360 
            }
            this.setCenterDisplaced(this.currentLatitude, this.currentLongitude)
        }
        this.setCenterDisplaced(37.58237, -5.96766)
        navigator.geolocation.watchPosition((location) => {
            proccessLocation(location)
        }, (err) => {
            return
        }, {
            enableHighAccuracy: true,
            maximumAge: 0
        });
        window.setInterval(() => {
            this.disableSetRotationOffset = false
        }, 10000);
        window.setTimeout(() => {
            window.setInterval(() => {
                navigator.geolocation.getCurrentPosition((location) => {
                    proccessLocation(location)
                }, () => {
                    return
                }, {
                    enableHighAccuracy: true,
                    maximumAge: 0
                })
            }, 1000)
        }, 1000)
        if (window.DeviceOrientationEvent) {
            window.addEventListener("deviceorientation", (event) => {
                if (event.alpha !== null && event.beta !== null && event.gamma !== null) {
                    this.onRotate(event.alpha, event.beta, event.gamma);
                }
            }, true);
        }
    }
    realCoordinatesToOl(lat: number, lon: number): number[] {
        return olProj.transform(
            [lon, lat],
            new Projection({ code: "WGS84" }),
            new Projection({ code: "EPSG:900913" }),
        );
    }
    compassHeading(alpha:number, beta:number, gamma:number): number {
        const alphaRad = alpha * (Math.PI / 180);
        return alphaRad
        let betaRad = beta * (Math.PI / 180);
        const gammaRad = gamma * (Math.PI / 180);
        betaRad = 1.5707963268;
        const cA = Math.cos(alphaRad);
        const sA = Math.sin(alphaRad);
        const sB = Math.sin(betaRad);
        const cG = Math.cos(gammaRad);
        const sG = Math.sin(gammaRad);

        const rA = - cA * sG - sA * sB * cG;
        const rB = - sA * sG + cA * sB * cG;

        return Math.atan2(rA, rB)
    }

    logToServer(logValue: string) {
        const urlLog = new URL('/conquer/log', window.location.protocol + '//' + window.location.hostname + ':' + window.location.port)
        urlLog.searchParams.append('log', logValue) 
        fetch(urlLog).then(() => {
            return
        }).catch((error) => {
            console.error(error)
        })
    }
    enabledOnRotate = true;
    onRotate(alpha: number, beta: number, gamma: number) {
        if (this.enabledOnRotate) {
            this.alpha = alpha
            this.beta = beta 
            this.gamma = gamma 
            this.enabledOnRotate = false
	    this.map.getView().setRotation((this.compassHeading(alpha, beta, gamma) - this.rotationOffset))

	    
            window.setTimeout(() => {
                this.enabledOnRotate = true
            }, 10)
        }
        this.setCenterDisplaced(this.currentLatitude, this.currentLongitude)
    }
    constructor(conquerContainer: HTMLDivElement) {
        this.conquerContainer = conquerContainer;
    }
    private async isLogged(): Promise<boolean> {
        return false 
        // return fetch("/conquer/user")
        //    .then(async (res): Promise<boolean> => {
        //        const data = await res.json();
        //        if (data === null) {
        //            return false;
        //        }
        //        return true;
        //    })
        //    .catch((error) => {
        //        console.error(error);
        //        return false;
        //    });
    }
}