import { ServerAuth } from "/js/connect/auth.js";

function randint(min, max) {
	return Math.ceil((Math.random() * (max - min)) + min);
}

function getTraceId() {
	const dict = "1234567890abcdefABCDEF";
	return [...new Array(16)]
		.map(() => dict[randint(0, dict.length - 1)])
		.join("");
}

const curUrl = new URL(location.href);
const [address, port] = curUrl.searchParams.get("server").split(/:/);
const isTLSmode = curUrl.searchParams.get("encrypted") === "true";

class ProtoApiMethods {
	constructor (api) {
		this.api = api;
	}
	
	async _protoMethod (rqdata, threadcb = null) {
		const socket = this.api.socket;
		const trace_id = getTraceId()
		
		const promise = new Promise((rs, rj) => {
			socket.onmessage = (ev) => {
				ev = JSON.parse(ev.data);
				const data = ev.result;
				console.debug("Method sended:", ev);
				if (ev.trace_id === trace_id)
					if (ev.warning)
						console.warn("Method warning:", ev.warning, "\ndetails:", ev);
					if (!!ev.ended)
						return rs(data);
					if (typeof threadcb === 'function')
						threadcb(data);
			};
			socket.onerror = (err) => rj(err);
		});
		console.debug("Client send:", { trace_id, ...rqdata });
		socket.send(
			JSON.stringify({ trace_id, ...rqdata }),
		);
		return await promise;
	}
}

class ApiMethods extends ProtoApiMethods {
	async _protoMethod (rqdata) {
		throw new Error("_protoMethod allowed only into abstract class");
	}
	
	constructor (api) {
		super(api);
	}
	
	async info (fields = null, fieldsExtSource = null) {
		return await super._protoMethod({
			method: "info",
			fields: fields?.join(",") ?? "*",
			fieldsExtSource: fieldsExtSource?.join(",") ?? "*",
		});
	}
	
	async authed () {
		return await super._protoMethod({
			method: "authed",
		});
	}
	
	async token (token) {
		return await super._protoMethod({
			method: "token", token
		});
	}
	
	async login (username, password, gtf = false) {
		return await super._protoMethod({
			method: "login",
			username, password,
			gtf
		});
	}
}

class ApiHTML {
	constructor (api) {
		this.api = api;
	}
	
	async renderMainMenu (user, bgUrl = null, favicon = null) {
		bgUrl = bgUrl ?? "assets/hello/1.png";
		favicon = favicon ?? "favicon.png";
		
		document.body.style.backgroundImage = `url(${
			JSON.stringify(bgUrl)
		})`;
		document.body.style.backgroundSize = `${screen.width}px ${screen.height}px`;
		$.find('link[rel="icon"]')[0].href = favicon;
		
		document.getElementById("server.area").innerHTML = '';
		$(document.getElementById("server.area")).append(ServerAuth.mainMenuForm);
	}
	
	async renderAuth (authMode, bgUrl = null, favicon = null) {
		bgUrl = bgUrl ?? "assets/hello/1.png";
		favicon = favicon ?? "favicon.png";
		
		document.body.style.backgroundImage = `url(${
			JSON.stringify(bgUrl)
		})`;
		document.body.style.backgroundSize = `${screen.width}px ${screen.height}px`;
		$.find('link[rel="icon"]')[0].href = favicon;
		
		document.getElementById("server.area").innerHTML = '';
		$(document.getElementById("server.area")).append(ServerAuth.authForm);
		
		$.find("#server-code-form")[0].hidden = authMode !== "password";
		
		[...$.find(".auth-act-item")].forEach(authEl => {
			const authElJQ = $(authEl);
			const isHidden = authEl.hidden;
			authEl.hidden = false;
			const buttonBlock = authElJQ.find(".btn-auth-block")[0];
			const paramsBlock = authElJQ.find(".params-auth")[0];
			
			buttonBlock.style.marginTop = `calc(100% - ${paramsBlock.offsetHeight}px)`;
			authEl.hidden = isHidden;
		});
		
		$.find("#menu-log-in")[0].onclick = function () {
			$.find("#log-in")[0].hidden = false;
			$.find("#register")[0].hidden = true;
		}
		
		$.find("#menu-register")[0].onclick = function () {
			$.find("#log-in")[0].hidden = true;
			$.find("#register")[0].hidden = false;
		}
		
		$.find("#auth-btn")[0].onclick = () => {
			this.api.methods.login(
				$.find("#username")[0].value,
				$.find("#password")[0].value,
				true
			)
			.then(user => {
				const { token } = user;
				localStorage.setItem(`my-token>${!isTLSmode ? "ws" : "wss"}://${address}:${port}`, token);
				this.renderMainMenu(user, bgUrl, favicon);
			});
		}
		$.find("#reg-btn")[0].onclick = () => { }
	}
}

export class ApiSocket {
	constructor ({
		isTLSmode, address, port
	}) {
		this.tlsMode = isTLSmode;
		this.address = address;
		this.port = port;
		
		this.socket = new WebSocket(`${!isTLSmode ? "ws" : "wss"}://${address}:${port}`);
		this.methods = new ApiMethods(this);
		this.user = null;
		
		this.html = new ApiHTML(this);
	}
	
	async run () {
		const socket = this.socket;
		const promise = new Promise((rs, rj) => {
			socket.onopen = () => this.methods.info().then(data => rs(data));
			socket.onerror = (err) => rj(err);
		});
		return await promise;
	}
}