import { faker } from "@faker-js/faker";

// maps to firestore root collection: EmailThread
class EmailThread {
	id: string;
	eeid: string; // emailengine thread id
	subject: ThreadSubject;
	participants: Participants;
}

class ThreadSubject {
	default: string;
	[userId: string]: string;
}

interface Participants {
	to: Participant[];
	cc?: Participant[];
	bcc?: Participant[];
}

// map to a Specta user or external contact (eventually, will be part of a Contact model)
class Participant {
	type: "specta" | "external";
	userId?: string;
	email?: string;
	name?: string;
}

enum ThreadMessageType {
	message = "message",
	suggestion = "suggestion",
	loopIn = "loopIn",
	forward = "forward",
	partialReply = "partialReply",
}

// subclasses of ThreadItem map to firestore root collection: EmailThreadMessages
abstract class ThreadItem {
	id: string;
	from: Participant;
	type: ThreadMessageType;
	eeid?: string; // emailengine message id
	participants: Participants;
	attachments?: [];
	content?: string;
	banner?: ThreadItemBanner;
	hasMessage: Boolean;
	messageIsCollapsed: Boolean;
}

class ThreadItemBanner {
	content: string;
	isInline: Boolean;
	printBanner?(): string;

	constructor(content: string, isInline = false) {
		this.content = content;
		this.isInline = isInline;
	}
}

class ThreadMessage extends ThreadItem {
	type = ThreadMessageType.message;
	content = faker.lorem.sentence(Math.floor(Math.random() * 5) + 1);
	hasMessage = true;
	messageIsCollapsed = false;

	getContent(): Promise<Response> {
		return fetch(`https://mail.joinspecta.com/api/v1/emails/${this.eeid}`);
	}
}

class ThreadSuggestion extends ThreadItem {
	type = ThreadMessageType.suggestion;
	hasMessage = false;
	suggestionTo: Participant;

	constructor() {
		super();
		const bannerContent = `${this.suggestionTo.name} was suggested to reply by ${this.from.name}`;
		this.banner = new ThreadItemBanner(bannerContent);
	}
}

class ThreadLoopIn extends ThreadItem {
	type = ThreadMessageType.loopIn;
	hasMessage = true;
	messageIsCollapsed = true;
	loopedIn: Participants[];
	formattedParticipants = ""; // todo

	constructor() {
		super();
		const bannerContent = `${this.formattedParticipants} has been added to the email chain.`;
		this.banner = new ThreadItemBanner(bannerContent);
	}
}

class ThreadForward extends ThreadItem {
	type = ThreadMessageType.forward;
	bannerOnly = false;
	hasMessage = true;
	messageIsCollapsed = true;
	formattedParticipants = ""; // todo

	constructor() {
		super();
		const bannerContent = `Forwarded to ${this.formattedParticipants}`;
		this.banner = new ThreadItemBanner(bannerContent);
	}
}

class ThreadPartialReply extends ThreadItem {
	type = ThreadMessageType.partialReply;
	bannerOnly = false;
	hasBanner = true;
	hasMessage = true;
	bannerIsInline = true;
	messageIsCollapsed = false;
	formattedParticipants = ""; // todo

	constructor() {
		super();
		const bannerContent = `Reply to ${this.formattedParticipants}`;
		this.banner = new ThreadItemBanner(bannerContent, true);
	}
}

/// BELOW HERE I JUST PLAYED WITH GENERATING AN EMAIL THREAD, PROBABLY NOTHING TO SEE HERE

const getChoiceFromArray = (array: any[]) =>
	array[Math.floor(Math.random() * array.length)];

// fetch email content from emailengine

const urlprefix = "https://mail.joinspecta.com/";
const getEmailContent = async (eeid: string) => {
	const response = await fetch(`${urlprefix}api/v1/threads/${eeid}`);
	const data = await response.json();
	return data;
};

function getThreadItem(): ThreadItem {
	const random = Math.random();
	let threadItem;
	if (random < 0.4) {
		threadItem = new ThreadMessage();
	} else {
		const randomType = Math.floor(Math.random() * 4);

		switch (randomType) {
			case 0:
				threadItem = new ThreadSuggestion();
			case 1:
				threadItem = new ThreadLoopIn();
			case 2:
				threadItem = new ThreadForward();
			case 3:
				threadItem = new ThreadPartialReply();
		}
	}
	threadItem.id = faker.datatype.uuid();
	return threadItem;
}
let participants = Array();

for (let i = 0; i < 4; i++) {
	let p = <Participant>{
		type: getChoiceFromArray(["specta", "external"]),
		userId: faker.datatype.uuid(),
		email: faker.internet.email(),
		name: faker.name.fullName(),
	};
	participants.push(p);
}

let ps = <Participants>{ to: participants };

// create an array of 20 messages.
// instantiate each message with getThreadMessage()
// if message is a message

let messages = Array();
for (let i = 0; i < 10; i++) {
	let currentUser = getChoiceFromArray(participants);
	let recipient = getChoiceFromArray(
		participants.filter((p) => p !== currentUser)
	);

	let m = getThreadItem();
	m.from = currentUser;
	m.participants = ps;
	messages.push(m);
}
// messages.push(m);

// console.log(messages);

// todo: add normalizer for thread id

let thread = <EmailThread>{
	id: "1",
	eeid: "1",
	subject: { default: "Hello" },
	participants: ps,
};

let messageCount = 0;
messages.forEach((m) => {
	if (m.type === ThreadMessageType.message) {
		messageCount++;
		console.log("MESSAGE " + messageCount);
		console.log(
			"TO: " +
				m.participants.to.map((p: Participant) => p.email).join(", ")
		);
		console.log("FROM: " + m.from.email);
		console.log(m.content);
	} else {
		console.log(m.banner.toUpperCase());
		if (!m.bannerOnly) {
			console.log(
				m.from.name,
				m.participants.to.map((p: Participant) => p.name).join(", ")
			);
		}
	}
	console.log("------");
});