import {LitElement, html, unsafeHTML, until} from './lit-all.min.js';
import * as tfrpc from '/static/tfrpc.js';
import {styles} from './tf-styles.js';

class TfTabNewsFeedElement extends LitElement {
	static get properties() {
		return {
			whoami: {type: String},
			users: {type: Object},
			hash: {type: String},
			following: {type: Array},
			messages: {type: Array},
		}
	}

	static styles = styles;

	constructor() {
		super();
		let self = this;
		this.whoami = null;
		this.users = {};
		this.hash = '#';
		this.following = [];
	}

	async fetch_messages() {
		if (this.hash.startsWith('#@')) {
			return await tfrpc.rpc.query(
				`
					SELECT messages.*
					FROM messages
					WHERE messages.author = ?
					ORDER BY sequence DESC
					LIMIT 20
				`,
				[
					this.hash.substring(1),
				]);
		} else if (this.hash.startsWith('#%')) {
			return await tfrpc.rpc.query(
				`
					SELECT messages.*
					FROM messages
					WHERE id = ?
				`,
				[
					this.hash.substring(1),
				]);
		} else {
			return await tfrpc.rpc.query(
				`
					SELECT messages.*
					FROM messages
					JOIN json_each(?) AS following ON messages.author = following.value
					WHERE messages.timestamp > ?
					ORDER BY messages.timestamp DESC
				`,
				[
					JSON.stringify(this.following),
					new Date().valueOf() - 24 * 60 * 60 * 1000,
				]);
		}
	}

	render() {
		if (!this.messages ||
			this._messages_hash !== this.hash ||
			this._messages_following !== this.following) {
			console.log('loading messages');
			let self = this;
			this.messages = [];
			this._messages_hash = this.hash;
			this._messages_following = this.following;
			this.fetch_messages().then(function(messages) {
				self.messages = messages;
			});
		}
		return html`<tf-news id="news" whoami=${this.whoami} .users=${this.users} .messages=${this.messages} .following=${this.following}></tf-news>`;
	}
}

class TfTabNewsElement extends LitElement {
	static get properties() {
		return {
			whoami: {type: String},
			users: {type: Object},
			hash: {type: String},
			unread: {type: Array},
			following: {type: Array},
		}
	}

	static styles = styles;

	constructor() {
		super();
		let self = this;
		this.whoami = null;
		this.users = {};
		this.hash = '#';
		this.unread = [];
		this.following = [];
		this.cache = {};
	}

	show_more() {
		let unread = this.unread;
		let news = this.renderRoot?.getElementById('news');
		if (news) {
			console.log('injecting messages', news.messages);
			news.messages = [...this.unread, ...news.messages];
			this.dispatchEvent(new CustomEvent('refresh'));
		}
	}

	new_messages_text() {
		if (!this.unread?.length) {
			return 'No new messages.';
		}
		let counts = {};
		for (let message of this.unread) {
			let type = 'unknown';
			try {
				type = JSON.parse(message.content).type || type;
			} catch {
			}
			counts[type] = (counts[type] || 0) + 1;
		}
		return 'Show New: ' + Object.keys(counts).sort().map(x => (counts[x].toString() + ' ' + x + 's')).join(', ');
	}

	render() {
		let profile = this.hash.startsWith('#@') ?
			html`<tf-profile id=${this.hash.substring(1)} whoami=${this.whoami} .users=${this.users}></tf-profile>` : undefined;
		return html`
			<div><input type="button" value=${this.new_messages_text()} @click=${this.show_more}></input></div>
			<a target="_top" href="#" ?hidden=${this.hash.length <= 1}>🏠Home</a>
			<div>Welcome, <tf-user id=${this.whoami} .users=${this.users}></tf-user>!</div>
			<div><tf-compose whoami=${this.whoami} .users=${this.users}></tf-compose></div>
			${profile}
			<tf-tab-news-feed id="news" whoami=${this.whoami} .users=${this.users} .following=${this.following} hash=${this.hash}></tf-tab-news-feed>
		`;
	}
}

customElements.define('tf-tab-news-feed', TfTabNewsFeedElement);
customElements.define('tf-tab-news', TfTabNewsElement);