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

class TfTabNewsElement extends LitElement {
	static get properties() {
		return {
			whoami: {type: String},
			users: {type: Object},
			hash: {type: String},
			unread: {type: Array},
			following: {type: Array},
			drafts: {type: Object},
			expanded: {type: Object},
			loading: {type: Boolean},
			channels: {type: Array},
			channels_unread: {type: Object},
			channels_latest: {type: Object},
		};
	}

	static styles = styles;

	constructor() {
		super();
		let self = this;
		this.whoami = null;
		this.users = {};
		this.hash = '#';
		this.unread = [];
		this.following = [];
		this.cache = {};
		this.drafts = {};
		this.expanded = {};
		this.channels_unread = {};
		this.channels_latest = {};
		this.channels = [];
		tfrpc.rpc.localStorageGet('drafts').then(function (d) {
			self.drafts = JSON.parse(d || '{}');
		});
	}

	connectedCallback() {
		super.connectedCallback();
		document.body.addEventListener('keypress', this.on_keypress.bind(this));
	}

	disconnectedCallback() {
		super.disconnectedCallback();
		document.body.removeEventListener('keypress', this.on_keypress.bind(this));
	}

	show_more() {
		let unread = this.unread;
		let news = this.shadowRoot?.getElementById('news');
		if (news) {
			console.log('injecting messages', news.messages);
			news.add_messages(
				Object.values(Object.fromEntries(this.unread.map((x) => [x.id, x])))
			);
			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 = 'private';
			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(', ')
		);
	}

	draft(event) {
		let id = event.detail.id || '';
		let previous = this.drafts[id];
		if (event.detail.draft !== undefined) {
			this.drafts[id] = event.detail.draft;
		} else {
			delete this.drafts[id];
		}
		this.drafts = Object.assign({}, this.drafts);
		tfrpc.rpc.localStorageSet('drafts', JSON.stringify(this.drafts));
	}

	on_expand(event) {
		if (event.detail.expanded) {
			let expand = {};
			expand[event.detail.id] = true;
			this.expanded = Object.assign({}, this.expanded, expand);
		} else {
			delete this.expanded[event.detail.id];
			this.expanded = Object.assign({}, this.expanded);
		}
	}

	on_keypress(event) {
		if (event.target === document.body && event.key == '.') {
			this.show_more();
		}
	}

	unread_status(channel) {
		if (this.channels_latest[channel] &&
			(this.channels_unread[channel] === undefined ||
			this.channels_unread[channel] < this.channels_latest[channel])) {
			return '🔵';
		}
	}

	show_sidebar() {
		this.renderRoot.getElementById('sidebar').style.display = 'block';
		this.renderRoot.getElementById('main').style.marginLeft = '2in';
		this.renderRoot.getElementById('show_sidebar').style.display = 'none';
	}

	hide_sidebar() {
		this.renderRoot.getElementById('sidebar').style.display = 'none';
		this.renderRoot.getElementById('main').style.marginLeft = '0';
		this.renderRoot.getElementById('show_sidebar').style.display = 'block';
	}

	async channel_toggle_subscribed() {
		let channel = this.hash.substring(2);
		let subscribed = this.channels.indexOf(channel) != -1;
		subscribed = !subscribed;

		await tfrpc.rpc.appendMessage(this.whoami, {
			type: 'channel',
			channel: channel,
			subscribed: subscribed,
		});
		if (subscribed) {
			this.channels = [].concat([channel], this.channels).sort();
		} else {
			this.channels = this.channels.filter(x => x != channel);
		}
	}

	channel() {
		return this.hash.startsWith('##') ? this.hash.substring(2) : undefined;
	}

	render() {
		let profile = this.hash.startsWith('#@')
			? html`<tf-profile
					class="tf-profile"
					id=${this.hash.substring(1)}
					whoami=${this.whoami}
					.users=${this.users}
				></tf-profile>`
			: undefined;
		let edit_profile;
		if (
			!this.loading &&
			this.users[this.whoami]?.name === undefined &&
			this.hash.substring(1) != this.whoami
		) {
			edit_profile = html` <div
				class="w3-panel w3-padding w3-round w3-card-4 w3-theme-l3"
			>
				ℹ️ Follow your identity link ☝️ above to edit your profile and set your
				name.
			</div>`;
		}
		return html`
			<div class="w3-sidebar w3-bar-block w3-theme-d1" style="width: 2in; left: 0" id="sidebar">
				<div class="w3-right w3-button" @click=${this.hide_sidebar}>&times;</div>
				${this.hash.startsWith('##') && this.channels.indexOf(this.hash.substring(2)) == -1 ?
					html`
						<div class="w3-bar-item w3-theme-d2">Viewing</div>
						<a href="#" class="w3-bar-item w3-button" style="font-weight: bold">${this.hash.substring(2)}</a>
					` :
					undefined}
				<div class="w3-bar-item w3-theme-d2">Channels</div>
				<a href="#" class="w3-bar-item w3-button" style=${this.hash == '#' ? 'font-weight: bold' : undefined}>general ${this.unread_status('')}</a>
				${this.channels.map(x => html`
					<a
						href=${'#' + encodeURIComponent('#' + x)}
						class="w3-bar-item w3-button"
						style=${this.hash == '##' + x ? 'font-weight: bold' : undefined}>#${x} ${this.unread_status(x)}</a>
				`)}
			</div>
			<div style="margin-left: 2in; padding: 8px" id="main">
				<div id="show_sidebar" class="w3-left w3-button" style="display: none" @click=${this.show_sidebar}>&#9776;</div>
				<p>
					<button
						class="w3-button w3-theme-d1"
						@click=${this.show_more}
					>
						${this.new_messages_text()}
					</button>
					${this.hash.startsWith('##') ?
						html`
							<button class="w3-button w3-theme-d1" @click=${this.channel_toggle_subscribed}>
								${this.channels.indexOf(this.hash.substring(2)) != -1 ? 'Unsubscribe from #' : 'Subscribe to #'}${this.hash.substring(2)}
							</button>
						` :
						undefined}
				</p>
				<div class="w3-bar">
					Welcome, <tf-user id=${this.whoami} .users=${this.users}></tf-user>!
					${edit_profile}
				</div>
				<div>
					<tf-compose
						id="tf-compose"
						whoami=${this.whoami}
						.users=${this.users}
						.drafts=${this.drafts}
						@tf-draft=${this.draft}
						.channel=${this.channel()}
					></tf-compose>
				</div>
				${profile}
				<tf-tab-news-feed
					id="news"
					whoami=${this.whoami}
					.users=${this.users}
					.following=${this.following}
					hash=${this.hash}
					.drafts=${this.drafts}
					.expanded=${this.expanded}
					@tf-draft=${this.draft}
					@tf-expand=${this.on_expand}
					.channels_unread=${this.channels_unread}
				></tf-tab-news-feed>
			</div>
		`;
	}
}

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