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

class TfCollectionsAppElement extends LitElement {
	static get properties() {
		return {
			ids: {type: Array},
			owner_ids: {type: Array},
			whoami: {type: String},

			wikis: {type: Object},
			wiki_docs: {type: Object},

			wiki: {type: Object},
			wiki_doc: {type: Object},
			hash: {type: String},
		};
	}

	constructor() {
		super();
		this.ids = [];
		this.owner_ids = [];
		this.load();
		let self = this;
		tfrpc.register(function hash_changed(hash) {
			self.notify_hash_changed(hash);
		});
		tfrpc.rpc.get_hash().then(hash => self.notify_hash_changed(hash));
	}

	async load() {
		this.ids = await tfrpc.rpc.getIdentities();
		this.owner_ids = await tfrpc.rpc.getOwnerIdentities();
		this.whoami = await tfrpc.rpc.localStorageGet('collections_whoami');

		await this.read_wikis();
		await this.read_Wiki_docs();
	}

	async read_wikis() {
		let max_rowid;
		let wikis;
		while (true)
		{
			[max_rowid, wikis] = await tfrpc.rpc.collection(this.owner_ids, 'wiki', undefined, max_rowid, wikis);
			this.wikis = wikis;
			this.update_wiki();
		}
	}

	async read_wiki_docs() {
		if (!this.wiki?.id) {
			return;
		}
		let start_id = this.wiki.id;
		let max_rowid;
		let wiki_docs;
		while (true)
		{
			[max_rowid, wiki_docs] = await tfrpc.rpc.collection(this.owner_ids, 'wiki-doc', this.wiki?.id, max_rowid, wiki_docs);
			if (this.wiki?.id !== start_id) {
				break;
			}
			this.wiki_docs = wiki_docs;
			this.update_wiki_doc();
		}
	}

	hash_wiki() {
		let hash = this.hash ?? '';
		hash = hash.charAt(0) == '#' ? hash.substring(1) : hash;
		let parts = hash.split('/');
		return parts[0];
	}

	hash_wiki_doc() {
		let hash = this.hash ?? '';
		hash = hash.charAt(0) == '#' ? hash.substring(1) : hash;
		let slash = hash.indexOf('/');
		return slash != -1 ? hash.substring(slash + 1) : undefined; 
	}

	update_wiki() {
		let want_wiki = this.hash_wiki();
		for (let wiki of Object.values(this.wikis ?? {})) {
			if (wiki.name === want_wiki) {
				this.wiki = wiki;
				this.read_wiki_docs();
				break;
			}
		}
	}

	update_wiki_doc() {
		let want_wiki_doc = this.hash_wiki_doc();
		for (let wiki_doc of Object.values(this.wiki_docs ?? {})) {
			if (wiki_doc.name === want_wiki_doc) {
				this.wiki_doc = wiki_doc;
			}
		}
	}

	notify_hash_changed(hash) {
		this.hash = hash;
		this.update_wiki();
		this.update_wiki_doc();
	}

	async on_whoami_changed(event) {
		let new_id = event.srcElement.selected;
		await tfrpc.rpc.localStorageSet('collections_whoami', new_id);
		this.whoami = new_id;
	}

	update_hash() {
		tfrpc.rpc.set_hash(this.wiki_doc ? `${this.wiki.name}/${this.wiki_doc.name}` : `${this.wiki.name}`);
	}

	async on_wiki_changed(event) {
		this.wiki = event.detail.value;
		this.wiki_doc = undefined;
		this.wiki_docs = undefined;
		this.update_hash();
		this.read_wiki_docs();
	}

	async on_wiki_doc_changed(event) {
		this.wiki_doc = event.detail.value;
		this.update_hash();
	}

	async on_wiki_publish(event) {
		let blob_id = event.detail.id;
		let message = {
			type: 'wiki-doc',
			key: this.wiki_doc.id,
			parent: this.wiki_doc.parent,
			blob: blob_id,
		};
		if (event.detail.draft) {
			message.recps = this.wiki_doc.editors;
			print(message);
			message = await tfrpc.rpc.encrypt(this.whoami, this.wiki_doc.editors, JSON.stringify(message));
		}
		print(message);
		await tfrpc.rpc.appendMessage(this.whoami, message);
	}

	render() {
		let self = this;
		return html`
			<div>
				<tf-id-picker .ids=${this.ids} selected=${this.whoami} @change=${this.on_whoami_changed}></tf-id-picker>
			</div>
			<div>
				<tf-collection
					.collection=${this.wikis}
					selected_id=${this.wiki?.id}
					@change=${this.on_wiki_changed}></tf-collection>
				${keyed(this.wiki_doc?.id, html`<tf-collection
					.collection=${this.wiki_docs}
					selected_id=${(this.wiki_doc && this.wiki_doc?.parent == this.wiki?.id) ? this.wiki_doc?.id : ''}
					@change=${this.on_wiki_doc_changed}></tf-collection>`)}
			</div>
			${this.wiki_doc && this.wiki_doc.parent === this.wiki?.id ? html`
				<tf-wiki-doc
					whoami=${this.whoami}
					.value=${this.wiki_doc}
					@publish=${this.on_wiki_publish}></tf-wiki-doc>
			` : undefined}
		`;
	}
}

customElements.define('tf-collections-app', TfCollectionsAppElement);