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},
			following: {type: Array},

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

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

			adding_editor: {type: Boolean},
		};
	}

	constructor() {
		super();
		this.ids = [];
		this.owner_ids = [];
		this.following = [];
		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');
		this.following = Object.keys(await tfrpc.rpc.following([this.whoami], 2)).sort();

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

	async read_wikis() {
		let max_rowid;
		let wikis;
		let start_whoami = this.whoami;
		while (true)
		{
			console.log('read_wikis', this.whoami);
			[max_rowid, wikis] = await tfrpc.rpc.collection(this.following, 'wiki', undefined, max_rowid, wikis, false);
			console.log('read ->', wikis);
			if (this.whoami !== start_whoami) {
				break;
			}
			console.log('wikis =>', 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.wiki?.editors, '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.adding_editor = false;
		this.update_hash();
		this.read_wiki_docs();
	}

	async on_wiki_create(event) {
		await tfrpc.rpc.appendMessage(this.whoami, {
			type: 'wiki',
			name: event.detail.name,
		});
	}

	async on_wiki_rename(event) {
		await tfrpc.rpc.appendMessage(this.whoami, {
			type: 'wiki',
			key: event.detail.id,
			name: event.detail.name,
		});
	}

	async on_add_editor(event) {
		let id = this.shadowRoot.getElementById('add_editor').value;
		let editors = [...this.wiki.editors];
		if (editors.indexOf(id) == -1) {
			editors.push(id);
			editors.sort();
		}
		await tfrpc.rpc.appendMessage(this.whoami, {
			type: 'wiki',
			key: this.wiki.id,
			editors: editors,
		});
		this.adding_editor = false;
	}

	async on_wiki_tombstone(event) {
		await tfrpc.rpc.appendMessage(this.whoami, {
			type: 'wiki',
			key: event.detail.id,
			tombstone: {
				date: new Date().valueOf(),
				reason: 'tombstoned by user',
			},
		});
	}

	async on_wiki_doc_create(event) {
		await tfrpc.rpc.appendMessage(this.whoami, {
			type: 'wiki-doc',
			parent: this.wiki.id,
			name: event.detail.name,
		});
	}

	async on_wiki_doc_rename(event) {
		await tfrpc.rpc.appendMessage(this.whoami, {
			type: 'wiki-doc',
			parent: this.wiki.id,
			key: event.detail.id,
			name: event.detail.name,
		});
	}

	async on_wiki_doc_tombstone(event) {
		await tfrpc.rpc.appendMessage(this.whoami, {
			type: 'wiki-doc',
			parent: this.wiki.id,
			key: event.detail.id,
			tombstone: {
				date: new Date().valueOf(),
				reason: 'tombstoned by user',
			},
		});
	}

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

	updated(changed_properties) {
		if (changed_properties.has('whoami')) {
			this.wikis = {};
			this.wiki_docs = {};
			this.read_wikis();
		}
	}

	render() {
		let self = this;
		return html`
			<div>
				<tf-id-picker .ids=${this.ids} selected=${this.whoami} @change=${this.on_whoami_changed} ?hidden=${!this.ids?.length}></tf-id-picker>
			</div>
			<div>
				${keyed(this.whoami, html`<tf-collection
					.collection=${this.wikis}
					whoami=${this.whoami}
					selected_id=${this.wiki?.id}
					@create=${this.on_wiki_create}
					@rename=${this.on_wiki_rename}
					@tombstone=${this.on_wiki_tombstone}
					@change=${this.on_wiki_changed}></tf-collection>`)}
				${keyed(this.wiki_doc?.id, html`<tf-collection
					.collection=${this.wiki_docs}
					whoami=${this.whoami}
					selected_id=${(this.wiki_doc && this.wiki_doc?.parent == this.wiki?.id) ? this.wiki_doc?.id : ''}
					@create=${this.on_wiki_doc_create}
					@rename=${this.on_wiki_doc_rename}
					@tombstone=${this.on_wiki_doc_tombstone}
					@change=${this.on_wiki_doc_changed}></tf-collection>`)}
				<div ?hidden=${!this.wiki?.editors}>
					Editors: ${this.wiki?.editors}
					<button @click=${() => self.adding_editor = true} ?hidden=${this.wiki?.editors?.indexOf(this.whoami) == -1 || this.adding_editor}>+</button>
					<div ?hidden=${!this.adding_editor}>
						<label for="add_editor">Add Editor:</label>
						<input type="text" id="add_editor"></input>
						<button @click=${this.on_add_editor}>Add Editor</button>
						<button @click=${() => self.adding_editor = false}>x</button>
					</div>
				</div>
			</div>
			${this.wiki_doc && this.wiki_doc.parent === this.wiki?.id ? html`
				<tf-wiki-doc
					whoami=${this.whoami}
					.value=${this.wiki_doc}></tf-wiki-doc>
			` : undefined}
		`;
	}
}

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