const App = {
	persona: {
		slug: "",
		text: "",
	},
	messages: [] as Message[],
	/// HTMLElements
	messagesRoot: document.querySelector('div.messages') as HTMLDivElement,
	divPersona:   document.querySelector('div.persona') as HTMLDivElement,
	linkSuggest:  document.querySelector('.chat-suggestion .js-suggestion') as HTMLLinkElement,
	sliders:      Array.from(
		document.querySelectorAll('.decoder-settings input.slider')
	) as HTMLInputElement[],
};

document.addEventListener('DOMContentLoaded', () => {
	/**
	 * Persona
	 * - in simple mode, we just re-format the text slightly to make it prettier.
	 * - in attention mode, we tokenize and add spans around every token.
	 */
	const simplePersona = () => {
		const text = App.persona.text;
		const html = text.split('.').map(x => Utils.capitalize(x)).join(`.<br>`);
		App.divPersona.innerHTML = html;
	};
	const tokenizePersona = () => {
		const text = App.persona.text;
		const tokens = text.split(/\b/).filter(x => ! /\s/.test(x));
		let html = ``;
		for (let [i, tok] of tokens.entries()) {
			if (i === 0) {
				html += `<span data-idx="${i}">${ Utils.capitalize(tok) }</span>`;
			} else if (i > 0 && tokens[i-1] === '.') {
				html += `<br><span data-idx="${i}">${ Utils.capitalize(tok) }</span>`;
			} else if (/[.,']/.test(tok)) {
				html += `<span data-idx="${i}">${ tok }</span>`;
			} else {
				html += ` <span data-idx="${i}">${ tok }</span>`;
			}
		}
		App.divPersona.innerHTML = html;
	};
	App.persona = (<any>window).PERSONA_ATLOAD;
	// ^^ tokenizePersona();
	simplePersona();
	document.querySelector('.js-shuffle')!.addEventListener('click', async (evt) => {
		evt.preventDefault();
		App.persona = await Api.shared.getShuffle();
		tokenizePersona();
		history.replaceState(null, "", `/persona/${App.persona.slug}`);
		/// Also reset messages and reload suggestion.
		App.messages = [];
		App.messagesRoot.innerHTML = "";
		loadSuggestion();
	});
	document.querySelector('.js-share')!.addEventListener('click', async (evt) => {
		evt.preventDefault();
		history.replaceState(null, "", `/persona/${App.persona.slug}`);
		const text = `Chat with me: ${ App.divPersona.innerText.replace(/\n/g, " ") }`;
		window.open(`https://twitter.com/share?url=${ encodeURIComponent(window.location.href) }&text=${ encodeURIComponent(text) }`);
	});
	
	/**
	 * Settings
	 */
	const handleSliderChange = (slider: HTMLInputElement) => {
		const div = slider.parentNode as HTMLDivElement;
		const spanVal = div.querySelector('.js-val') as HTMLSpanElement;
		const value = Number.isInteger(slider.valueAsNumber)
			? slider.valueAsNumber
			: Number(slider.valueAsNumber.toFixed(2))
		;
		spanVal.innerText = value.toString();
		const min = Number(slider.getAttribute('min'));
		const max = Number(slider.getAttribute('max'));
		if (value < min + (max - min) / 3) {
			spanVal.className = "js-val green";
		} else if (value < min + 2 * (max - min) / 3) {
			spanVal.className = "js-val orange";
		} else {
			spanVal.className = "js-val red";
		}
		const isInverted = slider.classList.contains('js-inverted');
		if (isInverted) {
			if (spanVal.classList.contains('green')) {
				spanVal.classList.remove('green');
				spanVal.classList.add('red');
			} else if (spanVal.classList.contains('red')) {
				spanVal.classList.remove('red');
				spanVal.classList.add('green');
			}
		}
	};
	for (const slider of App.sliders) {
		handleSliderChange(slider);
		slider.addEventListener('input', () => {
			handleSliderChange(slider);
		});
	}
	
	const gauge = document.querySelector('div.gauge') as HTMLDivElement;
	gauge.addEventListener('click', () => {
		gauge.classList.add('active');
	});
	const gaugeEls = Array.from(
		document.querySelectorAll('.gauge .gauge-el-wrapper')
	);
	for (const gaugeEl of gaugeEls) {
		gaugeEl.addEventListener('click', () => {
			const i = gaugeEls.indexOf(gaugeEl);
			if (i === 0) {
				App.sliders[0].value = `180`;
				App.sliders[1].value = `0.1`;
				App.sliders[2].value = `1.9`;
			} else if (i === 1) {
				App.sliders[0].value = `70`;
				App.sliders[1].value = `0.5`;
				App.sliders[2].value = `1.2`;
			} else {
				App.sliders[0].value = `0`;
				App.sliders[1].value = `0.9`;
				App.sliders[2].value = `0.6`;
			}
			for (const slider of App.sliders) {
				handleSliderChange(slider);
			}
		});
	}
	
	/**
	 * Chat input
	 */
	const form  = document.querySelector('form.js-form') as HTMLFormElement;
	const input = document.querySelector('input.input-message') as HTMLInputElement;
	form.addEventListener('submit', async (evt) => {
		evt.preventDefault();
		document.querySelector<HTMLDivElement>('.placeholder-start')!.style.display = 'none';
		const content = input.value;
		if (content.trim() === "") {
			c.debug(`Empty input`);
			return ;
		}
		input.value = "";
		const um: Message = {
			incoming: false,
			content: content,
		};
		Markup.append(um);
		const o = await Api.shared.postWithSettings({ text: content }, {
			context: App.messages,
			persona: App.persona.text,
		});
		c.log(o);
		// c.log(o.attention[0]);
		// c.log(o.attention[1]);
		// c.log(o.attention[2]);
		App.messages.push(um);
		/// ^^ not before the API call because it shouldn't be included in context.
		/**
		 * Visualize Attention
		 */
		// for (const [idx, [token, att]] of o.attention[0].entries()) {
		// 	if (att === 0) {
		// 		continue;
		// 	}
		// 	const span = document.querySelector(`.persona span[data-idx="${idx}"]`);
		// 	if (!span) {
		// 		c.error(`span not found`);
		// 		return ;
		// 	}
		// 	span.className = `attention-level level${ Markup.attentionThreshold(att) }`;
		// }
		//////
		const m: Message = {
			incoming: true,
			content: o.text,
		};
		App.messages.push(m);
		Markup.append(m);
		/// Finally, launch an auto-complete:
		loadSuggestion();
	});
	
	
	/**
	 * Suggestion box
	 */
	const loadSuggestion = async () => {
		const spanLoading = document.querySelector('.chat-suggestion .js-loading') as HTMLSpanElement;
		spanLoading.classList.remove('hide');
		App.linkSuggest.classList.add('hide');
		const o = await Api.shared.postWithSettings({ completion: "" }, {
			context: App.messages,
			persona: App.persona.text,
		});
		c.log(o);
		App.linkSuggest.innerText = o.text;
		spanLoading.classList.add('hide');
		App.linkSuggest.classList.remove('hide');
	};
	loadSuggestion();
	App.linkSuggest.addEventListener('click', async (evt) => {
		evt.preventDefault();
		App.linkSuggest.classList.add('hide');
		input.value = App.linkSuggest.innerText;
		await Utils.delay(500);
		const sendBtn = form.querySelector('button.input-button') as HTMLButtonElement;
		sendBtn.click();
		/// ^^ do not do `form.submit()` as we want to trigger our handler.
	});
});