import * as studio from "@storyteller/studio";
import { LitElement, type PropertyValues, html, nothing, unsafeCSS, TemplateResult } from "lit";
import { type Ref, createRef, ref } from "lit/directives/ref.js";
import { customElement, property, state } from "lit/decorators.js";
import { ifDefined } from "lit/directives/if-defined.js";
import { styleMap } from "lit/directives/style-map.js";
import { type ScreenshotReadyEvent } from "@storyteller/studio";
import { DialogElement } from "@storyteller/studio-ui/dialog";
import { bind, on } from "@storyteller/framework";

import { VideoStylePreview } from "./api/VideoStylePreview";

import "./bubble-select.element";

import styles from "./temp-video-preview.element.scss?inline";
import { STYLE_OPTIONS, type VstStyle } from "./inspector-tabs/style-tab";

enum InspectorMode {
	Properties,
	Style
}

@customElement("sts-temp-video-preview")
export class TempVideoPreview extends LitElement {
	@property({ attribute: false })
	trigger?: Ref<HTMLElement>;

	@state() sourceBlob?: Blob;
	@state() resultBlob?: Blob;

	@state() sourceImageUrl?: string;
	@state() resultImageUrl?: string;

	@state() selectedStyle: VstStyle = "anime_2d_flat";
	@state() prompt = "";
	@state() negPrompt = "";

	#temporaryVideoPreviewRef = createRef<DialogElement>();

	protected override willUpdate(changes: PropertyValues<this>): void {
		if (changes.has("trigger")) {
			const prevTrigger = changes.get("trigger");
			prevTrigger?.value?.removeEventListener("click", this.onDialogOpen);

			this.trigger?.value?.addEventListener("click", this.onDialogOpen);
		}

		super.willUpdate(changes)
	}

	override disconnectedCallback(): void {
		this.trigger?.value?.removeEventListener("click", this.onDialogOpen);

		if (this.sourceImageUrl) {
			URL.revokeObjectURL(this.sourceImageUrl);
			this.sourceImageUrl = undefined;
		}

		if (this.resultImageUrl) {
			URL.revokeObjectURL(this.resultImageUrl);
			this.resultImageUrl = undefined;
		}

		super.disconnectedCallback();
	}

	requestScreen = () => {
		studio.requestScreenshot();
		console.log("🟢");
	}

	onDialogOpen = () => {
		studio.requestScreenshot();
	}

	@on("window:screenshot-ready")
	async onScreenshotReady (event: ScreenshotReadyEvent) {
		console.log("🟣",event.detail.data);
		const file = new File(
			[event.detail.data],
			"studio-scene-screen.png",
			{ type: "image/png" },
		);
		this.sourceBlob = file;

		const prevSourceUrl = this.sourceImageUrl;
		this.sourceImageUrl = URL.createObjectURL(this.sourceBlob);

		if (prevSourceUrl)
			URL.revokeObjectURL(prevSourceUrl);

		this.resultImageUrl = undefined;

		try {
			this.resultBlob = await VideoStylePreview({
				video: file,
				request:
					JSON.stringify({
						"style": this.selectedStyle,
						"positive_prompt": this.prompt,
						"negative_prompt": this.negPrompt,
					})
			});
			console.log("🟡", this.resultBlob);
		}
		catch (err) {
			// TODO: Show error message
			console.error(err);
			return;
		}

		const prevResultUrl = this.resultImageUrl;
		this.resultImageUrl = URL.createObjectURL(this.resultBlob);

		if (prevResultUrl)
			URL.revokeObjectURL(prevResultUrl);
	}

	stopTextInputBubbling(event: KeyboardEvent): void {
		// We want modifier keys like "Alt" to always be received by the Bevy
		// canvas because they affect the camera controller behavior, but we do
		// NOT want Bevy to receive typing inputs like W, A, S, and D while the
		// user is trying to type into the Prompt field.
		if (/^(Alt|Control)$/.test(event.key))
			return;

		event.stopPropagation();
	}

	protected override render = (): TemplateResult => html`
		<sts-dialog
			${ref(this.#temporaryVideoPreviewRef)}
			skipWrapper
			.trigger=${ this.trigger ?? [] }
			.template=${[this, html`
				<sts-dialog-base
					class="video-style-preview"
					@close=${() => {
						this.#temporaryVideoPreviewRef.value?.close();
					}}
					@keydown=${this.stopTextInputBubbling}
					@keyup=${this.stopTextInputBubbling}
				>
					<sts-dialog-header icon="films">
						Video Style Preview
					</sts-dialog-header>

					<style>${unsafeCSS(styles)}</style>

					<div class="video-style-preview__side-by-side">
						<div class="video-style-preview__panel">
							<h2 class="video-style-preview__heading">
								Raw Preview
							</h2>
							<div
								class="
									video-style-preview__image
									video-style-preview__image--source"
								style=${styleMap({
									"background-image": this.sourceImageUrl
										? `url(${this.sourceImageUrl})`
										: undefined,
								})}
								src=${ifDefined(this.sourceImageUrl)}
							>
								${!this.sourceImageUrl ? html`
									<h2 class="video-style-preview__heading">
										Loading...
									</h2>
								` : nothing}
							</div>
						</div>
						<div class="video-style-preview__panel">
							<h2 class="video-style-preview__heading">
								Styled Preview
							</h2>
							<div
								class="
									video-style-preview__image
									video-style-preview__image--result"
								style=${styleMap({
									"background-image": this.resultImageUrl
										? `url(${this.resultImageUrl})`
										: undefined,
								})}
							>
								${!this.resultImageUrl ? html`
									<h2 class="video-style-preview__heading">
										Loading...
									</h2>
								` : nothing}
							</div>
						</div>
					</div>

					<div class="
							video-style-preview__form-field
							video-style-preview__form-field--base-style"
					>
						<label
							class="video-style-preview__label"
							for="video-style-preview-base-style"
						>
							Select Base Style
						</label>
						<sts-bubble-select
							id="video-style-preview-base-style"
							.options=${STYLE_OPTIONS}
							.value=${bind(this, "selectedStyle")}
						></sts-bubble-select>
					</div>

					<div class="video-style-preview__prompts">
						<div class="video-style-preview__form-field">
							<label
								class="video-style-preview__label"
								for="video-style-preview-prompt"
							>
								Enter a Prompt
							</label>
							<textarea
								id="video-style-preview-prompt"
								class="video-style-preview__input"
								name="prompt"
								cols="60"
								rows="8"
								.value=${this.prompt}
								@input=${(event: InputEvent) => {
									this.prompt = (event.target as HTMLTextAreaElement).value;
								}}
							></textarea>
						</div>
						<div class="video-style-preview__form-field">
							<label
								class="video-style-preview__label"
								for="video-style-preview-neg-prompt"
							>
								Negative Prompt
							</label>
							<textarea
								id="video-style-preview-neg-prompt"
								class="video-style-preview__input"
								name="neg-prompt"
								cols="60"
								rows="8"
								placeholder=${"Type here to filter out the things you don't "
									+ "want in your scene..."}
								.value=${this.negPrompt}
								@input=${(event: InputEvent) => {
									this.negPrompt = (event.target as HTMLTextAreaElement).value;
								}}
							></textarea>
						</div>
					</div>

					<sts-dialog-footer>
						<sts-button
							primary
							icon="rotate"
							@click=${this.requestScreen}
						>
							Update
						</sts-button>
					</sts-dialog-footer>
				</sts-dialog-base>
			`] as const}
		></sts-dialog>
	`
}