import { WorkspaceLeaf, Plugin } from "obsidian";
import { MainView, VIEW_TYPE_MAIN } from "Views/MainView";
import { RegisterDependencies, RegisterPlugin } from "Services/ServiceRegistration";
import { VaultkeeperAISettingTab } from "Views/VaultkeeperAISettingTab";
import { DiffView, VIEW_TYPE_DIFF } from "Views/DiffView";
import { PlanApprovalView, VIEW_TYPE_PLAN_APPROVAL } from "Views/PlanApprovalView";
import { Services } from "Services/Services";
import { DeregisterAllServices, Resolve } from "Services/DependencyService";
import type { VaultService } from "Services/VaultService";
import { Path } from "Enums/Path";
import { Copy } from "Enums/Copy";
import type { SettingsService } from "Services/SettingsService";
import type { Diff2HtmlUIConfig } from "diff2html/lib/ui/js/diff2html-ui";
import type { ExecutionPlan } from "Types/ExecutionPlan";

import "katex/dist/katex.min.css";
import 'highlight.js/styles/monokai.min.css';
import 'diff2html/bundles/css/diff2html.min.css';
import type { AssetsService } from "Services/AssetsService";
import type { Artifact } from "Conversations/Artifact";
import { ArtifactView, VIEW_TYPE_ARTIFACT } from "Views/ArtifactView";

export default class VaultkeeperAIPlugin extends Plugin {
	
	public async onload() {
		await RegisterPlugin(this);
		RegisterDependencies();

		this.registerView(
			VIEW_TYPE_MAIN,
			(leaf) => new MainView(leaf)
		);
		this.registerView(
			VIEW_TYPE_DIFF,
			(leaf) => new DiffView(leaf)
		);
		this.registerView(
			VIEW_TYPE_ARTIFACT,
			(leaf) => new ArtifactView(leaf)
		);
		this.registerView(
			VIEW_TYPE_PLAN_APPROVAL,
			(leaf) => new PlanApprovalView(leaf)
		);

		this.addCommand({
			id: "open",
			name: "Open",
			callback: async () => {
				await this.activateMainView();
			}
		});

		const assetsService = Resolve<AssetsService>(Services.AssetsService);
		this.addRibbonIcon(assetsService.pluginIcon, "Vaultkeeper AI", async () => {
			await this.activateMainView();
		});

		this.addSettingTab(new VaultkeeperAISettingTab());

		this.app.workspace.onLayoutReady(async () => {
			this.closeStaleViews();
			await this.setup();
		});
	}

	public onunload() {
		DeregisterAllServices();
	}

	public async activateMainView() {
		const { workspace } = this.app;

		let leaf: WorkspaceLeaf | null;
		const leaves = workspace.getLeavesOfType(VIEW_TYPE_MAIN);

		if (leaves.length > 0) {
			leaf = leaves[0];
		} else {
			leaf = workspace.getRightLeaf(false);
			await leaf?.setViewState({ type: VIEW_TYPE_MAIN, active: true });
		}

		if (leaf != null) {
			await workspace.revealLeaf(leaf);
		}
	}

	public async activateDiffView(diffString: string, config: Diff2HtmlUIConfig) {
		const { workspace } = this.app;

		const leaves = workspace.getLeavesOfType(VIEW_TYPE_DIFF);
		const leaf = leaves.length > 0 ? leaves[0] : workspace.getLeaf("tab");

		await leaf?.setViewState({
			type: VIEW_TYPE_DIFF,
			active: true,
			state: { diffString, config }
		});

		if (leaf != null) {
			await workspace.revealLeaf(leaf);
		}
	}

	public async activatePlanApprovalView(plan: ExecutionPlan) {
		const { workspace } = this.app;

		const leaves = workspace.getLeavesOfType(VIEW_TYPE_PLAN_APPROVAL);
		const leaf = leaves.length > 0 ? leaves[0] : workspace.getLeaf("tab");

		await leaf?.setViewState({
			type: VIEW_TYPE_PLAN_APPROVAL,
			active: true,
			state: { plan }
		});

		if (leaf != null) {
			await workspace.revealLeaf(leaf);
		}
	}

	public async activateArtifactView(artifact: Artifact, diffString: string, config: Diff2HtmlUIConfig) {
		const { workspace } = this.app;

		const leaves = workspace.getLeavesOfType(VIEW_TYPE_ARTIFACT);
		const leaf = leaves.length > 0 ? leaves[0] : workspace.getLeaf("tab");

		await leaf?.setViewState({
			type: VIEW_TYPE_ARTIFACT,
			active: true,
			state: { artifact, diffString, config }
		});

		if (leaf != null) {
			await workspace.revealLeaf(leaf);
		}
	}

	private closeStaleViews() {
		const { workspace } = this.app;

		workspace.getLeavesOfType(VIEW_TYPE_DIFF).forEach(leaf => leaf.detach());
		workspace.getLeavesOfType(VIEW_TYPE_PLAN_APPROVAL).forEach(leaf => leaf.detach());
	}

	// create example user instruction (on first launch only)
	private async setup() {
		const settingsService = Resolve<SettingsService>(Services.SettingsService);
		if (!settingsService.settings.firstTimeStart) {
			return;
		}

		await settingsService.updateSettings(settings => {
			settings.firstTimeStart = false;
		});

		const vaultService: VaultService = Resolve<VaultService>(Services.VaultService);
		await vaultService.create(Path.ExampleUserInstructions, Copy.EXAMPLE_USER_INSTRUCTION, true, false);
	}
}