import path = require('path');
import * as vscode from 'vscode';
import { Uri, window, ExtensionContext} from "vscode";
import { getNonce } from "./webviewUtils";

class JavaClassDocument implements vscode.CustomDocument {
	constructor(uri: Uri) { this.uri = uri; }
	uri: Uri;
	dispose(): void { }
}

export class JavaClassEditorProvider implements vscode.CustomReadonlyEditorProvider {

	private context: ExtensionContext;

	openCustomDocument(uri: Uri, openContext: vscode.CustomDocumentOpenContext, token: vscode.CancellationToken): JavaClassDocument {
		return new JavaClassDocument(uri);
	}

	constructor (context: ExtensionContext) {
		this.context = context;
	}

	public static readonly viewType = 'decompiled.javaClass';

	async resolveCustomEditor(document: vscode.CustomDocument, webviewPanel: vscode.WebviewPanel, token: vscode.CancellationToken): Promise {
		const nonce: string = getNonce();
		webviewPanel.webview.options = {
			enableScripts: true,
			localResourceRoots: [Uri.joinPath(Uri.parse(this.context.extensionPath), 'webview-resources')]
		};
		const classUri = Uri.parse((document.uri.toString()).replace(/^file/, "class"));
		const styleUri = Uri.file(
			path.join(this.context.extensionPath, 'webview-resources', 'button.css')
		);
		const style: string = ``;
		webviewPanel.webview.html = `


			${style}


		`;
		webviewPanel.webview.onDidReceiveMessage(message => {
			switch (message.command) {
				case 'decompiled':
					webviewPanel.dispose();
					window.showTextDocument(classUri, { preview: false });
					return;
			}
		}, undefined, this.context.subscriptions);
	}
}