/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import * as vscode from 'vscode';
import * as path from 'path';

import { MDDocumentContentProvider } from './previewContentProvider';
import { MarkdownEngine } from './markdownEngine';

const resolveExtensionResources = (extension: vscode.Extension<any>, stylePath: string): vscode.Uri => {
	const resource = vscode.Uri.parse(stylePath);
	if (resource.scheme) {
		return resource;
	}
	return vscode.Uri.file(path.join(extension.extensionPath, stylePath));
};


export function loadMarkdownExtensions(
	contentProvider: MDDocumentContentProvider,
	engine: MarkdownEngine
) {
	for (const extension of vscode.extensions.all) {
		const contributes = extension.packageJSON && extension.packageJSON.contributes;
		if (!contributes) {
			continue;
		}

		const styles = contributes['markdown.previewStyles'];
		if (styles && Array.isArray(styles)) {
			for (const style of styles) {
				try {
					contentProvider.addStyle(resolveExtensionResources(extension, style));
				} catch (e) {
					// noop
				}
			}
		}

		const scripts = contributes['markdown.previewScripts'];
		if (scripts && Array.isArray(scripts)) {
			for (const script of scripts) {
				try {
					contentProvider.addScript(resolveExtensionResources(extension, script));
				} catch (e) {
					// noop
				}
			}
		}

		if (contributes['markdown.markdownItPlugins']) {
			extension.activate().then(() => {
				if (extension.exports && extension.exports.extendMarkdownIt) {
					engine.addPlugin((md: any) => extension.exports.extendMarkdownIt(md));
				}
			});
		}
	}
}