import * as fse from "fs-extra";
import { resolve } from "path";
import { ListItem } from '../types/index';
import { selectWorkspaceFolder } from "../utils/selectWorkspaceFolder";
import { filterInvalidPath } from "../utils/filterInvalidPath";
import { Uri, ViewColumn, window } from "vscode";

export async function openQuestion(ele: ListItem): Promise<void> {
	const { name, type = 'md', detail, question_id } = ele;
	const workspaceFolder: string = await selectWorkspaceFolder();
	if (!workspaceFolder) {
		return;
	}
	const codeTemplate = getCodeTemplate(type, detail);
	const finalPath = await showProblem(
		resolve(
			workspaceFolder,
			question_id + "." + filterInvalidPath(name) + "." + type
		),
		codeTemplate || ""
	);
	await window.showTextDocument(Uri.file(finalPath), {
		preview: false,
		viewColumn: ViewColumn.One,
	});
	return;
}

async function showProblem(filePath: string, codeTemplate: string) {
	if (!(await fse.pathExists(filePath))) {
		await fse.createFile(filePath);
		await fse.writeFile(filePath, codeTemplate);
	}
	return filePath;
}

function getCodeTemplate(type: "md" | "js", detail: string) {
	if (type === "md") {
		return `# 问题: ${detail}

*[攀峰]: start

*[攀峰]: end
`;
	} else {
		return `// 问题: ${detail}
// @interview start

// @interview end
`;
	}
}