/**
 * @type { ServiceWorkerGlobalScope } 提供ServiceWorker的代码提示
 */
// @ts-ignore
var self = globalThis;
// 以副作用导入typescript，以保证require也可以同步使用
import './game/typescript.js';
/**
 * @type { import('typescript') }
 */
var ts = globalThis.ts;
// sfc以正常的esmodule使用
import * as sfc from './game/compiler-sfc.esm-browser.js';
if (typeof ts != 'undefined') {
	console.log(`ts loaded`, ts.version);
} else {
	console.error(`ts undefined`);
}

if (typeof sfc != 'undefined') {
	console.log(`sfc loaded`, sfc.version);
	sfc.registerTS(() => ts);
} else {
	console.error(`sfc undefined`);
}

console.log('serviceWorker version 2.3');

self.addEventListener("install", (event) => {
	// The promise that skipWaiting() returns can be safely ignored.
	self.skipWaiting();
});

self.addEventListener("activate", (event) => {
	// 当一个 service worker 被初始注册时，页面在下次加载之前不会使用它。 claim() 方法会立即控制这些页面
	event.waitUntil(self.clients.claim());
});

self.addEventListener('message', event => {
	console.log(event.data);
});

/**
 * 将vue编译的结果放在这里，调用的时候直接返回就好了
 */
const vueFileMap = new Map();

self.addEventListener('fetch', event => {
	const request = event.request;
	if (typeof request.url != 'string') return console.log(request);
	if (vueFileMap.has(request.url)) {
		const rep = new Response(new Blob([vueFileMap.get(request.url)], { type: "text/javascript" }), {
			status: 200,
			statusText: "OK",
			headers: new Headers({
				"Content-Type": "text/javascript"
			}),
		});
		event.respondWith(rep);
		return;
	}
	if (!['.ts', '.json', '.vue', 'css'].some(ext => request.url.endsWith(ext)) && !request.url.replace(location.origin, '').startsWith('/noname-builtinModules/')) return;
	if (request.url.endsWith('.d.ts')) return;
	if (request.url.endsWith('.json') || request.url.endsWith('css')) {
		if (!event.request.headers.get('origin')) return;
	}
	if (request.url.replace(location.origin, '').startsWith('/noname-builtinModules/')) {
		const moduleName = request.url.replace(location.origin + '/noname-builtinModules/', '');
		console.log('正在编译', moduleName);
		let js = `const module = require('${ moduleName }');\nexport default module;`;
		const rep = new Response(new Blob([js], { type: "text/javascript" }), {
			status: 200,
			statusText: "OK",
			headers: new Headers({
				"Content-Type": "text/javascript"
			}),
		});
		console.log(moduleName, '编译成功');
		event.respondWith(Promise.resolve(rep));
	} else {
		// 请求原文件
		const res = fetch(request.url, {
			method: request.method,
			mode: "no-cors",
			headers: new Headers({
				"Content-Type": "text/plain"
			}),
		});
		// 修改请求结果
		event.respondWith(
			res.then(res => {
				if (res.status != 200) return res;
				console.log('正在编译', request.url);
				return res.text().then(text => {
					let js = '';
					if (request.url.endsWith('.json')) {
						js = `export default ${ text }`;
					} else if (request.url.endsWith('.ts')) {
						js = ts.transpile(text, {
							module: ts.ModuleKind.ES2015,
							//@todo: ES2019 -> ES2020
							target: ts.ScriptTarget.ES2019,
							inlineSourceMap: true,
							resolveJsonModule: true,
							esModuleInterop: true,
						}, request.url);
					} else if (request.url.endsWith('.vue')) {
						const id = Date.now().toString();
						const scopeId = `data-v-${ id }`;
						// 后续处理sourceMap合并
						const { descriptor } = sfc.parse(text, { filename: request.url, sourceMap: true });
						// console.log({ descriptor });
						const hasScoped = descriptor.styles.some(s => s.scoped);
						// 编译 script，因为可能有 script setup，还要进行 css 变量注入
						const script = sfc.compileScript(descriptor, {
							id: scopeId,
							inlineTemplate: true,
							templateOptions: {
								scoped: hasScoped,
								compilerOptions: {
									scopeId: hasScoped ? scopeId : undefined,
								}
							},
						});
						// 用于存放代码，最后 join('\n') 合并成一份完整代码
						const codeList = [];

						// 保存url并且拼接参数
						const url = new URL(request.url);
						const scriptSearchParams = new URLSearchParams(url.search.slice(1));
						scriptSearchParams.append('type', 'script');

						const templateSearchParams = new URLSearchParams(url.search.slice(1));
						templateSearchParams.append('type', 'template');

						vueFileMap.set(
							url.origin + url.pathname + '?' + scriptSearchParams.toString(),
							// 重写 default
							sfc.rewriteDefault(script.attrs && script.attrs.lang == 'ts' ? ts.transpile(script.content, {
								module: ts.ModuleKind.ES2015,
								//@todo: ES2019 -> ES2020
								target: ts.ScriptTarget.ES2019,
								inlineSourceMap: true,
								resolveJsonModule: true,
								esModuleInterop: true,
							}, url.origin + url.pathname + '?' + scriptSearchParams.toString()) : script.content, "__sfc_main__")
								.replace(`const __sfc_main__`, `export const __sfc_main__`)
								// import vue重新指向
								.replaceAll(`from "vue"`, `from "/game/vue.esm-browser.js"`)
								.replaceAll(`from 'vue'`, `from '/game/vue.esm-browser.js'`)
						);

						codeList.push(`import { __sfc_main__ } from '${ url.origin + url.pathname + '?' + scriptSearchParams.toString() }'`);
						codeList.push(`__sfc_main__.__scopeId = '${ scopeId }'`);

						// 编译模板，转换成 render 函数
						const template = sfc.compileTemplate({
							source: descriptor.template ? descriptor.template.content : '',
							filename: request.url, // 用于错误提示
							id: scopeId,
							scoped: hasScoped,
							compilerOptions: {
								scopeId: hasScoped ? scopeId : undefined,
							}
						});

						vueFileMap.set(
							url.origin + url.pathname + '?' + templateSearchParams.toString(),
							template.code
							// .replace(`function render(_ctx, _cache) {`, str => str + 'console.log(_ctx);')
							.replaceAll(`from "vue"`, `from "/game/vue.esm-browser.js"`)
							.replaceAll(`from 'vue'`, `from '/game/vue.esm-browser.js'`)
						);
						
						codeList.push(`import { render } from '${ url.origin + url.pathname + '?' + templateSearchParams.toString() }'`);
						codeList.push(`__sfc_main__.render = render;`);
						codeList.push(`export default __sfc_main__;`);
						// 一个 Vue 文件，可能有多个 style 标签
						let styleIndex = 0;
						for (const styleBlock of descriptor.styles) {
							const styleCode = sfc.compileStyle({
								source: styleBlock.content,
								id,
								filename: request.url,
								scoped: styleBlock.scoped,
							});
							const varName = `el${ styleIndex }`;
							const styleDOM = `let ${ varName } = document.createElement('style');\n${ varName }.innerHTML =  \`${ styleCode.code }\`;\ndocument.body.append(${ varName });`;
							codeList.push(styleDOM);
						}
						js = codeList.join('\n');
						// console.log(js);
					} else if (request.url.endsWith('css')) {
						const id = Date.now().toString();
						const scopeId = `data-v-${ id }`;
						js = `const style = document.createElement('style');
						style.setAttribute('type', 'text/css');
						style.setAttribute('data-vue-dev-id', \`${ scopeId }\`);
						style.textContent = ${ JSON.stringify(text) };
						document.head.appendChild(style);`;
					}
					const rep = new Response(new Blob([js], { type: "text/javascript" }), {
						status: 200,
						statusText: "OK",
						headers: new Headers({
							"Content-Type": "text/javascript"
						}),
					});
					console.log(request.url, '编译成功');
					return rep;
				})
			})
			.catch(e => {
				console.error(request.url, '编译失败: ', e);
				throw e;
			})
		);
	}
});