import path from 'path';
import del from 'rollup-plugin-delete';
import copy from 'rollup-plugin-copy';
import { fileURLToPath } from 'url';
import ignore from "rollup-plugin-ignore"
import replace from '@rollup/plugin-replace';
import resolve from '@rollup/plugin-node-resolve';
import terser from '@rollup/plugin-terser';
import commonjsImport from '@rollup/plugin-commonjs';
import summary from 'rollup-plugin-summary';
import { generateSW } from 'rollup-plugin-workbox';
import jsonImport from '@rollup/plugin-json';
import litcssImport from 'rollup-plugin-lit-css';
import { minify as minifyHtml } from 'html-minifier';
import minifyHtmlLiterals from "rollup-plugin-html-literals";

const __filename        = fileURLToPath(import.meta.url);
const __dirname         = path.dirname(__filename);

const appName       = 'Öffisearch';
const appRepoUrl    = 'https://git.zaphyra.eu/oeffisearch';
const appImprintUrl = 'https://katja.wtf/imprint.html';

const isDevServer   = process.env.ROLLUP_WATCH;
const gitVersion    = process.env.GIT_VERSION;
const gitCommit     = process.env.GIT_COMMIT;
const gitCommitDate = process.env.GIT_COMMITDATE

export default {
	input: 'src/main.js',
	output: {
		dir: 'dist',
		sourcemap: !isDevServer ? false : true,
	},
	preserveEntrySignatures: false,
	treeshake: isDevServer ? false : 'recommended',
	onwarn: warning => {
		if (!warning.ids.some(e => e.includes('node_modules'))) console.error(`(!) ${warning.message}`);
	},
	plugins: [
		del({ targets: [ 'dist/*' ] }),
		copy({
			targets: [
				{ src: 'src/assets/favicon.png',   dest: 'dist' },
				{ src: 'src/assets/favicon.svg',   dest: 'dist' },
				{ src: 'src/assets/manifest.json', dest: 'dist',
				  transform: contents => JSON.stringify(JSON.parse(
				  	contents.toString().replaceAll('{{APP_NAME}}', appName)
				  ))
				},
				{ src: 'src/assets/index.html',    dest: 'dist',
				  transform: contents => minifyHtml(contents.toString().replaceAll('{{APP_NAME}}', appName), {
				  	collapseWhitespace: true,
				  	removeAttributeQuotes: true,
				    minifyCSS: true
				  })
				},
			]
		}),
		// Minify HTML template literals
		!isDevServer && minifyHtmlLiterals(),
		// stub some modules
		ignore([ 'http', 'url', 'tls', 'stream', 'assert', 'https-proxy-agent', 'db-hafas-stations', 'events' ]),
		replace({
			preventAssignment: true,
			delimiters: ['', ''],
			values: {
				'import {createRequire} from \'module\';': '',
	 			'const require = createRequire(import.meta.url);': '',
				'process.env.DEBUG':         JSON.stringify(),
				'process.env.HTTPS_PROXY':   JSON.stringify(),
				'process.env.HTTP_PROXY':    JSON.stringify(),
				'process.env.LOCAL_ADDRESS': JSON.stringify(),
			},
		}),
		replace({
			preventAssignment: true,
			values: {
				'node:buffer':    'buffer',
				'cross-fetch':    path.resolve(__dirname, 'src/shim/cross-fetch.js'),
				'isDevServer':    isDevServer,
				'APP_NAME':       JSON.stringify(appName),
				'APP_REPOURL':    JSON.stringify(appRepoUrl),
				'APP_IMPRINTURL': JSON.stringify(appImprintUrl),
				'APP_VERSION':    JSON.stringify(gitVersion    ? gitVersion    : `0.0.0-${isDevServer ? 'dev' : 'prod'}`),
				'APP_COMMIT':     JSON.stringify(gitCommit     ? gitCommit     : 'unknown'),
				'APP_COMMITDATE': JSON.stringify(gitCommitDate ? gitCommitDate : (new Date).toString()),
			},
		}),
		// Resolve bare module specifiers to relative paths
		resolve({
			browser: true,
			preferBuiltins: false,
			modulePaths: [ path.resolve(__dirname, 'src/shim') ],
		}),
		// css import support for lit
		litcssImport({ cssnano: true, }),
		// commonjs imports
		commonjsImport({ transformMixedEsModules: true }),
		// json import support
		jsonImport(),
		// Minify JS
		!isDevServer && terser({
			ecma: 2021,
			module: true,
			warnings: true,
		}),
		// generate service-worker
		!isDevServer && generateSW({
		  swDest: 'dist/sw.js',
		  globDirectory: 'dist/',
		  globPatterns: [ '*' ],
		  clientsClaim: true,
		  skipWaiting: true,
		  sourcemap: false
		}),
		// Print bundle summary
		summary({
			showMinifiedSize: isDevServer ?	true : false,
			showGzippedSize: true,
			showBrotliSize: true,
		}),
 	]
};