import * as fs from 'fs';
import pluginVue from '@vitejs/plugin-vue';
import { defineConfig } from 'vite';

import locales from '../../locales';
import meta from '../../package.json';
import pluginJson5 from './vite.json5';
import viteCompression from 'vite-plugin-compression';
import ConditionalCompile from "vite-plugin-conditional-compiler";
import tsconfigPaths from 'vite-tsconfig-paths'

const extensions = ['.ts', '.tsx', '.js', '.jsx', '.mjs', '.json', '.json5', '.svg', '.sass', '.scss', '.css', '.vue'];

export default defineConfig(({ command, mode }) => {
	fs.mkdirSync(`${__dirname}/../../built`, { recursive: true });
	fs.writeFileSync(`${__dirname}/../../built/meta.json`, JSON.stringify({ version: meta.version }), 'utf-8');

	return {
		base: '/assets/',

		plugins: [
			ConditionalCompile(),
			pluginVue({
				reactivityTransform: true,
			}),
			pluginJson5(),
			tsconfigPaths(),
			viteCompression({
				algorithm: 'brotliCompress'
			}),
		],

		resolve: {
			extensions,
			alias: {
				'@/': `${__dirname}/src/`,
				'/client-assets/': `${__dirname}/assets/`,
				'/static-assets/': `${__dirname}/../backend/assets/`,
			},
		},

		define: {
			_VERSION_: JSON.stringify(meta.version),
			_LANGS_: JSON.stringify(Object.entries(locales).map(([k, v]) => [k, v._lang_])),
			_ENV_: JSON.stringify(process.env.NODE_ENV),
			_DEV_: process.env.NODE_ENV !== 'production',
			_PERF_PREFIX_: JSON.stringify('Misskey:'),
			_DATA_TRANSFER_DRIVE_FILE_: JSON.stringify('mk_drive_file'),
			_DATA_TRANSFER_DRIVE_FOLDER_: JSON.stringify('mk_drive_folder'),
			_DATA_TRANSFER_DECK_COLUMN_: JSON.stringify('mk_deck_column'),
			__VUE_OPTIONS_API__: true,
			__VUE_PROD_DEVTOOLS__: false,
		},

		build: {
			target: [
				'chrome87',
				'firefox78',
				'safari14',
				'es2017',
			],
			manifest: 'manifest.json',
			rollupOptions: {
				input: {
					index: 'index.html',
					app: './src/init.ts',
				},
				output: {
					manualChunks: {
						vue: ['vue'],
					},
				},
			},
			cssCodeSplit: true,
			assetsInlineLimit: 0,
			outDir: `${__dirname}/../../built/_client_dist_`,
			assetsDir: '.',
			emptyOutDir: false,
			sourcemap: process.env.NODE_ENV === 'development',
			reportCompressedSize: false,
		},
		optimizeDeps: {
			auto: true,
		},
	};
});