import svelte from 'rollup-plugin-svelte';
import resolve from 'rollup-plugin-node-resolve';
import commonjs from 'rollup-plugin-commonjs';
import livereload from 'rollup-plugin-livereload';
import { terser } from 'rollup-plugin-terser';
import json from 'rollup-plugin-json';

const production = !process.env.ROLLUP_WATCH;

const lodash_fp_exports = [
    "find", "isUndefined", "split", 
    "last", "union", "reduce", "isObject",
    "cloneDeep", "some", "isArray", "map",
    "filter", "keys", "isFunction", "isEmpty",
    "countBy", "join", "includes", "flatten",
    "constant", "first", "intersection", "take",
    "has", "mapValues", "isString", "isBoolean",
    "isNull", "isNumber", "isObjectLike", "isDate",
    "clone", "values", "keyBy", "isNaN",
    "isInteger", "toNumber"];

const lodash_exports = [
    "flow", "head",  
    "tail", "findIndex", "startsWith", 
    "dropRight", "takeRight", 
    "trim", "split", "replace", 
    "merge", "assign"];

const coreExternal = [
	"lodash", "lodash/fp", "date-fns",
	"lunr", "safe-buffer", "shortid",
	"@nx-js/compiler-util"
];

export default {
	input: 'src/Test/testMain.js',
	output: {
		sourcemap: true,
		format: 'iife',
		name: 'app',
		file: 'public/bundle.js'
	},
	plugins: [
		svelte({
			// enable run-time checks when not in production
			dev: !production,
			// we'll extract any component CSS out into
			// a separate file — better for performance
			css: css => {
				css.write('public/bundle.css');
			},
			
			hydratable:true
		}),

		// If you have external dependencies installed from
		// npm, you'll most likely need these plugins. In
		// some cases you'll need additional configuration —
		// consult the documentation for details:
		// https://github.com/rollup/rollup-plugin-commonjs
		resolve({
			browser: true,
			dedupe: importee => {
				return importee === 'svelte' 
					   || importee.startsWith('svelte/')
					   || coreExternal.includes(importee);
			}
		}),
		commonjs({
			namedExports: {
				"lodash/fp": lodash_fp_exports,
				"lodash":lodash_exports,
				"shortid": ["generate"]
			}
		}),
		json(),

		// Watch the `public` directory and refresh the
		// browser on changes when not in production
		!production && livereload('public'),

		// If we're building for production (npm run build
		// instead of npm run dev), minify
		production && terser()
	],
	watch: {
		clearScreen: false
	}
};