const path = require('path');
const babel = require('rollup-plugin-babel');
const commonjs = require('rollup-plugin-commonjs');
const nodeResolve = require('rollup-plugin-node-resolve');
const postcss = require('rollup-plugin-postcss');
const { eslint } = require('rollup-plugin-eslint');
const autoprefixer = require('autoprefixer');
const cssnano = require('cssnano');
const replace = require('rollup-plugin-replace');
const svgo = require('rollup-plugin-svgo');
const { uglify } = require('rollup-plugin-uglify');
const { version, homepage, name } = require('./package.json');

const isProd = process.env.NODE_ENV === 'production';

const banner =
    '/*!\n' +
    ` * ${name}.js v${version}\n` +
    ` * Github: ${homepage}\n` +
    ` * (c) 2017-${new Date().getFullYear()} Harvey Zack\n` +
    ' * Released under the MIT License.\n' +
    ' */\n';

export default {
    input: 'src/index.js',
    output: {
        name,
        file: isProd ? `dist/${name}.js` : path.join(process.cwd(), '../../', `docs/uncompiled/${name}.js`),
        format: 'umd',
        exports: 'named',
    },
    plugins: [
        eslint({
            exclude: ['node_modules/**', 'src/**/*.scss', 'src/**/*.svg'],
        }),
        postcss({
            plugins: [autoprefixer, cssnano],
            extract: isProd ? `dist/${name}.css` : path.join(process.cwd(), '../../', `docs/uncompiled/${name}.css`),
        }),
        nodeResolve(),
        commonjs(),
        babel({
            runtimeHelpers: true,
            exclude: 'node_modules/**',
            presets: [['@babel/env', { modules: false }]],
            plugins: ['@babel/plugin-external-helpers', '@babel/plugin-transform-runtime'],
        }),
        svgo({
            raw: true,
        }),
        replace({
            exclude: 'node_modules/**',
            __ENV__: JSON.stringify(process.env.NODE_ENV || 'development'),
            __VERSION__: version,
        }),
        isProd &&
            uglify({
                output: {
                    preamble: banner,
                },
            }),
    ],
};