const fs = require('fs');
const fse = require('fs-extra');
const globby = require('globby');
const chalk = require('chalk');
const path = require('path');
const assert = require('assert');

const argv = require('yargs').argv;
const projectDir = __dirname;

/**
 * ------------------------------------------------------------------------
 * Usage:
 *
 * ```shell
 * node build.js --env asf # build all for asf
 * node build.js --env echartsjs # build all for echartsjs.
 * node build.js --env localsite # build all for localsite.
 * node build.js --env dev # the same as "debug", dev the content of examples.
 * # Check `./config` to see the available env
 * ```
 * ------------------------------------------------------------------------
 */

function initEnv() {
    let envType = argv.env;
    let isDev = argv.dev != null || argv.debug != null || envType === 'debug' || envType === 'dev';

    if (isDev) {
        console.warn('====================================================================');
        console.warn('THIS IS IN DEV MODE');
        console.warn('!!! Please input your local host in `config/env.dev.js` firstly !!!');
        console.warn('====================================================================');
        envType = 'dev';
    }

    if (!envType) {
        throw new Error('--env MUST be specified');
    }

    let config = require('../config/env.' + envType);

    if (isDev) {
        console.warn('====================================================================');
        console.warn('Please visit the website: ');
        console.warn(config.host);
        console.warn('====================================================================');
    }

    assert(path.isAbsolute(config.releaseDestDir));

    config.envType = envType;

    return config;
}

async function copyResourcesToDest(config) {
    let basePath = path.resolve(projectDir, '../public');
    const filePaths = await globby([
        '**/*',
        // Use jade in echarts-www
        '!zh/*',
        '!en/*'
    ], {
        cwd: basePath
    });

    console.log();

    for (let filePath of filePaths) {
        fse.ensureDirSync(
            path.resolve(config.releaseDestDir, path.dirname(filePath))
        );
        let destPath = path.resolve(config.releaseDestDir, filePath);
        fs.copyFileSync(
            path.resolve(basePath, filePath),
            destPath
        );

        process.stdout.clearLine();
        process.stdout.cursorTo(0);
        process.stdout.write(chalk.green(`resource copied to: ${destPath}`));
    }

    console.log('\ncopyResourcesToDest done.');
}

async function run() {
    let config = initEnv();
    await copyResourcesToDest(config);

    console.log('All done.');
}

run();