#!/usr/bin/env node

/* eslint-disable consistent-return */

const map = {};
require('source-map-support').install({
    handleUncaughtExceptions: false,
    environment: 'node',
    retrieveSourceMap(file) {
        if (map[file]) {
            return {
                url: file,
                map: map[file],
            };
        }
        return null;
    },
});
const os = require('os');
const path = require('path');
const vm = require('vm');
const fs = require('fs-extra');
const argv = require('cac')().parse();
const child = require('child_process');
const esbuild = require('esbuild');
const { default: hook } = require('require-resolve-hook');
const { bypass } = hook(/^hydrooj/, (id) => bypass(() => require.resolve(id)));

const exec = (...args) => {
    console.log('Executing: ', args[0], args[1].join(' '));
    const res = child.spawnSync(...args);
    if (res.error) throw res.error;
    if (res.status) throw new Error(`Error: Exited with code ${res.status}`);
    return res;
};

if (!process.env.NODE_APP_INSTANCE) process.env.NODE_APP_INSTANCE = '0';
const major = +process.version.split('.')[0].split('v')[1];
const minor = +process.version.split('.')[1];

let transformTimeUsage = 0;
let transformCount = 0;
let displayTimeout;
function transform(filename) {
    const start = Date.now();
    const code = fs.readFileSync(filename, 'utf-8');
    const result = esbuild.transformSync(code, {
        sourcefile: filename,
        sourcemap: 'both',
        format: 'cjs',
        loader: 'tsx',
        target: `node${major}.${minor}`,
        jsx: 'transform',
    });
    if (result.warnings.length) console.warn(result.warnings);
    transformTimeUsage += Date.now() - start;
    transformCount++;
    if (displayTimeout) clearTimeout(displayTimeout);
    displayTimeout = setTimeout(() => console.log(`Transformed ${transformCount} files. (${transformTimeUsage}ms)`), 1000);
    map[filename] = result.map;
    return result.code;
}
const ESM = ['p-queue', 'p-timeout'];
const _script = new vm.Script('"Hydro"', { produceCachedData: true });
const bytecode = (_script.createCachedData && _script.createCachedData.call)
    ? _script.createCachedData()
    : _script.cachedData;
require.extensions['.js'] = function loader(module, filename) {
    if (ESM.filter((i) => filename.includes(i)).length || major < 14) {
        return module._compile(transform(filename), filename);
    }
    const content = fs.readFileSync(filename, 'utf-8');
    return module._compile(content, filename);
};
require.extensions['.ts'] = require.extensions['.tsx'] = function loader(module, filename) {
    return module._compile(transform(filename), filename);
};
require.extensions['.jsc'] = function loader(module, filename) {
    const buf = fs.readFileSync(filename);
    bytecode.slice(12, 16).copy(buf, 12);
    if (![12, 13, 14, 15, 16, 17].filter((i) => process.version.startsWith(`v${i}`)).length) {
        bytecode.slice(16, 20).copy(buf, 16);
    }
    // eslint-disable-next-line no-return-assign
    const length = buf.slice(8, 12).reduce((sum, number, power) => sum += number * (256 ** power), 0);
    let dummyCode = '';
    if (length > 1) dummyCode = `"${'\u200b'.repeat(length - 2)}"`;
    const script = new vm.Script(dummyCode, {
        filename,
        lineOffset: 0,
        displayErrors: true,
        cachedData: buf,
    });
    if (script.cachedDataRejected) throw new Error(`cacheDataRejected on ${filename}`);
    const compiledWrapper = script.runInThisContext({
        filename,
        lineOffset: 0,
        columnOffset: 0,
        displayErrors: true,
    });
    const dirname = path.dirname(filename);
    const args = [module.exports, require, module, filename, dirname, process, global];
    return compiledWrapper.apply(module.exports, args);
};

function buildUrl(opts) {
    let mongourl = `${opts.protocol || 'mongodb'}://`;
    if (opts.username) mongourl += `${opts.username}:${opts.password}@`;
    mongourl += `${opts.host}:${opts.port}/${opts.name}`;
    if (opts.url) mongourl = opts.url;
    return mongourl;
}

const hydroPath = path.resolve(os.homedir(), '.hydro');
fs.ensureDirSync(hydroPath);
const addonPath = path.resolve(hydroPath, 'addon.json');
if (!fs.existsSync(addonPath)) fs.writeFileSync(addonPath, '[]');
let addons = JSON.parse(fs.readFileSync(addonPath).toString());

if (argv.args[0] === 'db') {
    const dbConfig = fs.readFileSync(path.resolve(hydroPath, 'config.json'), 'utf-8');
    const url = buildUrl(JSON.parse(dbConfig));
    return child.spawn('mongo', [url], { stdio: 'inherit' });
}

if (argv.args[0] === 'backup') {
    const dbConfig = fs.readFileSync(path.resolve(hydroPath, 'config.json'), 'utf-8');
    const url = buildUrl(JSON.parse(dbConfig));
    const dir = `${os.tmpdir()}/${Math.random().toString(36).substring(2)}`;
    exec('mongodump', [url, `--out=${dir}/dump`], { stdio: 'inherit' });
    const env = `${os.homedir()}/.hydro/env`;
    if (fs.existsSync(env)) fs.copySync(env, `${dir}/env`);
    const target = `${process.cwd()}/backup-${new Date().toISOString().replace(':', '-').split(':')[0]}.zip`;
    exec('zip', ['-r', target, 'dump'], { cwd: dir, stdio: 'inherit' });
    if (!argv.options.dbOnly) {
        exec('zip', ['-r', target, 'file'], { cwd: '/data', stdio: 'inherit' });
    }
    exec('rm', ['-rf', dir]);
    console.log(`Database backup saved at ${target}`);
    return;
}

if (argv.args[0] === 'restore') {
    const dbConfig = fs.readFileSync(path.resolve(hydroPath, 'config.json'), 'utf-8');
    const url = buildUrl(JSON.parse(dbConfig));
    const dir = `${os.tmpdir()}/${Math.random().toString(36).substring(2)}`;
    if (!fs.existsSync(argv.args[1])) {
        console.error('Cannot find file');
        return;
    }
    exec('unzip', [argv.args[1], '-d', dir], { stdio: 'inherit' });
    exec('mongorestore', [`--uri=${url}`, `--dir=${dir}/dump/hydro`, '--drop'], { stdio: 'inherit' });
    if (fs.existsSync(`${dir}/file`)) {
        exec('rm', ['-rf', '/data/file/*'], { stdio: 'inherit' });
        exec('bash', ['-c', `mv ${dir}/file/* /data/file`], { stdio: 'inherit' });
    }
    if (fs.existsSync(`${dir}/env`)) {
        fs.copySync(`${dir}/env`, `${os.homedir()}/.hydro/env`, { overwrite: true });
    }
    fs.removeSync(dir);
    console.log('Successfully restored.');
    return;
}

if (!addons.includes('@hydrooj/ui-default')) {
    try {
        const ui = argv.options.ui || '@hydrooj/ui-default';
        require.resolve(ui);
        addons.push(ui);
    } catch (e) {
        console.error('Please also install @hydrooj/ui-default');
    }
}

if (argv.args[0] && argv.args[0] !== 'cli') {
    const operation = argv.args[0];
    const arg1 = argv.args[1];
    const arg2 = argv.args[2];
    if (operation === 'addon') {
        if (arg1 === 'create') {
            fs.mkdirSync('/root/addon');
            child.execSync('yarn init -y', { cwd: '/root/addon' });
            fs.mkdirSync('/root/addon/templates');
            fs.mkdirSync('/root/addon/locales');
            fs.mkdirSync('/root/addon/public');
            addons.push('/root/addon');
        } else if (arg1 === 'add') {
            for (let i = 0; i < addons.length; i++) {
                if (addons[i] === arg2) {
                    addons.splice(i, 1);
                    break;
                }
            }
            addons.push(arg2);
        } else if (arg1 === 'remove') {
            for (let i = 0; i < addons.length; i++) {
                if (addons[i] === arg2) {
                    addons.splice(i, 1);
                    break;
                }
            }
        }
        addons = Array.from(new Set(addons));
        console.log('Current Addons: ', addons);
        fs.writeFileSync(addonPath, JSON.stringify(addons, null, 2));
        return;
    }
    console.error('Unknown command: ', argv.args[0]);
} else {
    const hydro = require('../src/loader');
    addons = Array.from(new Set(addons));
    for (const addon of addons) hydro.addon(addon);
    (argv.args[0] === 'cli' ? hydro.loadCli : hydro.load)().catch((e) => {
        console.error(e);
        process.exit(1);
    });
}