#!/usr/bin/env node

const fss       = require('fs')
const spawnSync = require('child_process').spawnSync
const spawn     = require('child_process').spawn
const path      = require('path')

// Versions
const nodeJsVersion = "v14.16.1"
const rustcVersion  = "1.54.0-nightly"

// Configuration
const libImplDirName = 'impl'

let args = process.argv.slice(2)
function runRead(cmd, args) {
    let out = ''
    return new Promise((resolve, reject) => {
        let proc = spawn(cmd,args,{shell:true})
        proc.stderr.pipe(process.stderr)
        proc.stdout.on('data', (data) => { out += data })
        proc.on('exit', (code) => {
            if (code) process.exit(code);
            resolve(out)
        })
    })
}

async function checkVersion(name, required, cfg) {
    if (!cfg) { cfg = {} }
    let version = await runRead(name,['--version'])
    version     = version.trim()
    if (cfg.preprocess) { version = cfg.preprocess(version) } if (cfg.silent !== true) {
        console.log(`Checking '${name}' version.`)
    }
    if (version != required) {
        throw `[ERROR] The '${name}' version '${version}' does not match the required one '${required}'.`
    }
}

function runSync(cmd, args) {
    console.log(`Executing '${cmd} ${args.join(' ')}'`)
    let proc = spawnSync(cmd, args, {stdio: 'inherit', shell: true})
    if (proc.status != 0) {
        process.exit(proc.code)
    }
}

function testLibrary() {
    cwd = process.cwd()
    console.log(`In directory ${cwd}`)

    if (cwd.endsWith('macros')) {
        containedDirs = fss.readdirSync(path.join(cwd, '..'), {withFileTypes: true})
            .filter(f => f.isDirectory())
            .map(d => d.name)

        if (containedDirs.includes(libImplDirName)) return
    }

    runSync('wasm-pack', ['test', '--node'])
}

async function withCwd(dir, fn) {
    let cwd = path.dirname(__filename)
    process.chdir(dir)
    let out = await fn()
    process.chdir(cwd)
    return out
}

function testWasm() {
    let rootDir = path.join(path.dirname(__filename), '..')

    content = fss.readFileSync(path.join(rootDir, 'Cargo.toml'), {encoding: 'utf-8'})
    content = content.replace(/\s+|"/g, '')
    members = content.split('members')[1].split('[')[1].split(']')[0]
    dirs    = members.split(',').filter(d => d != '').map(d => path.join(rootDir, d))

    dirs.forEach(d => withCwd(d, testLibrary))
}

async function main() {
    await checkVersion("node", nodeJsVersion, { silent: true })
    await checkVersion('rustc', rustcVersion, {
        preprocess:(v) => v.substring(6,20), silent:true
    })

    if (args.includes('--test-wasm')) {
        testWasm()
    }
}

main()