#!/usr/bin/env node

const cmd   = require('./build/cmd')
const fs    = require('fs').promises
const path  = require('path')
const os    = require('os')
const fss   = require('fs')
const paths = require('./build/paths')

process.on('unhandledRejection', error => { throw(error) })

let args = process.argv.slice(2)

let skip_validation = '--skip-version-validation'
async function init () {
    if(!args.includes(skip_validation)) {
        cmd.section('Version Validation')
        console.log("Use the `" + skip_validation + "` flag to skip it.")
        console.log("Querying npm for the latest LTS versions.")
        let [node_lts_version,npm_lts_version] = await cmd.get_node_lts_version()
        console.log("Checking versions of installed packages.")
        await cmd.check_version('node',node_lts_version)
        await cmd.check_version('npm',npm_lts_version)
        await cmd.check_version('rustc','1.59.0-nightly',{
            preprocess:(v)=>v.substring(6,20)
        })
    }

    let initialized = fss.existsSync(paths.dist.buildInit)
    if (!initialized) {
        cmd.section('Initialization')
        console.log('Installing build script dependencies.')
        await cmd.with_cwd(paths.script.root, async () => {
            await cmd.run('npm',['install'])
        })
        await fs.mkdir(paths.dist.root, {recursive:true})
        await fs.open(paths.dist.buildInit,'w')
    }
}

// Check the location of the repository root. It must not be located at `~/enso`, as this directory
// is used by project manager to store Enso's projects.
function throwIfInvalidRootLocation() {
    let rootPath = path.resolve(__dirname)
    let homeDir = os.homedir()
    if (rootPath == path.resolve(homeDir, 'enso')) {
        throw '~/enso location cannot be used as a repository root, please use a different location'
    }
}

async function main() {
    throwIfInvalidRootLocation()
    await init()
    cmd.run('node',[paths.script.run].concat(args))
}

main()