import { existsSync, lstatSync, readdirSync, unlinkSync } from 'fs'
import commandLineArgs from 'command-line-args'
import { DistBase, ScriptBase, ScriptPath } from './paths'
import { readmeData, updateReadmeFile } from './readmefile'
import runBuild from './build'
import { UserScriptMetaFull } from './types'

const CLIArgs = commandLineArgs([
    { name: 'watch', alias: 'w', type: Boolean },
]) as {
    watch: boolean
}

//if package.json doesn't exist then there is no point in continuing
if (!existsSync('package.json') || !lstatSync('package.json').isFile()) {
    console.error('package.json not found, unwilling to run')
    process.exit(1)
}

//delete compiled scripts
readdirSync(DistBase).forEach(file => unlinkSync(`${DistBase}/${file}`))

//compile scripts
let scripts = readdirSync(ScriptBase)
let scriptMeta: readmeData[] = []

for (let name of scripts) {
    let path = ScriptPath(name)

    if (
        !name.endsWith('_') &&
        existsSync(path.dir) &&
        lstatSync(path.dir).isDirectory() &&
        existsSync(path.main) &&
        lstatSync(path.main).isFile()
    ) {
        let id = scriptMeta.length

        function postWatchUpdate(
            meta: UserScriptMetaFull,
            error: string | null
        ) {
            scriptMeta[id] = { meta, error }
            console.log('WATCH', name, meta.version)
            updateReadmeFile(scriptMeta)
        }

        let [meta, error] = runBuild(
            name,
            CLIArgs.watch ? postWatchUpdate : false
        )
        scriptMeta[id] = { meta, error }

        console.log(name, meta.version)
    }
}

updateReadmeFile(scriptMeta)

console.log(
    `\nFinished Compiling\n${CLIArgs.watch ? 'Listening for Changes\n' : ''}`
)