const FS = require('fs/promises')
const Path = require('path')

const themePath = process.env.HOME ? Path.join(process.env.HOME, '.config/base16.css') : 'base16.css'

function handle(sPath) {
    return {
        name: Path.basename(sPath),
        path: absolute(sPath)
    }
}

function absolute(sPath) {
    return Path.isAbsolute(sPath) ? sPath : Path.join(window.cwd, sPath)
}

export async function Init() {
    window.cwd = nw.App.startPath

    await loadTheme()
	watchTheme()
}

async function watchTheme() {
	let watcher = await FS.watch(themePath)
	for await (const event of watcher) {
		await loadTheme()
	}
}

async function loadTheme() {
	let f = await Open(handle(themePath))
	loadStylesheet(f)
}

function loadStylesheet(fStylesheet) {
	let l = document.createElement('link')
	l.rel = "stylesheet"
	l.href = URL.createObjectURL(fStylesheet)
	document.head.appendChild(l)
}

export async function Entries() {   
    let pool = new Map()

    for(let d of await FS.readdir(window.cwd, { withFileTypes: true })) {
        if(d.isFile()) {
            let h = handle(d.name)
            pool.set(d.name, h)
        }
    }

    return pool
}

export async function Create(sPath) {
    return handle(sPath)
} 

export async function Open(hFile) {
    let b = await FS.readFile(hFile.path)
    return new File([ b ], hFile.name)
}

export async function Write(hFile, sContent) {
    return await FS.writeFile(hFile.path, sContent, { encoding: 'utf-8' })
}