import { Item } from '../fs/Item'
import type { SimpleStream } from '../utils/SimpleStream'
import { Program } from './Program'

export class Ls extends Program {
    constructor() {
        super()
    }

    async Exec(_: SimpleStream<string>, stdout: SimpleStream<string>, workdir: Item, args: string[]): Promise<number> {
        // open the target directory, default to workdir
        const item = args[1]
            ? await Item.openDir(Item.NormalizePath(
                args[1].startsWith('/')
                    ? args[1]
                    : `${workdir.GetPath()}/${args[1]}`
                ))
            : workdir

        if (args[1] && !item.IsDirectory()) {
            stdout.emit("ls: error: the provided path is not a directory\n")
            return 1
        }

        if (!(await item.Exists())) {
            stdout.emit(`ls: error: path ${item.GetPath()} doesn't exist\n`)
            return 2
        }

        stdout.emit(`-> Listing contents of item: '${item.GetPath()}'\n`)
        stdout.emit(`   [ drwx     name     ]\n`)
        const items = await item.List()
        items.forEach(entry => {
            stdout.emit(`   | ${`${(entry.IsDirectory() ? 'd' : '-')}${(entry.IsReadable() ? 'r' : '-')}${(entry.IsWritable() ? 'w' : '-')}${(entry.IsExecutable() ? 'x' : '-')}`.padEnd(8, ' ')} ${entry.IsDirectory() ? '\x1B[0;30m\x1B[47m' : ''}${entry.GetName()}\x1B[0m\n`)
        })

        return 0
    }
}