const { Lexer } = require('../lib/sheebr/lexer')
const { getline } = require('../lib/sheebr/utils')
const fs = require('fs')
const environment = require('../lib/sheebr/environment')
const readline = require('readline').createInterface({
    input: process.stdin,
    output: process.stdout,
    terminal: false
});
const readlineSync = require('../lib/sheebr/readLineSync')
let execSync = require('child_process').execSync


let current_dir = process.cwd()

start()

async function start(){
    while(true){
        input = await getline("sheebr> ");
        if(input == "exit") break;
        else evaluate(input);
    }
}

function evaluate(input){
    let lexer = new Lexer(input)
    args = lexer.scanTokens()

    if(args[0] == "cd"){
        if(args.length != 2){
            console.log("Wrong number of arguments"); return;}
        if(!fs.existsSync(args[1])){console.log("Folder does not exist"); return;}
        current_dir = args[1][0] == "/" ? args[1] : current_dir + '/' + args[1];
        console.log(current_dir)
        return;
    }
    // check for all folders in path

    let found = false;
    for(let path of environment.path){
        let tobreak = false;
        const files = fs.readdirSync(path);
        if(files.includes(`${args[0]}.js`)){
            found = true;
            script = execSync(`node ${path + '/' + args[0]}.js ${args.map(arg => {return arg.includes(' ') ? `"${arg}"` : arg}).join(' ')}`, {cwd: current_dir});
            process.stdout.write(script)
            tobreak = true;
        }

        if(tobreak) break;
    }
    if(!found){
        console.log("Program not found")
    }
    let program = args[0]
}