//////////// Node Parser
    //
const readline = require('readline');
const fs = require('fs');
const rl = readline.createInterface(process.stdin, process.stdout);
const prompt = 'CoinParser'

    rl.setPrompt(''+prompt+'> ');
rl.prompt();
// you can always expect two things
var cache = {
  tails:[],heads:{},tools:{map:function(fn){console.log(fn);for(var key=1;arguments[key];key++){fn(arguments[key]);};}}
};
var loadJSON = function(file_location, callback){
  // console.log("loadJSON");
  fs.readFile(file_location, function (err, data) {
     if (err) {
      console.log("error");
         return console.error(err);
     }
     console.log("callback(data)");
     callback(data);
     // console.log("Asynchronous read: " + data.toString());
  });
}
var open_chest = function(response){
    // console.log(response.toString());
    var api_handle = JSON.parse(response.toString())["head"];
    console.log("Loading API " + api_handle);
    var commands = JSON.parse(response.toString())["tail"];
    // console.log(commands);
    for(var prop in commands)
    {
        var coin = commands[prop];
        var tail  = new Function(coin.tail);
        cache.tails.push({description:coin.description,key:coin.head,payload:tail});//{key:input[1],payload:new Function(input.slice(2).join(" "))}
        // cache.tails.push({new Function(coin.tail)});
        cache.heads[coin.head] = cache.tails.length - 1;
        // console.log("working");
    }

    // ===========================
    rl.on('line', (line) => {
        var input =line.trim().split(" ");
        var arguments = input.slice(1).join(" ");
        // console.log(arguments);
        var command = input[0];
        switch(command){
          case 'heads':
            console.log(cache.heads);
            break;
          case 'tails':
            console.log(cache.tails);
            break;
          case 'exit':
            console.log('Have a great day!');
            process.exit(0);
            break;
          default:
            // console.log(cache.tails);
            if(typeof cache.heads[input[0]] !== "undefined"){
              var key = cache.heads[input[0]];
              console.log(cache.tails[key].key+"("+arguments+")");
              if(input[1]=="description"){
                console.log("*"+cache.tails[key].description);
              }else{
                // console.log("=>"+cache.tails[key].payload.apply(cache,arguments));
                console.log('payload -> '+cache.tails[key].payload);
                console.log('typeof input -> '+typeof input);
                console.log('typeof arguments -> '+typeof arguments);
                console.log("=>");
                console.log(cache.tails[key].payload.apply(cache,arguments.split(" ")));
              }
              // cache.tails[key](arguments);
            }else if(command==="new"){
              if(typeof input[1]==="undefined" || typeof input[2]==="undefined" ){
                console.log("Missing parameters for new.");

              }else{
                // var value = commands[prop];
                console.log(typeof arguments.split(" ")[1]);
                // console.log(input);
                cache.tails.push({key:input[1],payload:new Function(arguments.split(" ")[1])});
                // console.log(arguments.split(" "));
                cache.heads[input[1]] = cache.tails.length-1;
              }
            }else if(true){
              console.log(cache);
            }else{
              console.log("nossing!");
            }
          break;
        }

        rl.setPrompt(''+prompt+'> ');
        rl.prompt();
    }).on('close', () => {
        console.log('Have a great day!');
        process.exit(0);
    });
    // ===========================
};
var api = process.argv[2];
// if(typeof api === "undefined"){
  loadJSON(api,open_chest);
  // rl.setPrompt(''+prompt+'> ');
// }
// console.log("Exit");
    //
////////////