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//
// Created by Joshua Weinstein on 3/10/16.
// Copyright (c) 2016 Joshua Weinstein. All rights reserved.
//

import Foundation

//initializable assembler
struct Assembler {
    var mode:String
    var current:Any

    init() {
        self.mode = "FIRST"
        self.current = 0
    }

    mutating func assemble(var instrucs:[Token]) -> Void {
        self.setupfirst(instrucs)
        for(var i=1;i<instrucs.count;i++) {
            if self.mode == "int" {
                if instrucs[i].type == "oper" {
                    let temp = instrucs[i].element as! String
                    switch(temp) {
                    case "+":
                        var num = self.current as! Int
                        num += instrucs[i+1].element as! Int
                        self.current = num
                    default:
                        print("INVALID OPER")
                    }
                }
            }
            else if self.mode == "string" {
                if instrucs[i].type == "oper" {
                    let temp = instrucs[i].element as! String
                    switch(temp) {
                    case "&":
                    var tempstr = self.current as! String
                    tempstr += instrucs[i+1].element as! String
                    self.current = tempstr
                    default:
                        print("INVALID OPER")
                    }
                }
            }
        }
        self.printresult()
    }
    mutating func setupfirst(instrucs:[Token]) {
        switch(instrucs[0].type) {
        case "int":
            self.mode = "int"
            self.current = instrucs[0].element
        case "string":
            self.mode = "string"
            self.current = instrucs[0].element
        default:
            print("INAVLID TOKEN TYPE")

        }
    }

    func printresult() -> Void {
        if self.mode == "int" {
            print(self.current)
        }
        else if self.mode == "string" {
            var temp = self.current as! String
            temp = "`" + temp + "`"
            print(temp)
        }
    }
}