using UnityEngine;
using System.Collections;

public class PauseMenuScript : MonoBehaviour
{
    public GUISkin myskin;  //custom GUIskin reference
    public string levelToLoad;
    public bool paused = false;
    public string current;

    private void Start()
    {
        Time.timeScale=1; //Set the timeScale back to 1 for Restart option to work
    }

    private void Update()
    {

        if (Input.GetKeyDown(KeyCode.Escape) ) //check if Escape key/Back key is pressed
        {
            if (!paused)
            {
                paused = true;  //pause the game if not paused
                current = "MAIN"; //everytime I press ESC
            }
            else
                paused = false; //unpause the game if already paused
        }

        if(paused)
            Time.timeScale = 0;  //set the timeScale to 0 so that all the procedings are halted
        else
            Time.timeScale = 1;  //set it back to 1 on unpausing the game

    }

    private void OnGUI()
    {
        GUI.skin=myskin;   //use the custom GUISkin

        if (paused)
        {

            if(current == "MAIN")
            {
                GUI.Box(new Rect(Screen.width/4, Screen.height/5, Screen.width/2, 80), "PAUSED");

                if (GUI.Button(new Rect(Screen.width/4+10, Screen.height/4+Screen.height/10+10, Screen.width/2-20, Screen.height/10), "RESUME"))
                {
                    paused = false;
                }

                if (GUI.Button(new Rect(Screen.width/4+10, Screen.height/4+2*Screen.height/10+10, Screen.width/2-20, Screen.height/10), "RESTART"))
                {
                    Application.LoadLevel("map_forest");
                }
                if (GUI.Button(new Rect(Screen.width/4+10, Screen.height/4+3*Screen.height/10+10, Screen.width/2-20, Screen.height/10), "SETTINGS"))
                {
                    current = "SETTINGS";
                }
                if (GUI.Button(new Rect(Screen.width/4+10, Screen.height/4+4*Screen.height/10+10, Screen.width/2-20, Screen.height/10), "MAIN MENU"))
                {
                    Application.LoadLevel("main-menu");
                }
            }
            if (current == "SETTINGS")
            {
                GUI.Box(new Rect(Screen.width/4, Screen.height/5, Screen.width/2, 80), "SETTINGS");
                if (GUI.Button(new Rect(Screen.width/4+10, Screen.height/4+2*Screen.height/10+10, Screen.width/2-20, Screen.height/10), "INSTRUCTIONS"))
                {
                    current = "INSTRUCTIONS";
                }
                if (GUI.Button(new Rect(Screen.width/4+10, Screen.height/4+3*Screen.height/10+10, Screen.width/2-20, Screen.height/10), "RESOLUTION"))
                {
                    current = "RESOLUTION";
                }
            }
            if(current == "INSTRUCTIONS")
            {
                GUI.Box(new Rect(Screen.width/4, Screen.height/5, Screen.width/2, 80), "INSTRUCTIONS");
                if(GUI.Button (new Rect(Screen.width/4+10, Screen.height/6*5, Screen.width/2-20, Screen.height/10),"RETURN TO SETTINGS"))
                {
                    current = "SETTINGS";
                }
                GUI.Box (new Rect(Screen.width/4+10, Screen.height/4+30, Screen.width/2-20, Screen.height/3),"QSDZ to move, F to Fire, Left Click for Melee, Space to Jump");
            }
            if(current == "RESOLUTION")
            {
                GUI.Box(new Rect(Screen.width/4, Screen.height/5, Screen.width/2, 80), "RESOLUTION");
                if(GUI.Button (new Rect(Screen.width/4+10, Screen.height/6*5, Screen.width/2-20, Screen.height/10),"RETURN TO SETTINGS"))
                {
                    current = "SETTINGS";
                }
            }


        }
    }
}