using UnityEngine;
using System.Collections;
using UnityEngine.UI;

public class GameMaster : MonoBehaviour
{

    public enum State { idle, moveRoll, monster, flee };
    public enum Tile { stone, pumpkin, candy, monster1, monster2, monster3 };

    public Material[] mats;

    public GameObject player;
    public GameObject[] tiles;
    public Tile[] tileType;
    public State state;

    public Text btn1text, btn2text, btn3text, infoText, scoreText;
    public Camera mainCam;
    public Button btn1, btn2, btn3;

    int dieValue;
    public GameObject dieObject;
    static float[,] dieRotations = { { 0, 0, 0 }, { -90, 0, 0 }, { 0, 0, -90 }, { 0, 0, 90 }, { 90, 0, 0 }, { 180, 0, 0 } };

    int playerPos;
    Vector3 playerOffset;

    // Use this for initialization
    void Start()
    {
        int i, j;
        tileType = new Tile[tiles.Length];

        for (i = 0; i < tiles.Length; i++)
        {
            // use the name of the tiles to populate the array
            tiles[i] = GameObject.Find("tile" + i);
            if (tiles[i])
            {
                // use the material's name to set the type
                Material mat = tiles[i].GetComponent<Renderer>().material;
                tileType[i] = Tile.stone;
                for (j = 0; j < mats.Length; j++)
                    if (mat.name.IndexOf(mats[j].name) >= 0)
                        tileType[i] = (Tile)j;
            }
        }
        RollDie();
        playerOffset = tiles[0].transform.position - player.transform.position;
        PlacePlayer(0);     // starting position for the game
        PlaceButtons();     // place the buttons based on the screen size
        state = State.idle; // initial state
        SetButtons();
        infoText.text = "";
    }

    // Places the player on a tile given by the index in the tiles array.
    // Only uses the x and z of the tile.
    public void PlacePlayer(int place)
    {
        player.transform.position = new Vector3(tiles[place].transform.position.x,
                                                player.transform.position.y,
                                                tiles[place].transform.position.z) + playerOffset;
        playerPos = place; // index in the array of tiles
    }

    // Update is called once per frame
    // Will probably need this to implement the actions
    void Update()
    {

    }

    // Sets the rotation of the die object based on the value of the die.
    void SetDie(int value)
    {
        float x, y, z;
        if (1 <= value && value <= 6)
        {
            x = dieRotations[value - 1, 0];
            y = dieRotations[value - 1, 1];
            z = dieRotations[value - 1, 2];
            dieObject.transform.eulerAngles = new Vector3(x, y, z);
        }
    }

    // Roll the die randomly, then set the die object and the info text.
    void RollDie()
    {
        dieValue = Random.Range(1, 6);       // random die
        SetDie(dieValue);
        infoText.text = "Roll: " + dieValue; // show it
    }

    //place the buttons based on the screen size
    void PlaceButtons()
    {
        //Camera cam = GameObject.Find("Main Camera");
        //Button btn = GameObject.Find("Button1") as Button;
        float ymax = Screen.height;
        float xmax = Screen.width;
        float wid, hei;
        wid = btn1.GetComponent<RectTransform>().rect.width;
        hei = btn1.GetComponent<RectTransform>().rect.height;
        btn1.transform.position = new Vector3(xmax / 2 - 10f - 1.5f * wid, ymax - hei / 2 - 5f,
                                              btn1.transform.position.z);
        btn2.transform.position = new Vector3(xmax / 2 - wid / 2, ymax - hei / 2 - 5f,
                                              btn2.transform.position.z);
        btn3.transform.position = new Vector3(xmax / 2 + wid / 2 + 10f, ymax - hei / 2 - 5f,
                                              btn3.transform.position.z);

        wid = scoreText.GetComponent<RectTransform>().rect.width;
        hei = scoreText.GetComponent<RectTransform>().rect.height;
        scoreText.transform.position = new Vector3(5f + wid / 2, 5f,
                                                   scoreText.transform.position.z);
        wid = infoText.GetComponent<RectTransform>().rect.width;
        hei = infoText.GetComponent<RectTransform>().rect.height;

        infoText.transform.position = new Vector3(xmax - wid / 2 - 5f, ymax - hei / 2 - 5f,
                                                  infoText.transform.position.z);

    }

    // first button action
    public void Action1()
    {
        switch (state)
        {
            case State.idle:
                RollDie();
                state = State.moveRoll;              // next state
                break;
        }
        SetButtons();
    }

    // Sets the text of the buttons based on the context.
    void SetButtons()
    {
        btn1text.text = "";
        btn2text.text = "";
        btn3text.text = "";

        switch (state)
        {
            case State.idle:
                btn1text.text = "Roll";
                break;
        }
    }
}