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

//got to create IA to tell when game is over
//would be great to change shadow shade to brown
//add a menu to restart
//add music
//add animation or at least picture on loading

public class TokenBehaviour : MonoBehaviour
{
    private Vector3 mOffset;
    private Vector3 startingPosition;
    private Vector3 slotPosition;
    private float mZCoord;
    private bool triggered = false;
    private Rigidbody rBody;
    private Collider InitialTriggerVolume;
    private bool initTrigger = true;
    public Text countText;
    public Text winText;
    public Text winInfoText;
    private float fDistance;
    private double dDistance;
    private Vector3 intersection;
    private Vector3[] TriggerVolumePositions = new Vector3[15];
    private Vector3[] TokenPositions = new Vector3[15];
    private float positionOffset = 0.4F;
    private int pegLeftCounter = 0;

    void Start()
    {
        rBody = GetComponent<Rigidbody>();
        SetCountText();
        winText.text = "";
        winInfoText.text = "";
        for (int i=0;i<15;i++)
        {
            TriggerVolumePositions[i] = GameObject.Find("TriggerVolume"+i.ToString()).transform.position;
            TokenPositions[i] = GameObject.Find("Token"+i.ToString()).transform.position;
            //got to test this for optimization:
            //TriggerVolumePositions[i] = GameValue.TriggerVolumePositions[i];
            //TokenPositions[i] = GameValue.TokenPositions[i];
        }
    }

    private void OnMouseDown()
    {
        if (!GameValue.showMenu)
        {
            startingPosition = transform.position;
            mZCoord = Camera.main.WorldToScreenPoint(gameObject.transform.position).z;
            mOffset = gameObject.transform.position - GetMouseWorldPos();
        }
    }

    private void OnMouseUp()
    {
        if (!GameValue.showMenu)
        {
            string slotInBetweenID = slotInBetween();
            string destinationSlotID = destinationSlot();
            fDistance = Vector3.Distance(slotPosition, startingPosition);
            dDistance = Convert.ToDouble(fDistance);
            GameValue.TokenStartingPos = startingPosition;
            GameValue.TokenToReactivate = "Token" + slotInBetweenID;
            GameValue.OldName = gameObject.name;
            GameValue.NewName = "Token" + destinationSlotID;
            GameValue.InitialTriggerVolume = InitialTriggerVolume.gameObject.name;
            GameValue.SlotInBetweenID = slotInBetweenID;
            GameValue.DestinationSlotID = destinationSlotID;
            if (triggered && (dDistance > 10.8 && dDistance < 13.4))
            {
                GameValue.canCancel = true;
                transform.position = slotPosition;
                rBody.velocity = Vector3.zero;
                GameValue.numberOfPegsLeft--;
                GameObject.Find(InitialTriggerVolume.gameObject.name).GetComponent<PegSlot>().freeSlot = true;
                GameObject.Find("TriggerVolume" + slotInBetweenID).GetComponent<PegSlot>().freeSlot = true;
                GameObject.Find("TriggerVolume" + destinationSlotID).GetComponent<PegSlot>().freeSlot = false;
                GameObject.Find("Token" + slotInBetweenID).SetActive(false);
                gameObject.name = "Token" + destinationSlotID;
                SetCountText();
            }
            else
            {
                transform.position = startingPosition;
                rBody.velocity = Vector3.zero;
            }
            if (GameValue.firstRoundDone && isGamerOver())
            {
                //countText.text = "";
                for (int i = 0; i < 15; i++)
                {
                    if (!GameObject.Find("TriggerVolume" + i).GetComponent<PegSlot>().freeSlot)
                    {
                        pegLeftCounter++;
                    }
                }
                winText.text = "Game Over\n" + pegLeftCounter + "peg left";
                if (pegLeftCounter == 1)
                {
                    winInfoText.text = "You nailed it";
                }
                else if (pegLeftCounter == 2)
                {
                    winInfoText.text = "Close";
                }
                else if (pegLeftCounter == 3)
                {
                    winInfoText.text = "You can do better";
                }
                else if (pegLeftCounter > 3)
                {
                    winInfoText.text = "Try again";
                }
            }
            initTrigger = true;
            //testDIrectionVector();
        }
    }

    private Vector3 GetMouseWorldPos()
    {
        Vector3 mousePoint = Input.mousePosition;
        mousePoint.z = mZCoord;
        return Camera.main.ScreenToWorldPoint(mousePoint);
    }

    private void OnMouseDrag()
    {
        if (!GameValue.showMenu)
        {
            transform.position = GetMouseWorldPos() + mOffset;
            transform.position = new Vector3(transform.position.x, 6, transform.position.z);
        }
    }

    void OnTriggerEnter(Collider other)
    {
        if (other.gameObject.CompareTag("Trigger Volume") && GameObject.Find(other.gameObject.name).GetComponent<PegSlot>().freeSlot)
        {
            triggered = true;
            slotPosition = other.gameObject.transform.position;
        }
    }

    void OnTriggerExit(Collider other)
    {
        if(initTrigger && other.gameObject.CompareTag("Trigger Volume"))
        {
            InitialTriggerVolume = other;
            initTrigger = false;
        }
        else if (other.gameObject.CompareTag("Trigger Volume"))
        {
            triggered = false;
        }
        else if (other.gameObject.CompareTag("BoundingArea") && !GameValue.firstRoundDone)
        {
            GameValue.numberOfPegsLeft--;
            GameObject.Find(InitialTriggerVolume.gameObject.name).GetComponent<PegSlot>().freeSlot = true;
            GameValue.firstRoundDone = true;
            gameObject.SetActive(false);
            SetCountText();
            GameValue.TokenStartingPos = startingPosition;
            GameValue.OldName = gameObject.name;
            GameValue.InitialTriggerVolume = InitialTriggerVolume.gameObject.name;
            GameValue.canCancel = true;
        }
    }

    void SetCountText()
    {
        countText.text = "Peg left : " + GameValue.numberOfPegsLeft.ToString();
    }

    private string slotInBetween()
    {
        string slotInBetween = "";
        intersection.x = (startingPosition.x + slotPosition.x) / 2;
        intersection.y = 4.54F;
        intersection.z = (startingPosition.z + slotPosition.z) / 2;
        for (int i = 0; i < 15; i++)
        {
            if(((intersection.x > TriggerVolumePositions[i].x - positionOffset) && (intersection.x < TriggerVolumePositions[i].x + positionOffset)) 
                && ((intersection.z > TriggerVolumePositions[i].z - positionOffset) && (intersection.z < TriggerVolumePositions[i].z + positionOffset)))
            {
                slotInBetween = i.ToString();
            }
        }
        return slotInBetween;
    }

    private string destinationSlot()
    {
        string destinationSlot = "";
        for (int i = 0; i < 15; i++)
        {
            if (((slotPosition.x > TokenPositions[i].x - positionOffset) && (slotPosition.x < TokenPositions[i].x + positionOffset))
                && ((slotPosition.z > TokenPositions[i].z - positionOffset) && (slotPosition.z < TokenPositions[i].z + positionOffset)))
            {
                destinationSlot = i.ToString();
            }
        }
        return destinationSlot;
    }
    private bool isGamerOver()
    {
        bool gameOver = true;
        Vector3 vDirection;
        Vector3 vDirectionInBetween;
        for (int i = 0; i < 15; i++)//pegLeft ID
        {
            if (!GameObject.Find("TriggerVolume" + i).GetComponent<PegSlot>().freeSlot)
            {
                for (int j = 0; j < 15; j++)//free stop at 2 distance ID
                {
                    if (Vector3.Distance(TokenPositions[i], TokenPositions[j]) > 11 && Vector3.Distance(TokenPositions[i], TokenPositions[j]) < 13 
                        && GameObject.Find("TriggerVolume" + j).GetComponent<PegSlot>().freeSlot)
                    {
                        vDirection = TokenPositions[i] - TokenPositions[j];
                        for (int k = 0; k < 15; k++) //pegLeft between ID.
                        {
                            vDirectionInBetween = TokenPositions[i] - TokenPositions[k];
                            if (Vector3.Distance(vDirection / 2, vDirectionInBetween) < 1 && !GameObject.Find("TriggerVolume" + k).GetComponent<PegSlot>().freeSlot)
                            {
                                gameOver = false;
                                break;
                            }
                        }
                    }
                }
            }
        }
        GameValue.IsGameOver = gameOver;
        return gameOver;
    }
}