using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace LevelGenerator_02
{
    class Program
    {
        static void Main(string[] args)
        {
            int[,] levelArray = new int[20, 20];                            //Setting size of level
                                                        //Populating initial level array with numbers 0-399
            int index = -1;
            int increacing = 0;
            double counter = 0;
            for (index = 0; increacing < 20 * 20; index++)
            {

                levelArray[((int)counter), index] = increacing;             //Loop to fill the array
                //Console.Write(levelArray[((int)counter), index] + "|");
                counter = counter + .05;
                increacing = increacing + 1;

                if (index == 19)
                {
                    index = -1;
                }

            }
            //Console.ReadKey();                                              //Finish populating level array with initial numbers.

            //--------------------------------------------------------------------------------------------------------------------------------
            //--------------------------------------------------------------------------------------------------------------------------------
            //--------------------------------------------------------------------------------------------------------------------------------

            Random randomVariable = new Random();                           //Begin the random level generation
            int startingPoint = randomVariable.Next(0, 19);
            int endingPoint = randomVariable.Next(0, 19);
            int blank = 2000;
            int wall = 3000;
            int start = 4000;
            int end = 5000;
            int currentPositionUpDown = 0;
            int currentPositionLeftRight = startingPoint;
            int randomDirection = randomVariable.Next(0,3);
            levelArray[0,startingPoint] = start;
            levelArray[19, endingPoint] = end;
            int errorControl = 0;
            int randomLevelSize = randomVariable.Next(500, 700);
            int currentLevelSize = 0;

            do{
                if (randomDirection == 0 && currentPositionLeftRight-2 <19 && currentPositionLeftRight-2 >0 && levelArray[(currentPositionUpDown), (currentPositionLeftRight - 2)] <= 400) //Move left 2
                {
                    currentPositionLeftRight = currentPositionLeftRight - 2;
                    levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                    currentPositionLeftRight = currentPositionLeftRight + 1;
                    levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                    currentPositionLeftRight = currentPositionLeftRight - 1;
                    errorControl = 0;
                }
                else if (randomDirection == 1 && currentPositionLeftRight+2 <19 && currentPositionLeftRight+2 >0 && levelArray[(currentPositionUpDown), (currentPositionLeftRight + 2)] <= 400) //Move right 2
                {
                    currentPositionLeftRight = currentPositionLeftRight + 2;
                    levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                    currentPositionLeftRight = currentPositionLeftRight - 1;
                    levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                    currentPositionLeftRight = currentPositionLeftRight + 1;
                    errorControl = 0;
                }
                else if (randomDirection == 2 && currentPositionUpDown+2 <19 && currentPositionUpDown+2 >0 && levelArray[(currentPositionUpDown +2), (currentPositionLeftRight)] <= 400) //Move down 2
                {
                    currentPositionUpDown = currentPositionUpDown + 2;
                    levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                    currentPositionUpDown = currentPositionUpDown - 1;
                    levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                    currentPositionUpDown = currentPositionUpDown + 1;
                    errorControl = 0;
                }
                else if (randomDirection == 2 && currentPositionUpDown-2 <19 && currentPositionUpDown-2 >0 && levelArray[(currentPositionUpDown -2), (currentPositionLeftRight)] <= 400) //Move up 2
                {
                    currentPositionUpDown = currentPositionUpDown - 2;
                    levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                    currentPositionUpDown = currentPositionUpDown + 1;
                    levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                    currentPositionUpDown = currentPositionUpDown - 1;
                    errorControl = 0;
                }

                errorControl = errorControl + 1;
                if (errorControl >= 5)
                {
                    if (randomDirection == 0 && currentPositionLeftRight - 2 <19 && currentPositionLeftRight - 2 >0 && levelArray[(currentPositionUpDown), (currentPositionLeftRight - 2)] == blank) //Move left 2
                    {
                        currentPositionLeftRight = currentPositionLeftRight - 2;
                        levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                        currentPositionLeftRight = currentPositionLeftRight + 1;
                        levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                        currentPositionLeftRight = currentPositionLeftRight - 1;
                        errorControl = 0;
                    }
                    else if (randomDirection == 1 && currentPositionLeftRight + 2 <19 && currentPositionLeftRight + 2 >0 && levelArray[(currentPositionUpDown), (currentPositionLeftRight + 2)] <= blank) //Move right 2
                    {
                        currentPositionLeftRight = currentPositionLeftRight + 2;
                        levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                        currentPositionLeftRight = currentPositionLeftRight - 1;
                        levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                        currentPositionLeftRight = currentPositionLeftRight + 1;
                        errorControl = 0;
                    }
                    else if (randomDirection == 2 && currentPositionUpDown + 2 <19 && currentPositionUpDown + 2 >0 && levelArray[(currentPositionUpDown+2), (currentPositionLeftRight)] <= blank) //Move down 2
                    {
                        currentPositionUpDown = currentPositionUpDown + 2;
                        levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                        currentPositionUpDown = currentPositionUpDown - 1;
                        levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                        currentPositionUpDown = currentPositionUpDown + 1;
                        errorControl = 0;
                    }
                    else if (randomDirection == 2 && currentPositionUpDown - 2 <19 && currentPositionUpDown - 2 >0 && levelArray[(currentPositionUpDown-2), (currentPositionLeftRight)] <= blank) //Move up 2
                    {
                        currentPositionUpDown = currentPositionUpDown - 2;
                        levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                        currentPositionUpDown = currentPositionUpDown + 1;
                        levelArray[(currentPositionUpDown), (currentPositionLeftRight)] = blank;
                        currentPositionUpDown = currentPositionUpDown - 1;
                        errorControl = 0;
                    }
                }
                randomDirection = randomVariable.Next(0, 3);
                currentLevelSize = currentLevelSize + 1;


            } while (levelArray[19, endingPoint] == end && currentLevelSize != randomLevelSize);

            //--------------------------------------------------------------------------------------------------------------------------------
            //--------------------------------------------------------------------------------------------------------------------------------
            //--------------------------------------------------------------------------------------------------------------------------------

            increacing = 0;                                                 //Writing out the level to console.
            double printCounter = 0;
            int[,] finalArray = new int[20, 20];
            for (index = 0; increacing < 20 * 20; index++)
            {
                increacing = increacing + 1;
                if (levelArray[(int)printCounter, index] == blank)
                {
                    Console.Write("  ");
                }
                else if (levelArray[(int)printCounter, index] == wall)
                {
                    Console.Write("|");
                }
                else if (levelArray[(int)printCounter, index] == start)
                {
                    Console.Write("S ");
                }
                else if (levelArray[(int)printCounter, index] == end)
                {
                    Console.Write("E ");
                }
                else if (levelArray[(int)printCounter, index] <= 400)
                {
                    Console.Write("__");
                }
                printCounter = printCounter + .05;
                if (index == 19)
                {
                    index = -1;
                    Console.WriteLine();
                }
            }
            Console.ReadKey();
        }
    }
}