using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;

namespace WindowsGame6
{
    class levelgen
    {
        #region fields
        int levelwidth = 70;
        int levelheight = 70;
        int radius;
        Random random = new Random();
        int yoffset = 0;
        public Vector3 initialPosition;
        #endregion

        public int[,] generate()
        {

            int noRooms = random.Next(2, 8);
            int[] tile = new int[noRooms * 2];
            int[,] levelArray = new int[levelwidth, levelheight];
            int roomsGenerated = 0;
            int z = 0;

            while (roomsGenerated < noRooms)
            {

                bool wrongRoom = false;

                #region placetile

                do
                {
                    radius = random.Next(2, 4);
                    tile[z] = random.Next(radius, levelwidth - radius);
                    tile[z+1] = random.Next(radius, levelheight - radius);
                    wrongRoom = false;

                    for (int i = -(radius - 2); i < radius+1; i++)
                    {
                        for (int j = -(radius - 2); j < radius+1; j++)
                        {
                            if (levelArray[tile[z] + i, tile[z+1] + j] != 0)
                            {
                                wrongRoom = true;
                            }
                        }
                    }
                
                } while (wrongRoom);

#endregion

                System.Diagnostics.Debug.WriteLine("{0}, {1}; radius: {2}", tile[z], tile[z+1], radius);

                initialPosition = new Vector3((float)(tile[2] * 6.6), 0, (float)(tile[3] * 6.6));

                #region fillroom
                //           levelArray[tile[z], tile[z+1]] = 1;
                
                for (int i = -(radius - 1); i < radius; i++)
                {
                    for (int j = -(radius - 1); j < radius; j++)
                    {
                        levelArray[tile[z] + i, tile[z+1] + j] = 1;
                    }
                }

                #endregion

                #region connectRooms

                if (roomsGenerated > 0)
                {
                    //y axis tiles
                  
                    if ((tile[z] - tile[z - 2]) > 0) //if current row is further down than the old row
                    {
                        //starting at the current tile position, go down the row until we are parallel with the old tile
                        yoffset = 0;
                        while (tile[z] + yoffset > tile[z - 2]) //whilst we're still above the old tile
                        {
                            levelArray[tile[z] + yoffset, tile[z + 1]] = 1; //add a tile
                            yoffset--; // and move down
                        }
                    }
                    else if ((tile[z] - tile[z - 2]) < 0) //if current row is further up than the old row
                    {
                        //starting at the current tile position, go down the row until we are parallel with the old tile
                        yoffset = 0;
                        while (tile[z] + yoffset < tile[z - 2] + 1) //(whilst we're below the old tile)
                        {
                            levelArray[tile[z] + yoffset, tile[z + 1]] = 1; //add a tile
                            yoffset++; // and move up
                        }
                    }
                    
                    //x axis tiles
                    if ((tile[z + 1] - tile[z - 1]) > 0) //if current column is further to the right than the old one
                    {
                        int i = 0;
                        while (tile[z + 1] + i > (tile[z - 1] - 1))
                        {
                            levelArray[tile[z] + yoffset, tile[z + 1] + i] = 1; //add a tile
                            i--; // and move left
                        }
                    }

                    else if ((tile[z + 1] - tile[z - 1]) > 0) //if current column is further to the left than the old one
                    {
                        int i = 0;
                        while (tile[z + 1] + i < (tile[z - 1] + 1))
                        {
                            levelArray[tile[z] + yoffset, tile[z + 1] + i] = 1; //add a tile
                            i++; // and move right
                        }
                    }
                }

                #endregion

                #region drawWalls
                for (int q = 0; q < levelheight; q++)
                {
                    for (int p = 0; p < levelwidth; p++)
                    {
                        if (levelArray[q, p] == 1)
                        {
                            for (int i = -1; i < 2; i++)
                            {
                                for (int j = -1; j < 2; j++)
                                {
                                    if(levelArray[q + i, j + p] == 0)
                                        levelArray[q + i, j + p] = 10;
                                }
                            }
                        }
                    }
                }

                #endregion

                roomsGenerated++;
                z+=2;
            }

            return levelArray;
        }
    }
}