using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework;
using DW.Stream;

namespace DWGame.Player
{
    public class Background
    {
        //struct to hold background attributes
        public struct background
        {
            public Vector2 position;
            public Rectangle bgBox;
            public Texture2D bgTex;
        }

        //array for backround entities
        public static background[] bgrnd;

        //array to hold collision boxes 
        public static Rectangle[] frgrnd;

        //counter to hold currect background frame
        public static int fgCounter;

        //constructor
        public Background()
        {
            fgCounter = 3;
            frgrnd = new Rectangle[28];
            bgrnd = new background[6];
            for (int i = 0; i < bgrnd.Length; i++)
            {
                    switch (i)
                    {
                        case 0:
                            bgrnd[i].bgTex = Renderer.content.Load<Texture2D>("starfield/Starfield4");
                            bgrnd[i].position = new Vector2(0, 0);
                            break;
                        case 1:
                            bgrnd[i].bgTex = Renderer.content.Load<Texture2D>("starfield/Starfield5");
                            bgrnd[i].position = new Vector2(bgrnd[0].position.X + bgrnd[0].bgBox.Width, 0);
                            break;
                        case 2:
                            bgrnd[i].bgTex = Renderer.content.Load<Texture2D>("starfield/Starfield6");
                            bgrnd[i].position = new Vector2(bgrnd[1].position.X + bgrnd[1].bgBox.Width, 0);
                            break;
                        case 3:
                            bgrnd[i].bgTex = Renderer.content.Load<Texture2D>("starfield/Starfield2");
                            bgrnd[i].position = new Vector2(bgrnd[0].position.X, 0);
                            break;
                        case 4:
                            bgrnd[i].bgTex = Renderer.content.Load<Texture2D>("starfield/Starfield3");
                            bgrnd[i].position = new Vector2(bgrnd[1].position.X, 0); 
                            break;
                        case 5:
                            bgrnd[i].bgTex = Renderer.content.Load<Texture2D>("starfield/Starfield1");
                            bgrnd[i].position = new Vector2(bgrnd[2].position.X, 0);
                            break;
                    }
                    
                bgrnd[i].bgBox = new Rectangle((int)bgrnd[i].position.X, (int)bgrnd[i].position.Y, (int)bgrnd[i].bgTex.Width, (int)bgrnd[i].bgTex.Height);

            }
        }

        //method used to update background and foreground position
        public static void Update()
        {
            if (PhoenixGame.gameTimer.IsRunning)
            {
                for (int i = 0; i < bgrnd.Length; i++)
                {

                        switch (i)
                        {
                            case 0:
                                bgrnd[i].position.X -= 2;
                                if ((bgrnd[i].position.X + bgrnd[i].bgBox.Width) < 0)
                                    bgrnd[i].position.X = bgrnd[2].position.X + bgrnd[2].bgBox.Width - 2;
                                break;
                            case 1:
                                bgrnd[i].position.X -= 2;
                                if ((bgrnd[i].position.X + bgrnd[i].bgBox.Width) < 0)
                                    bgrnd[i].position.X = bgrnd[0].position.X + bgrnd[0].bgBox.Width;
                                break;
                            case 2:
                                bgrnd[i].position.X -= 2;
                                if ((bgrnd[i].position.X + bgrnd[i].bgBox.Width) < 0)
                                    bgrnd[i].position.X = bgrnd[1].position.X + bgrnd[1].bgBox.Width;
                                break;
                            case 3:
                                bgrnd[i].position.X -= 1;
                                if ((bgrnd[i].position.X + bgrnd[i].bgBox.Width) < 0)
                                {
                                    bgrnd[i].position.X = bgrnd[5].position.X + bgrnd[5].bgBox.Width - 2;
                                    fgCounter = 4;
                                }
                                break;
                            case 4:
                                bgrnd[i].position.X -= 1;
                                if ((bgrnd[i].position.X + bgrnd[i].bgBox.Width) < 0)
                                {
                                    bgrnd[i].position.X = bgrnd[3].position.X + bgrnd[3].bgBox.Width;
                                    fgCounter = 5;
                                }
                                break;
                            case 5:
                                bgrnd[i].position.X -= 1;
                                if ((bgrnd[i].position.X + bgrnd[i].bgBox.Width) < 0)
                                {
                                    bgrnd[i].position.X = bgrnd[4].position.X + bgrnd[4].bgBox.Width;
                                    fgCounter = 3;
                                }
                                break;
                        }



                    bgrnd[i].bgBox = new Rectangle((int)(bgrnd[i].position.X), (int)bgrnd[i].position.Y, (int)bgrnd[i].bgTex.Width, (int)bgrnd[i].bgTex.Height);

                }
            }
            Background.setFrgrnd();
        }

        //method used to draw background and foreground
        public static void Draw()
        {
            for (int i = 0; i < bgrnd.Length; i++)
            {
                Renderer.spriteBatch.Draw(bgrnd[i].bgTex, bgrnd[i].bgBox, Color.White);
            }

            //for (int i = 0; i < frgrnd.Length; i++)
            //{
            //    Renderer.spriteBatch.Draw(bgrnd[5].bgTex, frgrnd[i], Color.Yellow);
            //}
        }

        //method used by AI to generate enemies based on current bg frame
        public static int getCounter()
        { return fgCounter; }

        //method used to pass foreground collsion boxes to Collision
        public static Rectangle[] getFrgrnd()
        { return frgrnd; }

        //method used to set the values for the collsion boxes to the values from Collision
        public static void setFrgrnd()
        {
            frgrnd[0] = new Rectangle((int)bgrnd[5].bgBox.X, (int)bgrnd[5].bgBox.Y, 109, 187);
            frgrnd[1] = new Rectangle((int)(frgrnd[0].X + frgrnd[0].Width), (int)frgrnd[0].Y, 82, 104);
            frgrnd[2] = new Rectangle((int)(frgrnd[1].X + frgrnd[1].Width), (int)frgrnd[1].Y, 102, 299);
            frgrnd[3] = new Rectangle((int)(frgrnd[2].X + frgrnd[2].Width), (int)frgrnd[2].Y, 275, 59);
            frgrnd[4] = new Rectangle((int)(frgrnd[3].X + frgrnd[3].Width), (int)frgrnd[3].Y, 98, 265);
            frgrnd[5] = new Rectangle((int)(frgrnd[4].X + frgrnd[4].Width), (int)frgrnd[4].Y, 124, 160);
            
            frgrnd[6] = new Rectangle((int)bgrnd[5].bgBox.X, (int)bgrnd[5].bgBox.Height - 168, 78, 168);
            frgrnd[7] = new Rectangle((int)(frgrnd[6].X + frgrnd[6].Width), (int)bgrnd[5].bgBox.Height - 236, 84, 236);
            frgrnd[8] = new Rectangle((int)(frgrnd[7].X + frgrnd[7].Width), (int)bgrnd[5].bgBox.Height - 153, 139, 153);
            frgrnd[9] = new Rectangle((int)(frgrnd[8].X + frgrnd[8].Width), (int)bgrnd[5].bgBox.Height - 178, 55, 178);
            frgrnd[10] = new Rectangle((int)(frgrnd[9].X + frgrnd[9].Width), (int)bgrnd[5].bgBox.Height - 125, 56, 125);
            frgrnd[11] = new Rectangle((int)(frgrnd[10].X + frgrnd[10].Width), (int)bgrnd[5].bgBox.Height - 348, 72, 348);
            frgrnd[12] = new Rectangle((int)(frgrnd[11].X + frgrnd[11].Width), (int)bgrnd[5].bgBox.Height - 153, 163, 153);
            frgrnd[13] = new Rectangle((int)(frgrnd[12].X + frgrnd[12].Width), (int)bgrnd[5].bgBox.Height - 184, 133, 184);
            
            frgrnd[14] = new Rectangle((int)bgrnd[3].bgBox.X, (int)bgrnd[3].bgBox.Y, 93, 150);
            frgrnd[15] = new Rectangle((int)(frgrnd[14].X + frgrnd[14].Width), (int)frgrnd[14].Y, 76, 108);
            frgrnd[16] = new Rectangle((int)(frgrnd[15].X + frgrnd[15].Width), (int)frgrnd[15].Y, 51, 65);
            frgrnd[17] = new Rectangle((int)(frgrnd[16].X + frgrnd[16].Width), (int)frgrnd[16].Y, 580, 23);

            frgrnd[18] = new Rectangle((int)bgrnd[3].bgBox.X, (int)bgrnd[3].bgBox.Height - 142, 92, 142);
            frgrnd[19] = new Rectangle((int)(frgrnd[16].X + frgrnd[16].Width), (int)bgrnd[3].bgBox.Height - 96, 46, 96);
            frgrnd[20] = new Rectangle((int)(frgrnd[16].X + frgrnd[16].Width), (int)bgrnd[3].bgBox.Height - 69, 662, 69);

            frgrnd[21] = new Rectangle((int)bgrnd[4].bgBox.X, (int)bgrnd[4].bgBox.Y, 666, 58);
            frgrnd[22] = new Rectangle((int)(frgrnd[21].X + frgrnd[21].Width), (int)frgrnd[21].Y, 79, 92);
            frgrnd[23] = new Rectangle((int)(frgrnd[22].X + frgrnd[22].Width), (int)frgrnd[22].Y, 55, 152);

            frgrnd[24] = new Rectangle((int)bgrnd[4].bgBox.X, (int)bgrnd[4].bgBox.Height - 87, 295, 87);
            frgrnd[25] = new Rectangle((int)(frgrnd[24].X + frgrnd[24].Width), (int)bgrnd[4].bgBox.Height - 107, 258, 107);
            frgrnd[26] = new Rectangle((int)(frgrnd[25].X + frgrnd[25].Width), (int)bgrnd[4].bgBox.Height - 169, 181, 169);
            frgrnd[27] = new Rectangle((int)(frgrnd[26].X + frgrnd[26].Width), (int)bgrnd[4].bgBox.Height - 160, 66, 160);

        }
    }
}