using Barotrauma.Lights;
using Barotrauma.Networking;
using FarseerPhysics;
using FarseerPhysics.Dynamics;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Xml.Linq;


namespace Barotrauma.Items.Components
{
    partial class Door : ItemComponent, IDrawableComponent, IServerSerializable
    {
        private ConvexHull convexHull;
        private ConvexHull convexHull2;

        private Vector2[] GetConvexHullCorners(Rectangle rect)
        {
            Vector2[] corners = new Vector2[4];
            corners[0] = new Vector2(rect.X, rect.Y - rect.Height);
            corners[1] = new Vector2(rect.X, rect.Y);
            corners[2] = new Vector2(rect.Right, rect.Y);
            corners[3] = new Vector2(rect.Right, rect.Y - rect.Height);

            return corners;
        }

        private void UpdateConvexHulls()
        {
            doorRect = new Rectangle(
                item.Rect.Center.X - (int)(doorSprite.size.X / 2),
                item.Rect.Y - item.Rect.Height / 2 + (int)(doorSprite.size.Y / 2.0f),
                (int)doorSprite.size.X,
                (int)doorSprite.size.Y);

            Rectangle rect = doorRect;
            if (isHorizontal)
            {
                rect.Width = (int)(rect.Width * (1.0f - openState));
            }
            else
            {
                rect.Height = (int)(rect.Height * (1.0f - openState));
            }

            if (window.Height > 0 && window.Width > 0)
            {
                rect.Height = -window.Y;

                rect.Y += (int)(doorRect.Height * openState);
                rect.Height = Math.Max(rect.Height - (rect.Y - doorRect.Y), 0);
                rect.Y = Math.Min(doorRect.Y, rect.Y);
                
                if (convexHull2 != null)
                {
                    Rectangle rect2 = doorRect;
                    rect2.Y = rect2.Y + window.Y - window.Height;

                    rect2.Y += (int)(doorRect.Height * openState);
                    rect2.Y = Math.Min(doorRect.Y, rect2.Y);
                    rect2.Height = rect2.Y - (doorRect.Y - (int)(doorRect.Height * (1.0f - openState)));
                    //convexHull2.SetVertices(GetConvexHullCorners(rect2));

                    if (rect2.Height == 0)
                    {
                        convexHull2.Enabled = false;
                    }
                    else
                    {
                        convexHull2.Enabled = true;
                        convexHull2.SetVertices(GetConvexHullCorners(rect2));
                    }
                }
            }
            
            if (convexHull == null) return;

            if (rect.Height == 0 || rect.Width == 0)
            {
                convexHull.Enabled = false;
            }
            else
            {
                convexHull.Enabled = true;
                convexHull.SetVertices(GetConvexHullCorners(rect));
            }
        }

        public void Draw(SpriteBatch spriteBatch, bool editing)
        {
            Color color = (item.IsSelected) ? Color.Green : Color.White;
            color = color * (item.Condition / 100.0f);
            color.A = 255;

            //prefab.sprite.Draw(spriteBatch, new Vector2(rect.X, -rect.Y), new Vector2(rect.Width, rect.Height), color);

            if (stuck > 0.0f && weldedSprite != null)
            {
                Vector2 weldSpritePos = new Vector2(item.Rect.Center.X, item.Rect.Y - item.Rect.Height / 2.0f);
                if (item.Submarine != null) weldSpritePos += item.Submarine.Position;
                weldSpritePos.Y = -weldSpritePos.Y;

                weldedSprite.Draw(spriteBatch,
                    weldSpritePos, Color.White * (stuck / 100.0f), 0.0f, 1.0f);
            }

            if (openState == 1.0f)
            {
                body.Enabled = false;
                return;
            }

            if (isHorizontal)
            {
                Vector2 pos = new Vector2(item.Rect.X, item.Rect.Y - item.Rect.Height / 2);
                if (item.Submarine != null) pos += item.Submarine.DrawPosition;
                pos.Y = -pos.Y;

                spriteBatch.Draw(doorSprite.Texture, pos,
                    new Rectangle((int)(doorSprite.SourceRect.X + doorSprite.size.X * openState), (int)doorSprite.SourceRect.Y,
                     (int)(doorSprite.size.X * (1.0f - openState)), (int)doorSprite.size.Y),
                    color, 0.0f, doorSprite.Origin, 1.0f, SpriteEffects.None, doorSprite.Depth);
            }
            else
            {
                Vector2 pos = new Vector2(item.Rect.Center.X, item.Rect.Y);
                if (item.Submarine != null) pos += item.Submarine.DrawPosition;
                pos.Y = -pos.Y;

                spriteBatch.Draw(doorSprite.Texture, pos,
                    new Rectangle(doorSprite.SourceRect.X, (int)(doorSprite.SourceRect.Y + doorSprite.size.Y * openState),
                    (int)doorSprite.size.X, (int)(doorSprite.size.Y * (1.0f - openState))),
                    color, 0.0f, doorSprite.Origin, 1.0f, SpriteEffects.None, doorSprite.Depth);
            }

        }
    }
}