using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Input.Touch;
using Penguloon.Levels;
using Penguloon.Objects;
using Penguloon.Scenes;
using System.Collections.Generic;
using System;

namespace Penguloon.Controls
{
    public enum State
    {
        Selected,
        Idle,
    }

    public class ObjectSelector : ControlBase
    {
        public State State { get; set; }

        public int SelectedObjectIndex { get; set; } = -1;

        public Map Map { get; set; }

        public List<Tuple<ObjectBase, int>> Objects { get; set; } = new List<Tuple<ObjectBase, int>>();

        public ObjectSelector(Map map, SceneBase parentScene, Vector2 position, Vector2 size) : base(parentScene, position, size)
        {
            this.Map = map;
            this.BackgroundIdle = ContentManager.GetTexture("UI/objectSelectionBackground");
            this.BackgroundPressed = ContentManager.GetTexture("UI/objectSelectionBackground");
            this.BackgroundDisabled = ContentManager.GetTexture("UI/objectSelectionBackground");

            this.OnClick += ObjectSelector_OnClick;

            LoadObjects();
        }

        private void ObjectSelector_OnClick(object sender, ClickArgs e)
        {
            int rows = 4;

            if (Objects.Count > 8)
            {
                rows = (int)Math.Ceiling((double)Objects.Count / 2);
            }

            int width = (int)Size.X / 2;
            int height = (int)Size.Y / rows;

            int oddX = (int)Position.X;
            int evenX = (int)Position.X + width;

            Rectangle fingerRec = new Rectangle((int)e.ClickPosition.X, (int)e.ClickPosition.Y, 1, 1);

            for (int i = 0; i < Objects.Count; i++)
            {
                if (Objects[i].Item2 > Map.Level.Money) continue;

                int posX = ((i + 1) % 2 != 0) ? oddX : evenX;
                int posY = (i / 2) * height;

                Rectangle rec = new Rectangle(posX, (int)Position.Y + posY, width, height);

                if (fingerRec.Intersects(rec))
                {
                    if (SelectedObjectIndex != i)
                    {
                        SelectedObjectIndex = i;
                        State = State.Selected;
                    }
                    else
                    {
                        SelectedObjectIndex = -1;
                        State = State.Idle;
                    }
                    return;
                }
            }
        }

        private void LoadObjects()
        {
            Objects.Add(new Tuple<ObjectBase,int>(new PenguinObject(Map), 250));
            Objects.Add(new Tuple<ObjectBase, int>(new GoldPenguinObject(Map), 360));
            Objects.Add(new Tuple<ObjectBase, int>(new CannonObject(Map), 650));
        }

        public override void Update(float deltaTime, TouchLocation[] touchLocations)
        {
            base.Update(deltaTime, touchLocations);
        }

        public override void Draw(float deltaTime)
        {
            base.Draw(deltaTime);

            int rows = 4;

            if(Objects.Count > 8)
            {
                rows = (int)Math.Ceiling((double)Objects.Count / 2);
            }

            int width = (int)Size.X / 2;
            int height = (int)Size.Y / rows;

            int oddX = (int)Position.X;
            int evenX = (int)Position.X + width;

            int padding = 15;

            for (int i = 0; i < Objects.Count; i++)
            {
                int posX = ((i+1) % 2 != 0) ? oddX : evenX;
                int posY = (i / 2) * height;

                if(State == State.Selected && i == SelectedObjectIndex)
                {
                    ParentScene.Main.SpriteBatch.Draw(ContentManager.GetTexture("UI/red"),
                     destinationRectangle: new Rectangle(posX, (int)Position.Y + posY, width, height));
                }

                int widthToDraw = height - (padding * 2);

                ParentScene.Main.SpriteBatch.Draw(Objects[i].Item1.Texture, 
                    destinationRectangle: new Rectangle(posX + (width - widthToDraw) / 2, (int)Position.Y + posY + padding, widthToDraw, height - (padding * 2)));

                ParentScene.DrawText(ContentManager.GetFont("Fonts/GWENT/36"), Objects[i].Item2.ToString(), new Vector2(posX, (int)Position.Y + posY),
                    new Vector2(width, height), TextAllignment.CenterBottom, Color.White, Color.Black, 2);
            }

            // Draw borders
            ParentScene.Main.SpriteBatch.Draw(ContentManager.GetTexture("UI/objectSelectionBorder"),
                destinationRectangle: new Rectangle(evenX - 2, (int)Position.Y, 4, (int)Size.Y));

            for(int x = 1; x < rows; x++)
            {
                // Draw borders
                ParentScene.Main.SpriteBatch.Draw(ContentManager.GetTexture("UI/objectSelectionBorder"),
                    destinationRectangle: new Rectangle(oddX, (int)Position.Y + (x * height), (int)Size.X, 4));
            }
        }
    }
}