using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using EvilSatellites.Menu;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Input;
using DavyKager;

namespace EvilSatellites.Screens
{
    public class MenuScreen : IScreen
    {
        public MenuContainer MenuOptions;
        public int CursorPosition;
        public ScreenManager _Manager;
        public ScreenState _State;
        public InputManager Inputs = new InputManager();
        private double DescWaitTime;
        private bool DescRead;
        public ScreenManager Manager { get => _Manager; set => _Manager = value; }
        public ScreenState State { get => _State; set => _State = value; }

        public virtual void Activate()
        {
            CursorPosition = 0;
            Tolk.Output(MenuOptions.Title, false);
            Tolk.Output(MenuOptions.Description, false);
            Tolk.Output(MenuOptions.Entries[CursorPosition].Name);
            Manager.Sound.PlayOneshot(@"sfx/ui/menuOpen.wav");
            Manager.Music.Play("menu1");
            DescWaitTime = 0;
            DescRead = false;
        }

        public virtual void Deactivate()
        {
            return;
        }

        public void HandleInput(GameTime gameTime, KeyboardState inputs)
        {
            Inputs.Update();
            if (Inputs.IsJustPressed(Keys.Down) || Inputs.IsJustPressed(Buttons.DPadDown))
            {
                NextItem();
            }
            if (Inputs.IsJustPressed(Keys.Up) || Inputs.IsJustPressed(Buttons.DPadUp))
            {
                PreviousItem();
            }
            if (Inputs.IsJustPressed(Keys.Enter) || Inputs.IsJustPressed(Buttons.A))
            {
                SelectItem();
            }
        }

        public virtual void Update(GameTime gameTime)
        {
            Manager.Sound.Update();
            DescWaitTime += gameTime.ElapsedGameTime.TotalMilliseconds;
            if (DescWaitTime > 2000 && DescRead == false)
            {
                Tolk.Output(MenuOptions.Entries[CursorPosition].Description, false);
                DescRead = true;
            }
        }

        public void PreviousItem()
        {
            CursorPosition -= 1;
            CheckMenuBounds();
            ReadMenuItem();
        }

        public void NextItem()
        {
            CursorPosition += 1;
            CheckMenuBounds();
            ReadMenuItem();
        }

        public void CheckMenuBounds()
        {
            if (CursorPosition > MenuOptions.Entries.Count-1)
            {
                CursorPosition = 0;
                Manager.Sound.PlayOneshot(@"sfx/ui/menuBoundary.wav");
            }
            if (CursorPosition < 0)
            {
                CursorPosition = MenuOptions.Entries.Count-1;
                Manager.Sound.PlayOneshot(@"sfx/ui/menuBoundary.wav");
            }
        }

        public void ReadMenuItem()
        {
            Manager.Sound.PlayOneshot(@"sfx/ui/menuMove.wav");
            Tolk.Output(MenuOptions.Entries[CursorPosition].Name, true);
            DescRead = false;
            DescWaitTime = 0;
        }

        public virtual void SelectItem()
        {
            Manager.Sound.PlayOneshot(@"sfx/ui/menuChoose.wav");
            return;
        }
    }
}