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

namespace DIGIEVO
{
    public static class Input
    {
        public enum InputMode
        {
            Combat,
            CombatWait,
            Ignore,
            VerticalMenu,
            Text,
            Notification,
            YesNo
        }

        public static KeyboardState oldState;
        public static KeyboardState newState;
        public static InputMode inputMode = InputMode.Combat;
        public static string enteredText = "";

        public static void Initialize()
        {
            newState = Keyboard.GetState();
        }

        public static void Update()
        {
            oldState = newState;
            newState = Keyboard.GetState();

            switch (inputMode)
            {
                case InputMode.Combat:
                    if (KeyPressed(Buttons.Left)) Combat.MoveSelection(-1, 0);
                    if (KeyPressed(Buttons.Right)) Combat.MoveSelection(1, 0);
                    if (KeyPressed(Buttons.Up)) Combat.MoveSelection(0, -1);
                    if (KeyPressed(Buttons.Down)) Combat.MoveSelection(0, 1);
                    if (KeyPressed(Buttons.Confirm)) Combat.ConfirmAttack();
                    break;
                case InputMode.CombatWait:
                    if (KeyPressed(Buttons.Confirm)) Combat.Confirm();
                    break;
                case InputMode.VerticalMenu:
                    if (KeyPressed(Buttons.Up)) Menu.MoveSelection(-1);
                    if (KeyPressed(Buttons.Down)) Menu.MoveSelection(1);
                    if (KeyPressed(Buttons.Confirm) /*|| KeyPressed(Keys.Right)*/) Menu.Confirm();
                    if (KeyPressed(Buttons.Cancel) /*|| KeyPressed(Keys.Left)*/) Menu.Cancel();
                    break;
                case InputMode.Text:
                    if (KeyPressed(Keys.A)) enteredText += "A";
                    if (KeyPressed(Keys.B)) enteredText += "B";
                    if (KeyPressed(Keys.C)) enteredText += "C";
                    if (KeyPressed(Keys.D)) enteredText += "D";
                    if (KeyPressed(Keys.E)) enteredText += "E";
                    if (KeyPressed(Keys.F)) enteredText += "F";
                    if (KeyPressed(Keys.G)) enteredText += "G";
                    if (KeyPressed(Keys.H)) enteredText += "H";
                    if (KeyPressed(Keys.I)) enteredText += "I";
                    if (KeyPressed(Keys.J)) enteredText += "J";
                    if (KeyPressed(Keys.K)) enteredText += "K";
                    if (KeyPressed(Keys.L)) enteredText += "L";
                    if (KeyPressed(Keys.M)) enteredText += "M";
                    if (KeyPressed(Keys.N)) enteredText += "N";
                    if (KeyPressed(Keys.O)) enteredText += "O";
                    if (KeyPressed(Keys.P)) enteredText += "P";
                    if (KeyPressed(Keys.Q)) enteredText += "Q";
                    if (KeyPressed(Keys.R)) enteredText += "R";
                    if (KeyPressed(Keys.S)) enteredText += "S";
                    if (KeyPressed(Keys.T)) enteredText += "T";
                    if (KeyPressed(Keys.U)) enteredText += "U";
                    if (KeyPressed(Keys.V)) enteredText += "V";
                    if (KeyPressed(Keys.W)) enteredText += "W";
                    if (KeyPressed(Keys.X)) enteredText += "X";
                    if (KeyPressed(Keys.Y)) enteredText += "Y";
                    if (KeyPressed(Keys.Z)) enteredText += "Z";
                    if (KeyPressed(Keys.NumPad0) || KeyPressed(Keys.D0)) enteredText += "0";
                    if (KeyPressed(Keys.NumPad1) || KeyPressed(Keys.D1)) enteredText += "1";
                    if (KeyPressed(Keys.NumPad2) || KeyPressed(Keys.D2)) enteredText += "2";
                    if (KeyPressed(Keys.NumPad3) || KeyPressed(Keys.D3)) enteredText += "3";
                    if (KeyPressed(Keys.NumPad4) || KeyPressed(Keys.D4)) enteredText += "4";
                    if (KeyPressed(Keys.NumPad5) || KeyPressed(Keys.D5)) enteredText += "5";
                    if (KeyPressed(Keys.NumPad6) || KeyPressed(Keys.D6)) enteredText += "6";
                    if (KeyPressed(Keys.NumPad7) || KeyPressed(Keys.D7)) enteredText += "7";
                    if (KeyPressed(Keys.NumPad8) || KeyPressed(Keys.D8)) enteredText += "8";
                    if (KeyPressed(Keys.NumPad9) || KeyPressed(Keys.D9)) enteredText += "9";
                    if (KeyPressed(Keys.Space)) enteredText += " ";
                    if (KeyPressed(Keys.Back))
                    {
                        if (enteredText.Length > 0) enteredText = enteredText.Substring(0, enteredText.Length - 1);
                    }
                    if (KeyPressed(Keys.Enter))
                    {
                        Menu.Confirm();
                    }
                    if (KeyPressed(Keys.Escape)) Menu.Cancel();
                    break;
                case InputMode.Notification:
                    if (KeyPressed(Buttons.Confirm) || KeyPressed(Buttons.Cancel)) Menu.ConfirmNotification();
                    break;
                case InputMode.YesNo:
                    if (KeyPressed(Buttons.CarefulConfirm)) Menu.ConfirmNotification();
                    if (KeyPressed(Buttons.CarefulCancel)) Menu.CancelNotification();
                    break;
            }

            if (KeyPressed(Keys.F) && inputMode != InputMode.Text)
            {
                VBXSE.SpriteEngine.ToggleFullscreen();
            }
        }

        public static void StartTextEntry()
        {
            enteredText = "";
            inputMode = InputMode.Text;
        }

        public static bool KeyPressed(Keys key)
        {
            if (!oldState.IsKeyDown(key) && newState.IsKeyDown(key))
            {
                if (inputMode == InputMode.Text)
                {
                    if (key != Keys.Enter && key != Keys.Escape) Audio.PlaySound("cursor");
                }
                return true;
            }
            else return false;
        }

        public enum Buttons
        {
            Up,
            Down,
            Left,
            Right,
            Confirm,
            Cancel,
            CarefulConfirm,
            CarefulCancel
        }

        public static bool KeyPressed(Buttons purpose)
        {
            switch (purpose)
            {
                case Buttons.Up:
                    return KeyPressed(Keys.Up) || KeyPressed(Keys.W);
                case Buttons.Down:
                    return KeyPressed(Keys.Down) || KeyPressed(Keys.S);
                case Buttons.Left:
                    return KeyPressed(Keys.Left) || KeyPressed(Keys.A);
                case Buttons.Right:
                    return KeyPressed(Keys.Right) || KeyPressed(Keys.D);
                case Buttons.Confirm:
                    return KeyPressed(Keys.Enter) || KeyPressed(Keys.Z) || KeyPressed(Keys.Space);
                case Buttons.CarefulConfirm:
                    return KeyPressed(Keys.Z) || KeyPressed(Keys.Y);
                case Buttons.Cancel:
                    return (KeyPressed(Keys.Escape) || KeyPressed(Keys.X) || KeyPressed(Keys.Back));
                case Buttons.CarefulCancel:
                    return (KeyPressed(Keys.Escape) || KeyPressed(Keys.X) || KeyPressed(Keys.Back) || KeyPressed(Keys.N));
            }
            return false;
        }
    }
}