using System;
using SlimDX.DirectInput;

namespace BizHawk.MultiClient
{
    public static class Input
    {
        public static void Initialize()
        {
            KeyInput.Initialize();
            GamePad.Initialize();
        }

        public static void Update()
        {
            KeyInput.Update();
            GamePad.UpdateAll();
        }

        public static bool IsPressed(string control)
        {
            string[] controls = control.Split('+');
            for (int i=0; i<controls.Length; i++)
            {
                if (IsPressedSingle(controls[i]) == false)
                    return false;
            }
            return true;
        }

        private static bool IsPressedSingle(string control)
        {
            if (string.IsNullOrEmpty(control))
                return false;

            if (control.StartsWith("J1 ")) return GetGamePad(0, control.Substring(3));
            if (control.StartsWith("J2 ")) return GetGamePad(1, control.Substring(3));
            if (control.StartsWith("J3 ")) return GetGamePad(2, control.Substring(3));
            if (control.StartsWith("J4 ")) return GetGamePad(3, control.Substring(3));

            Key k = (Key) Enum.Parse(typeof(Key), control, true);
            return KeyInput.IsPressed(k);
        }

        private static bool GetGamePad(int index, string control)
        {
            if (index >= GamePad.Devices.Count) 
                return false;

            if (control == "Up") return GamePad.Devices[index].Up;
            if (control == "Down") return GamePad.Devices[index].Down;
            if (control == "Left") return GamePad.Devices[index].Left;
            if (control == "Right") return GamePad.Devices[index].Right;

            if (control.StartsWith("B"))
            {
                int buttonIndex = int.Parse(control.Substring(1)) - 1;
                if (buttonIndex >= GamePad.Devices[index].Buttons.Length)
                    return false;
                return GamePad.Devices[index].Buttons[buttonIndex];
            }

            return false;
        }

        public static string GetPressedKey()
        {
            //for (int j = 0; j < GamePad.Devices.Count; j++)
                return null;
        }
    }
}