using System.Runtime.InteropServices;

namespace Ryujinx.HLE.HOS.Applets.SoftwareKeyboard
{
    /// <summary>
    /// A structure with configuration options of the software keyboard when starting a new input request in inline mode.
    /// </summary>
    [StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Unicode)]
    struct SoftwareKeyboardCalc
    {
        public const int InputTextLength = SoftwareKeyboardCalcEx.InputTextLength;

        public uint Unknown;

        /// <summary>
        /// The size of the Calc struct, as reported by the process communicating with the applet.
        /// </summary>
        public ushort Size;

        public byte Unknown1;
        public byte Unknown2;

        /// <summary>
        /// Configuration flags. Each bit in the bitfield enabled a different operation of the keyboard
        /// using the data provided with the Calc structure.
        /// </summary>
        public KeyboardCalcFlags Flags;

        /// <summary>
        /// The original parameters used when initializing the keyboard applet.
        /// Flag: 0x1
        /// </summary>
        public SoftwareKeyboardInitialize Initialize;

        /// <summary>
        /// The audio volume used by the sound effects of the keyboard.
        /// Flag: 0x2
        /// </summary>
        public float Volume;

        /// <summary>
        /// The initial position of the text cursor (caret) in the provided input text.
        /// Flag: 0x10
        /// </summary>
        public int CursorPos;

        /// <summary>
        /// Appearance configurations for the on-screen keyboard.
        /// </summary>
        public SoftwareKeyboardAppear Appear;

        /// <summary>
        /// The initial input text to be used by the software keyboard.
        /// Flag: 0x8
        /// </summary>
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = InputTextLength + 1)]
        public string InputText;

        /// <summary>
        /// When set, the strings communicated by software keyboard will be encoded as UTF-8 instead of UTF-16.
        /// Flag: 0x20
        /// </summary>
        [MarshalAs(UnmanagedType.I1)]
        public bool UseUtf8;

        public byte Unknown3;

        /// <summary>
        /// [5.0.0+] Enable the backspace key in the software keyboard.
        /// Flag: 0x8000
        /// </summary>
        [MarshalAs(UnmanagedType.I1)]
        public bool BackspaceEnabled;

        public short Unknown4;
        public byte Unknown5;

        /// <summary>
        /// Flag: 0x200
        /// </summary>
        [MarshalAs(UnmanagedType.I1)]
        public bool KeytopAsFloating;

        /// <summary>
        /// Flag: 0x100
        /// </summary>
        [MarshalAs(UnmanagedType.I1)]
        public bool FooterScalable;

        /// <summary>
        /// Flag: 0x100
        /// </summary>
        [MarshalAs(UnmanagedType.I1)]
        public bool AlphaEnabledInInputMode;

        /// <summary>
        /// Flag: 0x100
        /// </summary>
        public byte InputModeFadeType;

        /// <summary>
        /// When set, the software keyboard ignores touch input.
        /// Flag: 0x200
        /// </summary>
        [MarshalAs(UnmanagedType.I1)]
        public bool TouchDisabled;

        /// <summary>
        /// When set, the software keyboard ignores hardware keyboard commands.
        /// Flag: 0x800
        /// </summary>
        [MarshalAs(UnmanagedType.I1)]
        public bool HardwareKeyboardDisabled;

        public uint Unknown6;
        public uint Unknown7;

        /// <summary>
        /// Default value is 1.0.
        /// Flag: 0x200
        /// </summary>
        public float KeytopScale0;

        /// <summary>
        /// Default value is 1.0.
        /// Flag: 0x200
        /// </summary>
        public float KeytopScale1;

        public float KeytopTranslate0;
        public float KeytopTranslate1;

        /// <summary>
        /// Default value is 1.0.
        /// Flag: 0x100
        /// </summary>
        public float KeytopBgAlpha;

        /// <summary>
        /// Default value is 1.0.
        /// Flag: 0x100
        /// </summary>
        public float FooterBgAlpha;

        /// <summary>
        /// Default value is 1.0.
        /// Flag: 0x200
        /// </summary>
        public float BalloonScale;

        public float Unknown8;
        public uint Unknown9;
        public uint Unknown10;
        public uint Unknown11;

        /// <summary>
        /// [5.0.0+] Enable sound effect.
        /// Flag: Enable:  0x2000
        ///       Disable: 0x4000
        /// </summary>
        public byte SeGroup;

        /// <summary>
        /// [6.0.0+] Enables the Trigger field when Trigger is non-zero.
        /// </summary>
        public byte TriggerFlag;

        /// <summary>
        /// [6.0.0+] Always set to zero.
        /// </summary>
        public byte Trigger;

        public byte Padding;

        public SoftwareKeyboardCalcEx ToExtended()
        {
            SoftwareKeyboardCalcEx calc = new()
            {
                Unknown = Unknown,
                Size = Size,
                Unknown1 = Unknown1,
                Unknown2 = Unknown2,
                Flags = Flags,
                Initialize = Initialize,
                Volume = Volume,
                CursorPos = CursorPos,
                Appear = Appear.ToExtended(),
                InputText = InputText,
                UseUtf8 = UseUtf8,
                Unknown3 = Unknown3,
                BackspaceEnabled = BackspaceEnabled,
                Unknown4 = Unknown4,
                Unknown5 = Unknown5,
                KeytopAsFloating = KeytopAsFloating,
                FooterScalable = FooterScalable,
                AlphaEnabledInInputMode = AlphaEnabledInInputMode,
                InputModeFadeType = InputModeFadeType,
                TouchDisabled = TouchDisabled,
                HardwareKeyboardDisabled = HardwareKeyboardDisabled,
                Unknown6 = Unknown6,
                Unknown7 = Unknown7,
                KeytopScale0 = KeytopScale0,
                KeytopScale1 = KeytopScale1,
                KeytopTranslate0 = KeytopTranslate0,
                KeytopTranslate1 = KeytopTranslate1,
                KeytopBgAlpha = KeytopBgAlpha,
                FooterBgAlpha = FooterBgAlpha,
                BalloonScale = BalloonScale,
                Unknown8 = Unknown8,
                Unknown9 = Unknown9,
                Unknown10 = Unknown10,
                Unknown11 = Unknown11,
                SeGroup = SeGroup,
                TriggerFlag = TriggerFlag,
                Trigger = Trigger,
            };

            return calc;
        }
    }
}