using System;
using System.Windows.Forms;

namespace Sample
{
    public partial class NonRandomAccessSettingPanel : UserControl
    {
        #region Enums

        /// <summary>
        /// VT data type
        /// </summary>
        public enum BitVTDataTypes
        {
            /// <summary>
            /// VT_BOOL
            /// </summary>
            BOOL,
            /// <summary>
            /// VT_I1
            /// </summary>
            I1,
            /// <summary>
            /// VT_UI1
            /// </summary>
            UI1,
            /// <summary>
            /// VT_I2
            /// </summary>
            I2,
            /// <summary>
            /// VT_UI2
            /// </summary>
            UI2,
            /// <summary>
            /// VT_I4
            /// </summary>
            I4,
            /// <summary>
            /// VT_UI4
            /// </summary>
            UI4,
            /// <summary>
            /// VT_I8
            /// </summary>
            I8,
            /// <summary>
            /// VT_UI8
            /// </summary>
            UI8,
            /// <summary>
            /// VT_R4
            /// </summary>
            R4,
            /// <summary>
            /// VT_R8
            /// </summary>
            R8,
        }

        #endregion

        #region Consts

        /// <summary>
        /// Maximum address number when offset is selected at 16 bits
        /// </summary>
        private const UInt64 SIXTEEN_OFFSET_MAXADDRESSNO = 4095;

        /// <summary>
        /// Maximum address number at 16 bits
        /// </summary>
        private const UInt64 SIXTEEN_MAXADDRESSNO = 65535;

        /// <summary>
        /// Maximum address number when offset is selected at 32 bits
        /// </summary>
        private const UInt64 THIRTYTWO_OFFSET_MAXADDRESSNO = 268435455;

        /// <summary>
        /// Maximum address number at 32 bits
        /// </summary>
        private const UInt64 THIRTYTWO_MAXADDRESSNO = 4294967295;

        #endregion

        #region Feilds

        private bool isOffset = true;

        private bool isHex = false;

        private Bits currentBit = Bits.SixteenBit; 

        #endregion

        #region Constructor

        /// <summary>
        /// Constructor
        /// </summary>
        public NonRandomAccessSettingPanel()
        {
            InitializeComponent();

            this.dataTypeComboBox.DataSource = Enum.GetValues(typeof(DataTypes));
            this.vtDataTypeComboBox.DataSource = Enum.GetValues(typeof(BitVTDataTypes));
            this.UpdateRegisterInfo(Bits.SixteenBit);
            this.UpdateHexDecimal();
            this.UpdateVTDataType();
            this.UpdateCodePageVisible();
        }

        #endregion

        #region Event

        /// <summary>
        /// When the data type selection is changed
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void dataTypeComboBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (((DataTypes)this.dataTypeComboBox.SelectedValue) == DataTypes.B)
            {
                this.vtDataTypeComboBox.DataSource = Enum.GetValues(typeof(BitVTDataTypes));
            }
            else
            {
                this.vtDataTypeComboBox.DataSource = Enum.GetValues(typeof(VTDataTypes));
            }
            this.UpdateOffset();
            this.UpdateMaxAddressNo();
            this.UpdateVTDataType();
        }

        /// <summary>
        /// When the register type selection is changed
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void registerTypeComboBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            this.UpdateHexDecimal();
        }

        /// <summary>
        /// When the number of elements is changed
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void elemNumericUpDown_ValueChanged(object sender, EventArgs e)
        {
            if (this.elemNumericUpDown.Value > 1)
            {
                this.arrayCheckBox.Checked = true;
                this.arrayCheckBox.Enabled = false;
            }
            else
            {
                this.arrayCheckBox.Checked = false;
                this.arrayCheckBox.Enabled = true;
            }
        }

        /// <summary>
        /// When the VT data type is changed
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void vtDataTypeComboBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            this.UpdateCodePageVisible();
        }

        #endregion

        #region Methods

        /// <summary>
        /// Get option string
        /// </summary>
        /// <returns>Option string</returns>
        public String GetOptionString()
        {
            String optionString = String.Empty;
            String addressNoString = String.Empty;
            String referenceString = String.Empty;

            if (isHex)
            {
                addressNoString = String.Format("{0:X}" , Convert.ToUInt64(this.addressNoNumericUpDown.Value));
            }
            else
            {
                addressNoString = this.addressNoNumericUpDown.Value.ToString();
            }

            if (isOffset)
            {
                referenceString = String.Format("Reference={0}{1}{2}{3:X}", 
                                                this.registerTypeComboBox.SelectedValue.ToString(),
                                                this.dataTypeComboBox.SelectedValue.ToString(),
                                                addressNoString,
                                                Convert.ToInt16(this.offsetNumericUpDown.Value));
            }
            else
            {
                referenceString = String.Format("Reference={0}{1}{2}",
                                                this.registerTypeComboBox.SelectedValue.ToString(),
                                                this.dataTypeComboBox.SelectedValue.ToString(),
                                                addressNoString);
            }

            optionString = String.Format("{0},Elem={1},VT={2},Array={3},Codepage={4}",
                                        referenceString,
                                        this.elemNumericUpDown.Value,
                                        this.vtDataTypeComboBox.SelectedValue.ToString(),
                                        this.arrayCheckBox.Checked,
                                        Convert.ToUInt32(this.codePageNumericUpDown.Value));
            return optionString;
        }

        /// <summary>
        /// Number of array elements
        /// </summary>
        /// <returns></returns>
        public UInt64 GetElementCount()
        {
            return Convert.ToUInt64(this.elemNumericUpDown.Value);
        }

        /// <summary>
        /// Update register type according to address capacity
        /// </summary>
        /// <param name="bit">Address capacity</param>
        public void UpdateRegisterInfo(Bits bit)
        {
            this.currentBit = bit;
            if (this.currentBit == Bits.SixteenBit)
            {
                this.registerTypeComboBox.DataSource = Enum.GetValues(typeof(SixTeenRegisterTypes));
                this.UpdateMaxAddressNo();
            }
            else
            {
                this.registerTypeComboBox.DataSource = Enum.GetValues(typeof(ThirtyTwoRegisterTypes));
                this.UpdateMaxAddressNo();
            }
        }

        /// <summary>
        /// Update maximum address number
        /// </summary>
        /// <param name="bits"></param>
        private void UpdateMaxAddressNo()
        {
            if (this.currentBit == Bits.SixteenBit)
            {
                switch (this.dataTypeComboBox.SelectedValue)
                {
                    case DataTypes.B:
                        this.addressNoNumericUpDown.Maximum = SIXTEEN_OFFSET_MAXADDRESSNO;
                        break;
                    default:
                        this.addressNoNumericUpDown.Maximum = SIXTEEN_MAXADDRESSNO;
                        break;
                }
            }
            else
            {
                switch (this.dataTypeComboBox.SelectedValue)
                {
                    case DataTypes.B:
                        this.addressNoNumericUpDown.Maximum = THIRTYTWO_OFFSET_MAXADDRESSNO;
                        break;
                    default:
                        this.addressNoNumericUpDown.Maximum = THIRTYTWO_MAXADDRESSNO;
                        break;
                }
            }

        }

        /// <summary>
        /// Update VT data type according to data type
        /// </summary>
        private void UpdateVTDataType()
        {
            switch (this.dataTypeComboBox.SelectedValue)
            {
                case DataTypes.B:
                case DataTypes.W:
                    this.vtDataTypeComboBox.SelectedIndex = Convert.ToInt32(VTDataTypes.I2);
                    break;
                case DataTypes.L:
                    this.vtDataTypeComboBox.SelectedIndex = Convert.ToInt32(VTDataTypes.I4);
                    break;
                case DataTypes.Q:
                    this.vtDataTypeComboBox.SelectedIndex = Convert.ToInt32(VTDataTypes.I8);
                    break;
                case DataTypes.F:
                    this.vtDataTypeComboBox.SelectedIndex = Convert.ToInt32(VTDataTypes.R4);
                    break;
                case DataTypes.D:
                    this.vtDataTypeComboBox.SelectedIndex = Convert.ToInt32(VTDataTypes.R8);
                    break;
            }
        }

        /// <summary>
        /// Update VT data type according to data type
        /// </summary>
        private void UpdateOffset()
        {
            switch (this.dataTypeComboBox.SelectedValue)
            {
                case DataTypes.B:
                    this.isOffset = true;
                    this.offsetLabel.Visible = isOffset;
                    this.offsetNumericUpDown.Visible = isOffset;
                    break;
                default:
                    this.isOffset = false;
                    this.offsetLabel.Visible = isOffset;
                    this.offsetNumericUpDown.Visible = isOffset;
                    break;
            }
        }

        /// <summary>
        /// Update hexadecimal number of address number
        /// </summary>
        private void UpdateHexDecimal()
        {
            if (this.registerTypeComboBox.SelectedValue.GetType() == typeof(SixTeenRegisterTypes))
            {
                switch (this.registerTypeComboBox.SelectedValue)
                {
                    case SixTeenRegisterTypes.M:
                        this.isHex = false;
                        this.addressNoNumericUpDown.Hexadecimal = this.isHex;
                        break;
                    case SixTeenRegisterTypes.I:
                        this.isHex = true;
                        this.addressNoNumericUpDown.Hexadecimal = this.isHex;
                        break;
                }
            }
            else
            {
                switch (this.registerTypeComboBox.SelectedValue)
                {
                    case ThirtyTwoRegisterTypes.S:
                    case ThirtyTwoRegisterTypes.M:
                    case ThirtyTwoRegisterTypes.G:
                        this.isHex = false;
                        this.addressNoNumericUpDown.Hexadecimal = this.isHex;
                        break;
                    case ThirtyTwoRegisterTypes.I:
                    case ThirtyTwoRegisterTypes.O:
                        this.isHex = true;
                        this.addressNoNumericUpDown.Hexadecimal = this.isHex;
                        break;
                }
            }
        }

        /// <summary>
        /// Update code page display
        /// </summary>
        private void UpdateCodePageVisible()
        {
            if (this.vtDataTypeComboBox.DataSource.GetType() == typeof(VTDataTypes[]))
            {
                switch (this.vtDataTypeComboBox.SelectedValue)
                {
                    case VTDataTypes.BSTR:
                        this.codePageLabel.Visible = true;
                        this.codePageNumericUpDown.Visible = true;
                        break;
                    default:
                        this.codePageLabel.Visible = false;
                        this.codePageNumericUpDown.Visible = false;
                        break;
                }
            }
            else
            {
                this.codePageLabel.Visible = false;
                this.codePageNumericUpDown.Visible = false;
            }
        }

        /// <summary>
        /// Get number of elements
        /// </summary>
        /// <returns></returns>
        public int GetElemCount()
        {
            return Convert.ToInt32(this.elemNumericUpDown.Value);
        }

        /// <summary>
        /// Get VT data Types
        /// </summary>
        /// <returns></returns>
        public VTDataTypes GetVTDataType()
        {
            return (VTDataTypes)this.vtDataTypeComboBox.SelectedValue;
        }

        /// <summary>
        /// Get whether the data is an array
        /// </summary>
        /// <returns></returns>
        public bool GetIsArray()
        {
            return this.arrayCheckBox.Checked;
        } 

        #endregion
    }
}