using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Drawing.Text;
using System.Drawing.Drawing2D;
using FastReport.Utils;
using FastReport.Code;
using System.Windows.Forms;
using System.Drawing.Design;
using FastReport.Barcode.QRCode;

namespace FastReport.Barcode
{
    /// <summary>
    /// Represents a barcode object.
    /// Represents a barcode object.
    /// </summary>
    /// <remarks>
    /// The instance of this class represents a barcode. Here are some common
    /// actions that can be performed with this object:
    /// <list type="bullet">
    ///   <item>
    ///     <description>To select the type of barcode, use the <see cref="Barcode"/> property.
    ///     </description>
    ///   </item>
    ///   <item>
    ///     <description>To specify a static barcode data, use the <see cref="Text"/> property.
    ///       You also may use the <see cref="DataColumn"/> or <see cref="Expression"/> properties
    ///       to specify dynamic value for a barcode.
    ///     </description>
    ///   </item>
    ///   <item>
    ///     <description>To set a barcode orientation, use the <see cref="Angle"/> property.
    ///     </description>
    ///   </item>
    ///   <item>
    ///     <description>To specify the size of barcode, set the <see cref="AutoSize"/> property
    ///       to <b>true</b> and use the <see cref="Zoom"/> property to zoom the barcode.
    ///       If <see cref="AutoSize"/> property is set to <b>false</b>, you need to specify the
    ///       size using the <see cref="ComponentBase.Width">Width</see> and
    ///       <see cref="ComponentBase.Height">Height</see> properties.
    ///     </description>
    ///   </item>
    /// </list>
    /// </remarks>
    /// <example>This example shows how to configure the BarcodeObject to display PDF417 barcode.
    /// <code>
    /// BarcodeObject barcode;
    /// ...
    /// barcode.Barcode = new BarcodePDF417();
    /// (barcode.Barcode as BarcodePDF417).CompactionMode = CompactionMode.Text;
    /// </code>
    /// </example>
    public partial class BarcodeObject : ReportComponentBase
    {
        /// <summary>
        /// Specifies the horizontal alignment of a Barcode object. Works only when autosize is on.
        /// </summary>
        public enum Alignment
        {
            /// <summary>
            /// Specifies that the barcode is aligned to the left of the original layout.
            /// </summary>
            Left,

            /// <summary>
            /// Specifies that the barcode is aligned to the center of the original layout.
            /// </summary>
            Center,

            /// <summary>
            /// Specifies that the barcode is aligned to the right of the original layout.
            /// </summary>
            Right
        }


        #region Fields
        private int angle;
        private bool autoSize;
        private BarcodeBase barcode;
        private string dataColumn;
        private string expression;
        private string text;
        private bool showText;
        private Padding padding;
        private float zoom;
        private bool hideIfNoData;
        private string noDataText;
        private string brackets;
        private bool allowExpressions;
        private string savedText;
        private bool asBitmap;
        private Alignment horzAlign;
        private RectangleF origRect;
        #endregion

        #region Properties
        /// <summary>
        /// Gets or sets the barcode type.
        /// </summary>
        [Category("Appearance")]
        [Editor("FastReport.TypeEditors.BarcodeEditor, FastReport", typeof(UITypeEditor))]
        public BarcodeBase Barcode
        {
            get { return barcode; }
            set
            {
                if (value == null)
                    value = new Barcode39();
                barcode = value;
            }
        }

        /// <summary>
        /// Gets or sets the horizontal alignment of a Barcode object.
        /// </summary>
        [DefaultValue(Alignment.Left)]
        [Category("Appearance")]
        public Alignment HorzAlign
        {
            get { return horzAlign; }
            set { horzAlign = value; }
        }

        /// <summary>
        /// Gets or sets the symbology name.
        /// </summary>
        /// <remarks>
        /// The following symbology names are supported:
        /// <list type="bullet">
        ///   <item><description>"2/5 Interleaved"</description></item>
        ///   <item><description>"2/5 Industrial"</description></item>
        ///   <item><description>"2/5 Matrix"</description></item>
        ///   <item><description>"Codabar"</description></item>
        ///   <item><description>"Code128"</description></item>
        ///   <item><description>"Code39"</description></item>
        ///   <item><description>"Code39 Extended"</description></item>
        ///   <item><description>"Code93"</description></item>
        ///   <item><description>"Code93 Extended"</description></item>
        ///   <item><description>"EAN8"</description></item>
        ///   <item><description>"EAN13"</description></item>
        ///   <item><description>"MSI"</description></item>
        ///   <item><description>"PostNet"</description></item>
        ///   <item><description>"UPC-A"</description></item>
        ///   <item><description>"UPC-E0"</description></item>
        ///   <item><description>"UPC-E1"</description></item>
        ///   <item><description>"Supplement 2"</description></item>
        ///   <item><description>"Supplement 5"</description></item>
        ///   <item><description>"PDF417"</description></item>
        ///   <item><description>"Datamatrix"</description></item>
        ///   <item><description>"QRCode"</description></item>
        /// </list>
        /// </remarks>
        /// <example>
        /// <code>
        /// barcode.SymbologyName = "PDF417";
        /// (barcode.Barcode as BarcodePDF417).CompactionMode = CompactionMode.Text;
        /// </code>
        /// </example>
        [Browsable(false)]
        public string SymbologyName
        {
            get
            {
                return Barcode.Name;
            }
            set
            {
                if (SymbologyName != value)
                {
                    Type bartype = Barcodes.GetType(value);
                    Barcode = Activator.CreateInstance(bartype) as BarcodeBase;
                    Text = barcode.GetDefaultValue();
                }
            }
        }

        /// <summary>
        /// Gets or sets the angle of barcode, in degrees.
        /// </summary>
        [DefaultValue(0)]
        [Category("Appearance")]
        public int Angle
        {
            get { return angle; }
            set { angle = value; }
        }

        /// <summary>
        /// Gets or sets a value that determines whether the barcode should handle its width automatically.
        /// </summary>
        [DefaultValue(true)]
        [Category("Behavior")]
        public bool AutoSize
        {
            get { return autoSize; }
            set { autoSize = value; }
        }

        /// <summary>
        /// Gets or sets a data column name bound to this control.
        /// </summary>
        /// <remarks>
        /// Value must be in the form "Datasource.Column".
        /// </remarks>
        [Category("Data")]
        [Editor("FastReport.TypeEditors.DataColumnEditor, FastReport", typeof(UITypeEditor))]
        public string DataColumn
        {
            get { return dataColumn; }
            set { dataColumn = value; }
        }

        /// <summary>
        /// Gets or sets an expression that contains the barcode data.
        /// </summary>
        [Category("Data")]
        [Editor("FastReport.TypeEditors.ExpressionEditor, FastReport", typeof(UITypeEditor))]
        public string Expression
        {
            get { return expression; }
            set { expression = value; }
        }

        /// <summary>
        /// Enable or disable of using an expression in Text
        /// </summary>
        [Category("Data")]
        [DefaultValue(false)]
        public bool AllowExpressions
        {
            get { return allowExpressions; }
            set { allowExpressions = value; }
        }

        /// <summary>
        /// Gets or sets brackets for using in expressions
        /// </summary>
        [Category("Data")]
        public string Brackets
        {
            get { return brackets; }
            set { brackets = value; }
        }

        /// <summary>
        /// Gets or sets a value that indicates if the barcode should display a human-readable text.
        /// </summary>
        [DefaultValue(true)]
        [Category("Behavior")]
        public bool ShowText
        {
            get { return showText; }
            set { showText = value; }
        }

        /// <summary>
        /// Gets or sets the barcode data.
        /// </summary>
        [Category("Data")]
        [Editor("FastReport.TypeEditors.ExpressionEditor, FastReport", typeof(UITypeEditor))]
        public string Text
        {
            get { return text; }
            set { text = value; }
        }

        /// <summary>
        /// Gets or sets padding within the BarcodeObject.
        /// </summary>
        [Category("Layout")]
        public Padding Padding
        {
            get { return padding; }
            set { padding = value; }
        }

        /// <summary>
        /// Gets or sets a zoom of the barcode.
        /// </summary>
        [DefaultValue(1f)]
        [Category("Appearance")]
        public float Zoom
        {
            get { return zoom; }
            set { zoom = value; }
        }

        /// <summary>
        /// Gets or sets a value that determines whether it is necessary to hide the object if the
        /// barcode data is empty.
        /// </summary>
        [DefaultValue(true)]
        [Category("Behavior")]
        public bool HideIfNoData
        {
            get { return hideIfNoData; }
            set { hideIfNoData = value; }
        }

        /// <summary>
        /// Gets or sets the text that will be displayed if the barcode data is empty.
        /// </summary>
        [Category("Data")]
        public string NoDataText
        {
            get { return noDataText; }
            set { noDataText = value; }
        }

        /// <summary>
        /// Gets or sets values for forced use of a bitmap image instead of a vector
        /// </summary>
        [Category("Appearance")]
        [DefaultValue(false)]
        public bool AsBitmap
        {
            get { return asBitmap; }
            set { asBitmap = value; }
        }
        #endregion

        #region Private Methods
        private void SetBarcodeProperties()
        {
            barcode.Initialize(Text, ShowText, Angle, Zoom);
        }

        private void DrawBarcode(FRPaintEventArgs e)
        {
            RectangleF displayRect = new RectangleF(
              (AbsLeft + Padding.Left) * e.ScaleX,
              (AbsTop + Padding.Top) * e.ScaleY,
              (Width - Padding.Horizontal) * e.ScaleX,
              (Height - Padding.Vertical) * e.ScaleY);

            IGraphics g = e.Graphics;
            IGraphicsState state = g.Save();
            try
            {
                Report report = Report;
                if (report != null)
                {
                    if (report.SmoothGraphics)
                    {
                        g.InterpolationMode = InterpolationMode.HighQualityBicubic;
                        g.SmoothingMode = SmoothingMode.AntiAlias;
                    }
                    g.TextRenderingHint = report.GetTextQuality();
                }
                barcode.DrawBarcode(g, displayRect);
            }
            finally
            {
                g.Restore(state);
            }
        }

        #endregion

        #region Public Methods

        /// <summary>
        /// Initialize current BarcodeObject as Swiss QR.
        /// </summary>
        /// <param name="parameters">Parameters of swiss qr.</param>
        public void CreateSwissQR(QRSwissParameters parameters)
        {
            QRSwiss swiss = new QRSwiss(parameters);
            this.Barcode = new BarcodeQR();
            Barcode.text = swiss.Pack();
            this.Text = swiss.Pack();
            this.ShowText = false;
        }

        public void UpdateAutoSize()
        {
            SetBarcodeProperties();
            SizeF size = Barcode.CalcBounds();
            size.Width *= Zoom;
            size.Height *= Zoom;
            if (AutoSize)
            {
                if (Angle == 0 || Angle == 180)
                {
                    Width = size.Width + Padding.Horizontal;
                    if (size.Height > 0)
                        Height = size.Height + Padding.Vertical;
                }
                else if (Angle == 90 || Angle == 270)
                {
                    Height = size.Width + Padding.Vertical;
                    if (size.Height > 0)
                        Width = size.Height + Padding.Horizontal;
                }
                RelocateAlign();
            }
        }

        /// <summary>
        /// Relocate BarcodeObject based on alignment
        /// </summary>
        public void RelocateAlign()
        {
            if (HorzAlign == Alignment.Left || origRect == RectangleF.Empty)
                return;
            switch( HorzAlign)
            {
                case Alignment.Center:
                    {
                        this.Left = origRect.Left + (origRect.Width / 2) - this.Width / 2;
                        break;
                    }
                case Alignment.Right:
                    {
                        this.Left = origRect.Right - this.Width;
                        break;
                    }
            }
            origRect = RectangleF.Empty;
        }

        /// <inheritdoc/>
        public override void Assign(Base source)
        {
            base.Assign(source);

            BarcodeObject src = source as BarcodeObject;
            Barcode = src.Barcode.Clone();
            Angle = src.Angle;
            AutoSize = src.AutoSize;
            DataColumn = src.DataColumn;
            Expression = src.Expression;
            Text = src.Text;
            ShowText = src.ShowText;
            Padding = src.Padding;
            Zoom = src.Zoom;
            HideIfNoData = src.HideIfNoData;
            NoDataText = src.NoDataText;
            Brackets = src.Brackets;
            AllowExpressions = src.AllowExpressions;
            AsBitmap = src.AsBitmap;
            HorzAlign = src.HorzAlign;
        }

        /// <inheritdoc/>
        public override void Draw(FRPaintEventArgs e)
        {
            bool error = false;
            string errorText = "";

            if (String.IsNullOrEmpty(Text))
            {
                error = true;
                errorText = NoDataText;
            }
            else
            {
                try
                {
                    UpdateAutoSize();
                }
                catch (Exception ex)
                {
                    error = true;
                    errorText = ex.Message;
                }
            }

            base.Draw(e);
            if (!error)
            {
                DrawBarcode(e);
            }
            else
            {
                if (IsDesigning && text.StartsWith(Brackets.Split(',')[0]) && Text.EndsWith(Brackets.Split(',')[1]))
                {
                    try
                    {
                        barcode.text = barcode.GetDefaultValue();
                        DrawBarcode(e);
                        error = false;
                    }
                    catch
                    {
                        error = true;
                    }
                }

                if (error)
                    e.Graphics.DrawString(errorText, DrawUtils.DefaultReportFont, Brushes.Red,
                        new RectangleF(AbsLeft * e.ScaleX, AbsTop * e.ScaleY, Width * e.ScaleX, Height * e.ScaleY));
            }
            DrawMarkers(e);
            Border.Draw(e, new RectangleF(AbsLeft, AbsTop, Width, Height));
        }

        /// <inheritdoc/>
        public override void Serialize(FRWriter writer)
        {
            BarcodeObject c = writer.DiffObject as BarcodeObject;
            base.Serialize(writer);

            if (Angle != c.Angle)
                writer.WriteInt("Angle", Angle);
            if (AutoSize != c.AutoSize)
                writer.WriteBool("AutoSize", AutoSize);
            if (DataColumn != c.DataColumn)
                writer.WriteStr("DataColumn", DataColumn);
            if (Expression != c.Expression)
                writer.WriteStr("Expression", Expression);
            if (Text != c.Text)
                writer.WriteStr("Text", Text);
            if (ShowText != c.ShowText)
                writer.WriteBool("ShowText", ShowText);
            if (Padding != c.Padding)
                writer.WriteValue("Padding", Padding);
            if (Zoom != c.Zoom)
                writer.WriteFloat("Zoom", Zoom);
            if (HideIfNoData != c.HideIfNoData)
                writer.WriteBool("HideIfNoData", HideIfNoData);
            if (NoDataText != c.NoDataText)
                writer.WriteStr("NoDataText", NoDataText);
            if (AllowExpressions != c.AllowExpressions)
                writer.WriteBool("AllowExpressions", AllowExpressions);
            if (Brackets != c.Brackets)
                writer.WriteStr("Brackets", Brackets);
            if (AsBitmap != c.AsBitmap)
                writer.WriteBool("AsBitmap", AsBitmap);
            if (HorzAlign != c.HorzAlign)
                writer.WriteValue("HorzAlign", HorzAlign);
            Barcode.Serialize(writer, "Barcode.", c.Barcode);
        }

        #endregion

        #region Report Engine
        /// <inheritdoc/>
        public override string[] GetExpressions()
        {
            List<string> expressions = new List<string>();
            expressions.AddRange(base.GetExpressions());

            if (!String.IsNullOrEmpty(DataColumn))
                expressions.Add(DataColumn);
            if (!String.IsNullOrEmpty(Expression))
                expressions.Add(Expression);
            else
            {
                if (AllowExpressions && !String.IsNullOrEmpty(Brackets))
                {
                    string[] brackets = Brackets.Split(',');
                    // collect expressions found in the text
                    expressions.AddRange(CodeUtils.GetExpressions(Text, brackets[0], brackets[1]));
                }
            }
            return expressions.ToArray();
        }

        /// <inheritdoc/>
        public override void SaveState()
        {
            base.SaveState();
            savedText = Text;
        }

        /// <inheritdoc/>
        public override void RestoreState()
        {
            base.RestoreState();
            Text = savedText;
        }

        /// <inheritdoc/>
        public override void GetData()
        {
            base.GetData();
            if (!String.IsNullOrEmpty(DataColumn))
            {
                object value = Report.GetColumnValue(DataColumn);
                Text = value == null ? "" : value.ToString();
            }
            else if (!String.IsNullOrEmpty(Expression))
            {
                object value = Report.Calc(Expression);
                Text = value == null ? "" : value.ToString();
            }
            else
            {
                // process expressions
                if (AllowExpressions && !String.IsNullOrEmpty(this.brackets))
                {
                    string[] bracket_arr = this.brackets.Split(',');
                    FindTextArgs args = new FindTextArgs();
                    args.Text = new FastString(Text);
                    args.OpenBracket = bracket_arr[0];
                    args.CloseBracket = bracket_arr[1];
                    int expressionIndex = 0;
                    while (args.StartIndex < args.Text.Length)
                    {
                        string expression = CodeUtils.GetExpression(args, false);
                        if (expression == null)
                            break;

                        string value = Report.Calc(expression).ToString();
                        args.Text = args.Text.Remove(args.StartIndex, args.EndIndex - args.StartIndex);
                        args.Text = args.Text.Insert(args.StartIndex, value);
                        args.StartIndex += value.Length;
                        expressionIndex++;
                    }
                    Text = args.Text.ToString();
                }
            }

            if (Visible)
                Visible = !String.IsNullOrEmpty(Text) || !HideIfNoData;
            if (Visible)
            {
                try
                {
                    origRect = this.Bounds;
                    UpdateAutoSize();
                }
                catch
                {
                }
            }
        }
        #endregion

        /// <summary>
        /// Initializes a new instance of the <see cref="BarcodeObject"/> class with default settings.
        /// </summary>
        public BarcodeObject()
        {
            Barcode = new Barcode39();
            AutoSize = true;
            DataColumn = "";
            Expression = "";
            Text = Barcode.GetDefaultValue();
            ShowText = true;
            Padding = new Padding();
            Zoom = 1;
            HideIfNoData = true;
            NoDataText = "";
            AllowExpressions = false;
            Brackets = "[,]";
            SetFlags(Flags.HasSmartTag, true);
        }

    }


    internal static class Barcodes
    {
#if READONLY_STRUCTS
        internal readonly struct BarcodeItem
#else
        internal struct BarcodeItem
#endif
        {
            public readonly Type objType;
            public readonly string barcodeName;

            public BarcodeItem(Type objType, string barcodeName)
            {
                this.objType = objType;
                this.barcodeName = barcodeName;
            }
        }

        public readonly static BarcodeItem[] Items = {
            new BarcodeItem(typeof(Barcode2of5Interleaved), "2/5 Interleaved"),
            new BarcodeItem(typeof(Barcode2of5Industrial), "2/5 Industrial"),
            new BarcodeItem(typeof(Barcode2of5Matrix), "2/5 Matrix"),
            new BarcodeItem(typeof(BarcodeDeutscheIdentcode), "Deutsche Identcode"),
            new BarcodeItem(typeof(BarcodeDeutscheLeitcode),"Deutshe Leitcode"),
            new BarcodeItem(typeof(BarcodeITF14), "ITF-14"),
            new BarcodeItem(typeof(BarcodeCodabar), "Codabar"),
            new BarcodeItem(typeof(Barcode128), "Code128"),
            new BarcodeItem(typeof(Barcode39), "Code39"),
            new BarcodeItem(typeof(Barcode39Extended), "Code39 Extended"),
            new BarcodeItem(typeof(Barcode93), "Code93"),
            new BarcodeItem(typeof(Barcode93Extended), "Code93 Extended"),
            new BarcodeItem(typeof(BarcodeEAN8), "EAN8"),
            new BarcodeItem(typeof(BarcodeEAN13), "EAN13"),
            new BarcodeItem(typeof(BarcodeMSI), "MSI"),
            new BarcodeItem(typeof(BarcodePostNet), "PostNet"),
            new BarcodeItem(typeof(BarcodeJapanPost4StateCode), "Japan Post 4 State Code"),
            new BarcodeItem(typeof(BarcodeUPC_A), "UPC-A"),
            new BarcodeItem(typeof(BarcodeUPC_E0), "UPC-E0"),
            new BarcodeItem(typeof(BarcodeUPC_E1), "UPC-E1"),
            new BarcodeItem(typeof(BarcodeSupplement2), "Supplement 2"),
            new BarcodeItem(typeof(BarcodeSupplement5), "Supplement 5"),
            new BarcodeItem(typeof(BarcodePDF417), "PDF417"),
            new BarcodeItem(typeof(BarcodeDatamatrix), "Datamatrix"),
            new BarcodeItem(typeof(BarcodeQR), "QR Code"),
            new BarcodeItem(typeof(BarcodeAztec), "Aztec"),
            new BarcodeItem(typeof(BarcodePlessey), "Plessey"),
            new BarcodeItem(typeof(BarcodeEAN128), "GS1-128 (UCC/EAN-128)"),
            new BarcodeItem(typeof(BarcodeGS1Omnidirectional), "GS1 DataBar Omnidirectional"),
            new BarcodeItem(typeof(BarcodeGS1Limited), "GS1 DataBar Limited"),
            new BarcodeItem(typeof(BarcodeGS1Stacked), "GS1 DataBar Stacked"),
            new BarcodeItem(typeof(BarcodeGS1StackedOmnidirectional), "GS1 DataBar Stacked Omnidirectional"),
            new BarcodeItem(typeof(BarcodePharmacode), "Pharmacode"),
            new BarcodeItem(typeof(BarcodeIntelligentMail), "Intelligent Mail (USPS)"),
            new BarcodeItem(typeof(BarcodeMaxiCode), "MaxiCode")
        };

        public static string GetName(Type type)
        {
            foreach (BarcodeItem item in Items)
            {
                if (item.objType == type)
                    return item.barcodeName;
            }
            return "";
        }

        public static Type GetType(string name)
        {
            foreach (BarcodeItem item in Items)
            {
                if (item.barcodeName == name)
                    return item.objType;
            }
            return null;
        }

        public static string[] GetDisplayNames()
        {
            List<string> result = new List<string>();
            MyRes res = new MyRes("ComponentMenu,Barcode,Barcodes");
            for (int i = 0; i < Items.Length; i++)
            {
                result.Add(res.Get("Barcode" + i.ToString()));
            }
            return result.ToArray();
        }

        public static string[] GetSymbologyNames()
        {
            List<string> result = new List<string>();
            foreach (BarcodeItem item in Items)
            {
                result.Add(item.barcodeName);
            }

            return result.ToArray();

        }
    }
}