// <copyright file="RtfElement.cs" company="PlaceholderCompany">
// Copyright (c) PlaceholderCompany. All rights reserved.
// </copyright>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace UCDraw.RTF
{
    public class RtfElement
    {
        public static bool operator ==(RtfElement a, RtfElement b)
        {
            // If both are null, or both are same instance, return true.
            if (object.ReferenceEquals(a, b))
            {
                return true;
            }
            return a.Equals(b);
        }
        public static bool operator !=(RtfElement a, RtfElement b)
        {
            return !(a == b);
        }
    }
    /// <summary>
    /// 1abcde
    /// </summary>
    public class RtfValueElement : RtfElement
    {
        public static bool operator ==(RtfValueElement a, RtfValueElement b)
        {
            // If both are null, or both are same instance, return true.
            return a.Equals(b);
        }
        public static bool operator !=(RtfValueElement a, RtfValueElement b)
        {
            return !(a == b);
        }
        public RtfValueElement() { }
        public RtfValueElement(string data)
        {
            this.Data = data;
        }
        public string Data { get; set; }
        public override bool Equals(System.Object obj)
        {
            // If both are null, or both are same instance, return true.
            if (object.ReferenceEquals(this, obj))
            {
                return true;
            }
            // If parameter cannot be cast to RtfValueElement return false:
            RtfValueElement p = obj as RtfValueElement;
            if ((object)p == null)
            {
                return false;
            }

            // Return true if the fields match:
            return Data.Equals(p.Data);
        }
        /// <inheritdoc/>
        public override string ToString()
        {
            return $"{Data}";
        }
    }
    /// <summary>
    /// \ansi
    /// </summary>
    public class RtfControlElement : RtfElement
    {
        public override bool Equals(System.Object obj)
        {
            // If both are null, or both are same instance, return true.
            if (object.ReferenceEquals(this, obj))
            {
                return true;
            }
            // If parameter cannot be cast to RtfValueElement return false:
            RtfControlElement p = obj as RtfControlElement;
            if ((object)p == null)
            {
                return false;
            }
            // Return true if the fields match:
            return ControlWord.Equals(p.ControlWord);
        }
        public RtfControlElement() { }
        public RtfControlElement(string controlWord)
        {
            this.ControlWord = controlWord;
        }
        public string ControlWord { get; set; }

        /// <inheritdoc/>
        public override string ToString()
        {
            return $"\\{ControlWord}";
        }
    }

    /// <summary>
    /// \rtf1
    /// </summary>
    public class RtfControlNumElement : RtfControlElement
    {
        public override bool Equals(System.Object obj)
        {
            // If both are null, or both are same instance, return true.
            if (object.ReferenceEquals(this, obj))
            {
                return true;
            }
            // If parameter cannot be cast to RtfValueElement return false:
            RtfControlNumElement p = obj as RtfControlNumElement;
            if ((object)p == null)
            {
                return false;
            }
            // Return true if the fields match:
            return ControlWord.Equals(p.ControlWord) && Number == p.Number;
        }
        public RtfControlNumElement() { }
        public RtfControlNumElement(string control, int number)
        {
            this.ControlWord = control;
            this.Number = number;
        }
        public int Number { get; set; }

        /// <inheritdoc/>
        public override string ToString()
        {
            return $"\\{ControlWord}{Number}";
        }
    }
    /// <summary>
    /// \'b1  \'a8  \'cb  \'f7 \generator Riched20 10.0.19041
    /// </summary>
    public class RtfControlDataElement : RtfControlElement
    {
        public override bool Equals(System.Object obj)
        {
            // If both are null, or both are same instance, return true.
            if (object.ReferenceEquals(this, obj))
            {
                return true;
            }
            // If parameter cannot be cast to RtfValueElement return false:
            RtfControlDataElement p = obj as RtfControlDataElement;
            if ((object)p == null)
            {
                return false;
            }
            // Return true if the fields match:
            return ControlWord.Equals(p.ControlWord) && Data.Equals(p.Data);
        }
        public RtfControlDataElement() { }
        public RtfControlDataElement(string control, string data)
        {
            this.ControlWord = control;
            this.Data = data;
        }
        public string Data { get; set; }

        /// <inheritdoc/>
        public override string ToString()
        {
            return $"\\{ControlWord}{Data}";
        }
    }
    public class RtfControlSplitDataElement : RtfControlDataElement
    {
        public RtfControlSplitDataElement(string control, string data) : base(control, data) {; }
        public override string ToString()
        {
            return $"\\{ControlWord} {Data}";
        }
    }
    public class RtfWChar : RtfControlDataElement
    {
        public RtfWChar() { this.ControlWord = "'"; }
        public RtfWChar(char[] chars)
        {
            Chars = chars;
        }
        public RtfWChar(string chars) : this(chars.ToCharArray())
        {
        }
        private char[] chars;
        public char[] Chars
        {
            get
            {
                if (chars == null)
                {
                    chars = new char[2];
                }
                return chars;
            }
            set
            {
                if (chars == null)
                {
                    chars = new char[2];
                }
                chars[0] = value[0];
                chars[1] = value[1];
                this.ControlWord = "'";
                this.Data = $"{chars[0]}{chars[1]}";
            }
        }

        /// <inheritdoc/>
        public override string ToString()
        {
            if (Chars == null || Chars.Length < 2)
            {
                return string.Empty;
            }
            return $"\\'{chars[0]}{chars[1]}";
        }

    }
}