using CommunityToolkit.Mvvm.ComponentModel;
using System.Text;

namespace MultiTerm.Protocols.Model;

/// <summary>
/// A class that represents a Character and contains some additional information and methods.
/// A time can be stored in combination with this Character using the <see cref="Time"/> property. E.g. to represent arrived or sent time.
/// Several methods to display the Character in other formats than Unicode are provided.
/// </summary>
public partial class ExtendedChar
{
    /// <summary>
    /// Data in the form of a character. UTF-16 code unit.
    /// </summary>
    public char Character { get; set; }

    /// <summary>
    /// Time that is associated with the <see cref="Character"/>.
    /// E.g. to represent arrived or sent time.
    /// </summary>
    public TimeOnly Time { get; private set; }

    /// <summary>
    /// Creates an instance of ExtendedChar with a given <paramref name="character"/>.
    /// Sets <see cref="Time"/> to now.
    /// </summary>
    /// <param name="character">data</param>
    public ExtendedChar(char character) : this(character, TimeOnly.FromDateTime(DateTime.Now)) { }

    /// <summary>
    /// Creates an instance of ExtendedChar with a given <paramref name="character"/> and <paramref name="time"/>.
    /// Initializes string properties <see cref="StringUtf16"/>, <see cref="StringHex"/> and <see cref="StringBin"/>.
    /// </summary>
    /// <param name="character">data</param>
    /// <param name="time">time</param>
    public ExtendedChar(char character, TimeOnly time)
    {
        this.Character = character;
        this.Time = time;
    }

    public override string ToString()
    {
        return this.ToUtf16String();
    }

    public string ToUtf16String()
    {
        return this.Character.ToString();
    }

    public string ToHexString()
    {
        // extract bytes from utf16 character
        byte[] byteArray = Encoding.Unicode.GetBytes(this.ToUtf16String());  

        // convert to hexadecimal
        return Convert.ToHexString(byteArray); 
    }

    public string ToBinaryString()
    {
        // extract bytes from utf16 character
        byte[] byteArray = Encoding.Unicode.GetBytes(this.ToUtf16String());

        // foreach byte convert to binary and add to string
        string binaryString = String.Empty;
        foreach (byte b in byteArray)
        {
            binaryString += $"{Convert.ToString(b, 2)} ";
        }
        return binaryString;
    }
}