using System.Collections.Generic;
using System.IO;
using System.Text;

namespace Chernobyl.TextWriters
{
    /// <summary>
    /// This class is used to write text to
    /// several TextWriter's at once or treat several
    /// TextWrite as one.
    /// </summary>
    public class TextWriterCollection : TextWriter
    {
        /// <summary>
        /// Constructor.
        /// </summary>
        /// <param name="textWriters">The TextWriters to write to.</param>
        public TextWriterCollection(params TextWriter[] textWriters)
        {
            TextWriters = new List<TextWriter>();
            TextWriters.AddRange(textWriters);
        }

        /// <summary>
        /// Writes a line of text out to the contained TextWriters.
        /// </summary>
        /// <param name="value">The string to write to the TextWriters.</param>
        public override void WriteLine(string value)
        {
            // append a newline and write the value out
            foreach(TextWriter tw in TextWriters)
                tw.WriteLine(value);
        }

        /// <summary>
        /// Writes the string to the contained TextWriters.
        /// </summary>
        /// <param name="value">The string to write to the TextWriters.</param>
        public override void Write(string value)
        {
            foreach(TextWriter tw in TextWriters)
                tw.Write(value);
        }

        /// <summary>
        /// When overridden in a derived class, returns the 
        /// <see cref="T:System.Text.Encoding"/> in which the output is written.
        /// </summary>
        /// <value>The encoding of the output.</value>
        /// <returns>The Encoding in which the output is written.</returns>
        public override Encoding Encoding
        {
            get { return Encoding.ASCII; }
        }

        List<TextWriter> TextWriters {get; set;}
    }
}