using System;

namespace P4API
{
    /// <summary>
    /// A P4Callback class that populates a P4Recordset
    /// </summary>
    /// <remarks>
    /// 
    /// </remarks>
    public class P4RecordsetCallback : P4Callback
    {
        private P4BaseRecordSet _P4Result;

        // instance variable for the super class when this is created externally
        private P4RecordSet _P4ResultRecordset;

        internal P4RecordsetCallback(P4BaseRecordSet p4Result)
        {
            _P4Result = p4Result;
            _P4ResultRecordset = null;
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="P4RecordsetCallback"/> class.
        /// </summary>
        public P4RecordsetCallback()
        {
            _P4ResultRecordset = new P4RecordSet();
            _P4Result = _P4ResultRecordset;
        }

        /// <summary>
        /// Gets the recordset.
        /// </summary>
        /// <value>The recordset.</value>
        public P4RecordSet Recordset
        { 
            get 
            {
                return _P4ResultRecordset;
            } 
        }


        #region P4Callback Members

        /// <summary>
        /// Edits the specified f1.
        /// </summary>
        /// <param name="f1">The f1.</param>
        public override void Edit(System.IO.FileInfo f1)
        {
            throw new P4API.Exceptions.FormCommandException();
        }

        /// <summary>
        /// Prompts the specified MSG.
        /// </summary>
        /// <param name="msg">The MSG.</param>
        /// <param name="rsp">The RSP.</param>
        public override void Prompt(string msg, ref string rsp)
        {
            rsp = _P4Result.RaiseOnPromptEvent(msg);
        }

        /// <summary>
        /// Resolves the file.
        /// </summary>
        /// <param name="mergeData">The merge data.</param>
        /// <returns></returns>
        public override MergeAction ResolveFile(MergeData mergeData)
        {
            // don't handle a merge action here
            throw new Exceptions.MergeNotImplemented();
        }

        /// <summary>
        /// Finisheds this instance.
        /// </summary>
        public override void Finished()
        {
            _P4Result.SpecDef = base.SpecDef;
            _P4Result.Finished();
        }

        /// <summary>
        /// Outputs the info.
        /// </summary>
        /// <param name="data">The data.</param>
        public override void OutputInfo(string data)
        {
            _P4Result.AddInfo(data);
        }

        /// <summary>
        /// Cancels this instance.
        /// </summary>
        /// <returns></returns>
        public override bool Cancel()
        {
            return false;
        }

        /// <summary>
        /// Outputs the content.
        /// </summary>
        /// <param name="buffer">The buffer.</param>
        /// <param name="IsText">if set to <c>true</c> [is text].</param>
        public override void OutputContent(byte[] buffer, bool IsText)
        {
            if (IsText)
            {
                string data = base.ContentEncoding.GetString(buffer);
                _P4Result.AddInfo(data);
            }
            else
            {
                _P4Result.BinaryOutput = buffer;
            }
            
        }

        /// <summary>
        /// Inputs the data.
        /// </summary>
        /// <param name="buffer">The buffer.</param>
        public override void InputData(System.Text.StringBuilder buffer)
        {
            buffer.Append(_P4Result.InputData);
        }

        /// <summary>
        /// Outputs the record.
        /// </summary>
        /// <param name="record">The record.</param>
        public override void OutputRecord(P4Record record)
        {
            _P4Result.AddRecord(record);
        }

        /// <summary>
        /// Outputs the message.
        /// </summary>
        /// <param name="message">The message.</param>
        public override void OutputMessage(P4Message message)
        {
            _P4Result.AddP4Message(message);

            //Console.WriteLine("{0}: {1}", (int)message.Severity, message.Identity);
            switch (message.Severity)
            {
                case P4MessageSeverity.Empty: // E_EMPTY (0) | no error 
                    _P4Result.AddString(message.Format());
                    break;
                case P4MessageSeverity.Info: // E_INFO  (1) | information, not necessarily an error 
                    _P4Result.AddInfo(message.Format());
                    break;
                case P4MessageSeverity.Warning: // E_WARN  (2) | a minor error occurred 
                    _P4Result.AddWarning(message.Format());
                    break;
                case P4MessageSeverity.Failed: // E_FAILED(3) | the command was used incorrectly 
                    _P4Result.AddError(message.Format());
                    break;
                case P4MessageSeverity.Fatal: // E_FATAL (4) | fatal error, the command can't be processed 
                    _P4Result.AddError(message.Format());
                    break;
                default:
                    //TODO throw an error... unknown severity
                    break;
            }
        }

        #endregion
    }
}