// Kelsier project - Logging code (Logger.cs)
// Written by the Jobbig codeteam. <http://jobbig.eu/code/>
// Copyright 2013 John Runyon.
// 
// This file is part of the Kelsier project.
// 
// Kelsier is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
// 
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
//

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

namespace Kelsier.Common {
    public class Logger {
        public LogOutput[] debugs { get; private set; }
        public LogOutput[] infos { get; private set; }
        public LogOutput[] errors { get; private set; }
        public string from { get; private set; }

        /// <summary>
        /// Construct a Logger, writing to the specified TextWriter objects. Use an empty array to disable an output.
        /// </summary>
        /// <param name="debugs">Array of TextWriter's to use for debug output</param>
        /// <param name="infos">...for info output</param>
        /// <param name="errors">...for error output</param>
        public Logger(string from, LogOutput[] debugs, LogOutput[] infos, LogOutput[] errors) {
            int fromid;
            if (Int32.TryParse(from, out fromid)) {
                this.from = fromid.ToString("0000");
            } else {
                this.from = from;
            }

            this.debugs = debugs;
            this.infos = infos;
            this.errors = errors;

            if (from == "Root") {
                this.debug("Starting Root logging (debug) here at "+DateTime.Now.ToString("F"));
                this.info("Starting Root logging (info) here at "+DateTime.Now.ToString("F"));
                this.error("Starting Root logging (error) here at "+DateTime.Now.ToString("F"));
            }
        }
        public Logger(string from, Logger copy) {
            this.from = from;

            this.debugs = copy.debugs;
            this.infos = copy.infos;
            this.errors = copy.infos;
        }

        /// <summary>
        /// Debug logging.
        /// </summary>
        /// <param name="msg">Log message (with formatting placeholders, if desired)</param>
        /// <param name="args">Formatting replacements.</param>
        public void debug(object msg) {
            foreach (LogOutput outw in debugs) {
                if (outw.open)
                    outw.writer.WriteLine("(D@" + DateTime.Now.ToString("HH:mm:ss") + ")[" + from + "] " + msg.ToString());
            }
        }

        /// <summary>
        /// Info logging.
        /// </summary>
        /// <param name="msg">Log message (with formatting placeholders, if desired)</param>
        /// <param name="args">Formatting replacements.</param>
        public void info(object msg) {
            foreach (LogOutput outw in infos) {
                if (outw.open)
                    outw.writer.WriteLine("(I@" + DateTime.Now.ToString("HH:mm:ss") + ")[" + from + "] " + msg.ToString());
            }
        }

        /// <summary>
        /// Error logging.
        /// </summary>
        /// <param name="msg">Log message (with formatting placeholders, if desired)</param>
        /// <param name="args">Formatting replacements.</param>
        public void error(object msg) {
            foreach (LogOutput outw in errors) {
                if (outw.open)
                    outw.writer.WriteLine("(E@" + DateTime.Now.ToString("HH:mm:ss") + ")[" + from + "] " + msg.ToString());
            }
        }
    }

    public class LogOutput {
        public TextWriter writer { get; private set; }
        public bool open;
        public LogOutput(TextWriter writer) {
            this.writer = writer;
            this.open = true;
        }
    }
}