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

namespace AniNIX.TheRaven {

    public static class RavenConfigure {

        /// <summary>
        /// Create a new list from the line-delimited entries in a file
        /// </summary>
        /// <param name=filename> the file to read </param>
        /// <returns> A List of Strings containing the lines.</returns>
        public static List<String> ReadLineDelimitedFile(String filename) {
            String line = null;
            int count = 0;
            //Read all the file to join.
            ReportMessage.Log(Verbosity.Verbose,String.Format("Reading {0}",filename)); //Path.GetFileName(filename)));
            List<String> newEntries = new List<String>();
            StreamReader fileReader = new StreamReader(filename);
            line = fileReader.ReadLine();
            while (line != null) {
                if (line.Length < 1) {
                    line = fileReader.ReadLine();
                    continue;
                }
                line = line.Trim();
                if (line[0] == '#') {
                    line = fileReader.ReadLine();
                    continue;
                } //Skip lines starting with a #
                String[] byHash = line.Split('#'); //Ignore everything after a #
                newEntries.Add(byHash[0]);
                count++;
                ReportMessage.Log(Verbosity.VeryVerbose,String.Format("Added entry {0} from {1}",line,Path.GetFileName(filename)));
                line = fileReader.ReadLine();
            } 
            fileReader.Close();
            ReportMessage.Log(Verbosity.VeryVerbose,String.Format("Found {0} newEntries.",newEntries.Count));
            return newEntries;
        }

        /// <summary>
        /// Get the String[] of lines in a file -- use this for random performance
        /// </summary>
        /// <param name=filename> the file to read </param>
        /// <returns> A String[] </returns>
        public static String[] ReadLineDelimitedFileToArr(String filename) {
            return RavenConfigure.ReadLineDelimitedFile(filename).ToArray();
        }

        /// <summary>
        /// Read the first line from a file -- this is useful for allowing configuration of single strings.
        /// </summary>
        /// <param name=filename> the file to read </param>
        /// <returns>The first line as a String</returns>
        public static String ReadFirstLineFromFile(String filename) {
            StreamReader fileReader = new StreamReader(filename);
            String readString = fileReader.ReadLine();
            fileReader.Close();
            return readString;
        }
    }
}