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

namespace VisualPascalABC
{
    public class CodeSampleManager
    {
        private Hashtable ht = new Hashtable();

        public CodeSampleManager()
        {
            try
            {
                StreamReader sr = File.OpenText(Path.Combine(Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().ManifestModule.FullyQualifiedName), "samples.pct"));
                ParseFile(sr);
                sr.Close();
            }
            catch
            {

            }
        }

        private string get_minimal(List<string> names)
        {
            string min = names[0];
            for (int i = 1; i < names.Count; i++)
                if (names[i].Length < min.Length)
                    min = names[i];
            return min;
        }

        public string GetSampleHeader(string name)
        {
            List<string> lst = new List<string>();
            foreach (string s in ht.Keys)
                if (string.Compare(name, s, true) == 0)
                    return s;
                else if (s.StartsWith(name, StringComparison.OrdinalIgnoreCase))
                    lst.Add(s);
            if (lst.Count == 1)
                return lst[0];
            else
                if (lst.Count > 1)
                    return get_minimal(lst);
                else return null;
        }

        public string GetSample(string name)
        {
            return ht[name] as string;
        }

        public string[] GetSamples(string name)
        {
            return (ht[name] as string).Split('\n');
        }

        private void ParseFile(StreamReader sr)
        {
            StringBuilder sb = new StringBuilder();
            string last_sample = null;
            string tmp = null;
            last_sample = sr.ReadLine().Trim('[', ']', ' ', '\t');
            while (!sr.EndOfStream)
            {
                tmp = sr.ReadLine();
                if (tmp.StartsWith("["))
                {
                    ht[last_sample] = sb.ToString().TrimEnd('\r', '\n');
                    last_sample = tmp.Trim('[', ']', ' ', '\t');
                    sb.Remove(0, sb.Length);
                }
                else
                    sb.AppendLine(tmp);
            }
            ht[last_sample] = sb.ToString().TrimEnd('\r', '\n');
        }
    }
}