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


namespace SoyText
{
    public class ParsedDocument
    {
        Document src;
        public Dictionary<String, String> values;
        public String cdr;
        public bool keyExists(String key)
        {
            return values.Keys.Contains(key);
        }
        public String getValue(String key)
        {
            return keyExists(key) ? values[key] : null;
        }
        public ParsedDocument(Document src)
        {
            this.src = src;
            values = new Dictionary<string, string>();
            init();
        }
        public void setValue(String key, String value)
        {
            var resting = false;
            cdr = "";
            var newLines = "";
            foreach (var line in Regex.Split(src.content, "\r*\n"))
            {
                if (resting) { newLines += line + "\n"; continue; }
                var m = Regex.Match(line, "^[ \t]*$");
                var valueSetted = false;
                if (m.Success)
                {
                    if (!valueSetted)
                    {
                        newLines += key + ": " + value + "\n";
                    }
                    resting = true;
                }
                var m2 = Regex.Match(line, "([^:]+): *(.*)");
                if (m2.Success)
                {
                    var k = m2.Groups[1].Value;
                    var v = m2.Groups[2].Value;
                    if (k.Equals(key))
                    {
                        newLines += key + ": " + value + "\n";
                        valueSetted = true;
                    }
                    else
                    {
                        newLines += line + "\n";
                    }
                }
                else
                {
                    newLines += line + "\n";
                }
            }
            src.content = newLines;
            init();
        }

        void init() {
            var resting = false;
            cdr = "";
            foreach (var line in Regex.Split(src.content,"\r*\n"))
            {
                if (resting) { cdr += line + "\n"; continue; }
                var m=Regex.Match(line, "^[ \t]*$");
                if (m.Success)
                {
                    resting = true;
                }
                var m2 = Regex.Match(line, "([^:]+): *(.*)");
                if (m2.Success)
                {
                    values[m2.Groups[1].Value] = m2.Groups[2].Value;
                }
            }

        }
    }
}