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

namespace sharpknife
{
    class AdLogItem
    {
        static string LINK_START = "href=\"";
        static string LINK_END = "\"";
        static string TIMER_START = "onclick=javascript:reloadpage(";
        static string TIMER_END = ")";
        static string VALUE_START = "The ad above is worth <B>";
        static string VALUE_END = "</B>";

        public enum ValueType
        {
            Cents,
            Points
        }

        public ValueType Type { get; set; }

        public decimal Value { get; set; }

        public int Timer { get; set; }

        public string Link { get; set; }

        public string Body { get; set; }

        public AdLogItem(DateTime timestamp, ValueType type, decimal value, int timer, string link, string body)
        {
            Type = type;
            Value = value;
            Timer = timer;
            Link = link;
            Body = body;
        }

        public AdLogItem(DateTime timestamp, string html)
        {
            Type = html.IndexOf("point(s)", StringComparison.InvariantCultureIgnoreCase) >= 0 ? ValueType.Points : ValueType.Cents;

            int valueStart = html.IndexOf(VALUE_START, StringComparison.InvariantCultureIgnoreCase) + VALUE_START.Length;
            int valueEnd = html.IndexOf(VALUE_END, valueStart, StringComparison.InvariantCultureIgnoreCase);

            Value = decimal.Parse(html.Substring(valueStart, valueEnd - valueStart), CultureInfo.InvariantCulture.NumberFormat); // .Replace(".", ","));

            int timerStart = html.IndexOf(TIMER_START, StringComparison.InvariantCultureIgnoreCase) + TIMER_START.Length;
            int timerEnd = html.IndexOf(TIMER_END, timerStart, StringComparison.InvariantCultureIgnoreCase);

            int timer = 0;

            int.TryParse(html.Substring(timerStart, timerEnd - timerStart), out timer);

            Timer = timer;

            if (html.IndexOf(LINK_START, StringComparison.InvariantCultureIgnoreCase) >= 0)
            {
                int linkStart = html.IndexOf(LINK_START, StringComparison.InvariantCultureIgnoreCase) + LINK_START.Length;
                int linkEnd = html.IndexOf(LINK_END, linkStart, StringComparison.InvariantCultureIgnoreCase);

                Link = html.Substring(linkStart, linkEnd - linkStart);
                if (Link.Contains('&'))
                {
                    Link = Link.Substring(0, Link.IndexOf('&'));
                }
            }
            else
            {
                // TODO: throw malformedadexception
                throw new Exception("Malformed ad");
            }

            Body = html;
        }

        public override string ToString()
        {
            return string.Format("Value: {0} {1}\nTimer: {2} seconds\nLink: {3}\nBody: {4}",
                Value, Type, Timer, Link, Body);
        }
    }
}