using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
#if WIN32 
using MSHTML;
#else
using mshtml;
#endif
using sharpknife.Utils;
using System.Globalization;
using sharpknife.Controls;
using System.Drawing;
using System.IO;
using sharpknife.Data;
using sharpknife.Commands;
using sharpknife.Engines;

namespace sharpknife.Strategies
{
    class GetPaidMailStrategy : Strategy
    {
        public override bool CheckLogin(WebBrowserControl browser, PTCSource source)
        {
            //CashCrusader Version: 3.0.0
            //Last MySQL backup from admin: 2,507.32 days

            //Commissions settings:
            //Point ads: 10,5,3,2,1 %
            //Cash ads: 10,5,3,2,1 %
            //Must login every 30 days and
            //be at least 10% as active as your downline to get commission from downline clicks

            //Sales Commission: 10,5,3,2,1 %

            //Only support registered sites. Click here to verify registration

            return
                StringUtils.Contains(browser.Html, "CashCrusader Version:") ||
                StringUtils.Contains(browser.Html, "Log In");
        }

        public override void Login(WebBrowserControl browser, PTCSource source)
        {
            //<input type="text" name="username">
            //<input type="password" name="password">
            //<input type="submit" value="Login" name="submit">

            IHTMLInputElement username = HtmlUtils.GetInputByName(browser.Document, "username");
            IHTMLInputElement password = HtmlUtils.GetInputByName(browser.Document, "password");

            username.value = source.Username;
            password.value = source.Password;
            password.form.submit();
        }

        public override decimal GetBalance(WebBrowserControl browser, PTCSource source)
        {
            //<td align=right><font size="2"><b><font color="ffffff">Your account balance after all transactions:</font></b> </font>
            IHTMLElementCollection elements = HtmlUtils.GetElementCollection(browser.Document, "td");

            int count = elements.length;

            foreach (IHTMLElement element in elements)
            {
                if (!string.IsNullOrEmpty(element.innerText) &&
                    element.innerText.IndexOf("Your account balance after all transactions", StringComparison.InvariantCultureIgnoreCase) >= 0)
                {
                    IHTMLElementCollection innerTables = ((IHTMLElementCollection)element.all).tags("table");

                    if (innerTables.length == 0)
                    {
                        IHTMLTable table = (IHTMLTable)element.parentElement.parentElement.parentElement;

                        int rowIndex = 2;
                        int columnIndex = 1;

                        if (((IHTMLElement)table).innerHTML.IndexOf("Current Earnings", StringComparison.InvariantCultureIgnoreCase) >= 0)
                        {
                            rowIndex++;
                        }

                        IHTMLTableRow row = (IHTMLTableRow)browser.GetElementAt(table.rows, rowIndex);
                        IHTMLTableCell cell = (IHTMLTableCell)browser.GetElementAt(row.cells, columnIndex);

                        string value = ((IHTMLElement)cell).innerText.Substring(2).Trim();

                        return decimal.Parse(value, CultureInfo.InvariantCulture.NumberFormat);
                    }
                }
            }

            throw new Exception();
        }

        public override bool SolveCaptcha(WebBrowserControl browser, PTCSource source)
        {
            throw new NotImplementedException();
        }

        public override Ad ParseMail(Mail mail)
        {
            if (StringUtils.Contains(mail.Body, "<br />"))
            {
                mail.Body = mail.Body.Replace("<br />", "<br>");
            }

            string paidAd = StringUtils.GetTokens(mail.Body,
                "{}PAID AD<br>\r\n--------------------------------------------------<br>{}")[1];

            paidAd = paidAd.Replace("=\r\n", string.Empty);
            paidAd = paidAd.Replace("3D\"", "\"");
            paidAd = paidAd.Replace("=3D", "=");

            string[] links = StringUtils.GetTokens(paidAd, "<br>{}<br><a href=\"{}\"{}>{}</a><br><br><br>");

            if (links[1] == links[3])
            {
                Ad ad = new Ad()
                {
                    Link = links[1]
                };
                return ad;
            }

            return null;
        }

        public override bool ParseAds(WebBrowserControl browser, PTCSource source)
        {
            IHTMLElementCollection tables = HtmlUtils.GetElementCollection(browser.Document, "table");

            List<AdCommand> commands = new List<AdCommand>();
            int paidAds = 0;
            int ads = 0;

            string html = browser.Html;

            foreach (IHTMLElement element in tables)
            {
                string table = element.innerHTML;

                IHTMLElementCollection innerTables = ((IHTMLElementCollection)element.all).tags("table");

                if (innerTables.length == 0)
                {
                    int start = html.IndexOf(table);
                    int end = html.IndexOf("<br>", start, StringComparison.InvariantCultureIgnoreCase);

                    if (end >= 0 && html.Substring(start, end - start).IndexOf("The ad above is worth", StringComparison.InvariantCultureIgnoreCase) >= 0)
                    {
                        string ad = html.Substring(start, end - start);

                        // Cheat bot checks
                        //http://www.no-minimum.com/scripts/runner.php?REDIRECT=http%3A%2F%2Fwww.no-minimum.com%2Fimages%2Fohoh.gif&amp;hash=7ae463cd6a3a40d64a083502d71c9bb4
                        if (ad.IndexOf("ohoh.gif", StringComparison.InvariantCultureIgnoreCase) >= 0)
                        {
                            throw new Exception("Not expected");
                            continue;
                        }

                        try
                        {
                            AdLogItem item = new AdLogItem(DateTime.Now, ad);

                            if (item.Value > 0)
                            {
                                AdCommand command = new AdCommand(
                                    item.Link,
                                    item.Timer + 5, item.Type == AdLogItem.ValueType.Cents ? AdCommand.BonusValue.Cents : AdCommand.BonusValue.Points,
                                    item.Value,
                                    source.Name);

                                commands.Add(command);
                                ads++;

                                if (command.Bonus == AdCommand.BonusValue.Cents)
                                    paidAds++;
                            }
                        }
                        catch (Exception ex)
                        {
                            LogItem item = new LogItem(ex.Message);
                            item.Save();
                        }
                    }
                }
            }

            ParseAdsCommand parseAdsCommand = new ParseAdsCommand(source.Name);

            //if (paidAds > 0)
            {
                foreach (AdCommand command in commands)
                {
                    CommandEngine.GetEngine().Commands.Add(command);
                }
            }
            
            if (ads == 0)
            {
                parseAdsCommand.NextExecution = DateTime.Now.AddHours(2);
            }

            CommandEngine.GetEngine().Commands.Add(parseAdsCommand);

            return true;
        }

        public override decimal GetReferrals(WebBrowserControl browser, PTCSource source)
        {
            //<tr><td><font size="2"><b><font color="000000">Total:</font></b></font></td><td align="center" width="68%"><font size="2"><b><font color="000000"> 1</font></b></font></td></tr>
            string[] tokens = StringUtils.GetTokens(StringUtils.RemoveQuotes(browser.Html), "{}Total:{}<FONT color=#000000>{}</font>{}");
            string referrals = tokens[2];

            return decimal.Parse(referrals, CultureInfo.InvariantCulture.NumberFormat);
        }
    }
}