using System;
using System.Text.RegularExpressions;
using WikiSharpAPI;

namespace AAB
{
    public class RegularAfdVoteRetriever : AfdVoteRetriever
    {
        public override string RetrieveAfdVotes(string discussionPage)
        {
            if (string.IsNullOrEmpty(discussionPage))
                return null;

            DataPage wikiPage = new DataPage(Data, discussionPage);

            if (!wikiPage.Read(ReadPart.NonTalkPage))
                return null;

            wikiPage.Content = Regex.Replace(wikiPage.Content, @"<s>[^<]+</s>", @"");

            int deleteMatches = Regex.Matches(wikiPage.Content, @"^[:*]{0,15}?(?:.(?<!''')){0,30}?(?<!<s>)'''?(?<!<s>)[^']{0,15}?(?<!<s>)(soft[\s\-]*)?(delete|deletion|speedied)", RegexOptions.IgnoreCase | RegexOptions.Multiline).Count;
            int keepMatches = Regex.Matches(wikiPage.Content, @"^[:*]{0,15}?(?:.(?<!''')){0,30}?(?<!<s>)'''?(?<!<s>)[^']{0,15}?(?<!<s>)(do not delete|don't delete|keep|save)", RegexOptions.IgnoreCase | RegexOptions.Multiline).Count;
            int mergeMatches = Regex.Matches(wikiPage.Content, @"^[:*]{0,15}?(?:.(?<!''')){0,30}?(?<!<s>)'''?(?<!<s>)[^']{0,15}?(?<!<s>)merge", RegexOptions.IgnoreCase | RegexOptions.Multiline).Count;
            int redirectMatches = Regex.Matches(wikiPage.Content, @"^[:*]{0,15}?(?:.(?<!''')){0,30}?(?<!<s>)'''?(?<!<s>)[^']{0,15}?(?<!<s>)redirect", RegexOptions.IgnoreCase | RegexOptions.Multiline).Count;
            int userfyMatches = Regex.Matches(wikiPage.Content, @"^[:*]{0,15}?(?:.(?<!''')){0,30}?(?<!<s>)'''?(?<!<s>)[^']{0,15}?(?<!<s>)userfy", RegexOptions.IgnoreCase | RegexOptions.Multiline).Count;
            int moveMatches = Regex.Matches(wikiPage.Content, @"^[:*]{0,15}?(?:.(?<!''')){0,30}?(?<!<s>)'''?(?<!<s>)[^']{0,15}?(?<!<s>)(?:rename|move)", RegexOptions.IgnoreCase | RegexOptions.Multiline).Count;

            MatchCollection mc = Regex.Matches(wikiPage.Content, @"\|Relisted\]\] to generate");
            Match sort = Regex.Match(wikiPage.Content, @"^.{0,20}<small>\s*(''')?Note(''')?\s*:\s*This debate", RegexOptions.Multiline | RegexOptions.IgnoreCase);

            PageRevisionList pageRevisionList = new PageRevisionList();
            if (!pageRevisionList.AddRevisionsFromPage(discussionPage, ListOrder.NewerToOlder))
                return null;

            int pc =
                Math.Max(0,
                    pageRevisionList.UniqueUsersExcludingSuffix("bot", true).Count - 1 - (mc.Count > 0 ? 1 : 0) - (sort.Success ? 1 : 0) // excl. nominator and excl. relist and excl. delsort
                );

            string info = "{{tooltip|";

            info += "'''" + pc + "''' participant" + (pc > 1 || pc == 0 ? "s" : "");

            info += "|del: " + deleteMatches + ", keep: " + keepMatches;
            if (moveMatches > 0) info += ", move: " + moveMatches;
            if (mergeMatches > 0) info += ", merge: " + mergeMatches;
            if (redirectMatches > 0) info += ", redir: " + redirectMatches;
            if (userfyMatches > 0) info += ", userfy: " + userfyMatches;

            info += "}}";

            if (mc.Count > 0)
                info += "; '''{{color|#FF4F00|relisted}}'''";

            return info;
        }
    }
}