#nullable disable
using Microsoft.EntityFrameworkCore;
using LinqToDB;
using NadekoBot.Services.Database;
using NadekoBot.Services.Database.Models;

namespace NadekoBot.Db;

public static class UserXpExtensions
{
    public static UserXpStats GetOrCreateUserXpStats(this NadekoContext ctx, ulong guildId, ulong userId)
    {
        var usr = ctx.UserXpStats.FirstOrDefault(x => x.UserId == userId && x.GuildId == guildId);

        if (usr is null)
        {
            ctx.Add(usr = new()
                {
                    Xp = 0, UserId = userId, NotifyOnLevelUp = XpNotificationLocation.None, GuildId = guildId,
                }
            );
        }

        return usr;
    }

    public static List<UserXpStats> GetUsersFor(this DbSet<UserXpStats> xps, ulong guildId, int page)
        => xps.AsQueryable()
            .AsNoTracking()
            .Where(x => x.GuildId == guildId)
            .OrderByDescending(x => x.Xp + x.AwardedXp)
            .Skip(page * 9)
            .Take(9)
            .ToList();

    public static List<UserXpStats> GetTopUserXps(this DbSet<UserXpStats> xps, ulong guildId, int count)
        => xps.AsQueryable()
            .AsNoTracking()
            .Where(x => x.GuildId == guildId)
            .OrderByDescending(x => x.Xp + x.AwardedXp)
            .Take(count)
            .ToList();

    public static int GetUserGuildRanking(this DbSet<UserXpStats> xps, ulong userId, ulong guildId)
        //            @"SELECT COUNT(*) + 1
        //FROM UserXpStats
        //WHERE GuildId = @p1 AND ((Xp + AwardedXp) > (SELECT Xp + AwardedXp
        //	FROM UserXpStats
        //	WHERE UserId = @p2 AND GuildId = @p1
        //	LIMIT 1));";
        => xps.AsQueryable()
               .AsNoTracking()
               .Where(x => x.GuildId == guildId &&
                           x.Xp + x.AwardedXp >
                           xps.AsQueryable()
                               .Where(y => y.UserId == userId && y.GuildId == guildId)
                               .Select(y => y.Xp + y.AwardedXp)
                               .FirstOrDefault()
               )
               .Count() +
           1;

    public static void ResetGuildUserXp(this DbSet<UserXpStats> xps, ulong userId, ulong guildId)
        => xps.Delete(x => x.UserId == userId && x.GuildId == guildId);

    public static void ResetGuildXp(this DbSet<UserXpStats> xps, ulong guildId)
        => xps.Delete(x => x.GuildId == guildId);
}