using Lieb.Models.GuildWars2;
using Lieb.Models.GuildWars2.Raid;
using Microsoft.EntityFrameworkCore;

namespace Lieb.Data
{
    public class RaidRandomizerService
    {
        private readonly IDbContextFactory<LiebContext> _contextFactory;
        private static Random _random = new Random();

        public RaidRandomizerService(IDbContextFactory<LiebContext> contextFactory)
        {
            _contextFactory = contextFactory;
        }

        public async Task RandomizeRaid(int raidId)
        {
            using var context = _contextFactory.CreateDbContext();
            Raid? raid = context.Raids
                .Include(r => r.Roles)
                .Include(r => r.SignUpHistory)
                .Include(r => r.Reminders)
                .Include(r => r.SignUps)
                .ThenInclude(s => s.LiebUser)
                .Include(r => r.SignUps)
                .ThenInclude(s => s.GuildWars2Account)
                .ThenInclude(a => a.EquippedBuilds)
                .ThenInclude(e => e.GuildWars2Build)
                .Include(r => r.SignUps)
                .ThenInclude(s => s.RaidRole)
                .FirstOrDefault(r => r.RaidId == raidId);

            if (raid == null || raid.RaidType == RaidType.Planned)
                return;

            switch (raid.RaidType)
            {
                case RaidType.RandomClasses:
                    RandomizeClasses(raid);
                    break;
                case RaidType.RandomEliteSpecialization:
                    RandomizeEliteSpecs(raid);
                    break;
                case RaidType.RandomWithBoons:
                    RandomizeWithBoons(raid);
                    break;
            }
            await context.SaveChangesAsync();
            CleanUpRoles(raid, context);
            await context.SaveChangesAsync();
        }

        private void RandomizeClasses(Raid raid)
        {
            foreach (RaidSignUp signUp in raid.SignUps)
            {
                HashSet<GuildWars2Class> possibleClasses = new HashSet<GuildWars2Class>();
                foreach (Equipped build in signUp.GuildWars2Account.EquippedBuilds)
                {
                    possibleClasses.Add(build.GuildWars2Build.Class);
                }
                RaidRole role = new RaidRole();
                role.Spots = 0;
                if (possibleClasses.Count > 0)
                {
                    role.Name = possibleClasses.ToList()[_random.Next(possibleClasses.Count - 1)].ToString();
                }
                else
                {
                    role.Name = "No class found.";
                }
                raid.Roles.Add(role);
                signUp.RaidRole = role;
            }
        }

        private void RandomizeEliteSpecs(Raid raid)
        {
            foreach (RaidSignUp signUp in raid.SignUps)
            {
                HashSet<EliteSpecialization> possibleEliteSpecs = new HashSet<EliteSpecialization>();
                foreach (Equipped build in signUp.GuildWars2Account.EquippedBuilds)
                {
                    possibleEliteSpecs.Add(build.GuildWars2Build.EliteSpecialization);
                }
                RaidRole role = new RaidRole();
                role.Spots = 0;
                if (possibleEliteSpecs.Count > 0)
                {
                    role.Name = possibleEliteSpecs.ToList()[_random.Next(possibleEliteSpecs.Count - 1)].ToString();
                }
                else
                {
                    role.Name = "No class found.";
                }
                raid.Roles.Add(role);
                signUp.RaidRole = role;
            }
        }

        private void RandomizeWithBoons(Raid raid)
        {
            Dictionary<ulong, GuildWars2Build> signedUpUsers= new Dictionary<ulong, GuildWars2Build>();
            foreach (RaidSignUp signUp in raid.SignUps)
            {
                if (signUp.GuildWars2Account.EquippedBuilds.Count > 0)
                {
                    signedUpUsers.Add(signUp.LiebUserId, signUp.GuildWars2Account.EquippedBuilds.ToList()[_random.Next(signUp.GuildWars2Account.EquippedBuilds.Count - 1)].GuildWars2Build);
                }
            }
            BalanceRoles(raid, signedUpUsers);
            foreach(var userBuild in signedUpUsers)
            {
                RaidRole role = new RaidRole();
                role.Spots = 0;
                role.Name = userBuild.Value.BuildName;
                raid.Roles.Add(role);
                RaidSignUp signUp = raid.SignUps.FirstOrDefault(s => s.LiebUserId == userBuild.Key);
                signUp.RaidRole = role;
            }
        }

        private void BalanceRoles(Raid raid, Dictionary<ulong, GuildWars2Build> signedUpUsers, int recusrionDepth = 0)
        {
            int Alac = 0;
            int Quick = 0;
            int Heal = 0;
            int Might = 0;

            signedUpUsers = signedUpUsers.OrderBy(u => _random.Next()).ToDictionary(u => u.Key, u => u.Value);

            foreach(GuildWars2Build build in signedUpUsers.Values)
            {
                Alac += build.Alacrity;
                Quick += build.Quickness;
                Heal += build.Heal;
                Might += build.Might;
            }
            if(Alac > 10)
            {
                ReduceAlac(raid, signedUpUsers, Alac);
            }
            if(Alac < 10)
            {
                IncreaseAlac(raid, signedUpUsers, Alac);
            }
            signedUpUsers = signedUpUsers.OrderBy(u => _random.Next()).ToDictionary(u => u.Key, u => u.Value);
            if (Quick > 10)
            {
                ReduceQuick(raid, signedUpUsers, Quick);
            }
            if (Quick < 10)
            {
                IncreaseQuick(raid, signedUpUsers, Quick);
            }
            signedUpUsers = signedUpUsers.OrderBy(u => _random.Next()).ToDictionary(u => u.Key, u => u.Value);
            if (Heal > 10)
            {
                ReduceHeal(raid, signedUpUsers, Heal);
            }
            if (Heal < 10)
            {
                IncreaseHeal(raid, signedUpUsers, Heal);
            }
            signedUpUsers = signedUpUsers.OrderBy(u => _random.Next()).ToDictionary(u => u.Key, u => u.Value);
            if (Might > 10)
            {
                ReduceMight(raid, signedUpUsers, Might);
            }
            if (Might < 10)
            {
                IncreaseMight(raid, signedUpUsers, Might);
            }

            if(recusrionDepth < 20)
            {
                recusrionDepth++;
                BalanceRoles(raid, signedUpUsers, recusrionDepth);
            }
        }

        private void ReduceAlac(Raid raid, Dictionary<ulong, GuildWars2Build> signedUpUsers, int currentAlac)
        {
            foreach (var userBuild in signedUpUsers)
            {
                if(userBuild.Value.Alacrity > 0 && currentAlac > 10)
                {
                    RaidSignUp signUp = raid.SignUps.FirstOrDefault(s => s.LiebUserId == userBuild.Key);
                    Equipped newBuild = signUp.GuildWars2Account.EquippedBuilds.Where(b => b.GuildWars2Build.Alacrity == 0).OrderBy(u => _random.Next()).FirstOrDefault();
                    if (newBuild != null)
                    {
                        currentAlac -= userBuild.Value.Alacrity;
                        signedUpUsers[userBuild.Key] = newBuild.GuildWars2Build;
                        currentAlac += signedUpUsers[userBuild.Key].Alacrity;
                    }
                }
            }
        }

        private void IncreaseAlac(Raid raid, Dictionary<ulong, GuildWars2Build> signedUpUsers, int currentAlac)
        {
            foreach (var userBuild in signedUpUsers)
            {
                if (userBuild.Value.Alacrity == 00 && currentAlac < 10)
                {
                    RaidSignUp signUp = raid.SignUps.FirstOrDefault(s => s.LiebUserId == userBuild.Key);
                    Equipped newBuild = signUp.GuildWars2Account.EquippedBuilds.Where(b => b.GuildWars2Build.Alacrity > 0).OrderBy(u => _random.Next()).FirstOrDefault();
                    if (newBuild != null)
                    {
                        currentAlac -= userBuild.Value.Alacrity;
                        signedUpUsers[userBuild.Key] = newBuild.GuildWars2Build;
                        currentAlac += signedUpUsers[userBuild.Key].Alacrity;
                    }
                }
            }
        }

        private void ReduceQuick(Raid raid, Dictionary<ulong, GuildWars2Build> signedUpUsers, int currentQuick)
        {
            foreach (var userBuild in signedUpUsers)
            {
                if (userBuild.Value.Quickness > 0 && currentQuick > 10)
                {
                    RaidSignUp signUp = raid.SignUps.FirstOrDefault(s => s.LiebUserId == userBuild.Key);
                    Equipped newBuild = signUp.GuildWars2Account.EquippedBuilds.Where(b => b.GuildWars2Build.Quickness == 0).OrderBy(u => _random.Next()).FirstOrDefault();
                    if (newBuild != null)
                    {
                        currentQuick -= userBuild.Value.Quickness;
                        signedUpUsers[userBuild.Key] = newBuild.GuildWars2Build;
                        currentQuick += signedUpUsers[userBuild.Key].Quickness;
                    }
                }
            }
        }

        private void IncreaseQuick(Raid raid, Dictionary<ulong, GuildWars2Build> signedUpUsers, int currentQuick)
        {
            foreach (var userBuild in signedUpUsers)
            {
                if (userBuild.Value.Quickness == 00 && currentQuick < 10)
                {
                    RaidSignUp signUp = raid.SignUps.FirstOrDefault(s => s.LiebUserId == userBuild.Key);
                    Equipped newBuild = signUp.GuildWars2Account.EquippedBuilds.Where(b => b.GuildWars2Build.Quickness > 0).OrderBy(u => _random.Next()).FirstOrDefault();
                    if (newBuild != null)
                    {
                        currentQuick -= userBuild.Value.Quickness;
                        signedUpUsers[userBuild.Key] = newBuild.GuildWars2Build;
                        currentQuick += signedUpUsers[userBuild.Key].Quickness;
                    }
                }
            }
        }

        private void ReduceMight(Raid raid, Dictionary<ulong, GuildWars2Build> signedUpUsers, int currentMight)
        {
            foreach (var userBuild in signedUpUsers)
            {
                if (userBuild.Value.Might > 0 && currentMight > 10)
                {
                    RaidSignUp signUp = raid.SignUps.FirstOrDefault(s => s.LiebUserId == userBuild.Key);
                    Equipped newBuild = signUp.GuildWars2Account.EquippedBuilds.Where(b => b.GuildWars2Build.Might == 0).OrderBy(u => _random.Next()).FirstOrDefault();
                    if (newBuild != null)
                    {
                        currentMight -= userBuild.Value.Might;
                        signedUpUsers[userBuild.Key] = newBuild.GuildWars2Build;
                        currentMight += signedUpUsers[userBuild.Key].Might;
                    }
                }
            }
        }

        private void IncreaseMight(Raid raid, Dictionary<ulong, GuildWars2Build> signedUpUsers, int currentMight)
        {
            foreach (var userBuild in signedUpUsers)
            {
                if (userBuild.Value.Might == 00 && currentMight < 10)
                {
                    RaidSignUp signUp = raid.SignUps.FirstOrDefault(s => s.LiebUserId == userBuild.Key);
                    Equipped newBuild = signUp.GuildWars2Account.EquippedBuilds.Where(b => b.GuildWars2Build.Might > 0).OrderBy(u => _random.Next()).FirstOrDefault();
                    if (newBuild != null)
                    {
                        currentMight -= userBuild.Value.Might;
                        signedUpUsers[userBuild.Key] = newBuild.GuildWars2Build;
                        currentMight += signedUpUsers[userBuild.Key].Might;
                    }
                }
            }
        }

        private void ReduceHeal(Raid raid, Dictionary<ulong, GuildWars2Build> signedUpUsers, int currentHeal)
        {
            foreach (var userBuild in signedUpUsers)
            {
                if (userBuild.Value.Heal > 0 && currentHeal > 10)
                {
                    RaidSignUp signUp = raid.SignUps.FirstOrDefault(s => s.LiebUserId == userBuild.Key);
                    Equipped newBuild = signUp.GuildWars2Account.EquippedBuilds.Where(b => b.GuildWars2Build.Heal == 0).OrderBy(u => _random.Next()).FirstOrDefault();
                    if (newBuild != null)
                    {
                        currentHeal -= userBuild.Value.Heal;
                        signedUpUsers[userBuild.Key] = newBuild.GuildWars2Build;
                        currentHeal += signedUpUsers[userBuild.Key].Heal;
                    }
                }
            }
        }

        private void IncreaseHeal(Raid raid, Dictionary<ulong, GuildWars2Build> signedUpUsers, int currentHeal)
        {
            foreach (var userBuild in signedUpUsers)
            {
                if (userBuild.Value.Heal == 00 && currentHeal < 10)
                {
                    RaidSignUp signUp = raid.SignUps.FirstOrDefault(s => s.LiebUserId == userBuild.Key);
                    Equipped newBuild = signUp.GuildWars2Account.EquippedBuilds.Where(b => b.GuildWars2Build.Heal > 0).OrderBy(u => _random.Next()).FirstOrDefault();
                    if (newBuild != null)
                    {
                        currentHeal -= userBuild.Value.Heal;
                        signedUpUsers[userBuild.Key] = newBuild.GuildWars2Build;
                        currentHeal += signedUpUsers[userBuild.Key].Heal;
                    }
                }
            }
        }

        private void CleanUpRoles(Raid raid, LiebContext context)
        {
            List<RaidRole> rolesToDelete = new List<RaidRole>();
            foreach (RaidRole role in raid.Roles)
            {
                if (!role.IsRandomSignUpRole && raid.SignUps.FirstOrDefault(s => s.RaidRoleId == role.RaidRoleId) == null)
                {
                    rolesToDelete.Add(role);
                }
            }
            foreach (RaidRole role in rolesToDelete)
            {
                raid.Roles.Remove(role);
            }
            context.RaidRoles.RemoveRange(rolesToDelete);
        }

    }
}