using EFlib;
using Microsoft.EntityFrameworkCore;
using Microsoft.IdentityModel.Tokens;
using Model;

namespace EFManager
{
    public class ManagerChampion : IChampionsManager
    {
        public SQLiteContext context = new SQLiteContext();

        public async Task<Champion?> AddItem(Champion? item)
        {
            if (item == null)
                return null;

            await context.AddAsync(item.toEF());
            await context.SaveChangesAsync();
            return item;
        }

        public Task<bool> DeleteItem(Champion? item)
        {
            if (item == null)
                return false;

            context.Remove(item.toEF());
            await context.SaveChangesAsync();
            return true;
        }

        public Task<IEnumerable<Champion?>> GetItems(int index, int count, string? orderingPropertyName = null, bool descending = false)
        {
            IQueryable<Champion> query = Champions.Skip(index).Take(count);

            if (!string.IsNullOrEmpty(orderingPropertyName))
            {
                query = descending ?
                    query.OrderByDescending(c => EF.Property<object>(c, orderingPropertyName)) :
                    query.OrderBy(c => EF.Property<object>(c, orderingPropertyName));
            }

            return await query.ToListAsync();
        }

        public Task<IEnumerable<Champion?>> GetItemsByCharacteristic(string charName, int index, int count, string? orderingPropertyName = null, bool descending = false)
        {
            IQueryable<Champion> query = Champions
                        .Where(c => c.Characteristics.ContainsKey(charName))
                        .Skip(index)
                        .Take(count);

            if (!string.IsNullOrEmpty(orderingPropertyName))
            {
                query = descending ?
                    query.OrderByDescending(c => EF.Property<object>(c, orderingPropertyName)) :
                    query.OrderBy(c => EF.Property<object>(c, orderingPropertyName));
            }

            return await query.ToListAsync();

        }

        public Task<IEnumerable<Champion?>> GetItemsByClass(ChampionClass championClass, int index, int count, string? orderingPropertyName = null, bool descending = false)
        {
            IQueryable<Champion> query = Champions
                       .Where(c => c.Class == championClass)
                       .Skip(index)
                       .Take(count);

            if (!string.IsNullOrEmpty(orderingPropertyName))
            {
                query = descending ?
                    query.OrderByDescending(c => EF.Property<object>(c, orderingPropertyName)) :
                    query.OrderBy(c => EF.Property<object>(c, orderingPropertyName));
            }

            return await query.ToListAsync();
        }

        public Task<IEnumerable<Champion?>> GetItemsByName(string substring, int index, int count, string? orderingPropertyName = null, bool descending = false)
        {
            IQueryable<Champion> query = Champions
                   .Where(c => c.Name.Contains(substring))
                   .Skip(index)
                   .Take(count);

            if (!string.IsNullOrEmpty(orderingPropertyName))
            {
                query = descending ?
                    query.OrderByDescending(c => EF.Property<object>(c, orderingPropertyName)) :
                    query.OrderBy(c => EF.Property<object>(c, orderingPropertyName));
            }

            return await query.ToListAsync();
        }

        public Task<IEnumerable<Champion?>> GetItemsByRunePage(RunePage? runePage, int index, int count, string? orderingPropertyName = null, bool descending = false)
        {
            IQueryable<Champion> query = Champions;

            if (runePage != null)
            {
                query = query.Where(c => c.RunePageId == runePage.Id);
            }

            query = query.Skip(index).Take(count);

            if (!string.IsNullOrEmpty(orderingPropertyName))
            {
                query = descending ?
                    query.OrderByDescending(c => EF.Property<object>(c, orderingPropertyName)) :
                    query.OrderBy(c => EF.Property<object>(c, orderingPropertyName));
            }

            return await query.ToListAsync();
        }

        public Task<IEnumerable<Champion?>> GetItemsBySkill(Skill? skill, int index, int count, string? orderingPropertyName = null, bool descending = false)
        {
            throw new NotImplementedException();
        }

        public Task<IEnumerable<Champion?>> GetItemsBySkill(string skill, int index, int count, string? orderingPropertyName = null, bool descending = false)
        {
            throw new NotImplementedException();
        }

        public Task<int> GetNbItems()
        {
            throw new NotImplementedException();
        }

        public Task<int> GetNbItemsByCharacteristic(string charName)
        {
            return await context.Where(c => c.Characteristics.Any(ch => ch.Name == charName)).CountAsync();
        }

        public Task<int> GetNbItemsByClass(ChampionClass championClass)
        {
            throw new NotImplementedException();
        }

        public Task<int> GetNbItemsByName(string substring)
        {
            throw new NotImplementedException();
        }

        public Task<int> GetNbItemsByRunePage(RunePage? runePage)
        {
            throw new NotImplementedException();
        }

        public Task<int> GetNbItemsBySkill(Skill? skill)
        {
            throw new NotImplementedException();
        }

        public Task<int> GetNbItemsBySkill(string skill)
        {
            throw new NotImplementedException();
        }

        public Task<Champion?> UpdateItem(Champion? oldItem, Champion? newItem)
        {
            throw new NotImplementedException();
        }
    }
}