using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Entity;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Internal;
using Shared;

namespace Contextlib
{
    public class DbQuoteManager : IQuoteService<Quote>
    {
        private WTFContext _context;
        private GenericRepository<Quote> _repo;

        public DbQuoteManager(WTFContext context)
        {
            _context = context ?? throw new ArgumentNullException(nameof(context), "Database context cannot be null.");
            _repo = new GenericRepository<Quote>(_context);
        }


        public async Task AddQuote(Quote quote)
        {
            if (quote == null)
            {
                throw new ArgumentNullException(nameof(quote), "quote cannot be null.");
            }
            _repo.Insert(quote);
            await _context.SaveChangesAsync();
        }

        public async Task<PaginationResult<Quote>> GetAllQuote()
        {
            List<Quote> quotes = _context.quotes.Where(item => item.IsValid)
                                .Include(q => q.Source).Include(q => q.Character).ThenInclude(c => c.Images)
                                .ToList();
            return new PaginationResult<Quote>(quotes.Count, 0, quotes.Count, quotes);
        }

        public async Task<PaginationResult<Quote>> GetAllQuoteLang(int index, int pageSize, int lang)
        {
            List<Quote> quotes = _context.quotes.Where(item => item.IsValid && item.Langage == (LangEnum)lang)
                                .Include(q => q.Source).Include(q => q.Character).ThenInclude(c => c.Images)
                                .Skip(index * pageSize).Take(pageSize).ToList();
            return new PaginationResult<Quote>(quotes.Count, index, pageSize, quotes);
        }

        public async Task<Quote> GetDailyQuote(DateOnly date, int lang)
        {
            List<Quote> quotes = _context.quotes.Where(item => item.IsValid && item.Langage == (LangEnum)lang)
                                .Include(q => q.Source).Include(q => q.Character).ThenInclude(c => c.Images).Include(q => q.Favorite)
                                .ToList();
            Quote quote = _repo.GetById(date.DayNumber % quotes.Count()) ?? quotes.First();

            return  quote;
        }

        public async Task<PaginationResult<Quote>> GetFavorites(int index, int pageSize, int UserId)
        {
            List<Quote> quotes = _context.quotes.Where(item => item.IsValid && item.Favorite.Where(p => p.Id == UserId) != null)
                                .Include(q => q.Source).Include(q => q.Character).ThenInclude(c => c.Images).Include(q => q.Favorite)
                                .Skip(index * pageSize).Take(pageSize).ToList();

            return new PaginationResult<Quote>(quotes.Count, index, pageSize, quotes);
        }

        public async Task<PaginationResult<Quote>> GetInvalidQuote(int index, int pageSize, int lang)
        {
            List<Quote> quotes = _context.quotes.Where(item => !item.IsValid && item.Langage == (LangEnum)lang)
                                .Include(q => q.Source).Include(q => q.Character).ThenInclude(c => c.Images)
                                .Skip(index * pageSize).Take(pageSize).ToList();

            return new PaginationResult<Quote>(quotes.Count, index, pageSize, quotes);
        }

        public async Task<PaginationResult<Quote>> GetInvalidQuote(int index, int pageSize)
        {
            List<Quote> quotes = _context.quotes.Where(item => !item.IsValid)
                                .Include(q => q.Source).Include(q => q.Character).ThenInclude(c => c.Images)
                                .Skip(index * pageSize).Take(pageSize).ToList();

            return new PaginationResult<Quote>(quotes.Count, index, pageSize, quotes);
        }

        public async Task<int> GetLastQuoteId()
        {
            PaginationResult<Quote> quotes = await GetAllQuote();
            int lastQuoteId = 0;
            foreach (Quote quote in quotes.items)
            {
                if (quote.Id >= lastQuoteId)
                {
                    lastQuoteId = quote.Id + 1;
                }
            }
            return lastQuoteId;
        }

        public async Task<Quote> GetQuoteById(int id)
        {
            Quote? quote = _context.quotes.Where(item => item.Id == id)
                                .Include(q => q.Source).Include(q => q.Character).ThenInclude(c => c.Images)
                                .First();
            if (quote == null)
            {
                throw new KeyNotFoundException($"Error : No quotes found with the ID: {id}.");
            }
            return quote;
        }

        public async Task<PaginationResult<Quote>> GetSomeQuote(int index, int pageSize)
        {
            throw new NotImplementedException();
        }

        public async Task<PaginationResult<Quote>> GetSuggestions(int index, int pageSize, int lang)
        {
            throw new NotImplementedException();
        }

        public async Task<PaginationResult<Quote>> GetValidQuote(int index, int pageSize)
        {
            throw new NotImplementedException();
        }





        public async Task RemoveQuote(int quoteId)
        {
            throw new NotImplementedException();
        }

        public async Task<PaginationResult<Quote>> SearchByCharacter(string character, int index, int pageSize, int lang)
        {
            throw new NotImplementedException();
        }

        public async Task<PaginationResult<Quote>> SearchByContent(string content, int index, int pageSize, int lang)
        {
            throw new NotImplementedException();
        }

        public async Task<PaginationResult<Quote>> SearchBySource(string source, int index, int pageSize, int lang)
        {
            throw new NotImplementedException();
        }

        public async Task UpdateQuote(int quoteId, Quote quote)
        {
            throw new NotImplementedException();
        }

        public async Task ValidateQuote(int quoteId, bool isValidate)
        {
            throw new NotImplementedException();
        }
    }
}