using Microsoft.EntityFrameworkCore;
using System.Linq;
using System.Collections.Generic;
using Oqtane.Modules;

namespace SZUAbsolventenverein.Module.BlackBoard.Repository
{
    public interface IBlackBoardRepository
    {
        IEnumerable<Models.BlackBoard> GetBlackBoards(int ModuleId);
        Models.BlackBoard GetBlackBoard(int BlackBoardId);
        Models.BlackBoard GetBlackBoard(int BlackBoardId, bool tracking);
        Models.BlackBoard AddBlackBoard(Models.BlackBoard BlackBoard);
        Models.BlackBoard UpdateBlackBoard(Models.BlackBoard BlackBoard);
        void DeleteBlackBoard(int BlackBoardId);
    }

    public class BlackBoardRepository : IBlackBoardRepository, ITransientService
    {
        private readonly IDbContextFactory<BlackBoardContext> _factory;

        public BlackBoardRepository(IDbContextFactory<BlackBoardContext> factory)
        {
            _factory = factory;
        }

        public IEnumerable<Models.BlackBoard> GetBlackBoards(int ModuleId)
        {
            using var db = _factory.CreateDbContext();
            return db.BlackBoard.Where(item => item.ModuleId == ModuleId).ToList();
        }

        public Models.BlackBoard GetBlackBoard(int BlackBoardId)
        {
            return GetBlackBoard(BlackBoardId, true);
        }

        public Models.BlackBoard GetBlackBoard(int BlackBoardId, bool tracking)
        {
            using var db = _factory.CreateDbContext();
            if (tracking)
            {
                return db.BlackBoard.Find(BlackBoardId);
            }
            else
            {
                return db.BlackBoard.AsNoTracking().FirstOrDefault(item => item.BlackBoardId == BlackBoardId);
            }
        }

        public Models.BlackBoard AddBlackBoard(Models.BlackBoard BlackBoard)
        {
            using var db = _factory.CreateDbContext();
            db.BlackBoard.Add(BlackBoard);
            db.SaveChanges();
            return BlackBoard;
        }

        public Models.BlackBoard UpdateBlackBoard(Models.BlackBoard BlackBoard)
        {
            using var db = _factory.CreateDbContext();
            db.Entry(BlackBoard).State = EntityState.Modified;
            db.SaveChanges();
            return BlackBoard;
        }

        public void DeleteBlackBoard(int BlackBoardId)
        {
            using var db = _factory.CreateDbContext();
            Models.BlackBoard BlackBoard = db.BlackBoard.Find(BlackBoardId);
            db.BlackBoard.Remove(BlackBoard);
            db.SaveChanges();
        }
    }
}