using data.DAO;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;

namespace data.Repository
{
    public class SQLPresenceRepository : IPresenceRepository
    {
        private readonly DatabaseContext _context;

        public SQLPresenceRepository(DatabaseContext context)
        {
            _context = context;
        }

        public IEnumerable<Diary> GetPresence(
            int groupId,
            int? subjectId = null,
            DateTime? date = null,
            int? studentId = null)
        {
            var query = _context.Diaries
                .Include(p => p.Student)
                .Include(p => p.StudentGroupSubject)
                    .ThenInclude(p => p.Subject)
                .Where(p => p.Student.GroupId == groupId);

            if (subjectId.HasValue)
                query = query.Where(p => p.StudentGroupSubject.Subject.Id == subjectId.Value);

            if (date.HasValue)
                query = query.Where(p => p.Date == DateOnly.FromDateTime(date.Value));

            if (studentId.HasValue)
                query = query.Where(p => p.Student.Id == studentId.Value);

            return query.ToList();
        }
    }
}