using MySql.Data.MySqlClient;
using PaymentLogs.Domain;
using PaymentLogs.Utils;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Policy;
using System.Text;
using System.Threading.Tasks;

namespace PaymentLogs.Repositories
{
    internal class StudentRepo : Repo<int, Student>
    {

        public override void Load()
        {
            DataBase db = new DataBase();
            db.openConnection();
            _data.Clear();
            string sql = " SELECT * FROM students  ";
            MySqlCommand cmd = new MySqlCommand(sql, db.getConnection());
            MySqlDataReader reader = cmd.ExecuteReader();

            while (reader.Read())
            {
                Student student = new Student()
                {
                    Id = reader.GetInt32("id"),
                    FCs = reader.GetString("fcs"),
                    dateOfBirth = DateTime.ParseExact(reader.GetString("date_of_birth"), "yyyy-MM-dd",null),
                    Address = reader.GetString("address"),
                    CourseId = reader.GetInt32("course_id"),
                    Paid = reader.GetInt32("paid")

                };
                _data[student.Id] = student;
            }
            db.closeConnection();
        }



        public override void Save()
        {
            DataBase db = new DataBase();
            db.openConnection();
            foreach (Student student in All())
            {
                string sql = $" INSERT INTO `students` (`id`, `fcs`, `date_of_birth`, `address`, `course_id`, `paid`) " +
                $"VALUES ('{student.Id}','{student.FCs}','{ String.Format("{0:yyyy-MM-dd}", student.dateOfBirth) }', '{student.Address}'," +
                $"'{student.CourseId}', '{student.Paid}') " +
                $"ON DUPLICATE KEY UPDATE `fcs`='{student.FCs}', `date_of_birth`='{String.Format("{0:yyyy-MM-dd}", student.dateOfBirth)}'," +
                $"`address`='{student.Address}', `course_id`='{student.CourseId}', `paid`='{student.Paid}'";
                MySqlCommand cmd = new MySqlCommand(sql, db.getConnection());
                cmd.ExecuteNonQuery();
            }
           
            
            db.closeConnection();
        }
    }
}