using System;
using System.Collections.Generic;
using System.Data.OleDb;
using System.Text;
using System.Windows.Forms;

namespace Database
{
    class Plants : OleDBDataGridViewHandler
    {
        static OleDbCommand SelectCommand() {
            string command =
                "SELECT [F].[id], [PT].[data] AS [type], [L].[data] AS [location], [F].[number]" +
                "FROM[plants] AS[F], [plant_types] AS[PT], [locations] AS[L]" +
                "WHERE[type_id] = [PT].[id] AND[location_id] = [L].[id]";
            var result = new OleDbCommand(command, OleDBHandler.Connection);
            return result;
        }
        public Plants(DataGridView dataGridView) : base(SelectCommand(), "plants", dataGridView) { }
        private bool Exists(int typeId, int locationId) {
            string command = "SELECT COUNT(*) FROM [plants]" +
                $"WHERE [type_id] = {typeId} AND [location_id] = {locationId};";
            var result = OleDBHandler.Execute(command, OleDBHandler.ExecuteType.Scalar);
            if (Convert.ToInt32(result) > 0)
                return true;
            return false;
        }
        public void Insert(int number, int typeId, int locationId) {
            if (Exists(typeId, locationId) == true)
                return;
            (string, object) pair1 = ("type_id", typeId);
            (string, object) pair2 = ("location_id", locationId);
            (string, object) pair3 = ("number", number);
            OleDBHandler.Insert(nameTable, pair1, pair2, pair3);
            RefreshView();
        }
        public void Update(int number, int typeId, int locationId) {
            if (Exists(typeId, locationId) == true)
                return;
            int id = CurrentId();
            if (id < 0)
                return;
            (string, object) pair1 = ("type_id", typeId);
            (string, object) pair2 = ("location_id", locationId);
            (string, object) pair3 = ("number", number);
            OleDBHandler.Update(nameTable, id, pair1, pair2, pair3);
            RefreshView();
        }
    }
}