using ConstructionCompanyContracts.BindingModels;
using ConstructionCompanyContracts.ViewModels;
using ConstructionCompanyDataModels.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConstructionCompanyPsqlImplement.Models
{
    public class Position : IPositionModel
    {
        public string PositionName { get; private set; } = string.Empty;

        public double Salary { get; set; }

        public int Id { get; private set; }

        public static Position? Create(PositionBindingModel? model)
        {
            if (model == null)
            {
                return null;
            }
            return new Position()
            {
                Id = model.Id,
                PositionName = model.PositionName,
                Salary = model.Salary
            };
        }
        public void Update(PositionBindingModel? model)
        {
            if (model == null)
            {
                return;
            }
            PositionName = model.PositionName;
            Salary = model.Salary;
        }
        public static string CreateCommand(PositionBindingModel? model)
        {
            if (model == null)
            {
                return "";
            }
            return $"INSERT INTO position(name, salary) VALUES(\'{model.PositionName}\', {model.Salary});";
        }
        public static string UpdateCommand(PositionBindingModel? model)
        {
            if (model == null)
            {
                return "";
            }
            return $"UPDATE position SET \"name\" = \'{model.PositionName}\', salary = {model.Salary} WHERE id = {model.Id}";
        }
        public static string DeleteCommand(PositionBindingModel? model)
        {
            if (model == null)
            {
                return "";
            }
            return $"DELETE FROM postition WHERE id = {model.Id}";
        }

        public static string PositionsAVGCommnad(DateTime dateFrom, DateTime dateTo)
        {
            return $"SELECT \"position\".id, AVG(material_order.quantiny) FROM \"position\"\r\nJOIN employee ON employee.position_id = \"position\".id\r\nJOIN employee_order ON employee_order.employee_id = employee.id\r\nJOIN \"order\" ON \"order\".id = employee_order.order_id\r\nJOIN material_order ON material_order.order_id = \"order\".id\r\nJOIN material ON material.id = material_order.material_id\r\nWHERE \"order\".date_begin >= '{dateFrom}' AND \"order\".date_begin <= '{dateTo}'\r\nGROUP BY \"position\".id";
        }

        public PositionViewModel GetViewModel => new()
        {
            Id = Id,
            PositionName = PositionName,
            Salary = Salary
        };
    }
}