using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Threading.Tasks;
using LCU.API.Collections.RepoApi.Exceptions;
using LCU.Shared.Collections.RepoApiLib.Models;
using LCU.Shared.Collections.RepoApiLib.Repositories;
using Serilog;

namespace LCU.API.Collections.RepoApi.Services
{
    public class AuctionHouseService : IAuctionHouseService
    {
        private readonly IAuctionHouseRepository _auctionHouseRepository;
        private readonly IUnitOfWork _unitOfWork;

        public AuctionHouseService(
            IAuctionHouseRepository auctionHouseRepository,
            IUnitOfWork unitOfWork)
        {
            _auctionHouseRepository = auctionHouseRepository;
            _unitOfWork = unitOfWork;
        }

        public async Task<IEnumerable<AuctionHouse>> ListAllAsync()
        {
            try
            {
                return await _auctionHouseRepository.ListAllAsync();
            }
            catch (Exception ex)
            {
                Log.Error(ex, "Failure retrieving Auctions");
                throw new ServerErrorException();
            }
        }

        public async Task<AuctionHouse> GetAsync(string id)
        {
            AuctionHouse auction;
            try
            {
                auction = await _auctionHouseRepository.FindByIdAsync(id);
            }
            catch (Exception ex)
            {
                Log.Error(ex, $"Failure retrieving Auction with id: {id}");
                throw new ServerErrorException();
            }

            if (auction == null)
            {
                throw new NotFoundException($"Auction with id {id} not found.");
            }

            return auction;
        }

        public async Task<AuctionHouse> SaveAsync(AuctionHouse auction)
        {
            try
            {
                await _auctionHouseRepository.AddAsync(auction);
                await _unitOfWork.CompleteAsync();

                return auction;
            }
            catch (Exception ex)
            {
                Log.Error(ex, "Failure saving Auction", auction);
                throw new ServerErrorException();
            }
        }

        public async Task<AuctionHouse> UpdateAsync(AuctionHouse auction)
        {
            AuctionHouse existing;
            try
            {
                existing = await _auctionHouseRepository.FindByIdAsync(auction.AuctionID);
            }
            catch (Exception ex)
            {
                Log.Error(ex, $"Failed to find existing Auction House to update with id: {auction.AuctionID}", auction);
                throw new ServerErrorException();
            }
            

            if (existing == null)
            {
                throw new NotFoundException($"Auction with id {auction.AuctionID} not found.");
            }

            existing.Name = auction.Name;
            existing.Active = auction.Active;
            existing.Address_Line_1 = auction.Address_Line_1;
            existing.Address_Line_2 = auction.Address_Line_2;
            existing.City = auction.City;
            existing.State = auction.State;
            existing.ZIP = auction.ZIP;
            existing.Country = auction.Country;
            existing.Phone = auction.Phone;
            existing.Fax = auction.Fax;
            existing.Latitude = auction.Latitude;
            existing.Longitude = auction.Longitude;

            try
            {
                _auctionHouseRepository.Update(existing);
                await _unitOfWork.CompleteAsync();
                return (existing);
            }
            catch (SqlException ex)
            {
                Log.Error(ex, $"SQL Failure updating Auction: {auction}", auction);
                throw new ServerErrorException();
            }
            catch (Exception ex)
            {
                Log.Error(ex, $"Failure updating Auction {auction}", auction);
                throw new ServerErrorException();
            }
        }

        public async Task<AuctionHouse> DeleteAsync(string id)
        {
            AuctionHouse existingAuction;
            try
            {
                existingAuction = await _auctionHouseRepository.FindByIdAsync(id);
            }
            catch (Exception ex)
            {
                Log.Error(ex, $"Failed to find existing Auction House to delete with id: {id}");
                throw new ServerErrorException();
            }

            if (existingAuction == null)
            {
                throw new NotFoundException($"Auction with id {id} not found.");
            }

            try
            {
                _auctionHouseRepository.Remove(existingAuction);
                await _unitOfWork.CompleteAsync();
                return existingAuction;
            }
            catch (SqlException ex)
            {
                Log.Error(ex, $"SQL Failure deleting Auction with id: {id}");
                throw new ServerErrorException();
            }
            catch (Exception ex)
            {
                Log.Error(ex, $"Failure deleting Auction with id : {id}");
                throw new ServerErrorException();
            }
        }
    }
}