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 SavedLocationService : ISavedLocationService
    {
        private ISavedLocationRepository _savedLocationRepository;
        private IUnitOfWork _unitOfWork;

        public SavedLocationService(
            ISavedLocationRepository savedLocationRepository,
            IUnitOfWork unitOfWork)
        {
            _savedLocationRepository = savedLocationRepository;
            _unitOfWork = unitOfWork;
        }

        public async Task<IEnumerable<SavedLocation>> ListAllAsync()
        {
            try
            {
                return await _savedLocationRepository.ListAsync();
            }
            catch (Exception ex)
            {
                Log.Error(ex, "Failure retrieving Saved Locations");
                throw new ServerErrorException();
            }
        }

        public async Task<SavedLocation> GetAsync(int id)
        {
            SavedLocation savedLocation;
            try
            {
                savedLocation = await _savedLocationRepository.FindByIdAsync(id);
            }
            catch (Exception ex)
            {
                Log.Error(ex, $"Failure retrieving Saved Location with id: {id}");
                throw new NotFoundException($"Saved Location with id {id} not found");
            }

            if (savedLocation == null)
            {
                throw new NotFoundException($"Saved Location with id {id} not found");
            }

            return savedLocation;
        }

        public async Task<SavedLocation> SaveAsync(SavedLocation savedLocation)
        {
            try
            {
                var newSavedLocation = await _savedLocationRepository.AddAsync(savedLocation);
                await _unitOfWork.CompleteAsync();
                return newSavedLocation;
            }
            catch (Exception ex)
            {
                Log.Error(ex, $"Failure saving Saved Location {savedLocation}", savedLocation);
                throw new ServerErrorException();
            }
        }

        public async Task<SavedLocation> UpdateAsync(SavedLocation savedLocation)
        {
            var existing = await _savedLocationRepository.FindByIdAsync(savedLocation.ID);

            if (existing == null)
            {
                throw new NotFoundException($"Saved Location with id {savedLocation.ID} not found");
            }

            existing.Name = savedLocation.Name;
            existing.LocationType = savedLocation.LocationType;
            existing.Address_Line_1 = savedLocation.Address_Line_1;
            existing.Address_Line_2 = savedLocation.Address_Line_2;
            existing.City = savedLocation.City;
            existing.State = savedLocation.State;
            existing.ZIP = savedLocation.ZIP;
            existing.Country = savedLocation.Country;
            existing.Phone = savedLocation.Phone;
            existing.Fax = savedLocation.Fax;

            try
            {
                _savedLocationRepository.Update(existing);
                await _unitOfWork.CompleteAsync();
                return existing;
            }
            catch (SqlException ex)
            {
                Log.Error(ex, $"SQL Filure updating Saved Location: {savedLocation}", savedLocation);
                throw new ServerErrorException();
            }
            catch (Exception ex)
            {
                Log.Error(ex, $"Failure updating Saved Location {savedLocation}", savedLocation);
                throw new ServerErrorException();
            }
        }

        public async Task<SavedLocation> DeleteAsync(int id)
        {
            var existingSavedLocation = await _savedLocationRepository.FindByIdAsync(id);

            if (existingSavedLocation == null)
            {
                throw new NotFoundException($" Saved Location with id {id} not found.");
            }

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

    }
}