using System.Globalization;
using System.IO;
using CsvHelper;
using CsvHelper.Configuration;
using LCU.API.Internal.Operations.IncentiveApi.Models.Action;
using LCU.API.Internal.Operations.IncentiveApiLib.Repositories;
using LCU.Library.Internal.IncentiveApiModels.Entities;
using LCU.Library.Internal.IncentiveApiModels.Enums;
using LCU.API.Internal.Operations.IncentiveApi.Services.MicroApiServices;
using LCU.Library.Internal.IncentiveApiModels.Requests;
using LCU.API.Internal.Operations.IncentiveApi.Services.Transformations;
using LCU.Library.Internal.IncentiveApiModels.Results;
using LCU.Library.Internal.ApiResponse.Services;

namespace LCU.API.Internal.Operations.IncentiveApi.Services.Action;

public class ActionVehicleImportService : IActionVehicleImportService
{
    private readonly IUserRepository _userRepository;
    private readonly IActivityService _activityService;
    private readonly IDeadActivityService _deadActivityService;
    private readonly IFileOperationsApiService _fileOperationsApiService;
    private readonly ProcessResult _actionVehicleProcessResult;
    static readonly CultureInfo USEnglish = new CultureInfo("en-US");

    public ActionVehicleImportService(IUserRepository userRepository, IFileOperationsApiService fileOperationsApiService, IActivityService activityService, IDeadActivityService deadActivityService)
    {
        _userRepository = userRepository;
        _fileOperationsApiService = fileOperationsApiService;
        _activityService = activityService;
        _deadActivityService = deadActivityService;
        _actionVehicleProcessResult = new ProcessResult();
    }

    public async Task RunActionVehicleProcess(ActionVehicleRequest request)
    {
        try
        {
            var importedVehicleSales = await ImportTransactions<ActionSaleRow>(request);
            Log.Information($"Imported {importedVehicleSales.Count}  Action Vehicle Sales.");

            _actionVehicleProcessResult.MessageStack.Add($"Imported {importedVehicleSales.Count()} Action Vehicle Sales.");
            await QueueReturnResponse.QueueResponse(request, _actionVehicleProcessResult.Success, _actionVehicleProcessResult.MessageStack);
        }
        catch (Exception exception)
        {
            var message = $"There was an issue with handling Import Action Vehicle Sales Exception Message: {exception.Message}.";
            _actionVehicleProcessResult.MessageStack.Add(message);
            _actionVehicleProcessResult.Success = false;
            await QueueReturnResponse.QueueResponse(request, _actionVehicleProcessResult.Success, _actionVehicleProcessResult.MessageStack);
        }
    }

    public async Task<IReadOnlyCollection<Activity>> ImportTransactions<T>(ActionVehicleRequest request) where T : ActionSaleRow
    {
        var dynamicFileListRequest = request.ToDynamicActionVehicleFileListRequest();
        var files = await _fileOperationsApiService.BuildDynamicFileList(dynamicFileListRequest);

        var activity = new List<Activity>();
        foreach (var fileName in files)
        {
            var stringContent = await _fileOperationsApiService.GetFileContent($"{request.FinalBasePath}{fileName}");
            using var stringReader = new StringReader(stringContent);
            var config = new CsvConfiguration(CultureInfo.InvariantCulture)
            {
                Delimiter = ",",
                HasHeaderRecord = true,
                HeaderValidated = null,
                MissingFieldFound = null,
                IgnoreBlankLines = true
            };

            using var csv = new CsvReader(stringReader, config);
            var records = csv.GetRecords<T>().ToList();
            var allActivity = await CreateActivity(records);
            await _activityService.SaveActivityRangeAsync(allActivity);

            activity.AddRange(allActivity);
        }

        return activity;
    }

    public async Task<IReadOnlyCollection<Activity>> CreateActivity(IEnumerable<ActionSaleRow> transactions)
    {
        var activities = new List<Activity>();
        var deadActivities = new List<DeadActivity>();
        foreach (var actionSaleRow in transactions)
        {
            var activity = new Activity()
            {
                Product = Product.Vehicle,
                Type = ActivityType.Sale,
                State = ActivityState.Accepted,
                SourceSystem = SystemType.Action,
                SourceCreated = DateTime.Parse(actionSaleRow.OPEN_DATE),
                Accepted = DateTime.Parse(actionSaleRow.OPEN_DATE).Date.AddHours(12),
                SourceId = actionSaleRow.IndAppID,
                Detail = new ActivityDetail()
                {
                    AccountNumber = actionSaleRow.Account_Number,
                    MemberName = actionSaleRow.Borrower_Name,
                    AccountBalance = ParseMoneyDouble(actionSaleRow.IndAmtFinanced)
                },
                EmployeeEmail = null,
                EmployeeId = null,
                DepartmentId = -1
            };

            var employee = await FindEmployee(actionSaleRow.EmailAddress);
            if (employee == null)
            {
                Log.Warning($"Action Import, No user for {actionSaleRow.EmailAddress}. Saving as Dead Activity.");
                activity.EmployeeEmail = actionSaleRow.EmailAddress;
                deadActivities.Add(new DeadActivity(activity,
                    DeadActivityReason.MissingRequiredField,
                    $"Action Import, No user for {actionSaleRow.EmailAddress}")
                );
                continue;
            }

            activity.AppUserId = employee.Id;
            activity.EmployeeEmail = employee.AdEmail;
            activity.EmployeeId = employee.EmployeeId;

            var homeDept = employee.FindHomeDepartment();
            if (homeDept == null)
            {
                Log.Warning($"User has no reliably determinable home department, {employee.EmployeeId}. Saving as Dead Activity.");
                deadActivities.Add(new DeadActivity(activity,
                    DeadActivityReason.MissingRequiredField,
                    $"User has no reliably determinable home department, {employee.EmployeeId}. Saving as Dead Activity."));
                continue;
            }

            activity.DepartmentId = homeDept.DepartmentId;
            activities.Add(activity);
        }

        try
        {
            await _deadActivityService.SaveDeadActivityRange(deadActivities);
        }
        catch (Exception ex)
        {
            Log.Error(ex, "Failed to save dead activities from ActionVehicleImportService. Dead Activities will be lost.");
        }

        return activities;
    }

    public double? ParseMoneyDouble(string indAmtFinanced)
    {
        var parsed = decimal.Parse(indAmtFinanced, System.Globalization.NumberStyles.Currency, USEnglish);
        return (double)parsed;
    }

    private async Task<AppUser> FindEmployee(string employeeEmail)
    {
        try
        {
            return await _userRepository.FindUserByAdEmailAsync(employeeEmail);
        }
        catch (Exception ex)
        {
            Log.Error(ex, "Error when finding user by email in ActionVehicleImportService.");
            return null;
        }
    }
}