using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using _0_Framework.Application;
using Company.Domain.FileAlert;
using CompanyManagment.App.Contracts.File1;
using CompanyManagment.App.Contracts.FileAlert;
using CompanyManagment.App.Contracts.FileState;

namespace CompanyManagment.Application;

public class FileAlertApplication : IFileAlertApplication
{
    private readonly IFileAlertRepository _fileAlertRepository;
    private readonly IFileStateApplication _fileStateApplication;
    private readonly IFileApplication _fileApplication;

    public FileAlertApplication(IFileAlertRepository fileAlertRepository, IFileStateApplication fileStateApplication, IFileApplication fileApplication)
    {
        _fileAlertRepository = fileAlertRepository;
        _fileStateApplication = fileStateApplication;
        _fileApplication = fileApplication;
    }

    public OperationResult Create(CreateFileAlert command)
    {
        var operation = new OperationResult();

        //TODO if
        //if(_BoardRepository.Exists(x=>x.Branch == command.Branch))
        //    operation.Failed("fail message")

        var fileAlert = new FileAlert(command.File_Id, command.FileState_Id, command.AdditionalDeadline);
        _fileAlertRepository.Create(fileAlert);
        _fileAlertRepository.SaveChanges();

            

        return operation.Succcedded( fileAlert.id);
    }

    public OperationResult Edit(EditFileAlert command)
    {
        var operation = new OperationResult();
        var fileAlert = _fileAlertRepository.Get(command.Id);

        //TODO

        //fileAlert.Edit(command.Alert, command.Type);
        _fileAlertRepository.SaveChanges();

        return operation.Succcedded(fileAlert.id);
    }

    public OperationResult Remove(long id)
    {
        var operation = new OperationResult();

        _fileAlertRepository.Remove(id);
        _fileAlertRepository.SaveChanges();

        return operation.Succcedded(-1,"عنوان با موفقیت حذف شد");
    }

    public FileAlertViewModel GetDetails(long id)
    {
        var fileAlert = _fileAlertRepository.GetDetails(id);
        fileAlert.FileState = _fileStateApplication.GetDetails(fileAlert.FileState_Id);
        fileAlert.File = _fileApplication.GetDetails(fileAlert.File_Id);

        return fileAlert;
    }

    public List<EditFileAlert> Search(FileAlertSearchModel searchModel)
    {
        return _fileAlertRepository.Search(searchModel);
    }

    public List<FileAlertViewModel> GetFilesAlerts(List<FileViewModel> files)
    {
        var fileStates = _fileStateApplication.Search(new FileStateSearchModel());
        var fileAlertsVM = new List<FileAlertViewModel>();

#if DEBUG
        files = files.Take(5).ToList();
#endif
        foreach (var item in files)
        {
            var file = _fileApplication.GetFileDetails(item);
            file.State = _fileStateApplication.GetFileState(file);

            if (file.State == 0)
                continue;
            //
            file.StateDate = _fileStateApplication.GetFileStateDate(file);
            var today = DateTime.Now.Date;

            var fileAlerts = Search(new FileAlertSearchModel { File_Id = file.Id, FileState_Id = file.State });

            if (today < file.StateDate)
                //TODO
                //check Alerts table
                continue;

            if (fileAlerts.Count == 0)
            {
                var dueDate = file.StateDate + TimeSpan.FromDays(fileStates.Where(x => x.State == file.State).FirstOrDefault().Deadline);
                var workingDaysDifference = Tools.GetWorkingDaysDifference(today, dueDate);

                if (workingDaysDifference <= 1)
                {
                    var fileAlertId = Create(new CreateFileAlert
                    {
                        File_Id = file.Id,
                        FileState_Id = file.State,
                        AdditionalDeadline = 0
                    }).SendId;

                    var fileAlert = GetDetails(fileAlertId);
                    if (workingDaysDifference < 0)
                        fileAlert.IsExpired = true;

                    fileAlertsVM.Add(fileAlert);
                }
            }

            else if (fileAlerts.Count == 1)
            {
                var dueDate = file.StateDate + TimeSpan.FromDays(fileStates.Where(x => x.State == file.State).FirstOrDefault().Deadline);
                var workingDaysDifference = Tools.GetWorkingDaysDifference(today, dueDate);

                if (workingDaysDifference <= 1)
                {
                    var fileAlert = GetDetails(fileAlerts[0].Id);
                    if (workingDaysDifference < 0)
                        fileAlert.IsExpired = true;

                    fileAlertsVM.Add(fileAlert);
                }
            }

            else
            {
                var totalAdditionalDeadline = fileAlerts.Sum(x => x.AdditionalDeadline);
                var dueDate = file.StateDate + TimeSpan.FromDays(fileStates.Where(x => x.State == file.State).FirstOrDefault().Deadline) + TimeSpan.FromDays(totalAdditionalDeadline);
                var workingDaysDifference = Tools.GetWorkingDaysDifference(today, dueDate);

                if (workingDaysDifference <= 1)
                {
                    var fileAlert = GetDetails(fileAlerts.LastOrDefault().Id);
                    if (workingDaysDifference < 0)
                        fileAlert.IsExpired = true;

                    fileAlertsVM.Add(fileAlert);
                }
            }
        }

        return fileAlertsVM;
    }

    public int getMaximumAdditionalDeadlineTimes(int additionalDeadline)
    {

        switch (additionalDeadline)
        {
            case 2:
                return FileAlertEnums.MAX_2_DAYSEXTENSION;

            case 5:
                return FileAlertEnums.MAX_5_DAYSEXTENSION;

            case 10:
                return FileAlertEnums.MAX_10_DAYSEXTENSION;

        }

        return 0;
    }

    public async Task<List<FileAlertViewModel>> GetFileAlerts(FileAlertSearchModel searchModel)
    {
        return await _fileAlertRepository.GetFileAlerts(searchModel);
    }
}