using InnovEnergy.App.Backend.DataTypes;
using InnovEnergy.App.Backend.DataTypes.Methods;
using InnovEnergy.App.Backend.Relations;
namespace InnovEnergy.App.Backend.Database;

public static partial class Db 
{
    //Since we do not want to stress the memory in the VM a lot, we make a snapshot of the database every 100 transactions.
    private static int _backupCounter = 0;
    private static void Backup()
    {
        _backupCounter++;
        if (_backupCounter > 100)
        {
            _backupCounter = 0;
            BackupDatabase();
        }
    }
    public static Boolean Delete(Folder folder)
    {
        var deleteSuccess= RunTransaction(DeleteFolderAndAllItsDependencies);
        if (deleteSuccess)
        {
            Backup();
        }

        return deleteSuccess;

        Boolean DeleteFolderAndAllItsDependencies()
        {
            return folder
                  .DescendantFoldersAndSelf()
                  .All(DeleteDescendantFolderAndItsDependencies);
        }
        
        Boolean DeleteDescendantFolderAndItsDependencies(Folder f)
        {
            FolderAccess  .Delete(r => r.FolderId == f.Id);
            Installations.Delete(r => r.ParentId == f.Id);
            var delete = Folders.Delete(r => r.Id == f.Id);            
            
            return delete>0;
        }
    }
    
    public static Boolean Delete(Error errorToDelete)
    {
        var deleteSuccess = RunTransaction(DeleteError);
        
        if (deleteSuccess)
            Backup();
        return deleteSuccess;
        
        
        Boolean DeleteError()
        {
            return Errors.Delete(error => error.Id == errorToDelete.Id) >0;
        }
    }
    
    public static Boolean Delete(UserAction actionToDelete)
    {
        var deleteSuccess = RunTransaction(DeleteAction);
        
        
        if (deleteSuccess)
            Backup();
        return deleteSuccess;
        
        
        Boolean DeleteAction()
        {
            return UserActions.Delete(action => action.Id == actionToDelete.Id) >0;
            
        }
    }
    
    public static Boolean Delete(Warning warningToDelete)
    {
        var deleteSuccess = RunTransaction(DeleteWarning);
        if (deleteSuccess)
            Backup();
        return deleteSuccess;
        
        
        Boolean DeleteWarning()
        {
            return Warnings.Delete(warning => warning.Id == warningToDelete.Id) >0;
        }
    }
    
    public static Boolean Delete(Installation installation)
    {
        var deleteSuccess = RunTransaction(DeleteInstallationAndItsDependencies);
        if (deleteSuccess)
            Backup();
        return deleteSuccess;
        
        
        Boolean DeleteInstallationAndItsDependencies()
        {
            InstallationAccess.Delete(i => i.InstallationId == installation.Id);
            if (installation.Product == 0)
            {
                //For Salimax, delete the OrderNumber2Installation entries associated with this installation id.
                OrderNumber2Installation.Delete(i => i.InstallationId == installation.Id);
            }
            
            return Installations.Delete(i => i.Id == installation.Id) > 0;
        }
    }

    public static Boolean Delete(User user)
    {
        var deleteSuccess = RunTransaction(DeleteUserAndHisDependencies);
        if (deleteSuccess)
            Backup();
        return deleteSuccess;
        
        Boolean DeleteUserAndHisDependencies()
        {
            FolderAccess      .Delete(u => u.UserId == user.Id);
            InstallationAccess.Delete(u => u.UserId == user.Id);
            return Users.Delete(u => u.Id == user.Id) > 0;
        }
    }
    
    
    #pragma warning disable CS0618
    
    // private!!
    private static Boolean Delete(Session session)
    {
        var delete = Sessions.Delete(s => s.Id == session.Id) > 0;
        if (delete) 
            Backup();
        return delete;
    }

    public static void Delete(OrderNumber2Installation relation)
    {
        OrderNumber2Installation.Delete(s => s.InstallationId == relation.InstallationId && s.OrderNumber == relation.OrderNumber);
    }
}