// Copyright (C) Stichting Deltares 2016. All rights reserved.
//
// This file is part of Ringtoets.
//
// Ringtoets is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// All names, logos, and references to "Deltares" are registered trademarks of
// Stichting Deltares and remain full property of Stichting Deltares at all times.
// All rights reserved.

using Core.Common.Base.Service;
using Ringtoets.HydraRing.Calculation.Services;

namespace Ringtoets.HydraRing.Calculation.Activities
{
    /// <summary>
    /// Base implementation of an <see cref="Activity"/> for running calculations via Hydra-Ring.
    /// </summary>
    public abstract class HydraRingActivityBase : Activity
    {
        protected override void OnCancel()
        {
            HydraRingCalculationService.CancelRunningCalculation();
        }

        protected override void OnRun()
        {
            if (!Validate())
            {
                State = ActivityState.Failed;
            }
            else
            {
                PerformCalculation();
            }
        }

        /// <summary>
        /// Updates the progress text using the parameters in a predefined format.
        /// </summary>
        /// <param name="currentStepName">A short description of the current step.</param>
        /// <param name="currentStep">The number of the current step.</param>
        /// <param name="totalSteps">The total numbers of steps.</param>
        protected void UpdateProgressText(string currentStepName, int currentStep, int totalSteps)
        {
            ProgressText = string.Format("Stap {0} van {1} | {2}", currentStep, totalSteps, currentStepName);
        }

        /// <summary>
        /// Performs the calculation. May throw exceptions, which will result in a <see cref="ActivityState.Failed"/>
        /// state for the <see cref="HydraRingActivityBase"/>.
        /// </summary>
        protected abstract void PerformCalculation();

        /// <summary>
        /// Performs validation over the input of the <see cref="HydraRingActivityBase"/>. If the input is not valid
        /// then <c>false</c> is returned and the problems are logged.
        /// </summary>
        /// <returns><c>true</c> if no validation problems were found, <c>false</c> otherwise.</returns>
        protected virtual bool Validate()
        {
            return true;
        }
    }
}