// Copyright (C) Stichting Deltares 2024. All rights reserved.
// 
// This file is part of the Dam Engine.
// 
// The Dam Engine is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero 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 Affero General Public License for more details.
// 
// You should have received a copy of the GNU Affero 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 System;
using System.Collections.Generic;
using Deltares.DamEngine.Calculators.DikesDesign;
using Deltares.DamEngine.Calculators.DikesOperational;
using Deltares.DamEngine.Data.General;
using Deltares.DamEngine.Data.Standard.Calculation;
using Deltares.DamEngine.Data.Standard.Logging;
using Deltares.DamEngine.Interface.Properties;
using Deltares.DamEngine.Io;
using Deltares.DamEngine.Io.XmlInput;
using Deltares.DamEngine.Io.XmlOutput;

namespace Deltares.DamEngine.Interface;

/// <summary>
/// The main interface class for accessing the Dam Engine
/// </summary>
public class EngineInterface
{
    /// <summary>
    /// Initializes a new instance of the <see cref="EngineInterface"/> class.
    /// </summary>
    /// <param name="modelInput">Xml string containing the model input.</param>
    public EngineInterface(string modelInput)
    {
        if (String.IsNullOrEmpty(modelInput))
        {
            throw new EngineInterfaceException(Resources.Error_EmptyInputString);
        }

        Input input = DamXmlSerialization.LoadInputFromXmlString(modelInput);
        DamProjectData = FillDamFromXmlInput.CreateDamProjectData(input);
        SendMessage(new LogMessage
        {
            MessageType = LogMessageType.Info,
            Message = Resources.ModelAccepted
        });
    }

    /// <summary>
    /// Gets or sets the progress delegate.
    /// </summary>
    /// <value>
    /// The progress delegate.
    /// </value>
    public ProgressDelegate ProgressDelegate { get; set; }

    /// <summary>
    /// Gets or sets the send message delegate.
    /// </summary>
    /// <value>
    /// The send message delegate.
    /// </value>
    public SendMessageDelegate SendMessageDelegate { get; set; }

    /// <summary>
    /// Gets or sets the user abort delegate.
    /// </summary>
    /// <value>
    /// The user abort delegate.
    /// </value>
    public UserAbortDelegate UserAbortDelegate { get; set; }

    /// <summary>
    /// Gets or sets the dam project data.
    /// </summary>
    /// <value>
    /// The dam project data.
    /// </value>
    public DamProjectData DamProjectData { get; set; }

    /// <summary>
    /// Validates the model.
    /// </summary>
    /// <returns>Validation messages in an XML string</returns>
    public string Validate()
    {
        SendMessage(new LogMessage
        {
            MessageType = LogMessageType.Info,
            Message = Resources.StartValidation
        });
        List<LogMessage> validationMessages = null;

        try
        {
            bool isOperational = DamProjectData.DamProjectType == DamProjectType.Operational;
            bool isPiping = DamProjectData.DamProjectCalculationSpecification.CurrentSpecification.FailureMechanismSystemType == FailureMechanismSystemType.Piping;
            DamProjectData.Dike.Validate(isOperational, isPiping);
        }
        catch (Exception e)
        {
            var validationMessage = new LogMessage(LogMessageType.Error, null, e.Message);
            validationMessages = new List<LogMessage>
            {
                validationMessage
            };
            DamProjectData.CalculationMessages = new List<LogMessage>();
        }

        // Local validation can give messages and these have to be added to the results but note that there
        // already can be messages added by instantiation of the interface too. So add the local to the global
        if (validationMessages != null && validationMessages.Count > 0)
        {
            if (DamProjectData != null && DamProjectData.CalculationMessages != null)
            {
                DamProjectData.CalculationMessages.AddRange(validationMessages);
            }
        }

        // Now check if there are any messages at all, if so return them.
        if (DamProjectData != null && DamProjectData.CalculationMessages != null && DamProjectData.CalculationMessages.Count > 0)
        {
            Output output = FillXmlOutputFromDam.CreateOutput(DamProjectData);
            string outputXml = DamXmlSerialization.SaveOutputAsXmlString(output);
            SendMessage(new LogMessage
            {
                MessageType = LogMessageType.Info,
                Message = Resources.EndValidation
            });
            return outputXml;
        }

        SendMessage(new LogMessage
        {
            MessageType = LogMessageType.Info,
            Message = Resources.EndValidation
        });
        return null;
    }

    /// <summary>
    /// Runs this instance.
    /// </summary>
    /// <returns>Returns the output in an XML string</returns>
    public string Run()
    {
        string outputXml;
        SendMessage(new LogMessage
        {
            MessageType = LogMessageType.Info,
            Message = Resources.StartCalculation
        });

        switch (DamProjectData.DamProjectType)
        {
            case DamProjectType.Operational:
                var operationalCalculator = new OperationalCalculator();
                operationalCalculator.Execute(DamProjectData);
                break;
            case DamProjectType.Design:
                var designCalculator = new DesignCalculator();
                designCalculator.RegisterProgress(ProgressDelegate);
                designCalculator.Execute(DamProjectData);
                break;
        }

        Output output = FillXmlOutputFromDam.CreateOutput(DamProjectData);
        outputXml = DamXmlSerialization.SaveOutputAsXmlString(output);
        SendMessage(new LogMessage
        {
            MessageType = LogMessageType.Info,
            Message = Resources.EndCalculation
        });
        return outputXml;
    }

    private void SendMessage(LogMessage logMessage)
    {
        SendMessageDelegate?.Invoke(logMessage);
    }

    private void Progress(double progress)
    {
        ProgressDelegate?.Invoke(progress);
    }

    private bool UserAbort()
    {
        if (UserAbortDelegate != null)
        {
            return UserAbortDelegate();
        }

        return false;
    }
}