using Newtonsoft.Json;
using System;
using System.IO;
using LCU.Api.Internal.FileOperations.Validations;
using LCU.Library.Internal.FileOperationsModels.Models;
using LCU.Library.Internal.FileOperationsModels.Shared;
using LCU.Library.Internal.LCUServiceFactory.Configurations;

namespace LCU.Api.Internal.FileOperations.Services.FileActionServices;

public class ModifyFileService : FileActionService, IFileActionService, IActionService<ModifyFileRequest>
{
	public ModifyFileService(ServicesFactoryConfiguration servicesFactoryConfiguration)
        : base(servicesFactoryConfiguration)
	{
	}

	public RequestResponse ExecuteAction(QueueRequest queueRequest)
    {
        var requestResponse = new RequestResponse();
        try
        {
            var fileRequest = JsonConvert.DeserializeObject<ModifyFileRequest>(queueRequest.Request);
            var requests = DynamicNameBuilder.BuildListOfRequest(fileRequest);

            requestResponse = FileValidation.ValidateFileRequestsWithinLimit(requests, fileRequest.MaxAmountOfFiles, requestResponse);

            foreach (var request in requests)
            {
                var temporaryRequestResponse = PerformRequest(request);
                if (!temporaryRequestResponse.IsSuccessful)
                {
                    requestResponse.IsSuccessful = fileRequest.SucceedOnError;
                    if (fileRequest.SucceedOnError)
                    {
                        requestResponse.MessageStack.Add("Succeed On Error is set.");
                    }

                    requestResponse.MessageStack.AddRange(temporaryRequestResponse.MessageStack);
                }
            }

            requestResponse.ReturnResponse = fileRequest;
            return requestResponse;
        }
        catch (Exception exception)
        {
            return RequestResponseHelper.ExceptionUpdateRequestResponse(requestResponse,
                                                                   queueRequest.FileOperationType,
                                                                   exception.Message);
        }
    }

    public RequestResponse PerformRequest(ModifyFileRequest request)
    {
        return OperationService.PerformOperation(request, IsRequestValid, ModifyFile);
    }

    private void ModifyFile(ModifyFileRequest request)
    {
        try
        {
            File.Move(request.OriginalSource, request.FinalSource);
        }
        catch (Exception exception)
        {
            throw new Exception($"Exception thrown while trying to ExecuteRequestAction. " +
                                $"Request: {JsonConvert.SerializeObject(request)}" +
                                $"ExceptionMessage: {exception.Message}");
        }
    }

    public RequestResponse PreQueueValidation(ModifyFileRequest originalRequest)
    {
        var requestResponse = new RequestResponse();
        var requestList = DynamicNameBuilder.BuildListOfRequest(originalRequest);
        requestResponse = FileValidation.ValidateFileRequestsWithinLimit(requestList, originalRequest.MaxAmountOfFiles, requestResponse);
        foreach (var request in requestList)
        {
            requestResponse = IsRequestValid(request, requestResponse);
        }

        return requestResponse;
    }

    public RequestResponse IsRequestValid(ModifyFileRequest fileRequest, RequestResponse requestResponse)
    {
        if (fileRequest.SucceedOnError)
        {
            return requestResponse;
        }

        requestResponse = FileValidation.ValidateDirectoryExists(fileRequest.SourcePath, requestResponse);
        requestResponse = FileValidation.ValidateFileExists(fileRequest.OriginalSource, requestResponse);
        requestResponse = FileValidation.ValidateFileNotExists(fileRequest.FinalSource, requestResponse);

        return requestResponse;
    }
}