using e_suite.API.Common.repository;
using e_suite.Database.Audit;
using e_suite.Database.Core;
using e_suite.Database.Core.Extensions;
using e_suite.Workflow.Core;
using e_suite.Workflow.Core.Extensions;
using Microsoft.EntityFrameworkCore;

namespace e_suite.Modules.WorkflowTemplatesManager.Repository;

public interface IWorkflowConverter
{
    WorkflowVersion DeserialiseFromDatabase(e_suite.Database.Core.Tables.Workflow.WorkflowVersion dbVersion);

    Task<e_suite.Database.Core.Tables.Workflow.WorkflowVersion> SerialiseToDatabase(
        WorkflowVersion runtime,
        e_suite.Database.Core.Tables.Workflow.WorkflowVersion? dbObject = null,
        CancellationToken cancellationToken = default
    );
}
public class WorkflowConverter : IWorkflowConverter
{
    private readonly IDomainRepository _domainRepository;

    public WorkflowConverter(IDomainRepository domainRepository)
    {
        _domainRepository = domainRepository;
    }

    public WorkflowVersion DeserialiseFromDatabase(e_suite.Database.Core.Tables.Workflow.WorkflowVersion dbVersion)
    {
        var runtime = new WorkflowVersion
        {
            Id = dbVersion.Id,
            Guid = dbVersion.Guid,
            Version = dbVersion.Version,
            ActivityNameTemplate = dbVersion.ActivityNameTemplate,
            Description = dbVersion.Description,
            Domain = dbVersion.Domain.ToGeneralIdRef()!,
            Template = new WorkflowTemplate
            {
                Name = "Need to fix",
                Id = 1,
                Guid = Guid.Empty
            } // however you load templates
        };

        foreach (var def in dbVersion.Tasks)
        {
            var task = def.ToTask();
            runtime.Tasks.Add(task);
        }

        return runtime;
    }

    public async Task<e_suite.Database.Core.Tables.Workflow.WorkflowVersion> SerialiseToDatabase(WorkflowVersion runtime, e_suite.Database.Core.Tables.Workflow.WorkflowVersion? dbObject = null, CancellationToken cancellationToken = default)
    {
        if (runtime is null)
            throw new NullReferenceException();
        
        var domain = await _domainRepository.GetDomainById(runtime.Domain, cancellationToken);
        if (domain is null)
            throw new Exception($"Domain with id {runtime.Domain} not found.");

        var dbVersion = dbObject ?? new e_suite.Database.Core.Tables.Workflow.WorkflowVersion();

        if (dbObject == null)
        {
            dbVersion.Id = runtime.Id;
            dbVersion.Guid = runtime.Guid;
        }
        else
        {
            //note cannot move a version from one workflow to another, that requires a new version.
            //todo make sure that the Workflow is populated here.
            //dbVersion.Workflow = runtime.Template.ToGeneralIdRef()
        }

        dbVersion.Version = runtime.Version; //todo make sure that the version number get incremented somewhere logical.
        dbVersion.ActivityNameTemplate = runtime.ActivityNameTemplate;
        dbVersion.Description = runtime.Description;
        dbVersion.DomainId = domain.Id;
        dbVersion.Tasks = runtime.Tasks
            .Select(t => t.ToDefinition())
            .ToList();

        return dbVersion;
    }
}


public class WorkflowTemplateRepository : RepositoryBase, IWorkflowTemplateRepository
{
    public WorkflowTemplateRepository(IEsuiteDatabaseDbContext databaseDbContext) : base(databaseDbContext)
    {
    }
    
    public IQueryable<e_suite.Database.Core.Tables.Workflow.Workflow> GetWorkflows()
    {
        return DatabaseDbContext.Workflows
            .Include( x => x.Versions);
    }

    public IQueryable<e_suite.Database.Core.Tables.Workflow.WorkflowVersion> GetWorkflowVersions()
    {   
        return DatabaseDbContext.WorkflowVersions;
    }
    
    public async Task EditWorkflowVersionAsync(AuditUserDetails auditUserDetails, e_suite.Database.Core.Tables.Workflow.WorkflowVersion workflowVersion, CancellationToken cancellationToken)
    {
        await DatabaseDbContext.SaveChangesAsync(auditUserDetails, cancellationToken);
    }
}