Data-Coupler/Data_Coupler/Extensions/DataCoupler/RESTMethod.cs

using System;
using System.ComponentModel;
using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Forms;
using Microsoft.JSInterop;
using Microsoft.Extensions.Logging;
using CredentialManager.Models;
using DataConnection.REST.Interfaces;
using DataConnection.REST.Models;
using DataConnection.CredentialManagement.Interfaces;
using DataConnection.Interfaces;
using Data_Coupler.Services;
using Data_Coupler.Models;

namespace Data_Coupler.Pages;

public partial class DataCoupler : ComponentBase
{
    // ===== PROPRIETÀ REST =====
    
    // Credenziali REST
    protected List<RestApiCredential> restApiCredentials = new();
    protected string selectedRestCredential = "";
    
    // Stato connessioni REST
    protected bool isConnectingRest = false;
    protected bool isRestConnected = false;
    protected string restErrorMessage = "";
    
    // REST discovery
    protected List<RestEntitySummary> restEntities = new();
    protected RestEntitySummary? selectedRestEntity = null;
    protected RestEntityInfo? restEntityDetails = null;
    protected string restSearchTerm = "";
    
    // Proprietà di mapping REST
    protected string selectedRestProperty = "";
    
    // Servizi REST
    protected IRestMetadataDiscovery? currentRestDiscovery = null;
    protected IRestServiceClient? currentRestClient = null;
    
    // ===== METODI REST =====
    
    /// <summary>
    /// Carica le credenziali REST API
    /// </summary>
    protected async Task LoadRestCredentials()
    {
        try
        {
            restApiCredentials = await CredentialService.GetAllRestApiCredentialsAsync();
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Errore nel caricamento delle credenziali REST");
            throw;
        }
    }
    
    /// <summary>
    /// Gestisce il cambio di credenziale REST
    /// </summary>
    private void OnRestCredentialChanged(ChangeEventArgs e)
    {
        var newCredential = e.Value?.ToString() ?? "";

        // Clear the cache if we're switching to a different credential
        if (!string.IsNullOrEmpty(selectedRestCredential) && selectedRestCredential != newCredential)
        {
            ConnectionFactory.ClearRestClientCache(selectedRestCredential);
            Logger.LogInformation("Cleared REST client cache for credential: {CredentialName}", selectedRestCredential);
        }

        selectedRestCredential = newCredential;
        ResetRestState();
    }
    
    /// <summary>
    /// Resetta lo stato REST
    /// </summary>
    protected void ResetRestState()
    {
        isRestConnected = false;
        restEntities.Clear();
        selectedRestEntity = null;
        restEntityDetails = null;
        restSearchTerm = "";
        restErrorMessage = "";
        currentRestDiscovery = null;
        currentRestClient = null;

        // Clear mappings when resetting REST state - handled by main class
        // ClearAllMappings();
    }
    
    /// <summary>
    /// Connette al servizio REST API
    /// </summary>
    protected async Task ConnectToRestApi()
    {
        if (string.IsNullOrEmpty(selectedRestCredential))
            return;

        isConnectingRest = true;
        restErrorMessage = "";

        try
        {
            // Trova la credenziale
            var credential = restApiCredentials.FirstOrDefault(c => c.Name == selectedRestCredential);
            if (credential == null)
            {
                restErrorMessage = "Credenziale REST API non trovata";
                return;
            }

            // Test della connessione
            var (success, message) = await CredentialService.TestRestApiConnectionAsync(credential.Name);
            if (!success)
            {
                restErrorMessage = $"Connessione fallita: {message}";
                return;
            }

            // Crea i client REST usando il factory con le credenziali complete
            currentRestClient = await ConnectionFactory.CreateRestServiceClientAsync(selectedRestCredential);
            currentRestDiscovery = await ConnectionFactory.CreateRestMetadataDiscoveryAsync(selectedRestCredential);

            Logger.LogInformation("Iniziando autenticazione per il servizio REST {ServiceType} con credenziale: {CredentialName}", credential.ServiceType, selectedRestCredential);

            // Autenticazione prima del discovery
            var authResult = await currentRestClient.AuthenticateAsync();
            if (!authResult)
            {
                Logger.LogWarning("Autenticazione fallita per il servizio REST {ServiceType}", credential.ServiceType);
                restErrorMessage = "Autenticazione fallita per il servizio REST";
                return;
            }

            Logger.LogInformation("Autenticazione completata con successo per il servizio REST {ServiceType}", credential.ServiceType);

            // Discovery delle entità disponibili
            Logger.LogInformation("Iniziando discovery delle entità REST...");
            var entities = await currentRestDiscovery.DiscoverEntitiesAsync();

            restEntities = entities.Select(e => new RestEntitySummary
            {
                Name = e.Name,
                Label = e.Name, // Use Name as Label since RestEntityInfo doesn't have Label
                Description = "" // RestEntityInfo doesn't have Description
            }).ToList();
            isRestConnected = true;

            Logger.LogInformation("Discovery completato: trovate {EntityCount} entità REST", restEntities.Count);
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Errore nella connessione al servizio REST {ServiceType}", selectedRestCredential);
            restErrorMessage = $"Errore nella connessione: {ex.Message}";
        }
        finally
        {
            isConnectingRest = false;
            StateHasChanged();
        }
    }
    
    /// <summary>
    /// Seleziona un'entità REST
    /// </summary>
    protected async Task SelectRestEntity(RestEntitySummary entity)
    {
        selectedRestEntity = entity;

        // Clear mappings when changing entity - handled by main class
        // ClearAllMappings();

        try
        {
            if (currentRestDiscovery != null)
            {
                // Discovery dei dettagli dell'entità
                restEntityDetails = await currentRestDiscovery.DiscoverEntityDetailsAsync(entity.Name);
            }
            else
            {
                restErrorMessage = "Servizio di discovery REST non disponibile";
                return;
            }
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Errore nel caricamento dettagli entità {EntityName}", entity.Name);
            restErrorMessage = $"Errore nel caricamento dettagli entità: {ex.Message}";
        }
    }
    
    /// <summary>
    /// Filtra le entità REST in base al termine di ricerca
    /// </summary>
    private IEnumerable<RestEntitySummary> GetFilteredRestEntities()
    {
        if (string.IsNullOrEmpty(restSearchTerm))
            return restEntities;

        return restEntities.Where(entity =>
            entity.Name.Contains(restSearchTerm, StringComparison.OrdinalIgnoreCase) ||
            (!string.IsNullOrEmpty(entity.Label) && entity.Label.Contains(restSearchTerm, StringComparison.OrdinalIgnoreCase)));
    }
    
    /// <summary>
    /// Applica il filtro alle entità REST
    /// </summary>
    private async Task FilterRestEntities(ChangeEventArgs e)
    {
        restSearchTerm = e.Value?.ToString() ?? "";
        await InvokeAsync(StateHasChanged);
    }
    
    /// <summary>
    /// Pulisce la ricerca delle entità REST
    /// </summary>
    private async Task ClearRestSearch()
    {
        restSearchTerm = "";
        await InvokeAsync(StateHasChanged);
    }
    
    /// <summary>
    /// Seleziona una proprietà REST per il mapping
    /// </summary>
    protected void SelectRestProperty(string propertyName)
    {
        selectedRestProperty = propertyName;
    }
}