using System.Text.Json;
using Omika.App.Local.Abstractions;
using Omika.App.Local.Infrastructure;
using Omika.App.Local.Models;
using Omika.App.Local.Services;
using Omika.App.Navigation;
using Omika.App.Services;
using Omika.App.ViewModels;
using Omika.Core.Constants;
using Omika.Core.Contracts.Clients;
using Omika.Core.Contracts.Common;
using Omika.Core.Contracts.Interventions;
using Omika.Core.Contracts.Sites;

namespace Omika.Tests.Mobile.Local;

/// <summary>
/// Tests du ViewModel de la fiche Site / lieu : chargement, état introuvable,
/// coordonnées, relations (client, contacts, interventions) et navigation vers
/// les entités liées. Aucun appel API.
/// </summary>
public class SiteDetailViewModelTests : LocalTestBase
{
    private readonly SiteDetailViewModel _viewModel;
    private readonly NavigationService _navigation;

    public SiteDetailViewModelTests()
    {
        var service = new SiteLocalService(SiteRepository, ClientRepository, PersonneRepository, RendezVousRepository, InterventionRepository, ContextInterventionCacheRepository, SiteStateRepository, ApiClient);
        _navigation = new NavigationService();
        var permissions = new PermissionService();
        permissions.SetRights(MobilePermissionKeys.All.ToDictionary(k => k, _ => true));
        _viewModel = new SiteDetailViewModel(service, _navigation, permissions, new FakeMapLauncher());
    }

    private sealed class FakeMapLauncher : IMapLauncher
    {
        public Task<bool> OpenItineraireAsync(string address) => Task.FromResult(true);
    }

    private static LocalSite CreateSite(
        Guid id,
        string nom,
        string? code = null,
        string? ville = null,
        string? type = null,
        Guid? clientId = null,
        IReadOnlyList<string>? contactIds = null)
    {
        var dto = new SiteDetailsDto
        {
            Id = id.ToString(),
            Nom = nom,
            Code = code,
            Type = type is null ? null : new ReferenceValueDto { Label = type },
            ClientId = clientId?.ToString(),
            Adresse = ville is null
                ? null
                : new AddressDto { City = ville, OneLine = ville },
            ContactIds = contactIds ?? []
        };
        return new LocalSite
        {
            Id = id,
            ClientId = clientId,
            PayloadJson = JsonSerializer.Serialize(dto),
            UpdatedAtUtc = DateTimeOffset.UtcNow
        };
    }

    private static LocalClient CreateClient(Guid id, string nom, string? code = null)
    {
        var dto = new ClientDetailsDto
        {
            Id = id.ToString(),
            Nom = nom,
            Code = code
        };
        return new LocalClient
        {
            Id = id,
            PayloadJson = JsonSerializer.Serialize(dto),
            UpdatedAtUtc = DateTimeOffset.UtcNow
        };
    }

    private static LocalPersonne CreatePersonne(Guid id, string nomAffiche)
    {
        var dto = new ContactDto
        {
            Id = id.ToString(),
            NomAffiche = nomAffiche
        };
        return new LocalPersonne
        {
            Id = id,
            PayloadJson = JsonSerializer.Serialize(dto),
            UpdatedAtUtc = DateTimeOffset.UtcNow
        };
    }

    private static LocalIntervention CreateIntervention(Guid id, Guid siteId, string reference, string titre)
    {
        var dto = new InterventionDetailsDto
        {
            Id = id.ToString(),
            Reference = reference,
            Titre = titre,
            SiteId = siteId.ToString(),
            Etat = new ReferenceValueDto { Label = "Planifiée" }
        };
        return new LocalIntervention
        {
            Id = id,
            SiteId = siteId,
            PayloadJson = JsonSerializer.Serialize(dto),
            UpdatedAtUtc = DateTimeOffset.UtcNow
        };
    }

    private async Task CacheSiteInterventionsAsync(Guid siteId, params LocalIntervention[] interventions)
    {
        var details = interventions
            .Select(i => JsonSerializer.Deserialize<InterventionDetailsDto>(i.PayloadJson)!)
            .ToList();
        await ContextInterventionCacheRepository.ReplaceAsync(InterventionContextTypes.Site, siteId, details);
    }

    [Fact]
    public async Task Load_ChargementPuisDetail()
    {
        // Arrange
        Guid siteId = Guid.NewGuid();
        await SiteRepository.UpsertAsync(CreateSite(siteId, "Site Alpha"));

        // Act
        await _viewModel.LoadCommand.ExecuteAsync(siteId);

        // Assert : après chargement, détail affiché et chargement terminé.
        Assert.False(_viewModel.IsLoading);
        Assert.NotNull(_viewModel.Site);
        Assert.Equal("Site Alpha", _viewModel.Site.Nom);
    }

    [Fact]
    public async Task Load_SiteIntrouvable_MessageErreur()
    {
        // Act
        await _viewModel.LoadCommand.ExecuteAsync(Guid.NewGuid());

        // Assert
        Assert.False(_viewModel.IsLoading);
        Assert.NotNull(_viewModel.ErrorMessage);
        Assert.Null(_viewModel.Site);
    }

    [Fact]
    public async Task Load_CoordonneesAffichees()
    {
        // Arrange
        Guid siteId = Guid.NewGuid();
        await SiteRepository.UpsertAsync(CreateSite(siteId, "Site Alpha", "S001", "Paris", "Entrepôt"));

        // Act
        await _viewModel.LoadCommand.ExecuteAsync(siteId);

        // Assert
        Assert.NotNull(_viewModel.Site);
        Assert.Equal("S001", _viewModel.Site.Code);
        Assert.Equal("Entrepôt", _viewModel.Site.Type);
        Assert.True(_viewModel.Site.HasAdresse);
        Assert.Equal("Paris", _viewModel.Site.Adresse!.City);
    }

    [Fact]
    public async Task Load_ContactsLiees()
    {
        // Arrange
        Guid siteId = Guid.NewGuid();
        Guid contactId = Guid.NewGuid();
        await SiteRepository.UpsertAsync(CreateSite(siteId, "Site A", contactIds: [contactId.ToString()]));
        await PersonneRepository.UpsertAsync(CreatePersonne(contactId, "Contact A"));

        // Act
        await _viewModel.LoadCommand.ExecuteAsync(siteId);

        // Assert
        Assert.True(_viewModel.HasContacts);
        var contact = Assert.Single(_viewModel.Site!.Contacts);
        Assert.Equal(contactId, contact.ContactGuid);
    }

    [Fact]
    public async Task Load_InterventionsLiees()
    {
        // Arrange
        Guid siteId = Guid.NewGuid();
        Guid interventionId = Guid.NewGuid();
        await SiteRepository.UpsertAsync(CreateSite(siteId, "Site A"));
        await CacheSiteInterventionsAsync(siteId, CreateIntervention(interventionId, siteId, "INT-001", "Intervention A"));

        // Act
        await _viewModel.LoadCommand.ExecuteAsync(siteId);

        // Assert
        Assert.True(_viewModel.HasInterventions);
        var intervention = Assert.Single(_viewModel.Site!.Interventions);
        Assert.Equal(interventionId, intervention.InterventionGuid);
    }

    [Fact]
    public async Task Load_RelationsVides_PasDErreur()
    {
        // Arrange : site sans relations.
        Guid siteId = Guid.NewGuid();
        await SiteRepository.UpsertAsync(CreateSite(siteId, "Site A"));

        // Act
        await _viewModel.LoadCommand.ExecuteAsync(siteId);

        // Assert : collections vides, pas d'erreur.
        Assert.NotNull(_viewModel.Site);
        Assert.False(_viewModel.HasClients);
        Assert.False(_viewModel.HasContacts);
        Assert.False(_viewModel.HasInterventions);
        Assert.Null(_viewModel.ErrorMessage);
    }

    [Fact]
    public async Task OpenClient_NavigueVersClientDetail()
    {
        // Arrange
        Guid clientId = Guid.NewGuid();
        var client = new SiteClient { ClientGuid = clientId, Code = "C001", Nom = "Client A" };

        // Act
        _viewModel.OpenClientCommand.Execute(client);

        // Assert : navigation vers le détail du client avec le GUID public.
        Assert.Equal(AppPage.ClientDetail, _navigation.CurrentPage);
        Assert.Equal(clientId, _navigation.CurrentParameter);
    }

    [Fact]
    public async Task OpenClient_Null_NeNaviguePas()
    {
        // Act
        _viewModel.OpenClientCommand.Execute(null);

        // Assert
        Assert.Equal(AppPage.Home, _navigation.CurrentPage);
    }

    [Fact]
    public async Task OpenContact_NavigueVersContactDetail()
    {
        // Arrange
        Guid siteId = Guid.NewGuid();
        Guid contactId = Guid.NewGuid();
        await SiteRepository.UpsertAsync(CreateSite(siteId, "Site A", contactIds: [contactId.ToString()]));
        await PersonneRepository.UpsertAsync(CreatePersonne(contactId, "Contact A"));
        await _viewModel.LoadCommand.ExecuteAsync(siteId);

        // Act
        _viewModel.OpenContactCommand.Execute(_viewModel.Site!.Contacts[0]);

        // Assert : navigation vers le détail du contact avec le GUID public et le retour vers la fiche Site.
        Assert.Equal(AppPage.ContactDetail, _navigation.CurrentPage);
        var nav = Assert.IsType<DetailNavigation>(_navigation.CurrentParameter);
        Assert.Equal(contactId, nav.Id);
        Assert.Equal(AppPage.SiteDetail, nav.ReturnContext.Page);
        Assert.Equal(siteId, nav.ReturnContext.Parameter);

    }

    [Fact]
    public async Task OpenIntervention_NavigueVersInterventionDetail()
    {
        // Arrange
        Guid siteId = Guid.NewGuid();
        Guid interventionId = Guid.NewGuid();
        await SiteRepository.UpsertAsync(CreateSite(siteId, "Site A"));
        await CacheSiteInterventionsAsync(siteId, CreateIntervention(interventionId, siteId, "INT-001", "Intervention A"));
        await _viewModel.LoadCommand.ExecuteAsync(siteId);

        // Act
        _viewModel.OpenInterventionCommand.Execute(_viewModel.Site!.Interventions[0]);

        // Assert : navigation vers le détail de l'intervention avec le GUID public et le retour vers la fiche Site.
        Assert.Equal(AppPage.InterventionDetail, _navigation.CurrentPage);
        var nav = Assert.IsType<DetailNavigation>(_navigation.CurrentParameter);
        Assert.Equal(interventionId, nav.Id);
        Assert.Equal(AppPage.SiteDetail, nav.ReturnContext.Page);
        Assert.Equal(siteId, nav.ReturnContext.Parameter);
    }

    [Fact]
    public async Task OpenContact_Null_NeNaviguePas()

    {
        // Act
        _viewModel.OpenContactCommand.Execute(null);

        // Assert
        Assert.Equal(AppPage.Home, _navigation.CurrentPage);
    }

    [Fact]
    public async Task OpenIntervention_Null_NeNaviguePas()
    {
        // Act
        _viewModel.OpenInterventionCommand.Execute(null);

        // Assert
        Assert.Equal(AppPage.Home, _navigation.CurrentPage);
    }

    [Fact]
    public async Task Back_RetourneALaListe()
    {
        // Act
        _viewModel.BackCommand.Execute(null);

        // Assert
        Assert.Equal(AppPage.Sites, _navigation.CurrentPage);
    }

    [Fact]
    public async Task Load_IdentitePublique_Conservee()
    {
        // Arrange
        Guid siteId = Guid.NewGuid();
        await SiteRepository.UpsertAsync(CreateSite(siteId, "Site Alpha"));

        // Act
        await _viewModel.LoadCommand.ExecuteAsync(siteId);

        // Assert
        Assert.NotNull(_viewModel.Site);
        Assert.Equal(siteId, _viewModel.Site.SiteGuid);
    }
}