using Microsoft.AspNetCore.Components;
using CredentialManager.Models;
using CredentialManager.Services;
using Microsoft.JSInterop;
using System.Text.Json;

namespace Data_Coupler.Pages;

public partial class ProfilesManagement : ComponentBase
{
    [Inject] private IDataCouplerProfileService ProfileService { get; set; } = null!;
    [Inject] private IJSRuntime JSRuntime { get; set; } = null!;
    [Inject] private ILogger<ProfilesManagement> Logger { get; set; } = null!;

    // State delle liste
    private List<DataCouplerProfile> allProfiles = new();

    // State dei filtri
    private string searchTerm = "";
    private string selectedSourceType = "";
    private string selectedUsageFilter = "";
    private string sortOrder = "name";

    // State delle modali
    private bool showDetailsModal = false;
    private bool showDeleteModal = false;
    private DataCouplerProfile? selectedProfile = null;
    private DataCouplerProfile? profileToDelete = null;

    // State operazioni
    private bool isLoading = true;
    private bool isDeleting = false;

    // Toast notifications
    private string toastMessage = "";
    private string toastType = "info";

    // Statistiche
    private int totalProfiles => allProfiles.Count;
    private int activeProfiles => allProfiles.Count(p => p.LastUsedAt.HasValue && p.LastUsedAt.Value > DateTime.Now.AddDays(-30));
    private int profilesThisWeek => allProfiles.Count(p => p.CreatedAt > DateTime.Now.AddDays(-7));
    private int unusedProfiles => allProfiles.Count(p => !p.LastUsedAt.HasValue);

    protected override async Task OnInitializedAsync()
    {
        await LoadProfiles();
    }

    private async Task LoadProfiles()
    {
        try
        {
            isLoading = true;
            var profiles = await ProfileService.GetAllProfilesAsync();
            allProfiles = profiles.ToList();
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Errore nel caricamento dei profili");
            ShowToast("Errore nel caricamento dei profili: " + ex.Message, "error");
        }
        finally
        {
            isLoading = false;
            StateHasChanged();
        }
    }

    private async Task RefreshProfiles()
    {
        await LoadProfiles();
    }

    // Filtri e ricerca
    private IEnumerable<DataCouplerProfile> GetFilteredProfiles()
    {
        var filtered = allProfiles.AsEnumerable();

        // Filtro per testo
        if (!string.IsNullOrEmpty(searchTerm))
        {
            filtered = filtered.Where(p => 
                p.Name.Contains(searchTerm, StringComparison.OrdinalIgnoreCase) ||
                (p.Description?.Contains(searchTerm, StringComparison.OrdinalIgnoreCase) ?? false));
        }

        // Filtro per tipo sorgente
        if (!string.IsNullOrEmpty(selectedSourceType))
        {
            filtered = filtered.Where(p => p.SourceType.Equals(selectedSourceType, StringComparison.OrdinalIgnoreCase));
        }

        // Filtro per utilizzo
        if (!string.IsNullOrEmpty(selectedUsageFilter))
        {
            filtered = selectedUsageFilter switch
            {
                "used" => filtered.Where(p => p.LastUsedAt.HasValue),
                "unused" => filtered.Where(p => !p.LastUsedAt.HasValue),
                "recent" => filtered.Where(p => p.LastUsedAt.HasValue && p.LastUsedAt.Value > DateTime.Now.AddDays(-7)),
                _ => filtered
            };
        }

        // Ordinamento
        filtered = sortOrder switch
        {
            "created" => filtered.OrderByDescending(p => p.CreatedAt),
            "lastused" => filtered.OrderByDescending(p => p.LastUsedAt ?? DateTime.MinValue),
            _ => filtered.OrderBy(p => p.Name)
        };

        return filtered;
    }

    private void FilterProfiles()
    {
        StateHasChanged();
    }

    private void ClearSearch()
    {
        searchTerm = "";
        FilterProfiles();
    }

    // Operazioni sui profili
    private void ShowDetails(DataCouplerProfile profile)
    {
        selectedProfile = profile;
        showDetailsModal = true;
        StateHasChanged();
    }

    private void CloseDetailsModal()
    {
        showDetailsModal = false;
        selectedProfile = null;
        StateHasChanged();
    }

    private void ConfirmDelete(DataCouplerProfile profile)
    {
        profileToDelete = profile;
        showDeleteModal = true;
        StateHasChanged();
    }

    private void CancelDelete()
    {
        showDeleteModal = false;
        profileToDelete = null;
        StateHasChanged();
    }

    private async Task DeleteProfile()
    {
        if (profileToDelete == null) return;

        try
        {
            isDeleting = true;
            StateHasChanged();

            await ProfileService.DeleteProfileAsync(profileToDelete.Id);
            allProfiles.Remove(profileToDelete);
            
            ShowToast("Profilo eliminato con successo", "success");
            CancelDelete();
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Errore nell'eliminazione del profilo {ProfileId}", profileToDelete.Id);
            ShowToast("Errore nell'eliminazione: " + ex.Message, "error");
        }
        finally
        {
            isDeleting = false;
            StateHasChanged();
        }
    }

    private async Task ExportProfiles()
    {
        try
        {
            var profilesToExport = GetFilteredProfiles().ToList();
            var json = JsonSerializer.Serialize(profilesToExport, new JsonSerializerOptions { WriteIndented = true });
            var fileName = $"profiles_export_{DateTime.Now:yyyyMMdd_HHmmss}.json";
            
            var bytes = System.Text.Encoding.UTF8.GetBytes(json);
            var stream = new MemoryStream(bytes);
            
            using var streamRef = new DotNetStreamReference(stream);
            await JSRuntime.InvokeVoidAsync("downloadFileFromStream", fileName, streamRef);
            
            ShowToast("Esportazione completata", "success");
        }
        catch (Exception ex)
        {
            Logger.LogError(ex, "Errore nell'esportazione dei profili");
            ShowToast("Errore nell'esportazione: " + ex.Message, "error");
        }
    }

    // Helper methods per la UI
    private string GetSourceTypeBadgeClass(string sourceType)
    {
        return sourceType?.ToLower() switch
        {
            "database" => "primary",
            "file" => "success",
            "rest" => "info",
            _ => "secondary"
        };
    }

    private string GetSourceTypeDisplayName(string sourceType)
    {
        return sourceType?.ToLower() switch
        {
            "database" => "Database",
            "file" => "File",
            "rest" => "REST API",
            _ => "Sconosciuto"
        };
    }

    private int GetMappingCount(DataCouplerProfile profile)
    {
        if (string.IsNullOrEmpty(profile.FieldMappingJson))
            return 0;

        try
        {
            var mappings = JsonSerializer.Deserialize<List<FieldMappingDto>>(profile.FieldMappingJson);
            return mappings?.Count ?? 0;
        }
        catch
        {
            return 0;
        }
    }

    private List<FieldMappingDto> GetProfileMappings(DataCouplerProfile profile)
    {
        if (string.IsNullOrEmpty(profile.FieldMappingJson))
            return new List<FieldMappingDto>();

        try
        {
            return JsonSerializer.Deserialize<List<FieldMappingDto>>(profile.FieldMappingJson) ?? new List<FieldMappingDto>();
        }
        catch
        {
            return new List<FieldMappingDto>();
        }
    }

    // Toast notifications
    private void ShowToast(string message, string type = "info")
    {
        toastMessage = message;
        toastType = type;
        StateHasChanged();
        
        // Auto-hide dopo 5 secondi
        _ = Task.Delay(5000).ContinueWith(_ => ClearToast());
    }

    private void ClearToast()
    {
        toastMessage = "";
        toastType = "info";
        InvokeAsync(StateHasChanged);
    }
}