@page "/superadmin"
@rendermode InteractiveWebAssembly
@attribute [Authorize(Policy = "AdminOnly")]
@using System.Net.Http.Json
@inject HttpClient Http
@inject ISnackbar Snackbar
@inject IDialogService DialogService

<PageTitle>Firmenverwaltung – Timetracker SaaS</PageTitle>

@if (_loading)
{
    <MudStack AlignItems="AlignItems.Center" Class="mt-16" Spacing="3">
        <MudProgressCircular Color="Color.Primary" Indeterminate="true" Size="Size.Large" />
        <MudText Color="Color.Secondary">Lade Firmen und Mandanten…</MudText>
    </MudStack>
}
else
{
    <MudStack Spacing="4">

        @* ── Header Card ── *@
        <MudPaper Elevation="4" Class="pa-6 rounded-xl"
                  Style="background: linear-gradient(135deg, var(--mud-palette-primary-darken) 0%, var(--mud-palette-primary) 100%); color: var(--mud-palette-primary-text);">
            <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="4">
                <MudIcon Icon="@Icons.Material.Filled.Business" Style="color: var(--mud-palette-secondary); font-size:3rem" />
                <MudStack Spacing="0">
                    <MudText Typo="Typo.h5" Style="color: var(--mud-palette-primary-text); font-weight:800">SuperAdmin Dashboard</MudText>
                    <MudText Typo="Typo.body2" Style="color: var(--mud-palette-primary-text); opacity: 0.72">
                        @_tenants.Count registrierte Firmen im System
                    </MudText>
                </MudStack>
            </MudStack>
        </MudPaper>

        @* ── Tenants Table ── *@
        <MudCard Elevation="3" Class="rounded-xl overflow-hidden">
            <MudCardContent Class="pa-0">
                <MudTable Items="_tenants" Hover="true" Striped="true" Elevation="0" SortLabel="Sortieren">
                    <HeaderContent>
                        <MudTh Style="width: 50px;" />
                        <MudTh><MudTableSortLabel SortBy="new Func<TenantStats, object>(t => t.Id)">ID</MudTableSortLabel></MudTh>
                        <MudTh><MudTableSortLabel SortBy="new Func<TenantStats, object>(t => t.Name)">Name</MudTableSortLabel></MudTh>
                        <MudTh><MudTableSortLabel SortBy="new Func<TenantStats, object>(t => t.Subdomain)">Subdomain</MudTableSortLabel></MudTh>
                        <MudTh><MudTableSortLabel SortBy="new Func<TenantStats, object>(t => t.CreatedAt)">Erstellt am</MudTableSortLabel></MudTh>
                        <MudTh Style="text-align:center"><MudTableSortLabel SortBy="new Func<TenantStats, object>(t => t.UserCount)">Benutzer</MudTableSortLabel></MudTh>
                        <MudTh Style="text-align:center"><MudTableSortLabel SortBy="new Func<TenantStats, object>(t => t.WorkDaysCount)">Arbeitstage</MudTableSortLabel></MudTh>
                        <MudTh Style="text-align:center">Status</MudTh>
                        <MudTh Style="text-align:right">Aktionen</MudTh>
                    </HeaderContent>
                    <RowTemplate>
                        <MudTd>
                            <MudIconButton Icon="@(context.ShowDetails ? Icons.Material.Filled.ExpandLess : Icons.Material.Filled.ExpandMore)"
                                           Size="Size.Small"
                                           OnClick="@(() => context.ShowDetails = !context.ShowDetails)" />
                        </MudTd>
                        <MudTd DataLabel="ID">
                            <MudText Typo="Typo.body2" Color="Color.Secondary">@context.Id</MudText>
                        </MudTd>
                        <MudTd DataLabel="Name">
                            <MudText Typo="Typo.body1" Style="font-weight:600">@context.Name</MudText>
                        </MudTd>
                        <MudTd DataLabel="Subdomain">
                            <MudChip T="string" Color="Color.Primary" Variant="Variant.Outlined" Size="Size.Small">
                                @context.Subdomain
                            </MudChip>
                        </MudTd>
                        <MudTd DataLabel="Erstellt am">
                            <MudText Typo="Typo.body2">@context.CreatedAt.ToLocalTime().ToString("dd.MM.yyyy HH:mm")</MudText>
                        </MudTd>
                        <MudTd DataLabel="Benutzer" Style="text-align:center">
                            <MudBadge Content="@context.UserCount" Color="Color.Default" Overlap="false" Class="mx-2" />
                        </MudTd>
                        <MudTd DataLabel="Arbeitstage" Style="text-align:center">
                            <MudText Typo="Typo.body2">@context.WorkDaysCount</MudText>
                        </MudTd>
                        <MudTd DataLabel="Status" Style="text-align:center">
                            @if (context.IsApproved)
                            {
                                <MudChip T="string" Color="Color.Success" Size="Size.Small" Icon="@Icons.Material.Filled.Check">Aktiv</MudChip>
                            }
                            else
                            {
                                <MudChip T="string" Color="Color.Warning" Size="Size.Small" Icon="@Icons.Material.Filled.HourglassEmpty">Ausstehend</MudChip>
                            }
                        </MudTd>
                        <MudTd Style="text-align:right">
                            @if (!context.IsApproved)
                            {
                                <MudButton Variant="Variant.Filled" 
                                           Color="Color.Success" 
                                           Size="Size.Small" 
                                           StartIcon="@Icons.Material.Filled.CheckCircle" 
                                           OnClick="@(() => ApproveTenant(context))"
                                           Class="mr-1">
                                    Freigeben
                                </MudButton>
                            }
                            else
                            {
                                <MudButton Variant="Variant.Outlined" 
                                           Color="Color.Warning" 
                                           Size="Size.Small" 
                                           StartIcon="@Icons.Material.Filled.Block" 
                                           OnClick="@(() => ToggleActiveTenant(context))"
                                           Class="mr-1">
                                    Sperren
                                </MudButton>
                            }
                            <MudIconButton Icon="@Icons.Material.Filled.Delete" 
                                           Color="Color.Error" 
                                           Size="Size.Small" 
                                           OnClick="@(() => DeleteTenant(context))" />
                        </MudTd>
                    </RowTemplate>
                    <ChildRowContent>
                        @if (context.ShowDetails)
                        {
                            <MudTr>
                                <td colspan="9" style="background-color: var(--mud-palette-background-grey); padding: 16px;">
                                    <MudPaper Elevation="1" Class="pa-4 rounded-lg">
                                        <MudText Typo="Typo.subtitle2" Class="mb-3" Style="font-weight: 700;">
                                            Benutzer für Firma: @context.Name
                                        </MudText>
                                        @if (context.Users == null || context.Users.Count == 0)
                                        {
                                            <MudText Typo="Typo.body2" Color="Color.Secondary">Keine Benutzer in dieser Firma registriert.</MudText>
                                        }
                                        else
                                        {
                                            <MudGrid Spacing="2">
                                                @foreach (var user in context.Users)
                                                {
                                                    <MudItem xs="12" sm="6" md="4">
                                                        <MudPaper Outlined="true" Class="pa-3 rounded-lg d-flex align-center justify-space-between" Style="background: white;">
                                                            <MudStack Row="true" AlignItems="AlignItems.Center" Spacing="2">
                                                                <MudAvatar Color="user.IsTenantAdmin ? Color.Primary : Color.Default" Size="Size.Small">
                                                                    @user.Username.Substring(0, Math.Min(2, user.Username.Length)).ToUpper()
                                                                </MudAvatar>
                                                                <MudStack Spacing="0">
                                                                    <MudText Typo="Typo.body2" Style="font-weight: 600;">@user.Username</MudText>
                                                                    <MudText Typo="Typo.caption" Color="Color.Secondary">ID: @user.Id</MudText>
                                                                </MudStack>
                                                            </MudStack>
                                                            @if (user.IsTenantAdmin)
                                                            {
                                                                <MudChip T="string" Color="Color.Primary" Size="Size.Small" Variant="Variant.Text" Icon="@Icons.Material.Filled.AdminPanelSettings">Admin</MudChip>
                                                            }
                                                            else
                                                            {
                                                                <MudChip T="string" Color="Color.Default" Size="Size.Small" Variant="Variant.Text" Icon="@Icons.Material.Filled.Person">Mitarbeiter</MudChip>
                                                            }
                                                        </MudPaper>
                                                    </MudItem>
                                                }
                                            </MudGrid>
                                        }
                                    </MudPaper>
                                </td>
                            </MudTr>
                        }
                    </ChildRowContent>
                </MudTable>
            </MudCardContent>
        </MudCard>
    </MudStack>
}

@code {
    [PersistentState(AllowUpdates = true)]
    public List<TenantStats>? PersistentTenants { get; set; }

    private bool _loading = true;
    private List<TenantStats> _tenants = [];

    protected override async Task OnInitializedAsync()
    {
        if (PersistentTenants != null)
        {
            _tenants = PersistentTenants;
            _loading = false;
        }
        else
        {
            await LoadTenants();
        }
    }

    private async Task LoadTenants()
    {
        _loading = true;
        try
        {
            _tenants = await Http.GetFromJsonAsync<List<TenantStats>>("api/superadmin/tenants") ?? [];
            PersistentTenants = _tenants;
        }
        catch (Exception ex)
        {
            Snackbar.Add($"Fehler beim Laden der Firmen: {ex.Message}", Severity.Error);
        }
        finally
        {
            _loading = false;
        }
    }

    private async Task ApproveTenant(TenantStats tenant)
    {
        try
        {
            var response = await Http.PostAsync($"api/superadmin/tenants/{tenant.Id}/approve", null);
            if (response.IsSuccessStatusCode)
            {
                tenant.IsApproved = true;
                Snackbar.Add($"Firma '{tenant.Name}' wurde erfolgreich freigegeben.", Severity.Success);
            }
            else
            {
                Snackbar.Add("Fehler bei der Freigabe.", Severity.Error);
            }
        }
        catch (Exception ex)
        {
            Snackbar.Add($"Fehler: {ex.Message}", Severity.Error);
        }
    }

    private async Task ToggleActiveTenant(TenantStats tenant)
    {
        try
        {
            var response = await Http.PostAsync($"api/superadmin/tenants/{tenant.Id}/toggle-active", null);
            if (response.IsSuccessStatusCode)
            {
                tenant.IsApproved = !tenant.IsApproved;
                var stateMsg = tenant.IsApproved ? "aktiviert" : "gesperrt";
                Snackbar.Add($"Firma '{tenant.Name}' wurde {stateMsg}.", Severity.Info);
            }
            else
            {
                Snackbar.Add("Fehler beim Ändern des Status.", Severity.Error);
            }
        }
        catch (Exception ex)
        {
            Snackbar.Add($"Fehler: {ex.Message}", Severity.Error);
        }
    }

    private async Task DeleteTenant(TenantStats tenant)
    {
        bool? result = await DialogService.ShowMessageBoxAsync(
            "Firma unwiderruflich löschen?",
            $"Sind Sie sicher, dass Sie die Firma '{tenant.Name}' ({tenant.Subdomain}) inklusive ALLER zugehörigen Benutzer, Einstellungen und Zeiterfassungen unwiderruflich löschen möchten? Dieser Vorgang kann nicht rückgängig gemacht werden!",
            yesText: "Löschen", cancelText: "Abbrechen");

        if (result == true)
        {
            try
            {
                var response = await Http.DeleteAsync($"api/superadmin/tenants/{tenant.Id}");
                if (response.IsSuccessStatusCode)
                {
                    _tenants.Remove(tenant);
                    Snackbar.Add($"Firma '{tenant.Name}' wurde gelöscht.", Severity.Success);
                }
                else
                {
                    var err = await response.Content.ReadAsStringAsync();
                    Snackbar.Add($"Fehler beim Löschen: {err}", Severity.Error);
                }
            }
            catch (Exception ex)
            {
                Snackbar.Add($"Fehler: {ex.Message}", Severity.Error);
            }
        }
    }
}