Admin Interface

class FileAdmin(admin.ModelAdmin):
    """
    Admin interface for File model with specialized file management features.
    
    Features:
    - File preview and thumbnail display
    - Drag-and-drop upload support
    - Bulk operations (move, delete, change permissions)
    - Advanced search and filtering
    - Permission checking integration
    """

class FolderAdmin(admin.ModelAdmin):
    """
    Admin interface for Folder model with hierarchical navigation.
    
    Features:
    - Tree-based folder navigation
    - Drag-and-drop folder organization
    - Permission management interface
    - Bulk folder operations
    """

class ImageAdmin(FileAdmin):
    """
    Admin interface for Image model extending FileAdmin.
    
    Additional Features:
    - Image preview with dimensions
    - EXIF data display
    - Thumbnail generation controls
    - Subject location editing
    """

class ClipboardAdmin(admin.ModelAdmin):
    """Admin interface for Clipboard model."""

class PermissionAdmin(admin.ModelAdmin):
    """Admin interface for FolderPermission model."""

class ThumbnailOptionAdmin(admin.ModelAdmin):
    """Admin interface for ThumbnailOption model."""

class AdminFileWidget(ForeignKeyRawIdWidget):
    """
    Admin widget for file selection with popup browser.
    
    Features:
    - Popup file browser with folder navigation
    - File preview and metadata display
    - Search and filter capabilities
    - Drag-and-drop file upload in popup
    """
    
    def render(self, name, value, attrs=None, renderer=None):
        """
        Render widget HTML with file browser popup.
        
        Args:
            name (str): Field name
            value: Current field value (File ID)
            attrs (dict): HTML attributes
            renderer: Template renderer
            
        Returns:
            str: Rendered HTML with popup trigger and preview
        """
        
    def label_for_value(self, value):
        """
        Get display label for selected file.
        
        Args:
            value: File ID
            
        Returns:
            str: HTML label with file name and preview
        """
        
    def obj_for_value(self, value):
        """
        Get File object for given ID.
        
        Args:
            value: File ID
            
        Returns:
            File or None: File object if exists
        """
        
    class Media:
        """CSS and JavaScript requirements for the widget."""
        css = {
            'all': (
                'filer/css/admin_filer.css',
                # Icon CSS library
            )
        }
        js = (
            'admin/js/vendor/jquery/jquery.min.js',
            'admin/js/jquery.init.js', 
            'filer/js/libs/dropzone.min.js',
            'filer/js/addons/dropzone.init.js',
            'filer/js/addons/popup_handling.js',
            'filer/js/addons/widget.js',
        )

class AdminImageWidget(AdminFileWidget):
    """
    Admin widget for image selection extending AdminFileWidget.
    
    Additional Features:
    - Image thumbnail preview
    - Image-specific metadata display
    - Dimension information
    """

class AdminFolderWidget(ForeignKeyRawIdWidget):
    """
    Admin widget for folder selection with folder browser.
    
    Features:
    - Hierarchical folder tree popup
    - Folder creation capabilities
    - Permission-aware folder filtering
    - Breadcrumb navigation
    """
    
    def render(self, name, value, attrs=None, renderer=None):
        """
        Render widget HTML with folder browser popup.
        
        Args:
            name (str): Field name
            value: Current field value (Folder ID)
            attrs (dict): HTML attributes
            renderer: Template renderer
            
        Returns:
            str: Rendered HTML with folder browser popup
        """
        
    class Media:
        """CSS and JavaScript requirements."""
        css = {"all": ('filer/css/admin_filer.css',)}
        js = ('filer/js/addons/popup_handling.js',)

class AdminFileFormField(forms.ModelChoiceField):
    """
    Form field for file selection in admin interface.
    
    Integrates with AdminFileWidget to provide:
    - File browser popup
    - Search and filtering
    - Permission-aware file selection
    """
    
    def __init__(self, rel, queryset, to_field_name, *args, **kwargs):
        """
        Initialize form field with admin widget.
        
        Args:
            rel: Field relation object
            queryset: Available files QuerySet
            to_field_name: Target field name
        """

class AdminImageFormField(AdminFileFormField):
    """Form field for image selection extending AdminFileFormField."""

class AdminFolderFormField(forms.ModelChoiceField):
    """
    Form field for folder selection in admin interface.
    
    Integrates with AdminFolderWidget to provide:
    - Folder tree popup
    - Permission-aware folder selection
    - Folder creation capabilities
    """

# Admin URL patterns (internal)
urlpatterns = [
    path('admin:filer-directory_listing-last', DirectoryListingView.as_view()),
    path('admin:filer-directory_listing-unfiled_images', UnfiledImagesView.as_view()), 
    path('admin:filer-directory_listing-images_with_missing_data', ImagesWithMissingDataView.as_view()),
]

class DirectoryListingView:
    """
    Main file browser view providing:
    - Folder navigation with breadcrumbs
    - File and folder listing with previews
    - Drag-and-drop upload
    - Bulk operations (move, delete, permissions)
    - Search and filtering
    - Permission checking
    """

class FilePickerView:
    """
    File selection popup view for widgets providing:
    - Modal file browser
    - File selection and confirmation
    - Upload capabilities within popup
    """

from django.contrib import admin
from filer.fields import FilerFileField, FilerImageField
from .models import Article

class ArticleAdmin(admin.ModelAdmin):
    list_display = ['title', 'created_at', 'featured_image_preview']
    list_filter = ['created_at'] 
    search_fields = ['title', 'content']
    
    # Organize fields in fieldsets
    fieldsets = (
        ('Content', {
            'fields': ('title', 'content', 'author')
        }),
        ('Media', {
            'fields': ('featured_image', 'attachment', 'gallery_folder'),
            'classes': ('collapse',),  # Collapsible section
        }),
        ('Metadata', {
            'fields': ('created_at', 'updated_at'),
            'classes': ('collapse',),
        }),
    )
    
    readonly_fields = ['created_at', 'updated_at']
    
    def featured_image_preview(self, obj):
        """Show image preview in list view."""
        if obj.featured_image:
            return f'<img src="{obj.featured_image.icons["32"]}" alt="Preview" />'
        return "No image"
    featured_image_preview.allow_tags = True
    featured_image_preview.short_description = "Preview"

admin.site.register(Article, ArticleAdmin)

from django import forms
from filer.fields import FilerImageField
from filer.models import Image

class CustomArticleForm(forms.ModelForm):
    # Override widget for more control
    featured_image = forms.ModelChoiceField(
        queryset=Image.objects.filter(is_public=True),
        widget=AdminImageWidget(rel=FilerImageField().remote_field),
        required=False
    )
    
    class Meta:
        model = Article
        fields = '__all__'
    
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        
        # Customize widget attributes
        self.fields['featured_image'].widget.attrs.update({
            'class': 'custom-image-widget',
            'data-placeholder': 'Select an image...'
        })

class ArticleAdmin(admin.ModelAdmin):
    form = CustomArticleForm

from django.contrib import admin
from filer.models import File

class CustomFileAdmin(admin.ModelAdmin):
    list_display = ['name', 'folder', 'owner', 'is_public', 'file_size']
    list_filter = ['is_public', 'folder', 'mime_type']
    search_fields = ['name', 'original_filename']
    
    # Enable bulk operations
    actions = ['make_public', 'make_private', 'move_to_folder']
    
    def make_public(self, request, queryset):
        """Bulk action to make files public."""
        updated = queryset.update(is_public=True)
        self.message_user(request, f'{updated} files made public.')
    make_public.short_description = "Make selected files public"
    
    def make_private(self, request, queryset):
        """Bulk action to make files private.""" 
        updated = queryset.update(is_public=False)
        self.message_user(request, f'{updated} files made private.')
    make_private.short_description = "Make selected files private"
    
    def move_to_folder(self, request, queryset):
        """Bulk action to move files to a folder."""
        # Custom logic for folder selection and moving
        pass
    move_to_folder.short_description = "Move selected files to folder"

# Unregister default and register custom
admin.site.unregister(File)
admin.site.register(File, CustomFileAdmin)

from django.contrib import admin
from django.urls import path
from django.http import JsonResponse
from filer.models import File, Folder

class CustomFilerAdmin(admin.ModelAdmin):
    def get_urls(self):
        """Add custom upload endpoint."""
        urls = super().get_urls()
        custom_urls = [
            path('bulk-upload/', self.admin_site.admin_view(self.bulk_upload_view), 
                 name='filer_file_bulk_upload'),
        ]
        return custom_urls + urls
    
    def bulk_upload_view(self, request):
        """Custom bulk upload handler."""
        if request.method == 'POST':
            files = request.FILES.getlist('files')
            folder_id = request.POST.get('folder_id')
            
            folder = None
            if folder_id:
                folder = Folder.objects.get(pk=folder_id)
            
            uploaded_files = []
            for file in files:
                file_obj = File.objects.create(
                    file=file,
                    name=file.name,
                    folder=folder,
                    owner=request.user
                )
                uploaded_files.append({
                    'id': file_obj.id,
                    'name': file_obj.name,
                    'url': file_obj.url
                })
            
            return JsonResponse({
                'success': True,
                'files': uploaded_files
            })
        
        return JsonResponse({'success': False})

from django.contrib import admin
from filer.models import File, Folder

class PermissionAwareFileAdmin(admin.ModelAdmin):
    def get_queryset(self, request):
        """Filter files based on user permissions."""
        qs = super().get_queryset(request)
        
        if request.user.is_superuser:
            return qs
        
        # Filter files user has read permission for
        allowed_files = []
        for file in qs:
            if file.has_read_permission(request.user):
                allowed_files.append(file.pk)
        
        return qs.filter(pk__in=allowed_files)
    
    def has_change_permission(self, request, obj=None):
        """Check edit permission for specific file."""
        if obj is None:
            return True  # Allow viewing list
        
        return obj.has_edit_permission(request.user)

class PermissionAwareFolderAdmin(admin.ModelAdmin):
    def get_queryset(self, request):
        """Filter folders based on user permissions."""
        qs = super().get_queryset(request)
        
        if request.user.is_superuser:
            return qs
        
        # Filter folders user has read permission for
        allowed_folders = []
        for folder in qs:
            if folder.has_read_permission(request.user):
                allowed_folders.append(folder.pk)
        
        return qs.filter(pk__in=allowed_folders)

from django.contrib import admin
from django.utils.html import format_html
from filer.models import File, Image

class RichFileAdmin(admin.ModelAdmin):
    list_display = [
        'file_preview', 'name', 'folder', 'size_formatted', 
        'mime_type', 'is_public', 'uploaded_at'
    ]
    
    def file_preview(self, obj):
        """Show file preview or icon."""
        if hasattr(obj, 'icons') and obj.icons:
            # For images, show thumbnail
            return format_html(
                '<img src="{}" alt="{}" style="max-width: 48px; max-height: 48px;" />',
                obj.icons.get('48', obj.icons.get('32', '')),
                obj.name
            )
        else:
            # For other files, show type icon
            return format_html(
                '<span class="filer-file-icon filer-file-icon-{}" title="{}"></span>',
                obj.extension or 'unknown',
                obj.mime_type
            )
    file_preview.short_description = "Preview"
    
    def size_formatted(self, obj):
        """Show formatted file size."""
        if obj.size:
            return f"{obj.size:,} bytes"
        return "Unknown"
    size_formatted.short_description = "Size"
    
    # Custom filter for file types
    class FileTypeFilter(admin.SimpleListFilter):
        title = 'File Type'
        parameter_name = 'file_type'
        
        def lookups(self, request, model_admin):
            return (
                ('image', 'Images'),
                ('document', 'Documents'),
                ('video', 'Videos'),
                ('audio', 'Audio'),
            )
        
        def queryset(self, request, queryset):
            if self.value() == 'image':
                return queryset.filter(mime_type__startswith='image/')
            elif self.value() == 'document':
                return queryset.filter(mime_type__in=[
                    'application/pdf', 'application/msword',
                    'application/vnd.openxmlformats-officedocument.wordprocessingml.document'
                ])
            # Add more filter logic as needed
            return queryset
    
    list_filter = [FileTypeFilter, 'is_public', 'folder']

admin.site.register(File, RichFileAdmin)