from django.contrib import admin
from django.utils.html import format_html
from file.models import File


@admin.register(File)
class FileAdmin(admin.ModelAdmin):
    """Admin interface for Files"""
    list_display = ['id', 'name_with_icon', 'path_display', 'mime_type_display', 'parent_display', 'children_count', 'created_at']
    list_filter = ['mime_type', 'created_at', 'user']
    search_fields = ['name', 'path', 'mime_type', 'text']
    readonly_fields = ['created_at', 'updated_at', 'text_preview']
    fieldsets = [
        ('File Info', {
            'fields': ['name', 'path', 'mime_type', 'parent', 'user']
        }),
        ('Content', {
            'fields': ['text_preview', 'external_url'],
            'classes': ['collapse']
        }),
        ('Metadata', {
            'fields': ['metadata'],
            'classes': ['collapse']
        }),
        ('Timestamps', {
            'fields': ['created_at', 'updated_at'],
            'classes': ['collapse']
        }),
    ]

    def name_with_icon(self, obj):
        """Show name with icon based on mime type"""
        icon = '📁' if obj.mime_type == 'application/x-folder' else '📄'
        if obj.mime_type.startswith('text/markdown'):
            icon = '📝'
        elif obj.mime_type.startswith('application/pdf'):
            icon = '📕'
        elif obj.mime_type.startswith('video/'):
            icon = '🎥'
        return format_html('{} <strong>{}</strong>', icon, obj.name)
    name_with_icon.short_description = 'Name'

    def path_display(self, obj):
        """Show path with folder/file distinction"""
        if obj.path:
            parts = obj.path.split('/')
            if len(parts) > 1:
                folder_path = '/'.join(parts[:-1])
                return format_html('<span style="color: #666;">{}/</span>{}', folder_path, parts[-1])
        return obj.path or '-'
    path_display.short_description = 'Path'

    def mime_type_display(self, obj):
        """Show mime type with color coding"""
        color = '#999'
        if obj.mime_type == 'application/x-folder':
            color = '#3b82f6'
        elif obj.mime_type.startswith('text/'):
            color = '#10b981'
        elif obj.mime_type.startswith('application/pdf'):
            color = '#ef4444'
        return format_html('<span style="color: {};">{}</span>', color, obj.mime_type)
    mime_type_display.short_description = 'MIME Type'

    def parent_display(self, obj):
        """Show parent file"""
        if obj.parent:
            icon = '📁' if obj.parent.mime_type == 'application/x-folder' else '📄'
            return format_html('{} {}', icon, obj.parent.name)
        return '-'
    parent_display.short_description = 'Parent'

    def children_count(self, obj):
        """Show number of child files"""
        count = obj.children.count()
        if count > 0:
            return format_html('<span style="color: #3b82f6; font-weight: bold;">{}</span>', count)
        return '-'
    children_count.short_description = '# Children'

    def text_preview(self, obj):
        """Show text content preview"""
        if obj.text:
            preview = obj.text[:200] + '...' if len(obj.text) > 200 else obj.text
            return format_html('<pre style="white-space: pre-wrap;">{}</pre>', preview)
        return '-'
    text_preview.short_description = 'Text Content'