from django.contrib import admin
from django.utils.html import format_html
from quiz.models import Question
from .option_inline import OptionInline


@admin.register(Question)
class QuestionAdmin(admin.ModelAdmin):
    """Admin interface for Questions"""
    list_display = ['id', 'question_preview', 'exam', 'correct_answer', 'option_count', 'file_source', 'updated_at']
    list_filter = ['exam__course', 'exam', 'created_at', 'updated_at']
    search_fields = ['text', 'file_path', 'correct_answer']
    readonly_fields = ['file_path', 'file_mtime', 'created_at', 'updated_at', 'formatted_mtime']
    fieldsets = [
        ('Question Content', {
            'fields': ['exam', 'text', 'correct_answer']
        }),
        ('File Tracking', {
            'fields': ['file_path', 'file_mtime', 'formatted_mtime'],
            'classes': ['collapse']
        }),
        ('Timestamps', {
            'fields': ['created_at', 'updated_at'],
            'classes': ['collapse']
        }),
    ]
    inlines = [OptionInline]

    def question_preview(self, obj):
        """Show question text preview"""
        return obj.text[:60] + '...' if len(obj.text) > 60 else obj.text
    question_preview.short_description = 'Question'

    def option_count(self, obj):
        """Show number of options"""
        return obj.options.count()
    option_count.short_description = '# Options'

    def file_source(self, obj):
        """Show file path with folder highlight"""
        if obj.file_path:
            parts = obj.file_path.split('/')
            if len(parts) > 1:
                folder = parts[-2]
                filename = parts[-1]
                return format_html('<span style="color: #666;">{}/</span><strong>{}</strong>', folder, filename)
        return obj.file_path or '-'
    file_source.short_description = 'Source File'

    def formatted_mtime(self, obj):
        """Show formatted modification time"""
        if obj.file_mtime:
            from datetime import datetime
            dt = datetime.fromtimestamp(obj.file_mtime)
            return dt.strftime('%Y-%m-%d %H:%M:%S')
        return '-'
    formatted_mtime.short_description = 'File Modified'