from django.contrib import admin
from django.utils.html import format_html
from unfold.admin import ModelAdmin
from unfold.decorators import display
from .models import Review, ReviewHelpfulVote


@admin.register(Review)
class ReviewAdmin(ModelAdmin):
    list_display = [
        'id',
        'user_link',
        'entity_type',
        'entity_link',
        'rating_display',
        'title',
        'moderation_status_badge',
        'helpful_score',
        'created',
    ]
    list_filter = [
        'moderation_status',
        'rating',
        'created',
        'content_type',
    ]
    search_fields = [
        'title',
        'content',
        'user__username',
        'user__email',
    ]
    readonly_fields = [
        'user',
        'content_type',
        'object_id',
        'content_object',
        'helpful_votes',
        'total_votes',
        'helpful_percentage',
        'created',
        'modified',
    ]
    fieldsets = (
        ('Review Information', {
            'fields': (
                'user',
                'content_type',
                'object_id',
                'content_object',
                'title',
                'content',
                'rating',
            )
        }),
        ('Visit Details', {
            'fields': (
                'visit_date',
                'wait_time_minutes',
            )
        }),
        ('Voting Statistics', {
            'fields': (
                'helpful_votes',
                'total_votes',
                'helpful_percentage',
            )
        }),
        ('Moderation', {
            'fields': (
                'moderation_status',
                'moderation_notes',
                'moderated_by',
                'moderated_at',
            )
        }),
        ('Timestamps', {
            'fields': (
                'created',
                'modified',
            )
        }),
    )
    list_per_page = 50
    
    @display(description='User', ordering='user__username')
    def user_link(self, obj):
        from django.urls import reverse
        url = reverse('admin:users_user_change', args=[obj.user.pk])
        return format_html('<a href="{}">{}</a>', url, obj.user.username)
    
    @display(description='Entity Type', ordering='content_type')
    def entity_type(self, obj):
        return obj.content_type.model.title()
    
    @display(description='Entity')
    def entity_link(self, obj):
        if obj.content_object:
            from django.urls import reverse
            model_name = obj.content_type.model
            url = reverse(f'admin:entities_{model_name}_change', args=[obj.object_id])
            return format_html('<a href="{}">{}</a>', url, str(obj.content_object))
        return f"ID: {obj.object_id}"
    
    @display(description='Rating', ordering='rating')
    def rating_display(self, obj):
        stars = '⭐' * obj.rating
        return format_html('<span title="{}/5">{}</span>', obj.rating, stars)
    
    @display(description='Status', ordering='moderation_status')
    def moderation_status_badge(self, obj):
        colors = {
            'pending': '#FFA500',
            'approved': '#28A745',
            'rejected': '#DC3545',
        }
        color = colors.get(obj.moderation_status, '#6C757D')
        return format_html(
            '<span style="background-color: {}; color: white; padding: 3px 10px; '
            'border-radius: 3px; font-weight: bold;">{}</span>',
            color,
            obj.get_moderation_status_display()
        )
    
    @display(description='Helpful Score')
    def helpful_score(self, obj):
        if obj.total_votes == 0:
            return "No votes yet"
        percentage = obj.helpful_percentage
        return f"{obj.helpful_votes}/{obj.total_votes} ({percentage:.0f}%)"
    
    def has_add_permission(self, request):
        # Reviews should only be created by users via API
        return False
    
    def has_delete_permission(self, request, obj=None):
        # Only superusers can delete reviews
        return request.user.is_superuser
    
    actions = ['approve_reviews', 'reject_reviews']
    
    @admin.action(description='Approve selected reviews')
    def approve_reviews(self, request, queryset):
        count = 0
        for review in queryset.filter(moderation_status='pending'):
            review.approve(request.user, 'Bulk approved from admin')
            count += 1
        self.message_user(request, f'{count} reviews approved.')
    
    @admin.action(description='Reject selected reviews')
    def reject_reviews(self, request, queryset):
        count = 0
        for review in queryset.filter(moderation_status='pending'):
            review.reject(request.user, 'Bulk rejected from admin')
            count += 1
        self.message_user(request, f'{count} reviews rejected.')


@admin.register(ReviewHelpfulVote)
class ReviewHelpfulVoteAdmin(ModelAdmin):
    list_display = [
        'id',
        'review_link',
        'user_link',
        'vote_type',
        'created',
    ]
    list_filter = [
        'is_helpful',
        'created',
    ]
    search_fields = [
        'review__title',
        'user__username',
        'user__email',
    ]
    readonly_fields = [
        'review',
        'user',
        'is_helpful',
        'created',
        'modified',
    ]
    list_per_page = 50
    
    @display(description='Review', ordering='review__title')
    def review_link(self, obj):
        from django.urls import reverse
        url = reverse('admin:reviews_review_change', args=[obj.review.pk])
        return format_html('<a href="{}">{}</a>', url, obj.review.title)
    
    @display(description='User', ordering='user__username')
    def user_link(self, obj):
        from django.urls import reverse
        url = reverse('admin:users_user_change', args=[obj.user.pk])
        return format_html('<a href="{}">{}</a>', url, obj.user.username)
    
    @display(description='Vote', ordering='is_helpful')
    def vote_type(self, obj):
        if obj.is_helpful:
            return format_html('<span style="color: green;">👍 Helpful</span>')
        else:
            return format_html('<span style="color: red;">👎 Not Helpful</span>')
    
    def has_add_permission(self, request):
        # Votes should only be created by users via API
        return False
    
    def has_change_permission(self, request, obj=None):
        # Votes should not be changed after creation
        return False
    
    def has_delete_permission(self, request, obj=None):
        # Only superusers can delete votes
        return request.user.is_superuser