from django.contrib import admin
from django.shortcuts import render
from .models import Product, Color, Size, Order, OrderItem, GuestUser, Coupon, CouponUsage, OrderStatus
from django.utils.html import format_html

@admin.register(Product)
class ProductAdmin(admin.ModelAdmin):
    list_display = ("title", "ordering_value", "price", "cut")

@admin.register(Color)
class ColorAdmin(admin.ModelAdmin):
    list_display = ("color_preview", "name", "ordering", "colorHex", "secondary_hex_color")
    list_editable = ("ordering",)
    ordering = ["ordering"]
    search_fields = ["name"]
    list_per_page = 20

    def color_preview(self, obj):
        if obj.secondary_hex_color:
            return format_html(
                '<div style="background-image: linear-gradient(to right, {} 50%, {} 50%); '
                'width: 60px; height: 30px; border-radius: 15px; border: 1px solid #ddd;"></div>',
                obj.colorHex, obj.secondary_hex_color
            )
        return format_html(
            '<div style="background-color: {}; width: 60px; height: 30px; '
            'border-radius: 15px; border: 1px solid #ddd;"></div>',
            obj.colorHex
        )

@admin.register(Size)
class SizeAdmin(admin.ModelAdmin):
    list_display = ("name",)

class OrderItemInline(admin.TabularInline):
    model = OrderItem
    extra = 0
    readonly_fields = ('product', 'quantity', 'color', 'size', 'price')

@admin.register(Order)
class OrderAdmin(admin.ModelAdmin):
    list_display = ('id', 'date_ordered', 'status', 'total_price')
    inlines = [OrderItemInline]
    list_filter = ('status', 'payment_status')

    def changelist_view(self, request, extra_context=None):
        # If 'show_preparation' parameter is in the request, show the preparation view
        if 'show_preparation' in request.GET:
            return self.preparation_view(request)

        # Otherwise show the normal change list
        extra_context = extra_context or {}
        paid_orders_count = Order.objects.filter(status=OrderStatus.PAID).count()
        extra_context['paid_orders_count'] = paid_orders_count
        return super().changelist_view(request, extra_context=extra_context)

    def preparation_view(self, request):
        """View for items that need to be prepared"""
        # Get paid orders
        orders = Order.objects.filter(status=OrderStatus.PAID).order_by('-date_ordered')

        # Group items by product, color, size
        items_by_variant = {}
        all_items = OrderItem.objects.filter(order__status=OrderStatus.PAID)

        for item in all_items:
            # Create a key for grouping items
            key = (
                str(item.product.id),
                str(item.color.id) if item.color else 'none',
                str(item.size.id) if item.size else 'none'
            )

            if key not in items_by_variant:
                items_by_variant[key] = {
                    'product': item.product,
                    'color': item.color,
                    'size': item.size,
                    'quantity': 0,
                    'orders': set()
                }

            items_by_variant[key]['quantity'] += item.quantity
            items_by_variant[key]['orders'].add(item.order.id)

        # Convert to list and sort
        items_list = list(items_by_variant.values())
        items_list.sort(key=lambda x: x['product'].title)

        context = {
            'title': 'Orders to Prepare',
            'app_label': 'shop',
            'opts': Order._meta,
            'orders': orders,
            'items': items_list,
            'total_orders': orders.count(),
            'total_items': sum(i['quantity'] for i in items_list)
        }

        return render(
            request,
            'admin/shop/order/preparation_view.html',
            context
        )

class GuestUserOrderInline(admin.TabularInline):
    model = Order
    extra = 0
    readonly_fields = ('date_ordered', 'total_price')
    can_delete = False
    show_change_link = True
    exclude = ('user',)  # Exclude the user field from the inline display

@admin.register(GuestUser)
class GuestUserAdmin(admin.ModelAdmin):
    list_display = ('email', 'phone')
    inlines = [GuestUserOrderInline]

@admin.register(Coupon)
class CouponAdmin(admin.ModelAdmin):
    list_display = ('code', 'discount_amount', 'discount_percent', 'is_active',
                   'valid_from', 'valid_to', 'current_uses', 'max_uses')
    list_filter = ('is_active', 'valid_from', 'valid_to')
    search_fields = ('code', 'description')
    readonly_fields = ('current_uses', 'created_at', 'stripe_coupon_id')
    fieldsets = (
        ('Basic Information', {
            'fields': ('code', 'description', 'is_active')
        }),
        ('Discount', {
            'fields': ('discount_amount', 'discount_percent')
        }),
        ('Validity', {
            'fields': ('valid_from', 'valid_to', 'max_uses', 'current_uses')
        }),
        ('Stripe Information', {
            'fields': ('stripe_coupon_id',),
            'classes': ('collapse',)
        }),
    )

@admin.register(CouponUsage)
class CouponUsageAdmin(admin.ModelAdmin):
    list_display = ('coupon', 'user', 'guest_email', 'order', 'used_at')
    list_filter = ('used_at',)
    search_fields = ('coupon__code', 'user__username', 'user__email', 'guest_email')
    readonly_fields = ('used_at',)