from django.contrib.gis import admin
from django.utils.html import format_html

from .models import (
    Product, ProductCategory, Warehouse, WarehouseLocation, Stock, StockMovement,
    PurchaseOrder, PurchaseOrderItem, PreparationOrder, PreparationOrderItem,
    ProductionOrder,
    SerializedItem, SerializedItemEvent,
)

class CustomGeoAdmin(admin.GISModelAdmin):
    gis_widget_kwargs = {
        'attrs': {
            "default_lon" : 4.3517,  # Bruxelles (par exemple)
            "default_lat" : 50.8503,
            "default_zoom" : 12
            },
    }



@admin.register(Warehouse)
class WarehouseAdmin(CustomGeoAdmin):
    list_display = ('name', 'location', 'manager')
    search_fields = ('name', 'location', 'manager')

@admin.register(WarehouseLocation)
class WarehouseLocationAdmin(CustomGeoAdmin):
    list_display = ('name', 'warehouse', 'is_default')
    list_filter = ('warehouse',)
    search_fields = ('name', 'warehouse__name')

@admin.register(ProductCategory)
class ProductCategoryAdmin(admin.ModelAdmin):
    list_display = ('name_fr', 'name_en', 'name_nl')
    search_fields = ('name_fr', 'name_en', 'name_nl')

@admin.register(Product)
class ProductAdmin(admin.ModelAdmin):
    list_display = ('name', 'code', 'category', 'unit', 'price', 'qr_code_preview')
    search_fields = ('name', 'code', 'category__name_fr')
    list_filter = ('category', 'unit')
    readonly_fields = ('qr_code_preview',)

    def qr_code_preview(self, obj):
        if obj.qr_code:
            return format_html('<img src="{}" style="height:80px;width:80px;" />', obj.qr_code.url)
        return "—"
    qr_code_preview.short_description = 'QR Code'


@admin.register(Stock)
class StockAdmin(admin.ModelAdmin):
    list_display = ('product', 'location', 'quantity')
    search_fields = ('product__name', 'location__name')
    list_filter = ('location',)

@admin.register(StockMovement)
class StockMovementAdmin(admin.ModelAdmin):
    list_display = ('product', 'source_location', 'destination_location', 'quantity', 'date', 'reason')
    search_fields = ('product__name', 'source_location__name', 'destination_location__name')
    list_filter = ('date', 'product')


class PurchaseOrderItemInline(admin.TabularInline):
    model = PurchaseOrderItem
    extra = 1
    fields = ('product', 'location', 'num_articles', 'quantity_per_article', 'quantity')

@admin.register(PurchaseOrder)
class PurchaseOrderAdmin(admin.ModelAdmin):
    list_display = ('id', 'supplier', 'date_ordered')
    search_fields = ('supplier__name',)
    list_filter = ('date_ordered',)
    inlines = [PurchaseOrderItemInline]

@admin.register(PurchaseOrderItem)
class PurchaseOrderItemAdmin(admin.ModelAdmin):
    list_display = ('purchase_order', 'product', 'quantity')
    search_fields = ('purchase_order__id', 'product__name')


class PreparationOrderItemInline(admin.TabularInline):
    model = PreparationOrderItem
    extra = 1

@admin.register(PreparationOrder)
class PreparationOrderAdmin(admin.ModelAdmin):
    list_display = ('order_number', 'date', 'status', 'priority')
    search_fields = ('order_number',)
    list_filter = ('status', 'date', 'priority')
    inlines = [PreparationOrderItemInline]

    def get_readonly_fields(self, request, obj=None):
        if obj:  # editing an existing object
            return self.readonly_fields + ('priority',)
        return self.readonly_fields

@admin.register(PreparationOrderItem)
class PreparationOrderItemAdmin(admin.ModelAdmin):
    list_display = ('preparation_order', 'product', 'quantity')
    search_fields = ('preparation_order__order_number', 'product__name')


# class ProductDesignComponentInline(admin.TabularInline):
#     model = ProductDesignComponent
#     extra = 1
#
# @admin.register(ProductDesign)
# class ProductDesignAdmin(admin.ModelAdmin):
#     list_display = ('code', 'name', 'category', 'status', 'output_product', 'created_at')
#     search_fields = ('code', 'name', 'output_product__name')
#     list_filter = ('status', 'category')
#     inlines = [ProductDesignComponentInline]
#     raw_id_fields = ('output_product',)
#
# @admin.register(ProductDesignComponent)
# class ProductDesignComponentAdmin(admin.ModelAdmin):
#     list_display = ('product_design', 'product', 'quantity')
#     search_fields = ('product_design__name', 'product__name')

@admin.register(ProductionOrder)
class ProductionOrderAdmin(admin.ModelAdmin):
    list_display = ('code', 'warehouse', 'quantity', 'status', 'output_product', 'created_at')
    search_fields = ('code', 'output_product__name', 'output_product_name')
    list_filter = ('status', 'warehouse')
    raw_id_fields = ('output_product', 'output_location')


class SerializedItemEventInline(admin.TabularInline):
    model = SerializedItemEvent
    extra = 0
    readonly_fields = ('created_at', 'created_by')
    fields = ('event_type', 'date', 'person', 'from_location', 'to_location', 'notes', 'created_by', 'created_at')


@admin.register(SerializedItem)
class SerializedItemAdmin(admin.ModelAdmin):
    list_display = ('serial_number', 'product', 'status', 'current_holder', 'current_location', 'created_at')
    list_filter = ('status', 'product')
    search_fields = ('serial_number', 'product__name', 'product__code')
    inlines = [SerializedItemEventInline]


@admin.register(SerializedItemEvent)
class SerializedItemEventAdmin(admin.ModelAdmin):
    list_display = ('item', 'event_type', 'date', 'person', 'created_by')
    list_filter = ('event_type',)
    search_fields = ('item__serial_number', 'item__product__name')