from django.contrib import admin
from django.utils.html import format_html, mark_safe

from .models import Dish


@admin.action(description='启用所选菜品（参与自动生成）')
def activate_dishes(modeladmin, request, queryset):
    queryset.update(is_active=True)


@admin.action(description='停用所选菜品（不再参与自动生成）')
def deactivate_dishes(modeladmin, request, queryset):
    queryset.update(is_active=False)


@admin.register(Dish)
class DishAdmin(admin.ModelAdmin):
    list_display = ('name', 'cuisine', 'dish_type_display', 'ingredient_detail', 'protein', 'fat', 'calorie', 'nutri_badge', 'is_active', 'created_at')
    list_filter = ('dish_type', 'cuisine', 'is_active')
    search_fields = ('name', 'ingredient_detail', 'cuisine', 'pinyin')
    list_editable = ('cuisine', 'ingredient_detail', 'protein', 'fat', 'calorie', 'is_active')
    list_per_page = 50
    actions = [activate_dishes, deactivate_dishes]
    fieldsets = (
        (None, {'fields': ('name', 'dish_type', 'cuisine', 'is_active')}),
        ('营养信息', {'fields': ('ingredient_detail', 'protein', 'fat', 'calorie')}),
        ('其他', {'fields': ('description',), 'classes': ('collapse',)}),
    )

    @admin.display(description='营养提示', ordering='calorie')
    def nutri_badge(self, obj):
        badges = []
        if obj.dish_type == 'meat' and obj.fat >= 20:
            badges.append('<span class="badge badge-danger">高脂</span>')
        if obj.dish_type == 'meat' and obj.calorie >= 300:
            badges.append('<span class="badge badge-warning">高热量</span>')
        if obj.dish_type in ('meat', 'veg') and obj.protein >= 15:
            badges.append('<span class="badge badge-success">高蛋白</span>')
        if obj.dish_type == 'veg' and obj.fat <= 3 and obj.calorie <= 60:
            badges.append('<span class="badge badge-info">清淡</span>')
        return mark_safe('&nbsp;'.join(badges)) if badges else '—'

    @admin.display(description='类型')
    def dish_type_display(self, obj):
        colors = {'meat': '#d9534f', 'veg': '#5cb85c', 'soup': '#5bc0de', 'staple': '#f0ad4e'}
        return format_html(
            '<span style="color:{};font-weight:600">{}</span>',
            colors.get(obj.dish_type, '#999'),
            dict(Dish.TYPE_CHOICES).get(obj.dish_type, obj.dish_type),
        )


admin.site.site_header = '学校订餐菜单管理系统'
admin.site.site_title = '学校订餐菜单管理'
admin.site.index_title = '菜单管理后台'