from django.contrib import admin
from django.shortcuts import redirect

from .models import BazaarPurchase, BazaarSettings, FeatureActivation, FeaturePlan, FeaturePlanTier, GemPack, GemTransaction


@admin.register(BazaarSettings)
class BazaarSettingsAdmin(admin.ModelAdmin):
    """تک‌ردیفی — لیست را رد می‌کنیم و مستقیم فرم ویرایش همان یک ردیف را نشان می‌دهیم."""

    list_display = ("package_name", "updated_at")

    def has_add_permission(self, request):
        return not BazaarSettings.objects.exists()

    def changelist_view(self, request, extra_context=None):
        obj = BazaarSettings.get_solo()
        return redirect("admin:billing_bazaarsettings_change", obj.pk)


class FeaturePlanTierInline(admin.TabularInline):
    model = FeaturePlanTier
    extra = 1


@admin.register(FeaturePlan)
class FeaturePlanAdmin(admin.ModelAdmin):
    list_display = ("name", "key", "is_purchasable")
    search_fields = ("name", "key")
    inlines = [FeaturePlanTierInline]


@admin.register(GemPack)
class GemPackAdmin(admin.ModelAdmin):
    list_display = ("display_name", "bazaar_sku", "gem_amount", "is_active", "sort_order")
    list_editable = ("is_active", "sort_order")
    search_fields = ("display_name", "bazaar_sku")


@admin.register(FeatureActivation)
class FeatureActivationAdmin(admin.ModelAdmin):
    list_display = ("user", "feature", "expires_at", "updated_at")
    list_filter = ("feature",)
    search_fields = ("user__phone",)
    autocomplete_fields = ["user"]


@admin.register(GemTransaction)
class GemTransactionAdmin(admin.ModelAdmin):
    list_display = ("user", "amount", "reason", "created_at")
    list_filter = ("reason",)
    search_fields = ("user__phone", "note")
    readonly_fields = ("user", "amount", "reason", "note", "created_at")

    def has_add_permission(self, request):
        # تراکنش جم فقط از سرویس‌های داخلی ساخته می‌شود، نه دستی از ادمین —
        # برای اصلاح دستی از GemTransaction.Reason.ADMIN_ADJUSTMENT در شل/سرویس استفاده کن.
        return False


@admin.register(BazaarPurchase)
class BazaarPurchaseAdmin(admin.ModelAdmin):
    list_display = ("user", "gem_pack", "status", "gems_granted", "created_at", "verified_at")
    list_filter = ("status",)
    search_fields = ("user__phone", "purchase_token")
    readonly_fields = ("purchase_token", "created_at", "verified_at")