New Model & tokens/credits updates

backend/igny8_core/modules/billing/admin.py

@@ -8,6 +8,7 @@ from unfold.admin import ModelAdmin
 from simple_history.admin import SimpleHistoryAdmin
 from igny8_core.admin.base import AccountAdminMixin, Igny8ModelAdmin
 from igny8_core.business.billing.models import (
+    AIModelConfig,
     CreditCostConfig,
     Invoice,
     Payment,
@@ -49,11 +50,43 @@ class CreditTransactionAdmin(ExportMixin, AccountAdminMixin, Igny8ModelAdmin):
     get_account_display.short_description = 'Account'
 
 
+@admin.register(AIModelConfig)
+class AIModelConfigAdmin(Igny8ModelAdmin):
+    list_display = ['display_name', 'model_name', 'provider', 'model_type', 'tokens_per_credit', 'cost_per_1k_input_tokens', 'cost_per_1k_output_tokens', 'is_active', 'is_default']
+    list_filter = ['provider', 'model_type', 'is_active', 'is_default']
+    search_fields = ['model_name', 'display_name', 'description']
+    readonly_fields = ['created_at', 'updated_at']
+    fieldsets = (
+        ('Model Information', {
+            'fields': ('model_name', 'display_name', 'description', 'provider', 'model_type')
+        }),
+        ('Pricing', {
+            'fields': ('cost_per_1k_input_tokens', 'cost_per_1k_output_tokens', 'tokens_per_credit')
+        }),
+        ('Status', {
+            'fields': ('is_active', 'is_default')
+        }),
+        ('Timestamps', {
+            'fields': ('created_at', 'updated_at'),
+            'classes': ('collapse',)
+        }),
+    )
+    
+    def save_model(self, request, obj, form, change):
+        # If setting as default, unset other defaults of same type
+        if obj.is_default:
+            AIModelConfig.objects.filter(
+                model_type=obj.model_type,
+                is_default=True
+            ).exclude(pk=obj.pk).update(is_default=False)
+        super().save_model(request, obj, form, change)
+
+
 @admin.register(CreditUsageLog)
 class CreditUsageLogAdmin(AccountAdminMixin, Igny8ModelAdmin):
-    list_display = ['id', 'account', 'operation_type', 'credits_used', 'cost_usd', 'model_used', 'created_at']
-    list_filter = ['operation_type', 'created_at', 'account', 'model_used']
-    search_fields = ['account__name', 'model_used']
+    list_display = ['id', 'account', 'operation_type', 'credits_used', 'cost_usd', 'model_config', 'created_at']
+    list_filter = ['operation_type', 'created_at', 'account', 'model_config']
+    search_fields = ['account__name', 'model_name']
     readonly_fields = ['created_at']
     date_hierarchy = 'created_at'