it_manager+reports: иерархия договоров, биллинг и месячные отчёты

Иерархия рамочных/дочерних договоров и платежей, интернет-биллинг,
месячные IT-отчёты (импорт, DOCX/PDF, шаблоны выводов).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/it_manager/admin.py

@@ -1,5 +1,6 @@
 from django import forms
 from django.contrib import admin
+from django.core.exceptions import ValidationError
 from django.utils import timezone
 from django.utils.html import format_html
 from django.utils.safestring import mark_safe
@@ -9,7 +10,7 @@ from unfold.admin import ModelAdmin, TabularInline
 from .models import (
     Equipment, EquipmentAssignment, EquipmentModel,
     Ticket, TicketComment,
-    InternetProvider, InternetContract,
+    InternetProvider, InternetContract, InternetContractPayment,
     WorkLog, ServiceCall,
     Consumable,
 )
@@ -17,23 +18,28 @@ from .models import (
 
 class LocationChoiceField(forms.ModelChoiceField):
     def label_from_instance(self, obj):
-        type_label = obj.get_location_type_display()
-        addr = obj.get_full_address() or obj.address or ''
-        if obj.location_type == 'pharmacy':
-            try:
-                num = obj.pharmacy.pharmacy_number
-                return f'Аптека №{num} — {addr}'
-            except Exception:
-                pass
-        return f'{type_label} — {addr}' if addr else type_label
+        return str(obj)
 
 
 class InternetContractForm(forms.ModelForm):
     location = LocationChoiceField(
         queryset=None,
+        required=False,
         label=_('Локация'),
     )
 
+    def clean(self):
+        cleaned = super().clean()
+        is_framework = cleaned.get('is_framework')
+        location = cleaned.get('location')
+        if is_framework and location:
+            raise ValidationError({'location': _('У рамочного договора локация не указывается.')})
+        if not is_framework and not location:
+            raise ValidationError({'location': _('Укажите локацию для договора.')})
+        if is_framework:
+            cleaned['location'] = None
+        return cleaned
+
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
         from apps.locations.models import Location
@@ -400,12 +406,20 @@ class TicketAdmin(ModelAdmin):
 
 class InternetContractInline(TabularInline):
     model = InternetContract
+    form = InternetContractForm
     extra = 0
-    fields = ('location', 'contract_number', 'service_type', 'status',
-              'bandwidth_down', 'bandwidth_up', 'monthly_cost', 'end_date')
+    fields = ('location', 'contract_number', 'is_framework', 'parent_contract', 'service_type', 'status',
+              'start_date', 'bandwidth_down', 'bandwidth_up', 'monthly_cost', 'end_date')
     show_change_link = True
 
 
+class InternetContractPaymentInline(TabularInline):
+    model = InternetContractPayment
+    extra = 0
+    fields = ('period', 'amount', 'is_paid', 'paid_at', 'invoice_number', 'recorded_by')
+    readonly_fields = ('recorded_by',)
+
+
 @admin.register(InternetProvider)
 class InternetProviderAdmin(ModelAdmin):
     list_display  = ['name', 'phone', 'support_phone', 'email',
@@ -443,8 +457,10 @@ class InternetProviderAdmin(ModelAdmin):
 @admin.register(InternetContract)
 class InternetContractAdmin(ModelAdmin):
     form = InternetContractForm
+    inlines = [InternetContractPaymentInline]
     list_display  = [
-        'provider', 'location', 'contract_number', 'service_type_display',
+        'provider', 'location', 'contract_number', 'is_framework', 'parent_contract',
+        'service_type_display',
         'connection_type_display', 'status_display', 'bandwidth_display',
         'monthly_cost', 'end_date', 'expiry_display',
     ]
@@ -459,10 +475,12 @@ class InternetContractAdmin(ModelAdmin):
     fieldsets = (
         (_('Договор'), {
             'fields': ('provider', 'contract_number', 'account_number',
+                       'is_framework', 'parent_contract',
                        'service_type', 'connection_type', 'status'),
         }),
         (_('Локация'), {
             'fields': ('location',),
+            'description': _('Для рамочного договора локация не указывается.'),
         }),
         (_('Параметры'), {
             'fields': ('bandwidth_down', 'bandwidth_up', 'monthly_cost'),