from django.db import models from django.urls import reverse from django.utils.text import slugify from django.contrib.contenttypes.fields import GenericRelation from django.core.exceptions import ValidationError from decimal import Decimal, ROUND_DOWN, InvalidOperation from typing import Tuple, Optional, Any, TYPE_CHECKING import pghistory from operators.models import Operator from property_owners.models import PropertyOwner from media.models import Photo from history_tracking.models import TrackedModel from location.models import Location if TYPE_CHECKING: from rides.models import Ride @pghistory.track() class Park(TrackedModel): id: int # Type hint for Django's automatic id field STATUS_CHOICES = [ ("OPERATING", "Operating"), ("CLOSED_TEMP", "Temporarily Closed"), ("CLOSED_PERM", "Permanently Closed"), ("UNDER_CONSTRUCTION", "Under Construction"), ("DEMOLISHED", "Demolished"), ("RELOCATED", "Relocated"), ] name = models.CharField(max_length=255) slug = models.SlugField(max_length=255, unique=True) description = models.TextField(blank=True) status = models.CharField( max_length=20, choices=STATUS_CHOICES, default="OPERATING" ) # Location fields using GenericRelation location = GenericRelation(Location, related_query_name='park') # Details opening_date = models.DateField(null=True, blank=True) closing_date = models.DateField(null=True, blank=True) operating_season = models.CharField(max_length=255, blank=True) size_acres = models.DecimalField( max_digits=10, decimal_places=2, null=True, blank=True ) website = models.URLField(blank=True) # Statistics average_rating = models.DecimalField( max_digits=3, decimal_places=2, null=True, blank=True ) ride_count = models.IntegerField(null=True, blank=True) coaster_count = models.IntegerField(null=True, blank=True) # Relationships operator = models.ForeignKey( Operator, on_delete=models.SET_NULL, null=True, blank=True, related_name="parks" ) property_owner = models.ForeignKey( PropertyOwner, on_delete=models.SET_NULL, null=True, blank=True, related_name="owned_parks" ) photos = GenericRelation(Photo, related_query_name="park") areas: models.Manager['ParkArea'] # Type hint for reverse relation rides: models.Manager['Ride'] # Type hint for reverse relation from rides app # Metadata created_at = models.DateTimeField(auto_now_add=True, null=True) updated_at = models.DateTimeField(auto_now=True) class Meta: ordering = ["name"] def __str__(self) -> str: return self.name def save(self, *args: Any, **kwargs: Any) -> None: from django.contrib.contenttypes.models import ContentType from history_tracking.models import HistoricalSlug # Get old instance if it exists if self.pk: try: old_instance = type(self).objects.get(pk=self.pk) old_name = old_instance.name old_slug = old_instance.slug except type(self).DoesNotExist: old_name = None old_slug = None else: old_name = None old_slug = None # Generate new slug if name has changed or slug is missing if not self.slug or (old_name and old_name != self.name): self.slug = slugify(self.name) # Save the model super().save(*args, **kwargs) # If slug has changed, save historical record if old_slug and old_slug != self.slug: HistoricalSlug.objects.create( content_type=ContentType.objects.get_for_model(self), object_id=self.pk, slug=old_slug ) def get_absolute_url(self) -> str: return reverse("parks:park_detail", kwargs={"slug": self.slug}) def get_status_color(self) -> str: """Get Tailwind color classes for park status""" status_colors = { 'OPERATING': 'bg-green-100 text-green-800', 'CLOSED_TEMP': 'bg-yellow-100 text-yellow-800', 'CLOSED_PERM': 'bg-red-100 text-red-800', 'UNDER_CONSTRUCTION': 'bg-blue-100 text-blue-800', 'DEMOLISHED': 'bg-gray-100 text-gray-800', 'RELOCATED': 'bg-purple-100 text-purple-800', } return status_colors.get(self.status, 'bg-gray-100 text-gray-500') @property def formatted_location(self) -> str: if self.location.exists(): location = self.location.first() if location: return location.get_formatted_address() return "" @property def coordinates(self) -> Optional[Tuple[float, float]]: """Returns coordinates as a tuple (latitude, longitude)""" if self.location.exists(): location = self.location.first() if location: return location.coordinates return None @classmethod def get_by_slug(cls, slug: str) -> Tuple['Park', bool]: """Get park by current or historical slug""" from django.contrib.contenttypes.models import ContentType from history_tracking.models import HistoricalSlug print(f"\nLooking up slug: {slug}") try: park = cls.objects.get(slug=slug) print(f"Found current park with slug: {slug}") return park, False except cls.DoesNotExist: print(f"No current park found with slug: {slug}") # Try historical slugs in HistoricalSlug model content_type = ContentType.objects.get_for_model(cls) print(f"Searching HistoricalSlug with content_type: {content_type}") historical = HistoricalSlug.objects.filter( content_type=content_type, slug=slug ).order_by('-created_at').first() if historical: print(f"Found historical slug record for object_id: {historical.object_id}") try: park = cls.objects.get(pk=historical.object_id) print(f"Found park from historical slug: {park.name}") return park, True except cls.DoesNotExist: print(f"Park not found for historical slug record") pass else: print("No historical slug record found") # Try pghistory events print(f"Searching pghistory events") event_model = getattr(cls, 'event_model', None) if event_model: historical_event = event_model.objects.filter( slug=slug ).order_by('-pgh_created_at').first() if historical_event: print(f"Found pghistory event for pgh_obj_id: {historical_event.pgh_obj_id}") try: park = cls.objects.get(pk=historical_event.pgh_obj_id) print(f"Found park from pghistory: {park.name}") return park, True except cls.DoesNotExist: print(f"Park not found for pghistory event") pass else: print("No pghistory event found") raise cls.DoesNotExist("No park found with this slug") @pghistory.track() class ParkArea(TrackedModel): id: int # Type hint for Django's automatic id field park = models.ForeignKey(Park, on_delete=models.CASCADE, related_name="areas") name = models.CharField(max_length=255) slug = models.SlugField(max_length=255) description = models.TextField(blank=True) opening_date = models.DateField(null=True, blank=True) closing_date = models.DateField(null=True, blank=True) # Metadata created_at = models.DateTimeField(auto_now_add=True, null=True) updated_at = models.DateTimeField(auto_now=True) class Meta: ordering = ["name"] unique_together = ["park", "slug"] def __str__(self) -> str: return f"{self.name} at {self.park.name}" def save(self, *args: Any, **kwargs: Any) -> None: # Always update slug when name changes self.slug = slugify(self.name) super().save(*args, **kwargs) def get_absolute_url(self) -> str: return reverse( "parks:area_detail", kwargs={"park_slug": self.park.slug, "area_slug": self.slug}, ) @classmethod def get_by_slug(cls, slug: str) -> Tuple['ParkArea', bool]: """Get area by current or historical slug""" try: return cls.objects.get(slug=slug), False except cls.DoesNotExist: # Check pghistory events event_model = getattr(cls, 'event_model', None) if event_model: historical_event = event_model.objects.filter( slug=slug ).order_by('-pgh_created_at').first() if historical_event: try: return cls.objects.get(pk=historical_event.pgh_obj_id), True except cls.DoesNotExist: pass raise cls.DoesNotExist("No park area found with this slug")