from django.db import models
from simple_history.models import HistoricalRecords


class Stadium(models.Model):
    """
    Stadium/Arena/Venue model.
    """
    SURFACE_CHOICES = [
        ('grass', 'Natural Grass'),
        ('turf', 'Artificial Turf'),
        ('ice', 'Ice'),
        ('hardwood', 'Hardwood'),
        ('other', 'Other'),
    ]

    ROOF_TYPE_CHOICES = [
        ('dome', 'Dome (Closed)'),
        ('retractable', 'Retractable'),
        ('open', 'Open Air'),
    ]

    id = models.CharField(
        max_length=100,
        primary_key=True,
        help_text='Canonical ID (e.g., stadium_nba_los_angeles_lakers)'
    )
    sport = models.ForeignKey(
        'core.Sport',
        on_delete=models.CASCADE,
        related_name='stadiums'
    )
    name = models.CharField(
        max_length=200,
        help_text='Current stadium name'
    )
    city = models.CharField(max_length=100)
    state = models.CharField(
        max_length=100,
        blank=True,
        help_text='State/Province (blank for international)'
    )
    country = models.CharField(
        max_length=100,
        default='USA'
    )
    latitude = models.DecimalField(
        max_digits=9,
        decimal_places=6,
        null=True,
        blank=True
    )
    longitude = models.DecimalField(
        max_digits=9,
        decimal_places=6,
        null=True,
        blank=True
    )
    capacity = models.PositiveIntegerField(
        null=True,
        blank=True,
        help_text='Seating capacity'
    )
    surface = models.CharField(
        max_length=20,
        choices=SURFACE_CHOICES,
        blank=True
    )
    roof_type = models.CharField(
        max_length=20,
        choices=ROOF_TYPE_CHOICES,
        blank=True
    )
    opened_year = models.PositiveSmallIntegerField(
        null=True,
        blank=True,
        help_text='Year stadium opened'
    )
    timezone = models.CharField(
        max_length=50,
        blank=True,
        help_text='IANA timezone (e.g., America/Los_Angeles)'
    )
    image_url = models.URLField(
        blank=True,
        help_text='URL to stadium image'
    )

    # Metadata
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    # Audit trail
    history = HistoricalRecords()

    class Meta:
        ordering = ['sport', 'city', 'name']
        verbose_name = 'Stadium'
        verbose_name_plural = 'Stadiums'

    def __str__(self):
        return f"{self.name} ({self.city})"

    @property
    def location(self):
        """Return city, state/country string."""
        if self.state:
            return f"{self.city}, {self.state}"
        return f"{self.city}, {self.country}"