from django.db import models
from django.conf import settings
from django.utils.translation import gettext_lazy as _
from django.core.validators import RegexValidator
from phonenumber_field.modelfields import PhoneNumberField
from utils.validators import validate_possible_number


class AppVersion(models.Model):
    """
    Model for storing mobile application releases and APK downloads
    """
    class AppType(models.TextChoices):
        GOOGLE_PLAY = 'google_play', _('Google Play')
        APP_STORE = 'app_store', _('Apple App Store')
        DIRECT = 'direct', _('Direct Download')

    version = models.CharField(
        max_length=20,
        unique=True,
        validators=[
            RegexValidator(
                regex=r'^\d+\.\d+\.\d+$',
                message='Version must be in format X.Y.Z (e.g., 1.0.0)'
            )
        ],
        verbose_name=_('Version'),
        help_text=_('Application version in format X.Y.Z (e.g., 1.0.0)')
    )

    apk_file = models.FileField(
        upload_to='app_versions/',
        verbose_name=_('APK File'),
        help_text=_('Application APK / binary file'),
        null=True,
        blank=True,
    )

    description = models.TextField(
        verbose_name=_('Description'),
        help_text=_('Release notes and changes for this version'),
        blank=True
    )

    app_type = models.CharField(
        max_length=20,
        choices=AppType.choices,
        default=AppType.GOOGLE_PLAY,
        verbose_name=_('App Distribution Platform')
    )

    downloads_count = models.PositiveBigIntegerField(
        default=0,
        verbose_name=_('Downloads Count')
    )

    is_active = models.BooleanField(
        default=True,
        verbose_name=_('Active'),
        help_text=_('Is this version currently active?')
    )

    created_at = models.DateTimeField(
        auto_now_add=True,
        verbose_name=_('Created At')
    )

    updated_at = models.DateTimeField(
        auto_now=True,
        verbose_name=_('Updated At')
    )

    class Meta:
        verbose_name = _('App Version')
        verbose_name_plural = _('App Versions')
        ordering = ['-created_at']

    def __str__(self):
        return f'Version {self.version} ({self.get_app_type_display()})'

    @classmethod
    def get_latest_active(cls):
        return cls.objects.filter(is_active=True).order_by('-created_at').first()


class SupportMessage(models.Model):
    """
    Model for user contact & support inquiries
    """
    sender_name = models.CharField(
        max_length=255,
        verbose_name=_('Sender Name'),
    )
    sender_email = models.EmailField(
        verbose_name=_('Sender Email'),
    )
    subject = models.CharField(
        max_length=255,
        verbose_name=_('Subject'),
    )
    sender_phone = PhoneNumberField(
        validators=[validate_possible_number],
        blank=True,
        null=True,
        verbose_name=_('Sender Phone'),
    )
    message = models.TextField(
        verbose_name=_('Message'),
    )
    is_resolved = models.BooleanField(
        default=False,
        verbose_name=_('Resolved'),
    )
    created_at = models.DateTimeField(
        auto_now_add=True,
        verbose_name=_('Created At'),
    )

    class Meta:
        verbose_name = _('Support Message')
        verbose_name_plural = _('Support Messages')
        ordering = ['-created_at']

    def __str__(self):
        return f'{self.sender_name} - {self.subject}'