from django.db import models


class File(models.Model):
    name = models.CharField(max_length=500, help_text="Display name or filename")
    path = models.CharField(max_length=1000, blank=True, help_text="Path relative to content root")
    mime_type = models.CharField(max_length=100, help_text="MIME type of the entity (e.g. application/pdf, application/x-folder)")

    parent = models.ForeignKey(
        'self',
        on_delete=models.CASCADE,
        null=True,
        blank=True,
        related_name='children',
        help_text="Parent folder or parent document (for sidecars/sub-entries)"
    )

    # File storage
    file_content = models.FileField(upload_to='uploads/', null=True, blank=True, help_text="Uploaded file content")

    # Content storage
    text = models.TextField(blank=True, help_text="Text content, OCR, or embedded query")
    external_url = models.URLField(blank=True, help_text="External link (e.g. YouTube)")

    # Metadata
    metadata = models.JSONField(default=dict, blank=True, help_text="Frontmatter (created_at, user, etc.)")

    # Ownership and house-keeping
    user = models.ForeignKey('quiz.QuizUser', on_delete=models.CASCADE, related_name='files')
    created_at = models.DateTimeField(auto_now_add=True)
    updated_at = models.DateTimeField(auto_now=True)

    class Meta:
        verbose_name = "File"
        verbose_name_plural = "Files"

    def __str__(self):
        return f"[{self.mime_type}] {self.name}"