"""
Resource ORM model - File management
"""
from sqlalchemy import Column, String, Integer, TIMESTAMP, ForeignKey, CheckConstraint, Index
from sqlalchemy.dialects.postgresql import JSONB
from sqlalchemy.sql import func
from sqlalchemy.orm import relationship
from app.database import Base


class Resource(Base):
    """Resource files (textures, models, icons, etc.)"""

    __tablename__ = "resources"

    id = Column(Integer, primary_key=True, autoincrement=True)
    body_id = Column(
        String(50),
        ForeignKey("celestial_bodies.id", ondelete="CASCADE"),
        nullable=True,
        comment="Reference to celestial_bodies.id (optional)",
    )
    resource_type = Column(
        String(50), nullable=False, comment="Resource type"
    )
    file_path = Column(
        String(500),
        nullable=False,
        comment="Relative path from upload directory",
    )
    file_size = Column(Integer, nullable=True, comment="File size in bytes")
    mime_type = Column(String(100), nullable=True, comment="MIME type")
    extra_data = Column(JSONB, nullable=True, comment="Extended metadata (JSON)")
    created_at = Column(TIMESTAMP, server_default=func.now())
    updated_at = Column(TIMESTAMP, server_default=func.now(), onupdate=func.now())

    # Relationship
    body = relationship("CelestialBody", back_populates="resources")

    # Constraints and indexes
    __table_args__ = (
        CheckConstraint(
            "resource_type IN ('texture', 'model', 'icon', 'thumbnail', 'data')",
            name="chk_resource_type",
        ),
        Index("idx_resources_body_id", "body_id"),
        Index("idx_resources_type", "resource_type"),
        Index("idx_resources_unique", "body_id", "resource_type", "file_path", unique=True),
    )

    def __repr__(self):
        return f"<Resource(id={self.id}, body_id='{self.body_id}', type='{self.resource_type}', path='{self.file_path}')>"