import uuid
from datetime import datetime

from sqlalchemy import Column, String, Text, DateTime, ForeignKey, Enum
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import relationship

from app.database import Base
from app.models.enums import TeamSide


class Evidence(Base):
    """
    Evidence model for storing file metadata associated with tests.
    
    Files are stored in MinIO, and this model tracks the file location,
    integrity hash, and upload metadata.
    
    The ``team`` field distinguishes whether this evidence was uploaded by
    Red Team (attack evidence) or Blue Team (detection evidence).
    """
    __tablename__ = "evidences"

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    test_id = Column(UUID(as_uuid=True), ForeignKey("tests.id"), nullable=False)
    file_name = Column(String, nullable=False)
    file_path = Column(String, nullable=False)  # Path in MinIO
    sha256_hash = Column(String, nullable=False)
    uploaded_by = Column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
    uploaded_at = Column(DateTime, default=datetime.utcnow)
    team = Column(Enum(TeamSide, name="teamside"), nullable=False, default=TeamSide.red)
    notes = Column(Text, nullable=True)

    # Relationships
    test = relationship("Test", back_populates="evidences")
    uploader = relationship("User", foreign_keys=[uploaded_by])