"""Artifact model - task deliverables with versioning."""
from sqlalchemy import Column, String, Integer, Text, ForeignKey
from app.models.base import Base, TimestampMixin, TenantMixin


class Artifact(Base, TimestampMixin, TenantMixin):
    """An artifact is a deliverable produced by a task.

    Supports versioning: each task can have multiple artifact versions.
    Type: text, code, document, data, image, mixed
    """
    __tablename__ = "artifacts"

    id = Column(Integer, primary_key=True, autoincrement=True)
    task_id = Column(Integer, ForeignKey("tasks.id"), nullable=False, index=True)
    project_id = Column(Integer, ForeignKey("projects.id"), nullable=False)

    title = Column(String(500), nullable=False)
    content = Column(Text, default="")
    artifact_type = Column(String(50), default="text")

    # Versioning
    version = Column(Integer, default=1)
    is_latest = Column(String(10), default="true")

    # Source attribution
    created_by_user_id = Column(Integer, ForeignKey("users.id"), nullable=True)
    created_by_worker_id = Column(Integer, ForeignKey("ai_workers.id"), nullable=True)

    # Source references (for traceability - JSON array of source citations)
    sources = Column(Text, default="[]")

    def __repr__(self):
        return f"<Artifact {self.title} v{self.version}>"