"""Worklog model — immutable internal time-tracking records."""

import uuid
from datetime import datetime

from sqlalchemy import Column, String, Integer, DateTime, ForeignKey, Text, Index
from sqlalchemy.dialects.postgresql import UUID, JSONB
from sqlalchemy.orm import relationship

from app.database import Base


class Worklog(Base):
    """Internal worklog entry with integrity hash for audit compliance.

    Each worklog is tied to an Aegis entity (test, campaign, etc.) and
    optionally synced to Tempo.  The ``integrity_hash`` is a SHA-256 of
    the immutable fields so tampering can be detected.
    """

    __tablename__ = "worklogs"

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    entity_type = Column(String(50), nullable=False)
    entity_id = Column(UUID(as_uuid=True), nullable=False)
    user_id = Column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
    activity_type = Column(String(100), nullable=False)
    started_at = Column(DateTime, nullable=False)
    ended_at = Column(DateTime)
    duration_seconds = Column(Integer, nullable=False)
    description = Column(Text)
    tempo_synced = Column(DateTime)
    tempo_worklog_id = Column(String(100))
    integrity_hash = Column(String(64))
    created_at = Column(DateTime, default=datetime.utcnow)
    extra_metadata = Column("metadata", JSONB, default={})

    user = relationship("User", foreign_keys=[user_id])

    __table_args__ = (
        Index("ix_worklogs_entity_id", "entity_id"),
        Index("ix_worklogs_user_id", "user_id"),
        Index("ix_worklogs_entity_type_entity_id", "entity_type", "entity_id"),
    )