"""Audit trail for notes posted to PSA systems."""
import uuid
from datetime import datetime, timezone
from typing import Optional

from sqlalchemy import String, DateTime, Text, Integer, ForeignKey
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy.dialects.postgresql import UUID

from app.core.database import Base


class PsaPostLog(Base):
    __tablename__ = "psa_post_log"

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    # Legacy sessions FK (nullable for AI sessions)
    session_id: Mapped[Optional[uuid.UUID]] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("sessions.id", ondelete="CASCADE"),
        nullable=True,
        index=True,
    )
    # AI sessions FK (Phase 2)
    ai_session_id: Mapped[Optional[uuid.UUID]] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("ai_sessions.id", ondelete="CASCADE"),
        nullable=True,
        index=True,
    )
    psa_connection_id: Mapped[Optional[uuid.UUID]] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("psa_connections.id", ondelete="SET NULL"),
        nullable=True,
    )
    account_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("accounts.id", ondelete="CASCADE"),
        nullable=False,
        index=True,
    )
    ticket_id: Mapped[str] = mapped_column(String(100), nullable=False)
    note_type: Mapped[str] = mapped_column(String(50), nullable=False)
    content_posted: Mapped[str] = mapped_column(Text, nullable=False)
    external_note_id: Mapped[Optional[str]] = mapped_column(
        String(100), nullable=True
    )
    status: Mapped[str] = mapped_column(
        String(20), nullable=False
    )  # 'success', 'failed', 'pending_retry'
    error_message: Mapped[Optional[str]] = mapped_column(Text, nullable=True)
    retry_count: Mapped[int] = mapped_column(
        Integer, nullable=False, default=0,
        comment="Number of retry attempts for failed PSA pushes",
    )
    next_retry_at: Mapped[Optional[datetime]] = mapped_column(
        DateTime(timezone=True), nullable=True,
        comment="When to attempt the next retry",
    )
    status_changed_from: Mapped[Optional[str]] = mapped_column(
        String(100), nullable=True
    )
    status_changed_to: Mapped[Optional[str]] = mapped_column(
        String(100), nullable=True
    )
    posted_by: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("users.id"), nullable=False
    )
    posted_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        nullable=False,
        default=lambda: datetime.now(timezone.utc),
    )

    # Relationships
    session = relationship("Session", foreign_keys=[session_id])
    ai_session = relationship("AISession", foreign_keys=[ai_session_id])
    psa_connection = relationship("PsaConnection", foreign_keys=[psa_connection_id])
    user = relationship("User", foreign_keys=[posted_by])