"""运行时 Run/Event 模型。"""

from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, Integer, String, Text, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column

from app.core.ids import new_event_id, new_run_id
from app.core.time import utc_now
from app.db.base import Base


class Run(Base):
    __tablename__ = "runs"

    id: Mapped[str] = mapped_column(String(80), primary_key=True, default=new_run_id)
    # rewrite/1.0：照心试演（kind=rehearsal）无正式人物，character_id 允许为空；
    # 旧 chat_sessions 外键随线性会话模型退役移除
    character_id: Mapped[str | None] = mapped_column(
        String(80), ForeignKey("characters.id"), index=True, nullable=True
    )
    # Run 归属用户（用量计量与配额裁决维度，透传神识 user_id；空 = 平台调用）
    owner_id: Mapped[str] = mapped_column(String(80), nullable=False, default="", index=True)
    status: Mapped[str] = mapped_column(String(40), nullable=False, default="queued", index=True)
    # run.kind：foreground / background_task / awakening / rehearsal（契约词典 §8.2）
    kind: Mapped[str] = mapped_column(
        String(40), nullable=False, default="foreground", server_default="foreground"
    )
    goal: Mapped[str | None] = mapped_column(String(300))
    origin: Mapped[str] = mapped_column(String(40), nullable=False, default="chat")
    model_hint: Mapped[str | None] = mapped_column(String(120))
    started_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    completed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    error_code: Mapped[str | None] = mapped_column(String(80))
    error_message: Mapped[str | None] = mapped_column(Text)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utc_now)
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), default=utc_now, onupdate=utc_now
    )


class Event(Base):
    __tablename__ = "events"
    __table_args__ = (UniqueConstraint("run_id", "sequence", name="uq_events_run_sequence"),)

    id: Mapped[str] = mapped_column(String(80), primary_key=True, default=new_event_id)
    character_id: Mapped[str | None] = mapped_column(
        String(80), ForeignKey("characters.id"), index=True, nullable=True
    )
    run_id: Mapped[str | None] = mapped_column(
        String(80), ForeignKey("runs.id"), index=True, nullable=True
    )
    type: Mapped[str] = mapped_column(String(80), nullable=False, index=True)
    source: Mapped[str] = mapped_column(String(40), nullable=False, default="system")
    payload_json: Mapped[str] = mapped_column(Text, nullable=False, default="{}")
    visibility: Mapped[str] = mapped_column(String(40), nullable=False, default="public")
    sensitivity: Mapped[str] = mapped_column(String(40), nullable=False, default="low")
    trace_id: Mapped[str | None] = mapped_column(String(80), index=True)
    parent_id: Mapped[str | None] = mapped_column(String(80))
    sequence: Mapped[int] = mapped_column(Integer, nullable=False)
    evidence_ids_json: Mapped[str] = mapped_column(Text, nullable=False, default="[]")
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=utc_now)