"""代码符号引用关系模型。"""

from __future__ import annotations

from typing import Any, Optional

from sqlalchemy import ForeignKey, Integer, VARCHAR, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column

from .base import Base
from .types import JSONB


class SymbolReference(Base):
    __tablename__ = "symbol_references"
    __table_args__ = (
        UniqueConstraint(
            "tenant_id",
            "file_path",
            "relation_type",
            "target_symbol_name",
            "start_line",
            "source_symbol_id",
            name="uq_symbol_references_tenant_file_relation_target_line_source",
        ),
    )

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    source_symbol_id: Mapped[Optional[int]] = mapped_column(
        Integer,
        ForeignKey("symbol_definitions.id", ondelete="CASCADE"),
        nullable=True,
        index=True,
    )
    file_path: Mapped[str] = mapped_column(VARCHAR(600), nullable=False, index=True)
    relation_type: Mapped[str] = mapped_column(VARCHAR(32), nullable=False, index=True)
    target_symbol_name: Mapped[str] = mapped_column(VARCHAR(255), nullable=False, index=True)
    target_qualified_name: Mapped[Optional[str]] = mapped_column(VARCHAR(700), nullable=True, index=True)
    start_line: Mapped[Optional[int]] = mapped_column(Integer, nullable=True, index=True)
    end_line: Mapped[Optional[int]] = mapped_column(Integer, nullable=True)
    payload: Mapped[Optional[Any]] = mapped_column(JSONB, nullable=True)