"""通用观测(EAV长表) 数据模型"""
from datetime import date

from sqlalchemy import Date, ForeignKey, Index, Integer, String, Text
from sqlalchemy.orm import Mapped, mapped_column

from app.core.base_model import MappedBase, ModelMixin, UserMixin


class ObservationModel(ModelMixin, UserMixin, MappedBase):
    """通用观测 EAV 长表（§3.2；与 tree_evaluation 经统一性状值视图归一）。

    EAV 通用观测：trait_id 可空（不强制挂性状），obs_value 按 obs_type
    (numeric/text/date) 解释，均存 text。
    """

    __tablename__ = "bre_observation"

    tree_id: Mapped[int | None] = mapped_column(
        Integer, ForeignKey("bre_tree.id", ondelete="CASCADE"), index=True, nullable=True, comment="单株(可空)", default=None
    )

    plot_id: Mapped[int | None] = mapped_column(
        Integer, ForeignKey("bre_plot.id", ondelete="CASCADE"), index=True, nullable=True, comment="小区(可空)", default=None
    )

    germplasm_id: Mapped[int | None] = mapped_column(
        Integer, ForeignKey("bre_germplasm.id", ondelete="CASCADE"), index=True, nullable=True, comment="种质资源(可空，描述性观测)", default=None
    )

    trait_id: Mapped[int | None] = mapped_column(
        Integer, ForeignKey("bre_trait.id", ondelete="CASCADE"), index=True, nullable=True, comment="性状(可空，EAV)", default=None
    )

    obs_date: Mapped[date | None] = mapped_column(Date, nullable=True, comment="观测日期", default=None)

    obs_year: Mapped[int | None] = mapped_column(Integer, nullable=True, comment="观测年份", default=None)

    obs_value: Mapped[str | None] = mapped_column(Text, nullable=True, comment="观测值(text多态，按obs_type解释)", default=None)

    obs_type: Mapped[str | None] = mapped_column(String(32), nullable=True, comment="观测类型(numeric/text/date)", default=None)

    trial_study_id: Mapped[int | None] = mapped_column(
        Integer, ForeignKey("bre_trial_study.id", ondelete="CASCADE"), index=True, nullable=True, comment="试验(可空)", default=None
    )

    operator_id: Mapped[int | None] = mapped_column(
        Integer, ForeignKey("bre_personnel.id", ondelete="CASCADE"), index=True, nullable=True, comment="观测人", default=None
    )

    remark: Mapped[str | None] = mapped_column(String(512), nullable=True, comment="备注", default=None)

    status: Mapped[int] = mapped_column(Integer, nullable=False, default=1, comment="状态(1正常/0停用)")

    __table_args__ = (
        Index("ix_bre_observation_created_deleted", "created_time", "is_deleted"),
    )