from datetime import date
from decimal import Decimal

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

from app.core.database import Base
from app.modules.business.constants import (
    StatusValue,
    VersionValue,
)
from app.modules.business.models.common import TimestampMixin


class Policy(Base, TimestampMixin):
    __tablename__ = "policies"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    title: Mapped[str] = mapped_column(String(255), index=True)
    policy_type: Mapped[str | None] = mapped_column(String(128), nullable=True)
    owner_department: Mapped[str | None] = mapped_column(String(128), nullable=True)
    version: Mapped[str] = mapped_column(String(32), default=VersionValue.V1_0)
    status: Mapped[str] = mapped_column(String(64), default=StatusValue.POLICY_DRAFT, index=True)
    effective_date: Mapped[date | None] = mapped_column(Date, nullable=True)
    feishu_doc_url: Mapped[str | None] = mapped_column(String(1024), nullable=True)
    summary: Mapped[str | None] = mapped_column(Text, nullable=True)

class Standard(Base, TimestampMixin):
    __tablename__ = "standards"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    title: Mapped[str] = mapped_column(String(255), index=True)
    standard_type: Mapped[str | None] = mapped_column(String(128), nullable=True)
    applies_to: Mapped[str | None] = mapped_column(String(255), nullable=True)
    status: Mapped[str] = mapped_column(String(64), default=StatusValue.VALID, index=True)
    check_items: Mapped[str | None] = mapped_column(Text, nullable=True)
    remediation: Mapped[str | None] = mapped_column(Text, nullable=True)
    policy_code: Mapped[str | None] = mapped_column(String(64), nullable=True, index=True)

class PerformanceMetric(Base, TimestampMixin):
    __tablename__ = "performance_metrics"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    code: Mapped[str] = mapped_column(String(64), unique=True, index=True)
    name: Mapped[str] = mapped_column(String(255), index=True)
    applies_to_role: Mapped[str | None] = mapped_column(String(128), nullable=True)
    formula: Mapped[str | None] = mapped_column(Text, nullable=True)
    weight: Mapped[Decimal] = mapped_column(Numeric(5, 2), default=0)
    data_source: Mapped[str | None] = mapped_column(String(255), nullable=True)
    auto_score: Mapped[Decimal] = mapped_column(Numeric(8, 2), default=0)
    confirmed_score: Mapped[Decimal | None] = mapped_column(Numeric(8, 2), nullable=True)
    status: Mapped[str] = mapped_column(String(64), default=StatusValue.DRAFT, index=True)