"""Часть 07 DBML v5.18 «Консолидация»: консолидация ГК за период, версии, маршрут, блокировка, периметр, документы.

Производные консолидации (сводная ОСВ, пары ВГО, шахматка) НЕ хранятся (DECISION-5): считаются запросом из
`osv_entry` × `consolidation_member` × `elimination_rule`. Версия после VERIFIED — read-only (ТЗ 6.10).
Длинные имена FK на `consolidation_version` заданы явно (по конвенции R-9 > 63 символов PostgreSQL).
"""

import datetime
import uuid

from sqlalchemy import Boolean, Date, DateTime, ForeignKey, Index, Integer, SmallInteger, String, Text, text
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column

from .base import Base, UUIDPrimaryMixin
from .enums import (
    ConsolidationApproach,
    ConsolidationScenario,
    ConsolidationStatus,
    PeriodQuarter,
    pg_enum,
)


class Consolidation(UUIDPrimaryMixin, Base):
    """Логическая консолидация ГК за период (ТЗ 6.10); версии различаются периметром `consolidation_member`."""

    __tablename__ = "consolidation"
    __table_args__ = (Index("uq_consolidation_group_year_quarter", "company_group_id", "year", "quarter", unique=True),)

    company_group_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("company_group.id"), nullable=False
    )
    related_group_id: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("related_group.id"))
    year: Mapped[int] = mapped_column(SmallInteger, nullable=False)
    quarter: Mapped[PeriodQuarter] = mapped_column(pg_enum("period_quarter"), nullable=False)
    reporting_date: Mapped[datetime.date] = mapped_column(Date, nullable=False)
    created_at: Mapped[datetime.datetime | None] = mapped_column(DateTime(timezone=True))


class ConsolidationVersion(UUIDPrimaryMixin, Base):
    """Версия консолидации: сценарий, подход, статус, маршрут согласования, решение УОБ (ТЗ 5.1, 6.10)."""

    __tablename__ = "consolidation_version"
    __table_args__ = (
        Index("uq_consolidation_version_consolidation_id_version_no", "consolidation_id", "version_no", unique=True),
    )

    consolidation_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("consolidation.id"), nullable=False
    )
    version_no: Mapped[int] = mapped_column(Integer, nullable=False)
    status: Mapped[ConsolidationStatus] = mapped_column(pg_enum("consolidation_status"), nullable=False)
    scenario: Mapped[ConsolidationScenario] = mapped_column(pg_enum("consolidation_scenario"), nullable=False)
    approach: Mapped[ConsolidationApproach] = mapped_column(
        pg_enum("consolidation_approach"), nullable=False, server_default=text("'BASIC'")
    )
    goodwill_enabled: Mapped[bool] = mapped_column(Boolean, nullable=False, server_default=text("false"))
    initiator_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("app_user.id"), nullable=False)
    initiator_office_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("regional_office.id"), nullable=False
    )
    approved_in_rf_by: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("app_user.id"))
    approved_in_rf_at: Mapped[datetime.datetime | None] = mapped_column(DateTime(timezone=True))
    verified_in_go_by: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("app_user.id"))
    verified_in_go_at: Mapped[datetime.datetime | None] = mapped_column(DateTime(timezone=True))
    uob_decision_no: Mapped[str | None] = mapped_column(String)
    uob_decision_date: Mapped[datetime.date | None] = mapped_column(Date)
    methodology_deviations: Mapped[str | None] = mapped_column(Text)
    elimination_rules_version: Mapped[int | None] = mapped_column(Integer)
    is_in_work: Mapped[bool] = mapped_column(Boolean, nullable=False, server_default=text("true"))
    previous_version_id: Mapped[uuid.UUID | None] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("consolidation_version.id", name="fk_consolidation_version_previous_version_id"),
    )
    cancelled_reason: Mapped[str | None] = mapped_column(Text)
    created_at: Mapped[datetime.datetime | None] = mapped_column(DateTime(timezone=True))
    created_by: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("app_user.id"))
    updated_by: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("app_user.id"))
    updated_at: Mapped[datetime.datetime | None] = mapped_column(DateTime(timezone=True))


class ConsolidationStatusHistory(UUIDPrimaryMixin, Base):
    """Маршрут согласования: журнал смен статуса версии (ТЗ 6.10, 8.2)."""

    __tablename__ = "consolidation_status_history"

    version_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("consolidation_version.id", name="fk_consolidation_status_history_version_id"),
        nullable=False,
    )
    from_status: Mapped[ConsolidationStatus | None] = mapped_column(pg_enum("consolidation_status"))
    to_status: Mapped[ConsolidationStatus] = mapped_column(pg_enum("consolidation_status"), nullable=False)
    changed_by: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("app_user.id"), nullable=False)
    changed_at: Mapped[datetime.datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    comment: Mapped[str | None] = mapped_column(Text)


class ConsolidationLock(UUIDPrimaryMixin, Base):
    """Взятие версии в работу: ответственный сейчас = активная блокировка (`released_at IS NULL`)."""

    __tablename__ = "consolidation_lock"
    __table_args__ = (
        # не более одной активной блокировки на версию
        Index(
            "uq_consolidation_lock_version_active",
            "consolidation_version_id",
            unique=True,
            postgresql_where=text("released_at IS NULL"),
        ),
    )

    consolidation_version_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("consolidation_version.id", name="fk_consolidation_lock_consolidation_version_id"),
        nullable=False,
    )
    locked_by: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("app_user.id"), nullable=False)
    locked_at: Mapped[datetime.datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    released_at: Mapped[datetime.datetime | None] = mapped_column(DateTime(timezone=True))
    taken_over_from: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("app_user.id"))
    takeover_reason: Mapped[str | None] = mapped_column(Text)


class ConsolidationMember(UUIDPrimaryMixin, Base):
    """Зафиксированный периметр версии: изменение `related_group_member` существующие версии не меняет."""

    __tablename__ = "consolidation_member"
    __table_args__ = (
        Index("uq_consolidation_member_version_entity", "consolidation_version_id", "legal_entity_id", unique=True),
    )

    consolidation_version_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("consolidation_version.id", name="fk_consolidation_member_consolidation_version_id"),
        nullable=False,
    )
    legal_entity_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("legal_entity.id"), nullable=False
    )
    is_head_entity: Mapped[bool] = mapped_column(Boolean, nullable=False, server_default=text("false"))


class ConsolidationDocument(UUIDPrimaryMixin, Base):
    """Явная привязка логических документов к версии (Прил. 2 ТЗ); чек-лист = required_document_rule × периметр."""

    __tablename__ = "consolidation_document"
    __table_args__ = (
        Index("uq_consolidation_document_version_document", "consolidation_version_id", "document_id", unique=True),
    )

    consolidation_version_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("consolidation_version.id", name="fk_consolidation_document_consolidation_version_id"),
        nullable=False,
    )
    document_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("document.id"), nullable=False)