"""WESP-compatible model aliases with enterprise_id context for ported lab code."""

from __future__ import annotations

import uuid
from contextlib import contextmanager
from contextvars import ContextVar, Token
from datetime import UTC, datetime
from typing import Any, Generic, Iterator, TypeVar

from sqlalchemy import delete, func, select

from app.modules.zootech.lab_models import (
    ZootechLabAnimalProfile,
    ZootechLabComponentNutrientValue,
    ZootechLabProfileNorm,
    ZootechLabRacionNormyInfo,
    ZootechLabRacionNormyMoskwa,
    ZootechLabRacionNormyMoskwaMeta,
    ZootechLabRacionNormyPiter,
    ZootechLabRacionNormyPiterMeta,
    ZootechLabRationCalcIndicator,
    ZootechLabRationCalcTotal,
    ZootechLabRationCompoundLine,
    ZootechLabRationLine,
    ZootechLabRecipeRation,
)
from app.modules.zootech.models import ZootechComponent, ZootechIngredient, ZootechRecipe
from app.modules.zootech.wesp_bridge_db import db

_enterprise_id: ContextVar[str | None] = ContextVar("wesp_enterprise_id", default=None)

WESP_SUPPRESS_SYNC_ENQUEUE = "wesp_suppress_sync_enqueue"

M = TypeVar("M")


def default_uuid() -> str:
    return str(uuid.uuid4())


class TimestampMixin:
    """Legacy mixin marker for ported lab model modules."""


class SoftDeleteMixin:
    """Legacy mixin marker; soft_delete lives on Zootech lab rows."""

    def soft_delete(self, deleted_by_user: str = "system", **_: Any) -> None:
        if getattr(self, "is_deleted", False):
            return
        self.is_deleted = True
        if hasattr(self, "deleted_at"):
            self.deleted_at = datetime.now(UTC)
        if hasattr(self, "deleted_by"):
            self.deleted_by = deleted_by_user


def get_enterprise_id() -> str:
    ent = _enterprise_id.get()
    if not ent:
        raise RuntimeError("wesp_bridge_models: enterprise_id not set — use wesp_enterprise()")
    return ent


def set_enterprise_id(enterprise_id: str) -> Token:
    return _enterprise_id.set(enterprise_id)


def reset_enterprise_id(token: Token) -> None:
    _enterprise_id.reset(token)


@contextmanager
def wesp_enterprise(enterprise_id: str) -> Iterator[None]:
    token = set_enterprise_id(enterprise_id)
    try:
        yield
    finally:
        reset_enterprise_id(token)


def _model_has_enterprise(model: type) -> bool:
    return hasattr(model, "enterprise_id")


class _BridgeQuery(Generic[M]):
    __slots__ = ("_model", "_stmt")

    def __init__(self, model: type[M], stmt=None) -> None:
        self._model = model
        self._stmt = stmt

    def _base(self):
        if self._stmt is not None:
            return self._stmt
        stmt = select(self._model)
        if _model_has_enterprise(self._model):
            stmt = stmt.where(self._model.enterprise_id == get_enterprise_id())  # type: ignore[attr-defined]
        return stmt

    def filter(self, *criteria) -> _BridgeQuery[M]:
        stmt = self._base()
        for crit in criteria:
            stmt = stmt.where(crit)
        return _BridgeQuery(self._model, stmt)

    def filter_by(self, **kwargs: Any) -> _BridgeQuery[M]:
        stmt = self._base()
        for key, value in kwargs.items():
            stmt = stmt.where(getattr(self._model, key) == value)
        return _BridgeQuery(self._model, stmt)

    def order_by(self, *clauses) -> _BridgeQuery[M]:
        base = self._stmt if self._stmt is not None else self._base()
        return _BridgeQuery(self._model, base.order_by(*clauses))

    def all(self) -> list[M]:
        return list(db.session.scalars(self._base()).all())

    def first(self) -> M | None:
        return db.session.scalar(self._base().limit(1))

    def one_or_none(self) -> M | None:
        return self.first()

    def get(self, ident: str) -> M | None:
        if not hasattr(self._model, "id"):
            return None
        stmt = select(self._model).where(self._model.id == ident)  # type: ignore[attr-defined]
        if _model_has_enterprise(self._model):
            stmt = stmt.where(self._model.enterprise_id == get_enterprise_id())  # type: ignore[attr-defined]
        return db.session.scalar(stmt)

    def count(self) -> int:
        subq = self._base().subquery()
        return int(db.session.scalar(select(func.count()).select_from(subq)) or 0)

    def delete(self, synchronize_session: bool = False) -> int:
        del synchronize_session
        rows = self.all()
        for row in rows:
            db.session.delete(row)
        return len(rows)


def _strip_legacy_kwargs(kwargs: dict[str, Any], model: type) -> dict[str, Any]:
    out = dict(kwargs)
    for key in ("sync_timestamp", "sync_status"):
        out.pop(key, None)
    if model in (ZootechRecipe, ZootechComponent, ZootechIngredient):
        out.pop("created_by", None)
        out.pop("updated_by", None)
    return out


def _enable_bridge(model: type[M]) -> type[M]:
    model.query = _BridgeQuery(model)  # type: ignore[attr-defined]
    if not _model_has_enterprise(model):
        return model

    original_init = model.__init__

    def _patched_init(self, **kwargs: Any) -> None:
        kwargs = _strip_legacy_kwargs(kwargs, model)
        if "enterprise_id" not in kwargs:
            kwargs["enterprise_id"] = get_enterprise_id()
        original_init(self, **kwargs)

    model.__init__ = _patched_init  # type: ignore[method-assign]
    return model


Recipe = _enable_bridge(ZootechRecipe)
Component = _enable_bridge(ZootechComponent)
Ingredient = _enable_bridge(ZootechIngredient)

LabAnimalProfile = _enable_bridge(ZootechLabAnimalProfile)
LabProfileNorm = _enable_bridge(ZootechLabProfileNorm)
LabComponentNutrientValue = _enable_bridge(ZootechLabComponentNutrientValue)
LabRecipeRation = _enable_bridge(ZootechLabRecipeRation)
LabRationLine = _enable_bridge(ZootechLabRationLine)
LabRationCalcTotal = _enable_bridge(ZootechLabRationCalcTotal)
LabRationCalcIndicator = _enable_bridge(ZootechLabRationCalcIndicator)
LabRationCompoundLine = _enable_bridge(ZootechLabRationCompoundLine)

LabRacionNormyMoskwa = _enable_bridge(ZootechLabRacionNormyMoskwa)
LabRacionNormyMoskwaMeta = _enable_bridge(ZootechLabRacionNormyMoskwaMeta)
LabRacionNormyPiter = _enable_bridge(ZootechLabRacionNormyPiter)
LabRacionNormyPiterMeta = _enable_bridge(ZootechLabRacionNormyPiterMeta)
LabRacionNormyInfo = _enable_bridge(ZootechLabRacionNormyInfo)


def _enqueue_recipe_children_sync(recipe_id: str) -> None:
    del recipe_id


__all__ = [
    "Recipe",
    "Component",
    "Ingredient",
    "LabAnimalProfile",
    "LabProfileNorm",
    "LabComponentNutrientValue",
    "LabRecipeRation",
    "LabRationLine",
    "LabRationCalcTotal",
    "LabRationCalcIndicator",
    "LabRationCompoundLine",
    "LabRacionNormyMoskwa",
    "LabRacionNormyMoskwaMeta",
    "LabRacionNormyPiter",
    "LabRacionNormyPiterMeta",
    "LabRacionNormyInfo",
    "default_uuid",
    "TimestampMixin",
    "SoftDeleteMixin",
    "WESP_SUPPRESS_SYNC_ENQUEUE",
    "get_enterprise_id",
    "set_enterprise_id",
    "wesp_enterprise",
    "_enqueue_recipe_children_sync",
]