from typing import Any


from app.core.constants import ActorValue
from app.core.utils.time import utc_now
from app.modules.audit.constants import (
    AuditAction,
    AuditRiskLevel,
    AuditSource,
)
from app.modules.audit.schemas import AuditLogCreate
from app.modules.audit.service import AuditService
from app.modules.business.constants import (
    BusinessDomain,
    StatusValue,
)
from app.modules.business.models import (
    RiskEvent,
    RiskEventAction,
)
from app.modules.business.service import serialize_model
from app.modules.events.constants import (
    EventAggregateType,
    EventPayloadKey,
    EventSource,
    EventType,
)
from app.modules.events.services import EventService
from app.modules.risk.constants import (
    RiskEventActionKey,
    RiskEventActionValue,
    RiskErrorDetail,
)


class RiskActionMixin:
    def assign_event(
        self,
        risk_event_id: int,
        assigned_to: str,
        comment: str | None = None,
        actor: str = ActorValue.API,
    ) -> dict[str, Any]:
        record = self._get_event(risk_event_id)
        from_status = record.status
        record.assigned_to = assigned_to
        action = self._record_action(
            record,
            RiskEventActionValue.ASSIGN,
            actor,
            from_status,
            record.status,
            comment,
            {RiskEventActionKey.ASSIGNED_TO: assigned_to},
        )
        self.db.commit()
        self.db.refresh(record)
        self.db.refresh(action)
        return self._action_response(record, action)

    def comment_event(
        self,
        risk_event_id: int,
        comment: str,
        payload: dict[str, Any] | None = None,
        actor: str = ActorValue.API,
    ) -> dict[str, Any]:
        record = self._get_event(risk_event_id)
        action = self._record_action(
            record,
            RiskEventActionValue.COMMENT,
            actor,
            record.status,
            record.status,
            comment,
            payload or {},
        )
        self.db.commit()
        self.db.refresh(record)
        self.db.refresh(action)
        return self._action_response(record, action)

    def resolve_event(
        self,
        risk_event_id: int,
        comment: str | None = None,
        payload: dict[str, Any] | None = None,
        actor: str = ActorValue.API,
    ) -> dict[str, Any]:
        record = self._get_event(risk_event_id)
        from_status = record.status
        record.status = StatusValue.RESOLVED
        record.resolved_at = utc_now()
        action = self._record_action(
            record,
            RiskEventActionValue.RESOLVE,
            actor,
            from_status,
            record.status,
            comment,
            payload or {},
        )
        self.db.commit()
        self.db.refresh(record)
        self.db.refresh(action)
        return self._action_response(record, action)

    def close_event(
        self,
        risk_event_id: int,
        closed_reason: str,
        review_summary: str | None = None,
        actor: str = ActorValue.API,
    ) -> dict[str, Any]:
        record = self._get_event(risk_event_id)
        from_status = record.status
        now = utc_now()
        record.status = StatusValue.CLOSED
        record.closed_reason = closed_reason
        record.review_summary = review_summary
        record.closed_at = now
        if record.resolved_at is None:
            record.resolved_at = now
        action = self._record_action(
            record,
            RiskEventActionValue.CLOSE,
            actor,
            from_status,
            record.status,
            closed_reason,
            {RiskEventActionKey.REVIEW_SUMMARY: review_summary},
        )
        self.db.commit()
        self.db.refresh(record)
        self.db.refresh(action)
        return self._action_response(record, action)

    def reopen_event(
        self,
        risk_event_id: int,
        comment: str | None = None,
        actor: str = ActorValue.API,
    ) -> dict[str, Any]:
        record = self._get_event(risk_event_id)
        from_status = record.status
        record.status = StatusValue.OPEN
        record.resolved_at = None
        record.closed_at = None
        action = self._record_action(
            record,
            RiskEventActionValue.REOPEN,
            actor,
            from_status,
            record.status,
            comment,
            {},
        )
        self.db.commit()
        self.db.refresh(record)
        self.db.refresh(action)
        return self._action_response(record, action)

    def _get_event(self, risk_event_id: int) -> RiskEvent:
        record = self.db.get(RiskEvent, risk_event_id)
        if record is None:
            from fastapi import HTTPException, status

            raise HTTPException(
                status_code=status.HTTP_404_NOT_FOUND,
                detail=RiskErrorDetail.RISK_EVENT_NOT_FOUND,
            )
        return record

    def _record_action(
        self,
        record: RiskEvent,
        action: str,
        actor: str,
        from_status: str | None,
        to_status: str | None,
        comment: str | None,
        payload: dict[str, Any],
    ) -> RiskEventAction:
        action_record = RiskEventAction(
            code=f"RISK-ACTION-{utc_now():%Y%m%d%H%M%S%f}",
            risk_event_id=record.id,
            action=action,
            actor=actor,
            from_status=from_status,
            to_status=to_status,
            assigned_to=record.assigned_to,
            comment=comment,
            payload=payload,
        )
        self.db.add(action_record)
        AuditService(self.db).log(
            AuditLogCreate(
                actor=actor,
                source=AuditSource.RISK,
                action=AuditAction.RISK_EVENT_ACTION,
                target_type=BusinessDomain.RISK_EVENTS,
                target_id=str(record.id),
                risk_level=AuditRiskLevel.MEDIUM,
                request_payload={
                    RiskEventActionKey.ACTION: action,
                    RiskEventActionKey.FROM_STATUS: from_status,
                    RiskEventActionKey.TO_STATUS: to_status,
                    RiskEventActionKey.COMMENT: comment,
                    RiskEventActionKey.PAYLOAD: payload,
                },
            )
        )
        EventService(self.db).emit(
            event_type=EventType.RISK_ACTION_RECORDED,
            source=EventSource.RISK,
            aggregate_type=EventAggregateType.RISK_EVENT,
            aggregate_id=record.id,
            actor=actor,
            payload={
                EventPayloadKey.ACTION: action,
                EventPayloadKey.STATUS: to_status,
                EventPayloadKey.RECORD_ID: str(record.id),
                RiskEventActionKey.FROM_STATUS: from_status,
                RiskEventActionKey.TO_STATUS: to_status,
                RiskEventActionKey.COMMENT: comment,
                RiskEventActionKey.PAYLOAD: payload,
            },
            idempotency_key=f"risk:{record.id}:{action_record.code}",
            dispatch=True,
        )
        return action_record

    @staticmethod
    def _action_response(record: RiskEvent, action: RiskEventAction) -> dict[str, Any]:
        return {
            RiskEventActionKey.RISK_EVENT: serialize_model(record),
            RiskEventActionKey.ACTION_RECORD: serialize_model(action),
        }