"""
Strategy Infrastructure — Key Result Repository Implementation.
"""

from typing import List, Optional
from uuid import UUID

from ...domain.entities.key_result import KeyResult
from ...domain.repositories.interfaces import KeyResultRepository
from ..persistence.models import KeyResultModel
from .mappers import KeyResultMapper


class DjangoKeyResultRepository(KeyResultRepository):
    """پیاده‌سازی Django ریپازیتوری نتیجه کلیدی."""

    def find_by_id(self, key_result_id: UUID) -> Optional[KeyResult]:
        try:
            model = KeyResultModel.objects.get(id=key_result_id)
            return KeyResultMapper.to_entity(model)
        except KeyResultModel.DoesNotExist:
            return None

    def find_by_objective(self, objective_id: UUID) -> List[KeyResult]:
        qs = KeyResultModel.objects.filter(objective_id=objective_id)
        return [KeyResultMapper.to_entity(m) for m in qs]

    def save(self, entity: KeyResult) -> KeyResult:
        try:
            model = KeyResultModel.objects.get(id=entity.id)
            model = KeyResultMapper.to_model(entity, model)
        except KeyResultModel.DoesNotExist:
            model = KeyResultMapper.to_model(entity)
        model.save()
        return KeyResultMapper.to_entity(model)

    def delete(self, key_result_id: UUID) -> bool:
        deleted, _ = KeyResultModel.objects.filter(id=key_result_id).delete()
        return deleted > 0