from datetime import UTC, datetime
from itertools import count

from app.modules.projects.schemas import ProjectCreate, ProjectRead


class ProjectService:
    def __init__(self) -> None:
        self._ids = count(1)
        self._projects: list[ProjectRead] = []

    def list(self) -> list[ProjectRead]:
        return self._projects.copy()

    def create(self, payload: ProjectCreate) -> ProjectRead:
        project = ProjectRead(
            id=next(self._ids),
            created_at=datetime.now(UTC),
            **payload.model_dump(),
        )
        self._projects.append(project)
        return project

    def get(self, project_id: int) -> ProjectRead | None:
        return next(
            (project for project in self._projects if project.id == project_id),
            None,
        )


project_service = ProjectService()