from __future__ import annotations

from datetime import datetime
from typing import Any

from .project import ProjectService
from .utils import safe_count, safe_text


class SimulationService:
    def __init__(self, pcpy: Any, project: ProjectService):
        self._pcpy = pcpy
        self._project = project

    def run(self) -> dict[str, Any]:
        self._project.require_open()

        started = datetime.now()
        self._pcpy.SWMM.run()
        finished = datetime.now()

        try:
            graph_file_count = safe_count(self._pcpy.Graph.Files)
        except Exception:
            graph_file_count = 0

        return {
            "status": "completed",
            "started_at": started.isoformat(timespec="seconds"),
            "finished_at": finished.isoformat(timespec="seconds"),
            "elapsed_seconds": round((finished - started).total_seconds(), 3),
            "run_status": safe_text(self._pcpy.SWMM.RunStatus),
            "graph_file_count": graph_file_count,
        }

    def refresh_output(self):
        self._project.require_open()
        self._pcpy.SWMM.refresh_output()