from __future__ import annotations

from datetime import datetime
from typing import Any

from .exceptions import ProjectNotOpenError
from .utils import safe_count, safe_text


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

    @property
    def is_open(self) -> bool:
        try:
            _ = self._pcpy.SWMM
            return True
        except Exception:
            return False

    def require_open(self):
        if not self.is_open:
            raise ProjectNotOpenError(
                "No active PCSWMM/SWMM5 project is open."
            )

    @property
    def swmm(self):
        self.require_open()
        return self._pcpy.SWMM

    def summary(self) -> dict[str, Any]:
        self.require_open()
        swmm = self.swmm

        collection_names = {
            "scenario_count": "Scenarios",
            "node_count": "Nodes",
            "link_count": "Links",
            "junction_count": "Junctions",
            "conduit_count": "Conduits",
            "subcatchment_count": "Subcatchments",
            "storage_count": "Storages",
            "outfall_count": "Outfalls",
        }

        result = {
            "captured_at": datetime.now().isoformat(timespec="seconds"),
            "project_open": True,
            "project_name": safe_text(swmm.ProjectName),
            "project_folder": safe_text(swmm.ProjectFolder),
            "model_file": safe_text(swmm.FilePath),
            "swmm_version": safe_text(swmm.Version),
            "run_status": safe_text(swmm.RunStatus),
        }

        for output_name, attribute_name in collection_names.items():
            try:
                result[output_name] = safe_count(getattr(swmm, attribute_name))
            except Exception:
                result[output_name] = None

        try:
            result["graph_file_count"] = safe_count(self._pcpy.Graph.Files)
        except Exception:
            result["graph_file_count"] = 0

        return result

    def open_project(self, path: str):
        self._pcpy.open_project(path)
        return self.summary()