import json
from datetime import datetime
from pathlib import Path

from app.modules.project.domain.entities import Project
from app.modules.project.domain.repositories import ProjectRepository


class JsonProjectRepository(ProjectRepository):
    def __init__(self, path: Path) -> None:
        self._path = path

    def _load(self) -> list[dict]:
        if not self._path.exists():
            return []
        return json.loads(self._path.read_text(encoding="utf-8"))

    def _save(self, data: list[dict]) -> None:
        self._path.parent.mkdir(parents=True, exist_ok=True)
        self._path.write_text(json.dumps(data, ensure_ascii=False, indent=2), encoding="utf-8")

    @staticmethod
    def _to_dict(p: Project) -> dict:
        return {
            "id": p.id,
            "name": p.name,
            "design_dir": p.design_dir,
            "code_dir": p.code_dir,
            "created_at": p.created_at.isoformat(),
        }

    @staticmethod
    def _from_dict(d: dict) -> Project:
        return Project(
            id=d["id"],
            name=d["name"],
            design_dir=d["design_dir"],
            code_dir=d.get("code_dir"),
            created_at=datetime.fromisoformat(d["created_at"]),
        )

    def list_all(self) -> list[Project]:
        return [self._from_dict(d) for d in self._load()]

    def get_by_id(self, project_id: str) -> Project | None:
        for d in self._load():
            if d["id"] == project_id:
                return self._from_dict(d)
        return None

    def save(self, project: Project) -> None:
        data = self._load()
        data = [d for d in data if d["id"] != project.id]
        data.append(self._to_dict(project))
        self._save(data)

    def delete(self, project_id: str) -> None:
        data = [d for d in self._load() if d["id"] != project_id]
        self._save(data)