from __future__ import annotations

import json
from typing import Any
from urllib import error, parse, request

from app.config import settings


class KitchenOwlService:
    def __init__(self) -> None:
        self.base_url = settings.kitchenowl_base_url.rstrip("/")
        self.token = settings.kitchenowl_api_token
        self.household_id = settings.kitchenowl_household_id

    def configured(self) -> bool:
        return bool(self.base_url and self.token and self.household_id)

    def _request(self, method: str, path: str, *, params: dict[str, Any] | None = None, body: dict[str, Any] | None = None, timeout: int = 30):
        url = f"{self.base_url}{path}"
        if params:
            url += ("&" if "?" in url else "?") + parse.urlencode(params, doseq=True)
        data = None
        headers = {
            "Authorization": f"Bearer {self.token}",
            "Accept": "application/json",
            "User-Agent": "doris-kitchen/1.0",
        }
        if body is not None:
            data = json.dumps(body).encode("utf-8")
            headers["Content-Type"] = "application/json"
        req = request.Request(url, data=data, headers=headers, method=method.upper())
        try:
            with request.urlopen(req, timeout=timeout) as resp:
                raw = resp.read().decode("utf-8", "replace")
                content_type = resp.headers.get("Content-Type", "")
                parsed = json.loads(raw) if "json" in content_type and raw else raw
                return resp.status, parsed
        except error.HTTPError as exc:
            raw = exc.read().decode("utf-8", "replace")
            try:
                parsed = json.loads(raw)
            except Exception:
                parsed = raw
            return exc.code, parsed

    def list_recipes(self) -> list[dict[str, Any]]:
        if not self.configured():
            return []
        status, payload = self._request("GET", f"/api/household/{self.household_id}/recipe")
        if status == 200 and isinstance(payload, list):
            return payload
        return []

    def find_existing(self, payload: dict[str, Any]) -> dict[str, Any] | None:
        want_source = str(payload.get("source") or "").strip().lower()
        want_name = str(payload.get("name") or "").strip().lower()
        for recipe in self.list_recipes():
            source = str(recipe.get("source") or "").strip().lower()
            name = str(recipe.get("name") or "").strip().lower()
            if want_source and source and source == want_source:
                return recipe
            if want_name and name == want_name:
                return recipe
        return None

    def create_recipe(self, payload: dict[str, Any]) -> dict[str, Any]:
        if not self.configured():
            raise RuntimeError("KitchenOwl credentials are not configured.")
        existing = self.find_existing(payload)
        if existing:
            return {"status": "duplicate", "recipe": existing}
        status, created = self._request("POST", f"/api/household/{self.household_id}/recipe", body=payload, timeout=45)
        return {"status": "created" if status == 200 else "error", "http_status": status, "recipe": created}


kitchenowl = KitchenOwlService()