# -*- coding: utf-8 -*-
"""Client Home Assistant REST API (read-only)."""

import os
from typing import Any, Optional
from urllib.parse import urljoin

import httpx

PUBLIC_URL = os.environ.get("HA_URL", "https://ha.loogle.it").rstrip("/")
API_URL = os.environ.get("HA_API_URL", PUBLIC_URL).rstrip("/")
HA_TOKEN = os.environ.get("HA_TOKEN", "").strip()


def is_configured() -> bool:
    return bool(HA_TOKEN)


def _headers() -> dict:
    if not HA_TOKEN:
        raise RuntimeError(
            "HA_TOKEN non configurato in .env — crea un long-lived token in Home Assistant"
        )
    return {"Authorization": f"Bearer {HA_TOKEN}", "Content-Type": "application/json"}


def _request(method: str, path: str, *, params: Optional[dict] = None) -> Any:
    verify = os.environ.get("HA_VERIFY_SSL", "true").strip().lower() not in (
        "0", "false", "no", "off",
    )
    url = path if path.startswith("http") else urljoin(API_URL + "/", path.lstrip("/"))
    with httpx.Client(timeout=30.0, verify=verify) as client:
        resp = client.request(method, url, headers=_headers(), params=params)
        if resp.status_code >= 400:
            raise RuntimeError(f"Home Assistant {path}: HTTP {resp.status_code} {resp.text[:200]}")
        return resp.json()


def get_config() -> dict:
    return _request("GET", "/api/config")


def get_entity(entity_id: str) -> dict:
    return _request("GET", f"/api/states/{entity_id}")


def list_entities(domain: Optional[str] = None, limit: int = 100) -> list:
    states = _request("GET", "/api/states")
    if domain:
        prefix = domain if domain.endswith(".") else f"{domain}."
        states = [s for s in states if s.get("entity_id", "").startswith(prefix)]
    return states[:limit]


def search_entities(query: str, limit: int = 30) -> list:
    q = query.lower()
    matches = []
    for state in _request("GET", "/api/states"):
        eid = state.get("entity_id", "")
        name = (state.get("attributes") or {}).get("friendly_name", "")
        blob = f"{eid} {name}".lower()
        if q in blob:
            matches.append({
                "entity_id": eid,
                "state": state.get("state"),
                "friendly_name": name,
                "last_changed": state.get("last_changed"),
            })
        if len(matches) >= limit:
            break
    return matches