"""Configuration centralisée de Monitorink, chargée depuis l'environnement.

Toutes les valeurs sensibles (token Claude, token Home Assistant) viennent de variables
d'environnement / `.env` et ne sont jamais versionnées.
"""
from __future__ import annotations

import os
from dataclasses import dataclass, field

from dotenv import load_dotenv

load_dotenv()


def _get(name: str, default: str = "") -> str:
    return os.environ.get(name, default).strip()


def _get_list(name: str) -> list[str]:
    raw = _get(name)
    return [item.strip() for item in raw.split(",") if item.strip()]


@dataclass(frozen=True)
class HAEntity:
    """Une entité Home Assistant à afficher. Format env: `entity_id|Libellé|unité`."""

    entity_id: str
    label: str
    unit: str = ""

    @classmethod
    def parse(cls, spec: str) -> "HAEntity":
        parts = [p.strip() for p in spec.split("|")]
        entity_id = parts[0]
        label = parts[1] if len(parts) > 1 and parts[1] else entity_id
        unit = parts[2] if len(parts) > 2 else ""
        return cls(entity_id=entity_id, label=label, unit=unit)


@dataclass(frozen=True)
class Config:
    # --- Affichage ---
    timezone: str = field(default_factory=lambda: _get("MONITORINK_TZ", "Europe/Paris"))
    locale: str = field(default_factory=lambda: _get("MONITORINK_LOCALE", "fr_FR"))
    # Canevas de RENDU en paysage (1680x1264). Le PNG est ensuite pivoté de 90° dans
    # render.py pour le panneau e-ink physiquement en portrait (1264x1680).
    width: int = field(default_factory=lambda: int(_get("MONITORINK_WIDTH", "1680")))
    height: int = field(default_factory=lambda: int(_get("MONITORINK_HEIGHT", "1264")))
    # Sens de rotation pour l'affichage Kobo : "cw" (bouton à droite) ou "ccw".
    rotate: str = field(default_factory=lambda: _get("MONITORINK_ROTATE", "cw").lower())

    # --- Claude ---
    # Chemin du fichier .credentials.json d'un login Claude ISOLÉ dédié à Monitorink
    # (CLAUDE_CONFIG_DIR séparé). Le backend y lit/écrit (refresh) sans toucher le
    # ~/.claude partagé. L'endpoint /usage exige le scope user:profile -> login complet
    # requis (le token `claude setup-token` ne suffit pas, scope insuffisant).
    claude_creds_path: str = field(
        default_factory=lambda: _get("MONITORINK_CLAUDE_CREDS", "/creds/.credentials.json")
    )
    claude_ua: str = field(
        default_factory=lambda: _get("MONITORINK_CLAUDE_UA", "claude-code/2.1.172")
    )
    ccusage_enabled: bool = field(
        default_factory=lambda: _get("MONITORINK_CCUSAGE", "0") in ("1", "true", "yes")
    )

    # --- Météo (Open-Meteo, sans clé) ---
    weather_lat: float = field(default_factory=lambda: float(_get("MONITORINK_LAT", "48.8566")))
    weather_lon: float = field(default_factory=lambda: float(_get("MONITORINK_LON", "2.3522")))

    # --- Home Assistant ---
    ha_base_url: str = field(default_factory=lambda: _get("MONITORINK_HA_URL").rstrip("/"))
    ha_token: str = field(default_factory=lambda: _get("MONITORINK_HA_TOKEN"))

    # --- NAS (moniteur maison nas_monitor, endpoint /api/status) ---
    nas_url: str = field(default_factory=lambda: _get("MONITORINK_NAS_URL"))

    # --- Cache / rafraîchissement serveur ---
    cache_ttl_seconds: int = field(
        default_factory=lambda: int(_get("MONITORINK_CACHE_TTL", "120"))
    )

    @property
    def ha_entities(self) -> list[HAEntity]:
        return [HAEntity.parse(s) for s in _get_list("MONITORINK_HA_ENTITIES")]

    @property
    def ha_enabled(self) -> bool:
        return bool(self.ha_base_url and self.ha_token)


config = Config()