from pydantic_settings import BaseSettings, SettingsConfigDict
from pydantic import Field
from typing import Optional

# Accept-Encoding para TODA petición aiohttp del proyecto. Nunca anunciar "br":
# el descompresor incremental de aiohttp 3.14 está roto, y con un backend brotli
# instalado aiohttp lo anunciaría POR DEFECTO en cualquier sesión sin
# Accept-Encoding explícito (incidente 2026-07-04, ver KNOWN-ISSUES.md).
# Toda sesión/petición nueva debe usar esta constante, no un literal.
SAFE_ACCEPT_ENCODING = "gzip, deflate"


class Settings(BaseSettings):
    # Telegram
    telegram_bot_token: str = Field(...)
    telegram_allowed_users: str = Field("")  # comma-separated user IDs

    # Ollama
    ollama_url: str = Field("http://ollama.chemavx.xyz")
    ollama_model: str = Field("qwen2.5:3b")
    ollama_embed_model: str = Field("qwen2.5:3b")

    # Claude fallback (optional)
    anthropic_api_key: Optional[str] = Field(None)
    claude_model: str = Field("claude-haiku-4-5")

    # Database
    db_path: str = Field("/data/researchowl.db")

    # Scraping
    max_depth: int = Field(3)                      # recursion depth
    max_sources: int = Field(150)                # hard cap
    max_pages_per_search: int = Field(5)
    searxng_url: str = Field(
        "http://searxng-svc.researchowl.svc.cluster.local:8080/search",
    )
    # Motores que el scraper pide a SearXNG (todos vienen configurados por los
    # defaults de la instancia, use_default_settings: true). Verificados en vivo
    # 2026-07-03: la lista ampliada duplica resultados y dominios únicos (~2x)
    # por ~+2s/query, y da redundancia cuando brave/DDG caen en rate limit o
    # CAPTCHA. Excluidos: qwant (access denied), yahoo (roto), wikidata (0
    # resultados en queries de texto), wayback machine (duplica contenido vivo).
    searxng_engines: str = Field(
        "duckduckgo,google,bing,brave,startpage,mojeek,presearch,"
        "google news,bing news,internet archive scholar"
    )
    request_timeout: int = Field(30)
    request_delay: float = Field(1.0)          # seconds between requests
    min_content_length: int = Field(200)  # chars
    # Libros/dumps enteros (100k+ palabras) inflan RAM y DB sin aportar al RAG
    max_content_length: int = Field(300_000)  # chars

    # Fuentes opcionales — desactivadas por defecto: la IP del homelab está
    # bloqueada por Reddit (403) y YouTube (transcripts vacíos), eran peso muerto.
    enable_youtube: bool = Field(False)
    enable_reddit: bool = Field(False)
    # Bing News RSS como semilla de actualidad — off hasta activarlo a propósito
    enable_news_seed: bool = Field(False)

    # Processing
    chunk_size: int = Field(800)                  # tokens per chunk
    chunk_overlap: int = Field(100)
    quality_threshold: float = Field(0.3)  # 0-1, chunks below discarded

    # Ghost CMS
    ghost_url: Optional[str] = Field(None)
    ghost_api_key: Optional[str] = Field(None)
    ghost_url_en: str = Field("")
    ghost_api_key_en: str = Field("")

    # SEO autofill — "off" | "on" | "dryrun" (default off).
    #   off    = today's exact behavior (bare draft, no second LLM call).
    #   on     = adds best-effort meta/OG/Twitter/tags/internal-links to the DRAFT
    #            (status stays "draft" — NEVER auto-publishes; see src/seo/autofill.py).
    #   dryrun = runs the full pipeline + reports the proposed SEO to Telegram, but
    #            writes a BARE draft (no seo fields), for inspection before trusting
    #            the write path. A `/generate blog en dry` arg forces dryrun per-call.
    seo_autofill: str = Field("off")

    # News monitor (RSS de noticias UAP/OVNI) — inerte hasta NEWS_ENABLED=true.
    NEWS_ENABLED: bool = Field(False)
    NEWS_POLL_INTERVAL_HOURS: int = Field(6)
    # Chat al que el monitor empuja novedades; si None -> 1er TELEGRAM_ALLOWED_USERS
    # (ver propiedad news_chat_id).
    NEWS_CHAT_ID: Optional[int] = Field(None)
    NEWS_KEYWORDS: str = Field(
        "ovni,ovnis,uap,ufo,desclasificado,desclasificacion,declassified,"
        "avistamiento,sighting,extraterrestre,non-human,nhi,grusch,"
        "aaro,pursue,fenomeno aereo,whistleblower",
    )
    NEWS_MAX_ITEMS: int = Field(15)

    # Alerts
    cost_alert_threshold: float = Field(0.15)

    # App
    log_level: str = Field("INFO")
    timezone: str = Field("Europe/Madrid")

    @property
    def allowed_user_ids(self) -> list[int]:
        if not self.telegram_allowed_users:
            return []
        return [int(uid.strip()) for uid in self.telegram_allowed_users.split(",") if uid.strip()]

    @property
    def news_chat_id(self) -> Optional[int]:
        """Chat destino del monitor de noticias: NEWS_CHAT_ID explícito o, si no
        está definido, el primer TELEGRAM_ALLOWED_USERS."""
        if self.NEWS_CHAT_ID is not None:
            return self.NEWS_CHAT_ID
        ids = self.allowed_user_ids
        return ids[0] if ids else None

    @property
    def seo_autofill_enabled(self) -> bool:
        """True when autofill should run (either live 'on' or 'dryrun')."""
        return (self.seo_autofill or "").strip().lower() in ("on", "true", "1", "yes", "dryrun")

    @property
    def seo_autofill_dryrun(self) -> bool:
        return (self.seo_autofill or "").strip().lower() == "dryrun"

    model_config = SettingsConfigDict(env_file=".env")


settings = Settings()