"""Environment-backed Fiscal Hub configuration."""

from dataclasses import dataclass
import os
from urllib.parse import quote


def _database_url() -> str:
    configured = os.getenv("DATABASE_URL")
    if configured:
        return configured
    password = quote(os.getenv("POSTGRES_PASSWORD", "gti"), safe="")
    return f"postgresql+psycopg://gti:{password}@postgres:5432/gti_fiscal"


@dataclass(frozen=True)
class Settings:
    database_url: str = _database_url()
    hub_port: int = int(os.getenv("HUB_PORT", "8000"))
    # AGENT_DEV_TOKEN auto-bootstraps an agent from a fixed dev token on every request.
    # Leave unset in any environment other than local development — production Agents
    # must be created via scripts/register_agent.py, whose token is never derived from
    # this setting.
    agent_dev_token: str = os.getenv("AGENT_DEV_TOKEN", "")
    environment: str = os.getenv("APP_ENV", "development")
    log_level: str = os.getenv("LOG_LEVEL", "INFO")
    base_url: str = os.getenv("BASE_URL", "http://localhost:8000")
    # An Agent is considered ONLINE if a heartbeat arrived within this many seconds.
    agent_online_threshold_seconds: int = int(os.getenv("AGENT_ONLINE_THRESHOLD_SECONDS", "120"))
    agent_heartbeat_interval_seconds: int = int(os.getenv("AGENT_HEARTBEAT_INTERVAL_SECONDS", "40"))
    agent_offline_after_seconds: int = int(os.getenv("AGENT_OFFLINE_AFTER_SECONDS", "0"))
    agent_server_version: str = os.getenv("CURRENT_SERVER_VERSION", "1.0.0rc1")
    agent_event_retention_days: int = int(os.getenv("AGENT_EVENT_RETENTION_DAYS", "90"))
    web_session_seconds: int = int(os.getenv("WEB_SESSION_SECONDS", "28800"))
    web_cookie_secure: bool = os.getenv("WEB_COOKIE_SECURE", "0") == "1"
    web_cookie_name: str = os.getenv("WEB_COOKIE_NAME", "gti_admin_session")
    web_max_event_message: int = int(os.getenv("WEB_MAX_EVENT_MESSAGE", "2000"))
    web_max_event_context_bytes: int = int(os.getenv("WEB_MAX_EVENT_CONTEXT_BYTES", "12000"))
    ui_timezone: str = os.getenv("UI_TIMEZONE", "America/Bahia")
    allow_weak_dev_password: bool = os.getenv("ALLOW_WEAK_DEV_PASSWORD", "0") == "1"
    ncm_dataset_url: str = os.getenv("NCM_DATASET_URL", "https://portalunico.siscomex.gov.br/classif/api/publico/nomenclatura/download/json")
    cest_dataset_url: str = os.getenv("CEST_DATASET_URL", "https://www.confaz.fazenda.gov.br/legislacao/convenios/2018/CV142_18")
    dataset_storage_path: str = os.getenv("DATASET_STORAGE_PATH", "./data/datasets")
    http_timeout_seconds: float = float(os.getenv("HTTP_TIMEOUT_SECONDS", "30"))
    # ---- AI semantic layer V1 ----
    # Credentials live ONLY in the Hub environment; the Windows Agent never sees them.
    ai_enabled: bool = os.getenv("AI_ENABLED", "0") == "1"
    ai_provider: str = os.getenv("AI_PROVIDER", "baseline")     # baseline | openai | ... (AISemanticProvider)
    ai_model: str = os.getenv("AI_MODEL", "baseline-deterministic-v1")
    ai_max_batch_size: int = int(os.getenv("AI_MAX_BATCH_SIZE", "20"))
    ai_max_run_cost_usd: float = float(os.getenv("AI_MAX_RUN_COST_USD", "5.0"))
    ai_min_confidence: float = float(os.getenv("AI_MIN_CONFIDENCE", "0.6"))
    ai_price_in_per_m: float | None = float(os.getenv("AI_PRICE_IN_PER_M")) if os.getenv("AI_PRICE_IN_PER_M") else None
    ai_price_out_per_m: float | None = float(os.getenv("AI_PRICE_OUT_PER_M")) if os.getenv("AI_PRICE_OUT_PER_M") else None
    # Real-LLM evaluation (OpenAI-compatible). The key lives ONLY in this environment.
    # Z.ai general endpoint (NOT the /api/coding/paas/v4 coding-plan endpoint).
    ai_api_key: str = os.getenv("AI_API_KEY", "")
    ai_base_url: str = os.getenv("AI_BASE_URL", "https://api.z.ai/api/paas/v4")


settings = Settings()