"""
GovBridge India — Centralized Configuration
All environment variables are declared here with Pydantic validation.
Usage: from config import settings
"""
from pydantic_settings import BaseSettings, SettingsConfigDict
from pydantic import Field
from typing import Optional


class Settings(BaseSettings):
    # ── Database ─────────────────────────────────────────
    SUPABASE_URL: str = Field(default="")
    SUPABASE_KEY: str = Field(default="")

    # ── LLM ──────────────────────────────────────────────
    GROQ_API_KEY: str = Field(default="")

    # ── Knowledge Extraction (Sprint 30 — INDRA Phase 1.5) ───
    GROQ_EXTRACTION_MODEL: str = Field(
        default="llama-3.3-70b-versatile",
        description="Groq model for Knowledge Triplet extraction"
    )
    GROQ_MAX_CONCURRENCY: int = Field(
        default=5,
        description="Max concurrent Groq API calls during extraction"
    )

    # ── Admin ────────────────────────────────────────────
    ADMIN_SECRET: str = Field(default="change-this-in-production")

    # ── Translation (Bhashini) ───────────────────────────
    BHASHINI_USER_ID: Optional[str] = Field(default=None)
    BHASHINI_API_KEY: Optional[str] = Field(default=None)

    # ── WhatsApp ─────────────────────────────────────────
    WHATSAPP_TOKEN: Optional[str] = Field(default=None)
    WHATSAPP_PHONE_NUMBER_ID: Optional[str] = Field(default=None)
    WHATSAPP_VERIFY_TOKEN: Optional[str] = Field(default=None)
    WHATSAPP_APP_SECRET: Optional[str] = Field(default=None)

    # ── Feature Flags ────────────────────────────────────
    ENVIRONMENT: str = Field(default="development")

    # ── Migration Flag ───────────────────────────────────
    # Set to "true" during the expand-contract migration window.
    # When true, ingest writes to BOTH embedding AND embedding_v2.
    # After migration 009 is complete, set back to "false".
    DUAL_WRITE_EMBEDDINGS: str = Field(default="false")

    model_config = SettingsConfigDict(
        env_file=(".env", "../.env"),
        env_file_encoding="utf-8",
        extra="ignore"
    )


settings = Settings()