app/config.py

import os
from typing import List, Optional
from pydantic_settings import BaseSettings
from pydantic import Field


class Settings(BaseSettings):
    # Application
    app_name: str = Field(default="ChatCal.ai", env="APP_NAME")
    app_env: str = Field(default="development", env="APP_ENV")
    app_host: str = Field(default="0.0.0.0", env="APP_HOST")
    app_port: int = Field(default=8000, env="APP_PORT")
    
    # Groq API (primary)
    groq_api_key: str = Field(..., env="GROQ_API_KEY")
    
    # Anthropic (optional - fallback)
    anthropic_api_key: Optional[str] = Field(None, env="ANTHROPIC_API_KEY")
    
    # Gemini API (optional - fallback)
    gemini_api_key: Optional[str] = Field(None, env="GEMINI_API_KEY")
    
    # Google Calendar
    google_calendar_id: str = Field(default="pgits.job@gmail.com", env="GOOGLE_CALENDAR_ID")
    google_client_id: Optional[str] = Field(None, env="GOOGLE_CLIENT_ID")
    google_client_secret: Optional[str] = Field(None, env="GOOGLE_CLIENT_SECRET")
    google_credentials_path: str = Field(default="credentials/google_calendar_credentials.json", env="GOOGLE_CREDENTIALS_PATH")

    # OAuth Token Storage (for local development)
    google_access_token: Optional[str] = Field(None, env="GOOGLE_ACCESS_TOKEN")
    google_refresh_token: Optional[str] = Field(None, env="GOOGLE_REFRESH_TOKEN")
    google_token_expiry: Optional[str] = Field(None, env="GOOGLE_TOKEN_EXPIRY")
    
    # Redis
    redis_url: str = Field(default="redis://localhost:6379/0", env="REDIS_URL")

    # Session Backend (redis or jwt)
    session_backend: str = Field(default="redis", env="SESSION_BACKEND")
    
    # Security
    secret_key: str = Field(..., env="SECRET_KEY")
    cors_origins: List[str] = Field(default=["http://localhost:3000", "http://localhost:8000"], env="CORS_ORIGINS")
    
    # Timezone
    default_timezone: str = Field(default="America/New_York", env="DEFAULT_TIMEZONE")
    
    # Chat Settings
    max_conversation_history: int = Field(default=20, env="MAX_CONVERSATION_HISTORY")
    session_timeout_minutes: int = Field(default=10, env="SESSION_TIMEOUT_MINUTES")  # 10 minutes max
    
    # HuggingFace Settings
    tokenizers_parallelism: Optional[str] = Field(default="false", env="TOKENIZERS_PARALLELISM")
    
    # Peter's Contact Information
    my_phone_number: str = Field(..., env="MY_PHONE_NUMBER")
    my_email_address: str = Field(..., env="MY_EMAIL_ADDRESS")
    
    # Email Service Configuration
    smtp_server: str = Field(default="smtp.gmail.com", env="SMTP_SERVER")
    smtp_port: int = Field(default=587, env="SMTP_PORT")
    smtp_username: Optional[str] = Field(None, env="SMTP_USERNAME")
    smtp_password: Optional[str] = Field(None, env="SMTP_PASSWORD")
    email_from_name: str = Field(default="ChatCal.ai", env="EMAIL_FROM_NAME")
    
    # Testing Configuration
    testing_mode: bool = Field(default=True, env="TESTING_MODE")  # Set to True to ignore Peter's email validation
    
    # Default Appointment Settings
    default_appointment_title: str = Field(default="VoiceCal Appt", env="DEFAULT_APPOINTMENT_TITLE")
    
    # STT Service Settings (Direct Connection)
    stt_service_wss_url: str = Field(default="wss://pgits-stt-gpu-service-v3.hf.space/ws", env="STT_SERVICE_WSS_URL")
    stt_websocket_timeout: int = Field(default=30, env="STT_WEBSOCKET_TIMEOUT")
    stt_audio_chunk_size: int = Field(default=1280, env="STT_AUDIO_CHUNK_SIZE")  # 80ms at 16kHz
    stt_sample_rate: int = Field(default=16000, env="STT_SAMPLE_RATE")  # v3 service native rate
    
    # STT UI Settings
    stt_listening_indicator: bool = Field(default=True, env="STT_LISTENING_INDICATOR")
    stt_auto_submit: bool = Field(default=False, env="STT_AUTO_SUBMIT")  # Future feature
    stt_silence_threshold: float = Field(default=2.5, env="STT_SILENCE_THRESHOLD")  # seconds
    
    class Config:
        env_file = ".env"
        env_file_encoding = "utf-8"
        case_sensitive = False
        extra = "ignore"  # Allow extra environment variables


settings = Settings()