app/config.py

"""
============================================
Application Configuration
All settings loaded from environment variables
============================================
"""

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


class Settings(BaseSettings):
    """
    Application settings.
    Values are loaded from environment variables or .env file.
    """

    # --- Database ---
    DATABASE_URL: str = Field(
        default="postgresql+asyncpg://user:pass@localhost:5432/novels",
        description="Async PostgreSQL connection string"
    )

    # --- Scraper Concurrency ---
    MAX_CONCURRENT_BROWSERS: int = Field(
        default=3,
        description="Maximum browser contexts running simultaneously"
    )

    # --- Human-like Delay Range (seconds) ---
    MIN_DELAY_SECONDS: float = Field(default=3.0)
    MAX_DELAY_SECONDS: float = Field(default=8.0)

    # --- Playwright Timeouts ---
    PAGE_TIMEOUT_SECONDS: int = Field(
        default=30,
        description="Max seconds to wait for page load"
    )
    CAPTCHA_CHECK_TIMEOUT: int = Field(
        default=10,
        description="Seconds to wait before assuming captcha"
    )

    # --- App Meta ---
    APP_TITLE: str = Field(default="Novel Scraper Pro")
    DEBUG: bool = Field(default=False)

    # --- Screenshots Path ---
    SCREENSHOTS_DIR: str = Field(
        default="app/static/screenshots"
    )

    class Config:
        env_file = ".env"
        env_file_encoding = "utf-8"
        case_sensitive = True


# --- Singleton instance ---
settings = Settings()


def get_database_url() -> str:
    """
    Ensure the DATABASE_URL uses the async driver.
    Render gives: postgresql://...
    We need: postgresql+asyncpg://...
    """
    url = settings.DATABASE_URL

    # Fix common Render URL format
    if url.startswith("postgres://"):
        url = url.replace("postgres://", "postgresql+asyncpg://", 1)
    elif url.startswith("postgresql://") and "+asyncpg" not in url:
        url = url.replace("postgresql://", "postgresql+asyncpg://", 1)

    return url