"""
Configuration module for WordPress SEO automation.
Loads and validates environment variables.
"""

import os
from dotenv import load_dotenv
from pathlib import Path

# Load environment variables from .env file
load_dotenv()

class Config:
    """Configuration class for WordPress SEO automation."""

    # WordPress Settings
    WORDPRESS_URL = os.getenv('WORDPRESS_URL', '').rstrip('/')
    WORDPRESS_USERNAME = os.getenv('WORDPRESS_USERNAME', '')
    WORDPRESS_APP_PASSWORD = os.getenv('WORDPRESS_APP_PASSWORD', '')

    # OpenRouter API Settings
    OPENROUTER_API_KEY = os.getenv('OPENROUTER_API_KEY', '')
    AI_MODEL = os.getenv('AI_MODEL', 'anthropic/claude-3.5-sonnet')

    # Script Settings
    BATCH_SIZE = int(os.getenv('BATCH_SIZE', '100'))
    API_DELAY_SECONDS = float(os.getenv('API_DELAY_SECONDS', '0.5'))

    # Analysis Settings
    ANALYSIS_MIN_POSITION = int(os.getenv('ANALYSIS_MIN_POSITION', '11'))
    ANALYSIS_MAX_POSITION = int(os.getenv('ANALYSIS_MAX_POSITION', '30'))
    ANALYSIS_MIN_IMPRESSIONS = int(os.getenv('ANALYSIS_MIN_IMPRESSIONS', '50'))
    ANALYSIS_TOP_N_POSTS = int(os.getenv('ANALYSIS_TOP_N_POSTS', '20'))

    # Output directory
    OUTPUT_DIR = Path(__file__).parent / 'output'

    @classmethod
    def validate(cls):
        """Validate that all required configuration is present."""
        errors = []

        if not cls.WORDPRESS_URL:
            errors.append("WORDPRESS_URL is required")

        if not cls.WORDPRESS_USERNAME:
            errors.append("WORDPRESS_USERNAME is required")

        if not cls.WORDPRESS_APP_PASSWORD:
            errors.append("WORDPRESS_APP_PASSWORD is required")

        if not cls.OPENROUTER_API_KEY:
            errors.append("OPENROUTER_API_KEY is required (get one from https://openrouter.ai/)")

        if errors:
            raise ValueError("Configuration errors:\n" + "\n".join(f"  - {e}" for e in errors))

        # Create output directory if it doesn't exist
        cls.OUTPUT_DIR.mkdir(exist_ok=True)

        return True

    @classmethod
    def get_wordpress_auth(cls):
        """Get WordPress authentication tuple."""
        return (cls.WORDPRESS_USERNAME, cls.WORDPRESS_APP_PASSWORD)

    @classmethod
    def get_api_base_url(cls):
        """Get WordPress REST API base URL."""
        return f"{cls.WORDPRESS_URL}/wp-json/wp/v2"