#!/usr/bin/env python3
"""
Secure Discord Environment Manager
Handles loading Discord configuration from .env without exposing secrets
"""

import os
import logging
from typing import Optional, Dict, Any
from dotenv import load_dotenv

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
)
logger = logging.getLogger(__name__)

class DiscordEnvManager:
    """Secure environment manager for Discord configuration"""

    def __init__(self, env_file: str = ".env"):
        self.env_file = env_file
        self._config = {}
        self._load_config()

    def _load_config(self):
        """Load configuration from .env file"""
        try:
            load_dotenv(self.env_file)
            self._config = {
                'DISCORD_BOT_TOKEN': os.getenv('DISCORD_BOT_TOKEN'),
                'DISCORD_SERVER_ID': os.getenv('DISCORD_SERVER_ID'),
                'DISCORD_APPLICATION_ID': os.getenv('DISCORD_APPLICATION_ID'),
                'DISCORD_PUBLIC_KEY': os.getenv('DISCORD_PUBLIC_KEY'),
                'SERVER_NAME': os.getenv('SERVER_NAME', 'RedFlag Security'),
                'ADMIN_ROLE_ID': os.getenv('ADMIN_ROLE_ID'),
                'GENERAL_CHANNEL_ID': os.getenv('GENERAL_CHANNEL_ID'),
                'ANNOUNCEMENTS_CHANNEL_ID': os.getenv('ANNOUNCEMENTS_CHANNEL_ID'),
                'SECURITY_ALERTS_CHANNEL_ID': os.getenv('SECURITY_ALERTS_CHANNEL_ID'),
                'DEV_CHAT_CHANNEL_ID': os.getenv('DEV_CHAT_CHANNEL_ID'),
                'BUG_REPORTS_CHANNEL_ID': os.getenv('BUG_REPORTS_CHANNEL_ID'),
                'COMMUNITY_CATEGORY_ID': os.getenv('COMMUNITY_CATEGORY_ID'),
                'DEVELOPMENT_CATEGORY_ID': os.getenv('DEVELOPMENT_CATEGORY_ID'),
                'SECURITY_CATEGORY_ID': os.getenv('SECURITY_CATEGORY_ID'),
            }

            # Validate required fields
            required_fields = ['DISCORD_BOT_TOKEN', 'DISCORD_SERVER_ID']
            missing = [field for field in required_fields if not self._config.get(field)]
            if missing:
                logger.error(f"Missing required environment variables: {missing}")
                raise ValueError(f"Missing required fields: {missing}")

            logger.info("✅ Discord configuration loaded successfully")

        except Exception as e:
            logger.error(f"Failed to load Discord configuration: {e}")
            raise

    def get(self, key: str, default: Any = None) -> Optional[str]:
        """Get configuration value"""
        return self._config.get(key, default)

    def get_required(self, key: str) -> str:
        """Get required configuration value"""
        value = self._config.get(key)
        if not value:
            raise ValueError(f"Required environment variable {key} is not set")
        return value

    def update_channel_ids(self, channel_name: str, channel_id: str):
        """Update channel ID in config"""
        channel_key = f"{channel_name.upper()}_CHANNEL_ID"
        self._config[channel_key] = channel_id

        # Also update in file
        self._update_env_file(channel_key, channel_id)

    def update_category_ids(self, category_name: str, category_id: str):
        """Update category ID in config"""
        category_key = f"{category_name.upper()}_CATEGORY_ID"
        self._config[category_key] = category_id

        # Also update in file
        self._update_env_file(category_key, category_id)

    def _update_env_file(self, key: str, value: str):
        """Update .env file with new value"""
        try:
            env_path = os.path.join(os.path.dirname(__file__), self.env_file)

            # Read current file
            if os.path.exists(env_path):
                with open(env_path, 'r') as f:
                    lines = f.readlines()
            else:
                lines = []

            # Update or add the line
            updated = False
            for i, line in enumerate(lines):
                if line.startswith(f"{key}="):
                    lines[i] = f"{key}={value}\n"
                    updated = True
                    break

            if not updated:
                lines.append(f"{key}={value}\n")

            # Write back to file
            with open(env_path, 'w') as f:
                f.writelines(lines)

            logger.info(f"✅ Updated {key} in {self.env_file}")

        except Exception as e:
            logger.error(f"Failed to update {key} in {self.env_file}: {e}")

    def is_configured(self) -> bool:
        """Check if the Discord bot is properly configured"""
        return (
            self.get('DISCORD_BOT_TOKEN') and
            self.get('DISCORD_SERVER_ID') and
            self.get('DISCORD_APPLICATION_ID')
        )

    def mask_sensitive_info(self, text: str) -> str:
        """Mask sensitive information in logs"""
        sensitive_words = ['TOKEN', 'KEY']
        masked_text = text

        for word in sensitive_words:
            if f"{word}_ID" not in masked_text:  # Don't mask channel IDs
                # Find and mask the value
                import re
                pattern = rf'{word}=\w+'
                replacement = f'{word}=***MASKED***'
                masked_text = re.sub(pattern, replacement, masked_text)

        return masked_text

# Global instance for easy access
discord_env = DiscordEnvManager()

# Convenience functions
def get_discord_config():
    """Get Discord configuration"""
    return discord_env

def is_discord_ready():
    """Check if Discord is ready for use"""
    return discord_env.is_configured()