import json

"""
Utility functions for chat customization.
"""
from flask import current_app


def get_default_chat_customisation(tenant_customisation=None):
    """
    Get chat customization options with default values for missing options.

    Args:
        tenant_customisation (dict or str, optional): The tenant's customization options.
            Defaults to None. Can be a dict or a JSON string.

    Returns:
        dict: A dictionary containing all customization options with default values
            for any missing options.
    """
    # Default customization options
    default_customisation = {
        'primary_color': '#007bff',
        'secondary_color': '#6c757d',
        'background_color': '#ffffff',
        'text_color': '#212529',
        'sidebar_color': '#f8f9fa',
        'sidebar_background': '#2c3e50',
        'gradient_start_color': '#f5f7fa',
        'gradient_end_color': '#c3cfe2',
        'markdown_background_color': 'transparent',
        'markdown_text_color': '#ffffff',
        'sidebar_markdown': '',
    }

    # If no tenant customization is provided, return the defaults
    if tenant_customisation is None:
        return default_customisation

    # Start with the default customization
    customisation = default_customisation.copy()

    # Convert JSON string to dict if needed
    if isinstance(tenant_customisation, str):
        try:
            tenant_customisation = json.loads(tenant_customisation)
            current_app.logger.debug(f"Converted JSON string to dict: {tenant_customisation}")
        except json.JSONDecodeError as e:
            current_app.logger.error(f"Error parsing JSON customisation: {e}")
            return default_customisation

    # Update with tenant customization
    current_app.logger.debug(f"Tenant customisation - in default creation: {tenant_customisation}")
    if tenant_customisation:
        for key, value in tenant_customisation.items():
            if key in customisation:
                customisation[key] = value

    return customisation