"""
Configuration Blueprint
Provides configuration information and environment variables endpoints.
"""

import os
from flask import Blueprint

from ..app import Config
from ..shared import _format_response, log_performance, logger

# Create blueprint
config_bp = Blueprint('config', __name__, url_prefix='/config')


@config_bp.route('', methods=['GET'])
@log_performance
def get_config():
    """Get current configuration (without sensitive information)."""
    logger.debug("Configuration requested")

    try:
        config_info = Config.to_dict()

        # Remove potentially sensitive information
        safe_config = config_info.copy()

        data = {
            "configuration": safe_config,
            "environment_variables": {
                "supported": [
                    "GASFLUX_HOST",
                    "GASFLUX_PORT",
                    "GASFLUX_DEBUG",
                    "GASFLUX_UPLOAD_FOLDER",
                    "GASFLUX_OUTPUT_FOLDER",
                    "GASFLUX_MAX_CONTENT_LENGTH",
                    "GASFLUX_LOG_LEVEL",
                    "GASFLUX_LOG_FILE",
                    "GASFLUX_CORS_ORIGINS",
                    "GASFLUX_TASK_CLEANUP_INTERVAL",
                    "GASFLUX_MAX_TASK_AGE",
                    "GASFLUX_THREADS",
                    "GASFLUX_CONNECTION_LIMIT",
                    "GASFLUX_CHANNEL_TIMEOUT"
                ],
                "current_values": {
                    key: os.getenv(key, "not set") if key.startswith("GASFLUX_") else "internal"
                    for key in [
                        "GASFLUX_HOST", "GASFLUX_PORT", "GASFLUX_DEBUG",
                        "GASFLUX_UPLOAD_FOLDER", "GASFLUX_OUTPUT_FOLDER",
                        "GASFLUX_MAX_CONTENT_LENGTH", "GASFLUX_LOG_LEVEL",
                        "GASFLUX_LOG_FILE", "GASFLUX_CORS_ORIGINS",
                        "GASFLUX_TASK_CLEANUP_INTERVAL", "GASFLUX_MAX_TASK_AGE",
                        "GASFLUX_THREADS", "GASFLUX_CONNECTION_LIMIT",
                        "GASFLUX_CHANNEL_TIMEOUT"
                    ]
                }
            }
        }
        return _format_response(200, "配置信息获取成功", data)

    except Exception as e:
        logger.error(f"Failed to retrieve configuration: {str(e)}", exc_info=True)
        return _format_response(500, "获取配置信息失败", {
            "error_details": str(e)
        })