/**
 * Parse plugin error message from nested error structure
 * Extracts the real error message from PluginInvokeError JSON string
 *
 * @example
 * Input: { message: "req_id: xxx PluginInvokeError: {\"message\":\"Bad credentials\"}" }
 * Output: "Bad credentials"
 *
 * @param error - Error object (an Error or object with a message property)
 * @returns Parsed error message
 */
export const parsePluginErrorMessage = (error: any): string => {
  const rawMessage = error?.message || error?.toString() || 'Unknown error'

  // Try to extract nested JSON from PluginInvokeError
  // Use greedy match .+ to capture the complete JSON object with nested braces
  const pluginErrorPattern = /PluginInvokeError:\s*(\{.+\})/
  const match = pluginErrorPattern.exec(rawMessage)

  if (match) {
    try {
      const errorData = JSON.parse(match[1]!)
      // Return the inner message if exists
      if (errorData.message) return errorData.message
      // Fallback to error_type if message not available
      if (errorData.error_type) return errorData.error_type
    } catch (parseError) {
      console.warn('Failed to parse plugin error JSON:', parseError)
    }
  }

  return rawMessage
}