import Foundation

enum OpenAIHTTPError {
    static func userMessage(statusCode: Int, data: Data) -> String {
        switch statusCode {
        case 401, 403:
            return UserFacingError.generic
        case 429:
            return "Too many requests. Please wait a moment and try again."
        case 500...599:
            return "The service is temporarily unavailable. Please try again."
        default:
            if let message = errorMessage(from: data),
               let sanitized = UserFacingError.sanitized(message) {
                return sanitized
            }
            return UserFacingError.generic
        }
    }

    private static func errorMessage(from data: Data) -> String? {
        struct APIErrorResponse: Decodable {
            struct APIError: Decodable {
                let message: String
            }

            let error: APIError
        }

        return (try? JSONDecoder().decode(APIErrorResponse.self, from: data))?.error.message
    }
}