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/*
 * Copyright Camunda Services GmbH and/or licensed to Camunda Services GmbH under
 * one or more contributor license agreements. See the NOTICE file distributed
 * with this work for additional information regarding copyright ownership.
 * Licensed under the Camunda License 1.0. You may not use this file
 * except in compliance with the Camunda License 1.0.
 */
package io.camunda.tasklist.webapp.security;

import io.camunda.tasklist.exceptions.TasklistRuntimeException;
import io.camunda.tasklist.webapp.graphql.entity.UserDTO;
import io.camunda.tasklist.webapp.rest.exception.UnauthenticatedUserException;
import java.util.List;
import java.util.Optional;
import org.springframework.security.authentication.AnonymousAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.oauth2.server.resource.authentication.JwtAuthenticationToken;

public interface UserReader {

  String DEFAULT_ORGANIZATION = "null";

  String DEFAULT_USER = "No name";

  default UserDTO getCurrentUser() {
    final Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
    if (authentication instanceof AnonymousAuthenticationToken) {
      throw new UnauthenticatedUserException("User is not authenticated");
    }

    return getCurrentUserBy(authentication)
        .orElseThrow(
            () ->
                new TasklistRuntimeException(
                    String.format(
                        "Could not build UserDTO from authentication %s", authentication)));
  }

  Optional getCurrentUserBy(final Authentication authentication);

  String getCurrentOrganizationId();

  default String getCurrentUserId() {
    final Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
    if (authentication == null || authentication.getPrincipal() == null) {
      return DEFAULT_USER;
    }

    if (authentication instanceof JwtAuthenticationToken) {
      final JwtAuthenticationToken jwt = (JwtAuthenticationToken) authentication;
      return authentication.getName();
    }

    return authentication.getPrincipal().toString();
  }

  List getUsersByUsernames(List usernames);

  default String getUserToken() {
    final Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
    if (authentication instanceof AnonymousAuthenticationToken) {
      throw new UnauthenticatedUserException("User is not authenticated");
    }

    return getUserToken(authentication)
        .orElseThrow(
            () ->
                new TasklistRuntimeException(
                    String.format(
                        "Could not build UserDTO from authentication %s", authentication)));
  }

  Optional getUserToken(final Authentication authentication);
}