module Ci::CloudAccountManageable
  extend ActiveSupport::Concern

  included do
  end

  # 自有服务器绑定流程
  def bind_account!
    # 1. 保存华为云服务器帐号
    create_params = devops_params.merge(ip_num: IPAddr.new(devops_params[:ip_num].strip).to_i, secret: Ci::CloudAccount.encrypted_secret(devops_params[:secret]), server_type: Ci::CloudAccount::SERVER_TYPE_SELF)

    cloud_account = Ci::CloudAccount.new(create_params)
    cloud_account.user = current_user
    cloud_account.save!

    # 2. 生成oauth2应用程序的client_id和client_secrete
    gitea_oauth = Gitea::Oauth2::CreateService.call(current_user.gitea_token, {name: "pipeline-#{SecureRandom.hex(8)}", redirect_uris: ["#{cloud_account.drone_url}/login"]})
    logger.info "######### gitea_oauth: #{gitea_oauth}"

    raise 'Gitea接口异常' if gitea_oauth['client_id'].blank?

    oauth = Oauth.new(client_id: gitea_oauth['client_id'],
      client_secret: gitea_oauth['client_secret'],
      redirect_uri: gitea_oauth['redirect_uris'],
      gitea_oauth_id: gitea_oauth['id'],
      user_id: current_user.id)
    oauth.save!

    # 创建数据ci端数据库
    database_result = auto_create_database!(@connection, "#{current_user.login}_drone")
    logger.info "[CI::DbConnectable] auto_create_database's result: #{database_result}"

    # 初始化表结构
    sub_connection = connect_to_ci_database
    auto_create_table_structure!(sub_connection)

    rpc_secret = SecureRandom.hex 16
    logger.info "######### rpc_secret: #{rpc_secret}"

    # 3. 创建drone server
    drone_server_cmd = Ci::Drone::Server.new(current_user.login, oauth.client_id, oauth.client_secret, cloud_account.drone_host, rpc_secret).generate_cmd
    logger.info "######### drone_server_cmd: #{drone_server_cmd}"

    # 4. 创建drone client
    drone_client_cmd = Ci::Drone::Client.new(oauth.client_id, cloud_account.drone_ip, rpc_secret).generate_cmd
    logger.info "######### drone_client_cmd: #{drone_client_cmd}"

    # 5. 登录远程服务器，启动drone服务
    result = Ci::Drone::Start.new(cloud_account.account, cloud_account.visible_secret, cloud_account.drone_ip, drone_server_cmd, drone_client_cmd).run
    logger.info "######### result: #{result}"


    redirect_url = "#{cloud_account.drone_url}/login"
    logger.info "######### redirect_url: #{redirect_url}"

    return nil unless result.present?
    result && !result.blank? ? cloud_account : nil
  end

  def trustie_drone_server_config
    # 读取drone配置信息
    config = Rails.application.config_for(:configuration).symbolize_keys!
    trustie_drone_config = config[:trustie_drone].symbolize_keys!
    return trustie_drone_config
  end

  # trustie提供服务器,绑定流程
  def trustie_bind_account!
    trustie_drone_config = trustie_drone_server_config
    raise 'trustie_drone config missing' if trustie_drone_config.blank?

    # 创建云账号
    create_params = devops_params.merge(ip_num: IPAddr.new(trustie_drone_config[:ip_num].strip).to_i, secret: Ci::CloudAccount.encrypted_secret(trustie_drone_config[:secret]), server_type: Ci::CloudAccount::SERVER_TYPE_TRUSTIE)
    cloud_account = Ci::CloudAccount.new(create_params)
    cloud_account.user = current_user
    cloud_account.save!

    #生成oauth2应用程序的client_id和client_secrete
    gitea_oauth = Gitea::Oauth2::CreateService.call(current_user.gitea_token, {name: "pipeline-#{SecureRandom.hex(8)}", redirect_uris: ["#{cloud_account.drone_url}/login"]})
    logger.info "######### gitea_oauth: #{gitea_oauth}"

    raise 'Gitea接口异常' if gitea_oauth['client_id'].blank?

    oauth = Oauth.new(client_id: gitea_oauth['client_id'],
                      client_secret: gitea_oauth['client_secret'],
                      redirect_uri: gitea_oauth['redirect_uris'],
                      gitea_oauth_id: gitea_oauth['id'],
                      user_id: current_user.id)
    result = oauth.save!

    redirect_url = "#{cloud_account.drone_url}/login"
    logger.info "######### redirect_url: #{redirect_url}"

    return nil unless result.present?
    result ? cloud_account : nil
  end

  def unbind_account!
    cloud_account = current_user.ci_cloud_account
    return render_error('你未绑定CI服务器') if current_user.devops_step == User::DEVOPS_UNINIT || cloud_account.blank?

    if cloud_account.server_type == Ci::CloudAccount::SERVER_TYPE_SELF
      @connection.execute("DROP DATABASE IF EXISTS #{current_user.login}_drone") # TOTO drop drone database
    end

    cloud_account.destroy! unless cloud_account.blank?
    current_user.unbind_account!
  end

  def bind_hook!(user, cloud_account, repo)
    hook_params = {
      active: true,
      config: {
        content_type: "json",
        url: cloud_account.drone_url + "/hook?secret=#{repo.repo_signer}"
      },
      type: "gitea"
    }
    result = Gitea::Hooks::CreateService.call(user.gitea_token, user.login, repo.repo_name, hook_params)

    result[:status].present? ? nil : result
  end

  def check_bind_cloud_account!
    return [true, "你已经绑定了云帐号."] unless current_user.ci_cloud_account.blank?

    ip_num = IPAddr.new(devops_params[:ip_num]).to_i

    #自有服务器进行判断
    cloud_account = current_user.ci_cloud_account
    if cloud_account && cloud_account.server_type == Ci::CloudAccount::SERVER_TYPE_SELF
      Ci::CloudAccount.exists?(ip_num: ip_num) ? [true, "#{devops_params[:ip_num]}服务器已被使用."] : [false, nil]
    end
  end

  def check_trustie_bind_cloud_account!
    return [true, "你已经绑定了云帐号."] unless current_user.ci_cloud_account.blank?
  end

  def gitea_auto_create_auth_grant!(gitea_oauth_id)
    connection = Gitea::Database.set_connection.connection
    unix_time = Time.now.to_i

    # 目前直接操作db，可以建立对应的model进行操作
    sql = "REPLACE INTO oauth2_grant ( user_id, application_id, counter, created_unix, updated_unix ) VALUES ( #{current_user.gitea_uid}, #{gitea_oauth_id}, 0, #{unix_time}, #{unix_time} );"
    connection.execute(sql)

    #如果使用trustie提供的服务器，需要多增加一条授权信息
    if current_user.ci_cloud_account.server_type == Ci::CloudAccount::SERVER_TYPE_TRUSTIE
      trustie_drone_config = trustie_drone_server_config
      admin_application_id = trustie_drone_config[:admin_application_id]
      sql = "REPLACE INTO oauth2_grant ( user_id, application_id, counter, created_unix, updated_unix ) VALUES ( #{current_user.gitea_uid}, #{admin_application_id}, 0, #{unix_time}, #{unix_time} );"
      connection.execute(sql)
    end
  end

  def gitea_oauth_grant!(password, oauth)
    gitea_auto_create_auth_grant!(oauth&.gitea_oauth_id)

    state = SecureRandom.hex(8)
    # redirect_uri eg:
    #  https://localhost:3000/login/oauth/authorize?client_id=94976481-ad0e-4ed4-9247-7eef106007a2&redirect_uri=http%3A%2F%2F121.69.81.11%3A80%2Flogin&response_type=code&state=9cab990b9cfb1805
    redirect_uri = CGI.escape("#{@cloud_account.drone_url}/login")
    clientId = client_id(oauth)
    grant_url = "#{Gitea.gitea_config[:domain]}/login/oauth/authorize?client_id=#{clientId}&redirect_uri=#{redirect_uri}&response_type=code&state=#{state}"
    logger.info "[gitea] grant_url: #{grant_url}"

    conn = Faraday.new(url: grant_url) do |req|
      req.request :url_encoded
      req.adapter Faraday.default_adapter
      req.basic_auth(current_user.login, password)
    end

    response = conn.get
    logger.info "[gitea] response headers: #{response.headers}"

    drone_oauth_user!(response.headers.to_h['location'], state)
  end

  def drone_oauth_user!(url, state)
    logger.info "[drone] drone_oauth_user url: #{url}"
    conn = Faraday.new(url: url) do |req|
      req.request :url_encoded
      req.adapter Faraday.default_adapter
      req.headers["cookie"] = "_session_=#{SecureRandom.hex(28)}; _oauth_state_=#{state}"
    end

    response = conn.get
    logger.info "[drone] response headers: #{response.headers}"

    response.headers['location'].include?('error') ? false : true
  end

  private
    def devops_params
      params.permit(:account, :secret, :ip_num)
    end

  def client_id(oauth)
    #如果是使用trustie服务器使用管理员用户的clientId
    if current_user.ci_cloud_account.server_type == Ci::CloudAccount::SERVER_TYPE_TRUSTIE
      trustie_drone_config = trustie_drone_server_config
      return trustie_drone_config[:client_id]
    else
      return oauth&.client_id
    end
  end

end