require "db/exceptions/invalid_record"
require "db/mongo/models/user"

module Devops
  module Version2_0
    module Handler
      class User

        def self.get_users
          lambda {
            check_privileges("user", "r")
            users = settings.mongo.users.map {|i| i.to_hash}
            users.each {|u| u.delete("password")}
            json users
          }
        end

        def self.create_user
          lambda {
            check_privileges("user", "w")
            user = create_object_from_json_body
            ["username", "password", "email"].each do |p|
              check_string(user[p], "Parameter '#{p}' must be a not empty string")
            end
            settings.mongo.user_insert User.new(user)
            create_response("Created", nil, 201)
          }
        end

        def self.delete_user
          lambda {
            check_privileges("user", "w")
            projects = settings.mongo.projects_by_user params[:user]
            if !projects.empty?
              str = ""
              projects.each do |p|
                p.deploy_envs.each do |e|
                  str+="#{p.id}.#{e.identifier} " if e.users.include? params[:user]
                end
              end
              logger.info projects
              raise DependencyError.new "Deleting is forbidden: User is included in #{str}"
              #return [400, "Deleting is forbidden: User is included in #{str}"]
            end

            r = settings.mongo.user_delete params[:user]
            create_response("User '#{params[:user]}' removed")
          }
        end

        def self.change_user_privileges
          lambda {
            check_privileges("user", "w")
            data = create_object_from_json_body
            user = settings.mongo.user params[:user]
            cmd = check_string(data["cmd"], "Parameter 'cmd' should be a not empty string", true) || ""
            privileges = check_string(data["privileges"], "Parameter 'privileges' should be a not empty string", true) || ""
            user.grant(cmd, privileges)
            settings.mongo.user_update user
            create_response("Updated")
          }
        end

        def self.change_user_email_or_password
          lambda {
            check_privileges("user", "w")
            action = File.basename(request.path)
            u = File.basename(File.dirname(request.path))
            raise InvalidPrivileges.new("Access denied for '#{request.env['REMOTE_USER']}'") if u == User::ROOT_USER_NAME and request.env['REMOTE_USER'] != User::ROOT_USER_NAME

            check_privileges("user", "w") unless request.env['REMOTE_USER'] == u

            body = create_object_from_json_body
            p = check_string(body[action], "Parameter '#{action}' must be a not empty string")
            user = settings.mongo.user u
            user.send("#{action}=", p)
            settings.mongo.user_update user
            create_response("Updated")
          }
        end
      end
    end
  end
end