# encoding: UTF-8

require 'multi_json'
require 'pmap'

require_relative 'project'
require_relative 'project_role'

require_relative '../rest/object'

module GoodData
  class Membership < GoodData::Rest::Object
    attr_reader :json

    ASSIGNABLE_MEMBERS = [
      :email,
      :first_name,
      :last_name,
      :login,
      :phone,
      :status,
      :title
    ]

    class << self
      # Apply changes to object.
      #
      # @param obj [GoodData::User] Object to be modified
      # @param changes [Hash] Hash with modifications
      # @return [GoodData::User] Modified object
      def apply(obj, changes)
        changes.each do |param, val|
          next unless ASSIGNABLE_MEMBERS.include? param
          obj.send("#{param}=", val)
        end
        obj
      end

      # Gets hash representing diff of users
      #
      # @param user1 [GoodData::User] Original user
      # @param user2 [GoodData::User] User to compare with
      # @return [Hash] Hash representing diff
      def diff(user1, user2)
        res = {}
        ASSIGNABLE_MEMBERS.each do |k|
          l_value = user1.send("#{k}")
          r_value = user2.send("#{k}")
          res[k] = r_value if l_value != r_value
        end
        res
      end

      def diff_list(list1, list2)
        tmp = Hash[list1.map { |v| [v.email, v] }]

        res = {
          :added => [],
          :removed => [],
          :changed => [],
          :same => []
        }

        list2.each do |user_new|
          user_existing = tmp[user_new.email]
          if user_existing.nil?
            res[:added] << user_new
            next
          end

          if user_existing != user_new
            diff = self.diff(user_existing, user_new)
            res[:changed] << {
              :user => user_existing,
              :diff => diff
            }
          else
            res[:same] << user_existing
          end
        end

        tmp = Hash[list2.map { |v| [v.email, v] }]
        list1.each do |user_existing|
          user_new = tmp[user_existing.email]
          if user_new.nil?
            res[:removed] << user_existing
            next
          end
        end

        res
      end
    end

    def initialize(json)
      @json = json
    end

    # Checks objects for equality
    #
    # @param right [GoodData::User] Project to compare with
    # @return [Boolean] True if same else false
    def ==(other)
      res = true
      ASSIGNABLE_MEMBERS.each do |k|
        l_val = send("#{k}")
        r_val = other.send("#{k}")
        res = false if l_val != r_val
      end
      res
    end

    # Checks objects for non-equality
    #
    # @param right [GoodData::User] Project to compare with
    # @return [Boolean] True if different else false
    def !=(other)
      !(self == other)
    end

    # Apply changes to object.
    #
    # @param changes [Hash] Hash with modifications
    # @return [GoodData::User] Modified object
    def apply(changes)
      GoodData::User.apply(self, changes)
    end

    # Gets author (person who created)  of this object
    #
    # @return [String] Author
    def author
      url = @json['user']['meta']['author']
      data = client.get url
      client.factory.create(GoodData::Membership, data)
    end

    # Gets the contributor
    #
    # @return [String] Contributor
    def contributor
      url = @json['user']['meta']['contributor']
      data = client.get url
      client.factory.create(GoodData::Membership, data)
    end

    # Gets date when created
    #
    # @return [DateTime] Created date
    def created
      Time.parse(@json['user']['meta']['created'])
    end

    # Gets hash representing diff of users
    #
    # @param user [GoodData::User] Another profile to compare with
    # @return [Hash] Hash representing diff
    def diff(user)
      GoodData::User.diff(self, user)
    end

    # Gets the email
    #
    # @return [String] Email address
    def email
      @json['user']['content']['email'] || ''
    end

    # Sets the email
    #
    # @param new_email [String] New email to be assigned
    def email=(new_email)
      @json['user']['content']['email'] = new_email
    end

    # Gets the first name
    #
    # @return [String] First name
    def first_name
      @json['user']['content']['firstname'] || ''
    end

    # Sets the first name
    #
    # @param new_first_name [String] New first name to be assigned
    def first_name=(new_first_name)
      @json['user']['content']['firstname'] = new_first_name
    end

    # Gets the invitations
    #
    # @return [Array<GoodData::Invitation>] List of invitations
    def invitations
      res = []

      tmp = client.get @json['user']['links']['invitations']
      tmp['invitations'].each do |_invitation|
        # TODO: Something is missing here
      end

      res
    end

    # Gets the last name
    #
    # @return [String] Last name
    def last_name
      @json['user']['content']['lastname'] || ''
    end

    # Sets the last name
    #
    # @param new_last_name [String] New last name to be assigned
    def last_name=(new_last_name)
      @json['user']['content']['lastname'] = new_last_name
    end

    # Gets the login
    #
    # @return [String] Login
    def login
      @json['user']['content']['login'] || ''
    end

    # Sets the last name
    #
    # @param new_login [String] New login to be assigned
    def login=(new_login)
      @json['user']['content']['login'] = new_login
    end

    # Gets user raw object ID
    #
    # @return [String] Raw Object ID
    def obj_id
      uri.split('/').last
    end

    # Gets the permissions
    #
    # @return [Hash] Hash with permissions
    def permissions
      res = {}

      tmp = client.get @json['user']['links']['permissions']
      tmp['associatedPermissions']['permissions'].each do |permission_name, permission_value|
        res[permission_name] = permission_value
      end

      res
    end

    # Gets the phone number
    #
    # @return [String] Phone number
    def phone
      @json['user']['content']['phonenumber'] || ''
    end

    # Sets the phone number
    #
    # @param new_phone_number [String] New phone number to be assigned
    def phone=(new_phone_number)
      @json['user']['content']['phonenumber'] = new_phone_number
    end

    # Gets profile of this membership
    def profile
      raw = client.get @json['user']['links']['self']
      client.factory.create(GoodData::Profile, raw)
    end

    # Gets URL of profile membership
    def profile_url
      @json['user']['links']['self']
    end

    # Gets project which this membership relates to
    def project
      raw = client.get project_url
      client.factory.create(GoodData::Project, raw)
    end

    # Gets project id
    def project_id
      @json['user']['links']['roles'].split('/')[3]
    end

    # Gets project url
    def project_url
      @json['user']['links']['roles'].split('/')[0..3].join('/')
    end

    # Gets the projects of user
    #
    # @return [Array<GoodData::Project>] Array of projets
    def projects
      tmp = client.get @json['user']['links']['projects']
      tmp['projects'].map do |project_meta|
        project_uri = project_meta['project']['links']['self']
        project = client.get project_uri
        client.factory.create(GoodData::Project, project)
      end
    end

    # Gets first role
    def role
      roles.first
    end

    # Gets the project roles of user
    #
    # @return [Array<GoodData::ProjectRole>] Array of project roles
    def roles
      tmp = client.get @json['user']['links']['roles']
      tmp['associatedRoles']['roles'].pmap do |role_uri|
        role = client.get role_uri
        client.factory.create(GoodData::ProjectRole, role)
      end
    end

    # Gets the status
    #
    # @return [String] Status
    def status
      @json['user']['content']['status'] || ''
    end

    # Sets the status
    #
    # @param new_status [String] New phone number to be assigned
    def status=(new_status)
      @json['user']['content']['status'] = new_status
    end

    # Gets the title
    #
    # @return [String] User title
    def title
      @json['user']['meta']['title'] || ''
    end

    # Sets the title
    #
    # @param new_title [String] New title to be assigned
    def title=(new_title)
      @json['user']['content']['title'] = new_title
    end

    # Gets the date when updated
    #
    # @return [DateTime] Date of last update
    def updated
      DateTime.parse(@json['user']['meta']['updated'])
    end

    # Gets the object URI
    #
    # @return [String] Object URI
    def uri
      @json['user']['links']['self']
    end

    # Enables membership
    #
    # @return result from post execution
    def enable
      self.status = 'enabled'
    end

    # Disables membership
    #
    # @return result from post execution
    def disable
      self.status = 'disabled'
    end

    private

    # Sets status to 'ENABLED' or 'DISABLED'
    def status=(new_status)
      payload = {
        'user' => {
          'content' => {
            'status' => new_status.to_s.upcase,
            'userRoles' => @json['user']['content']['userRoles']
          },
          'links' => {
            'self' => uri
          }
        }
      }

      @json = client.post("/gdc/projects/#{project_id}/users", payload)
    end
  end
end