# Copyright (C) 2012-2014 Zammad Foundation, http://zammad-foundation.org/

class Setting < ApplicationModel
  store         :options
  store         :state
  store         :state_initial
  before_create :state_check, :set_initial
  before_update :state_check
  after_create  :delete_cache
  after_update  :delete_cache

  @@current = {} # rubocop:disable Style/ClassVars

  def self.load

    # check if config is already generated
    return @@current[:settings_config] if @@current[:settings_config]

    # read all config settings
    config = {}
    Setting.select('name, state').order(:id).each { |setting|
      config[setting.name] = setting.state[:value]
    }

    # config lookups
    config.each { |key, value|
      next if value.class.to_s != 'String'

      config[key].gsub!( /\#\{config\.(.+?)\}/ ) {
        config[$1].to_s
      }
    }

    # store for class requests
    @@current[:settings_config] = config
    config
  end

  def self.set(name, value)
    setting = Setting.find_by( name: name )
    if !setting
      fail "Can't find config setting '#{name}'"
    end
    setting.state = { value: value }
    setting.save
    logger.info "Setting.set() name:#{name}, value:#{value.inspect}"
  end

  def self.get(name)
    load
    @@current[:settings_config][name]
  end

  def self.reset(name)
    setting = Setting.find_by( name: name )
    if !setting
      fail "Can't find config setting '#{name}'"
    end
    setting.state = setting.state_initial
    setting.save
    logger.info "Setting.reset() name:#{name}, value:#{setting.state.inspect}"
    load
    @@current[:settings_config][name]
  end

  private

  def delete_cache
    @@current[:settings_config] = nil
  end

  def set_initial
    self.state_initial = state
  end

  def state_check

    return if !(state || state == false)

    return if !( !state.respond_to?('has_key?') || !state.key?(:value) )

    self.state = { value: state }
  end
end