# This file is a part of Redmine CRM (redmine_contacts) plugin,
# customer relationship management plugin for Redmine
#
# Copyright (C) 2010-2018 RedmineUP
# http://www.redmineup.com/
#
# redmine_contacts is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# redmine_contacts is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with redmine_contacts.  If not, see <http://www.gnu.org/licenses/>.

class ContactsSetting < ActiveRecord::Base
  unloadable
  include Redmine::SafeAttributes

  TAX_TYPE_EXCLUSIVE = 1
  TAX_TYPE_INCLUSIVE = 2

  belongs_to :project

  attr_protected :id if ActiveRecord::VERSION::MAJOR <= 4
  safe_attributes 'name', 'value', 'project_id'

  cattr_accessor :settings
  acts_as_attachable

  # Hash used to cache setting values
  @contacts_cached_settings = {}
  @contacts_cached_cleared_on = Time.now

  validates_uniqueness_of :name, :scope => [:project_id]

  # Returns the value of the setting named name
  def self.[](name, project_id)
    project_id = project_id.id if project_id.is_a?(Project)
    v = @contacts_cached_settings[hk(name, project_id)]
    v ? v : (@contacts_cached_settings[hk(name, project_id)] = find_or_default(name, project_id).value)
  end

  def self.[]=(name, project_id, v)
    project_id = project_id.id if project_id.is_a?(Project)
    setting = find_or_default(name, project_id)
    setting.value = (v ? v : '')
    @contacts_cached_settings[hk(name, project_id)] = nil
    setting.save
    setting.value
  end

  # Checks if settings have changed since the values were read
  # and clears the cache hash if it's the case
  # Called once per request
  def self.check_cache
    settings_updated_on = ContactsSetting.maximum(:updated_on)
    if settings_updated_on && @contacts_cached_cleared_on <= settings_updated_on
      clear_cache
    end
  end

  # Clears the settings cache
  def self.clear_cache
    @contacts_cached_settings.clear
    @contacts_cached_cleared_on = Time.now
    logger.info 'Contacts settings cache cleared.' if logger
  end

  def self.contact_name_format
    Setting.plugin_redmine_contacts['name_format'] || :firstname_lastname
  end

  def self.vcard?
    Object.const_defined?(:Vcard)
  end

  def self.spreadsheet?
    Object.const_defined?(:Spreadsheet)
  end

  def self.monochrome_tags?
    !!Setting.plugin_redmine_contacts['monochrome_tags']
  end

  def self.contacts_show_in_top_menu?
    !!Setting.plugin_redmine_contacts['contacts_show_in_top_menu']
  end

  def self.contacts_show_in_app_menu?
    !!Setting.plugin_redmine_contacts['contacts_show_in_app_menu']
  end

  def self.default_country
    Setting.plugin_redmine_contacts['default_country']
  end

  def self.cross_project_contacts?
    Setting.plugin_redmine_contacts['cross_project_contacts'].to_i > 0
  end

  # Finance

  def self.default_currency
    Setting.plugin_redmine_contacts['default_currency'] || 'USD'
  end

  def self.major_currencies
    currencies = Setting.plugin_redmine_contacts['major_currencies'].to_s.split(',').select { |c| !c.blank? }.map(&:strip)
    currencies = %w(USD EUR GBP RUB CHF) if currencies.blank?
    currencies.compact.uniq
  end

  def self.default_tax
    Setting.plugin_redmine_contacts['default_tax'].to_f
  end

  def self.tax_type
    ((['1', '2'] & [Setting.plugin_redmine_contacts['tax_type'].to_s]).first || TAX_TYPE_EXCLUSIVE).to_i
  end

  def self.tax_exclusive?
    ContactsSetting.tax_type == TAX_TYPE_EXCLUSIVE
  end

  def self.thousands_delimiter
    ([' ', ',', '.'] & [Setting.plugin_redmine_contacts['thousands_delimiter']]).first || ' '
  end

  def self.decimal_separator
    ([',', '.'] & [Setting.plugin_redmine_contacts['decimal_separator']]).first || '.'
  end

  def self.disable_taxes?
    !!Setting.plugin_redmine_contacts['disable_taxes']
  end

  def self.post_address_format
    unless Setting.plugin_redmine_contacts['post_address_format'].blank?
      Setting.plugin_redmine_contacts['post_address_format'].to_s.strip
    else
      "%street1%\n%street2%\n%city%, %postcode%\n%region%\n%country%"
    end
  end
  def self.deals_show_in_top_menu?
    !!Setting.plugin_redmine_contacts['deals_show_in_top_menu']
  end

  def self.deals_show_in_app_menu?
    !!Setting.plugin_redmine_contacts['deals_show_in_app_menu']
  end

  private

  def self.hk(name, project_id)
    "#{name}-#{project_id.to_s}"
  end

  # Returns the Setting instance for the setting named name
  # (record found in database or new record with default value)
  def self.find_or_default(name, project_id)
    name = name.to_s
    setting = find_by_name_and_project_id(name, project_id)
    setting ||= new(:name => name, :value => '', :project_id => project_id)
  end

end