#
# Cookbook Name:: mariadb
# Recipe:: galera
#
# Copyright 2014, blablacar.com
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

case node['mariadb']['install']['type']
when 'package'
  # include MariaDB repositories
  include_recipe "#{cookbook_name}::repository"

  case node['platform']
  when 'debian', 'ubuntu'
    include_recipe "#{cookbook_name}::_debian_galera"
  when 'redhat', 'centos', 'fedora', 'scientific', 'amazon'
    include_recipe "#{cookbook_name}::_redhat_galera"
  end
when 'from_source'
  # To be filled as soon as possible
end

if node['mariadb']['galera']['wsrep_sst_method'] == 'rsync'
  package 'rsync' do
    action :install
  end
else
  if node['mariadb']['galera']['wsrep_sst_method'] == 'xtrabackup'
    package 'percona-xtrabackup' do
      action :install
    end

    package 'socat' do
      action :install
    end
  end
end

include_recipe "#{cookbook_name}::config"

galera_cluster_nodes = []
if !node['mariadb'].attribute?('rspec') && Chef::Config[:solo]
  Chef::Log.warn('This recipe uses search. Chef Solo does not support search.')
else
  if node['mariadb']['galera']['cluster_search_query'].empty?
    galera_cluster_nodes = search(
      :node, \
      "mariadb_galera_cluster_name:#{node['mariadb']['galera']['cluster_name']}"
    )
  else
    galera_cluster_nodes = search 'node', node['mariadb']['galera']['cluster_search_query']
    log 'Chef search results' do
      message "Searching for \"#{node['mariadb']['galera']['cluster_search_query']}\" \
        resulted in \"#{galera_cluster_nodes}\" ..."
    end
  end
  # Sort Nodes by fqdn
  galera_cluster_nodes.sort! { |x, y| x[:fqdn] <=> y[:fqdn] }
end

first = true
gcomm = 'gcomm://'
galera_cluster_nodes.each do |lnode|
  next unless lnode.name != node.name
  gcomm += ',' unless first
  gcomm += lnode['fqdn']
  first = false
end

galera_options = {}

galera_options['wsrep_cluster_address'] = gcomm
galera_options['wsrep_cluster_name']    = \
  node['mariadb']['galera']['cluster_name']
galera_options['wsrep_sst_method']      = \
  node['mariadb']['galera']['wsrep_sst_method']
if node['mariadb']['galera'].attribute?('wsrep_sst_auth')
  galera_options['wsrep_sst_auth']        = \
    node['mariadb']['galera']['wsrep_sst_auth']
end
galera_options['wsrep_provider']        = \
  node['mariadb']['galera']['wsrep_provider']
galera_options['wsrep_slave_threads']   = node['cpu']['total'] * 4
node['mariadb']['galera']['options'].each do |key, value|
  galera_options[key] = value
end

mariadb_configuration 'galera' do
  section 'mysqld'
  option galera_options
  action :add
end

#
# Under debian system we have to change the debian-sys-maint default password.
# This password is the same for the overall cluster.
#
if platform?('debian', 'ubuntu')
  template '/etc/mysql/debian.cnf' do
    sensitive true
    source 'debian.cnf.erb'
    owner 'root'
    group 'root'
    mode '0600'
  end

  execute 'correct-debian-grants' do
    # Add sensitive true when foodcritic #233 fixed
    command 'mysql -r -B -N -e "GRANT SELECT, INSERT, UPDATE, DELETE, '\
      'CREATE, DROP, RELOAD, SHUTDOWN, PROCESS, FILE, REFERENCES, INDEX, '\
      'ALTER, SHOW DATABASES, SUPER, CREATE TEMPORARY TABLES, '\
      'LOCK TABLES, EXECUTE, REPLICATION SLAVE, REPLICATION CLIENT, '\
      'CREATE VIEW, SHOW VIEW, CREATE ROUTINE, ALTER ROUTINE, '\
      "CREATE USER, EVENT, TRIGGER ON *.* TO '" + \
      node['mariadb']['debian']['user'] + \
      "'@'" + node['mariadb']['debian']['host'] + "' IDENTIFIED BY '" + \
      node['mariadb']['debian']['password'] + "' WITH GRANT OPTION\""
    action :run
    only_if do
      cmd = Mixlib::ShellOut.new("/usr/bin/mysql --user=\"" + \
        node['mariadb']['debian']['user'] + \
        "\" --password=\"" + node['mariadb']['debian']['password'] + \
        "\" -r -B -N -e \"SELECT 1\"")
      cmd.run_command
      cmd.error?
    end
    ignore_failure true
  end
end