module AppConfigRails

# File lib/app_config_rails.rb, line 6
def self.load_app_config!
  case db_config[:adapter]
  when 'mysql'
    configure_mysql
  when 'postgresql'
    configure_postgres
  when 'sqlite3'
    configure_sqlite
  else
    raise RuntimeError, "AppConfigRails: Database adapter '#{db_config[:adapter]}' not supported; please create an issue if you would like it implemented."
  end
end

# File lib/app_config_rails.rb, line 26
def self.configure_mysql
  raise RuntimeError, 'AppConfigRails: MySQL support not yet implemented.'
end

# File lib/app_config_rails.rb, line 30
def self.configure_postgres
  postgres = {
    host: db_config[:host],
    dbname: db_config[:database],
    table: 'app_config'
  }

  postgres[:port] = db_config[:port] if db_config[:port]

  postgres[:user] = db_config[:username] if db_config[:username]
  postgres[:password] = db_config[:password] if db_config[:password]

  # Catch PG::Error in case the app_config table (migration) hasn't been created.
  begin
    AppConfig.setup!(postgres: postgres)
  rescue ::PG::Error => e
    Rails.logger.warn "WARN: AppConfig table '#{postgres[:table]}' does not exist; migration has not been run."
  end
end

# File lib/app_config_rails.rb, line 51
def self.configure_sqlite
  raise RuntimeError, 'AppConfigRails: SQLite support not yet implemented.'
end

# File lib/app_config_rails.rb, line 21
def self.db_config
  @@__db_config ||= ActiveRecord::Base.connection_config
end