generate_server_commands

#!/usr/bin/env ruby
# frozen_string_literal: true

require 'fileutils'

def snake_case(str)
  return str.downcase if str =~ /\A[A-Z]+\z/

  str.gsub(/([A-Z]+)([A-Z][a-z])/, '\1_\2')
     .gsub(/([a-z])([A-Z])/, '\1_\2')
     .downcase
end

def make_identifier(str)
  str.split(/[_-]/).collect(&:capitalize).join
end

def file_header(package_name)
  <<~ENDFUNC
    // Code generated by generate_server_commands; DO NOT EDIT.

    package #{package_name}

    import "context"
    import "path"

  ENDFUNC
end

def test_header(package_name)
  <<~ENDFUNC
    // Code generated by generate_server_commands; DO NOT EDIT.

    package #{package_name}

    import (
      "path"
      "testing"

      "gotest.tools/v3/assert"
    )

  ENDFUNC
end

def make_server_identifier(command)
  # FIXME: This is hacky. Sorry.
  return make_identifier("#{command}_for_server") if command.include?('console')

  make_identifier("#{command}_server")
end

def generate_server_command(command, text)
  identifier = make_server_identifier(command)
  <<~ENDFUNC
    // #{identifier} #{text}
    func (c *Client) #{identifier}(ctx context.Context, identifier string) (*Server, error) {
      return apiPost[Server](ctx, c, path.Join(serverAPIPath, identifier, "#{command}"), nil)
    }

  ENDFUNC
end

def generate_server_command_test(command)
  identifier = make_server_identifier(command)
  <<~ENDFUNC
    func Test#{identifier}(t *testing.T) {
      instance := testModify[Server, string](
        t,
        (*Client).#{identifier},
        "srv-lv426",
        "server",
        "POST",
        path.Join("servers", "srv-lv426", "#{command}"),
        "",
      )
      assert.Equal(t, instance.ID, "srv-lv426")
    }

  ENDFUNC
end

commands = {
  'start' => 'will issue a start request for the server to become active.',
  'stop' => 'will issue a stop request for the server to become inactve.',
  'reboot' => 'issues a "soft" reboot to the server, however the OS make ignore it. The console remains connected.',
  'reset' => 'issues a "hard" reboot to the server which cannot be ignored by the OS. The console remains connected.',
  'shutdown' => 'will issue a safe shutdown request to the server.',
  'activate_console' => 'will issue a request to enable the graphical console for an existing server.'
}

File.open('server_commands.go', 'w') do |f|
  f << file_header('brightbox')
  commands.each do |k, v|
    f << generate_server_command(k, v)
  end
end

File.open('server_commands_test.go', 'w') do |f|
  f << test_header('brightbox')
  commands.each_key do |k|
    f << generate_server_command_test(k)
  end
end

exec('gofmt', '-w', 'server_commands.go', 'server_commands_test.go')