require_relative '../lib/const'
require_relative '../lib/package'

class Command
  def self.help(command)
    case command
    when 'build'
      puts <<~EOT
        Build package(s).
        Usage: crew build [-f|--force] [-k|--keep] [-v|--verbose] <package1> [<package2> ...]
        Build package(s) from source and place the archive and checksum in the `CREW_LOCAL_BUILD_DIR/release/<arch>` directory.
        Build package(s) from source and place the archive and checksum in the current working directory.
        If `-f` or `--force` is present, interactive prompts will be disabled.
        If `-k` or `--keep` is present, the `CREW_BREW_DIR` (#{CREW_BREW_DIR}) directory will remain.
        If `-v` or `--verbose` is present, extra information will be displayed.
      EOT
    when 'check'
      puts <<~EOT
        Check package(s) for syntax errors.
        Usage: crew check [-f|--force] <package1> [<package2> ...]
        If `-f` or `--force` is present, interactive prompts will be disabled.
      EOT
    when 'const'
      puts <<~EOT
        Display constant(s).
        Usage: crew const [<const1> <const2> ...]
        If no constants are provided, all constants will be displayed.
      EOT
    when 'deps'
      puts <<~EOT
        Display dependencies of package(s).
        Usage: crew deps [-t|--tree] [-b|--include-build-deps] [--exclude-buildessential] <package1> [<package2> ...]
        If `-t` or `--tree` specified, dependencies will be printed in a tree-structure format
        If `-b` or `--include-build-deps` specified, build dependencies will be included in output
        It `--exclude-buildessential` specified, `buildessential` and its dependencies will not be inserted automatically
      EOT
    when 'diskstat'
      puts <<~EOT
        Show statistics about disk space occupied by installed Chromebrew packages.
        Usage: crew diskstat [-a|--all] [<count>]
        Only <count> (default: 25) of the largest packages will be shown by default. Use `--all` to show the occupied disk space for all installed packages.
      EOT
    when 'download'
      puts <<~EOT
        Download package(s).
        Usage: crew download [-s|--source] [-v|--verbose] <package1> [<package2> ...]
        Download package(s) to `CREW_BREW_DIR` (#{CREW_BREW_DIR}), but don't install.
        If `-s` or `--source` is present, the source will be downloaded instead of the binary.
        If `-v` or `--verbose` is present, extra information will be displayed.
      EOT
    when 'files'
      puts <<~EOT
        Display installed files of package(s).
        Usage: crew files <package1> [<package2> ...]
        The package(s) must be currently installed.
      EOT
    when 'install'
      puts <<~EOT
        Install package(s).
        Usage: crew install [-f|--force] [-k|--keep] [-s|--source] [-S|--recursive-build] [-v|--verbose] <package1> [<package2> ...]
        The package(s) must have a valid name.  Use `crew search <pattern>` to search for packages to install.
        If `-f` or `--force` is present, interactive prompts will be disabled.
        If `-k` or `--keep` is present, the `CREW_BREW_DIR` (#{CREW_BREW_DIR}) directory will remain.
        If `-s` or `--source` is present, the package(s) will be compiled instead of installed via binary.
        If `-S` or `--recursive-build` is present, the package(s), including all dependencies, will be compiled instead of installed via binary.
        If `-v` or `--verbose` is present, extra information will be displayed.
      EOT
    when 'license'
      puts <<~EOT
        Display the crew license.
        Usage: crew license
      EOT
    when 'list'
      puts <<~EOT
        List packages.
        Usage: crew list [-v|--verbose] available|installed|compatible|incompatible
      EOT
    when 'postinstall'
      puts <<~EOT
        Display postinstall messages of package(s).
        Usage: crew postinstall <package1> [<package2> ...]
        The package(s) must be currently installed.
      EOT
    when 'prop'
      puts <<~EOT
        Explain the purpose of various package boolean properties.
        Usage: crew prop <property>
        Available properties: #{Package.available_boolean_properties.join(', ')}
      EOT
    when 'reinstall'
      puts <<~EOT
        Remove and install package(s).
        Usage: crew reinstall [-f|--force] [-k|--keep] [-s|--source] [-S|--recursive-build] [-v|--verbose] <package1> [<package2> ...]
        If `-f` or `--force` is present, interactive prompts will be disabled.
        If `-k` or `--keep` is present, the `CREW_BREW_DIR` (#{CREW_BREW_DIR}) directory will remain.
        If `-s` or `--source` is present, the package(s) will be compiled instead of installed via binary.
        If `-S` or `--recursive-build` is present, the package(s), including all dependencies, will be compiled instead of installed via binary.
        If `-v` or `--verbose` is present, extra information will be displayed.
      EOT
    when 'remove'
      puts <<~EOT
        Remove package(s).
        Usage: crew remove [-f|--force] [-v|--verbose] <package1> [<package2> ...]
        The package(s) must be currently installed.
        If `-f` or `--force` is present, interactive prompts will be disabled.
        If `-v` or `--verbose` is present, extra information will be displayed.
      EOT
    when 'search'
      puts <<~EOT
        Look for package(s).
        Usage: crew search [-v|--verbose] [<pattern> ...]
        Both the name and description of packages will be searched.
        If the package color is #{'green'.lightgreen}, it means the package is installed.
        If the package color is #{'red'.lightred}, it means the architecture is not supported.
        If the package color is #{'blue'.lightblue}, it means the architecture is supported but the package is not installed.
        The <pattern> string can also contain regular expressions.
        If `-v` or `--verbose` is present, the homepage, version and license of found packages will be displayed.
        Examples:
          #{'crew search ^lib'.lightblue} will display all packages with a name or description that starts with `lib`.
          #{'crew search audio'.lightblue} will display all packages with `audio` in the name or description.
          #{'crew search -v git'.lightblue} will display all packages with `git` in the name or description along with homepage, version and license.
      EOT
    when 'sysinfo'
      puts <<~EOT
        Show system information.
        Usage: crew sysinfo [-v|--verbose]
        If `-v` or `--verbose` is present, show system information with raw markdown.
      EOT
    when 'update_package_file'
      puts <<~EOT
        Update crew.
        Usage: crew update_package_file [-v|--verbose] <package1> [<package2> ...]
        This updates the binary hashes in package files for generated
        and uploaded binaries.
      EOT
    when 'update'
      puts <<~EOT
        Update crew.
        Usage: crew update
        This only updates crew itself.  Use `crew upgrade` to update packages.
      EOT
    when 'upgrade'
      puts <<~EOT
        Update package(s).
        Usage: crew upgrade [-f|--force] [-s|--source] [-v|--verbose] <package1> [<package2> ...]
        If package(s) are omitted, all packages will be updated.  Otherwise, specific package(s) will be updated.
        Use `crew update` to update crew itself.
        If `-f` or `--force` is present, interactive prompts will be disabled.
        If `-s` or `--source` is present, the package(s) will be compiled instead of upgraded via binary.
        If `-v` or `--verbose` is present, extra information will be displayed.
      EOT
    when 'upload'
      puts <<~EOT
        Upload binaries.
        Usage: crew upload [-f|--force] [-v|--verbose] [<package1> <package2> ...]
        This will update the binary_sha256 hashes in each package and upload binaries to GitLab.
        The GITLAB_TOKEN environment variable must be set to access the upstream repository.
        If no package(s) are provided, all binaries in `#{CREW_LOCAL_REPO_ROOT}/release/<arch>` will be uploaded.
        If `-f` or `--force` is present, interactive prompts will be disabled.
        If `-v` or `--verbose` is present, additional debug information will be displayed.
      EOT
    when 'upstream'
      puts <<~EOT
        Check if an upstream version is available for package(s).
        Usage: crew upstream [-j|--json|-u|--update-package-files|-v|--verbose] [<package1> <package2> ...]
        If `-j` or `--json` is present, output will be in json format.
        If `-u` or `--update-package-files` is present, it will attempt to update the package version.
        If `-v` or `--verbose` is present, extra information will be displayed.
      EOT
    when 'version'
      puts <<~EOT
        Display the crew version.
        Usage: crew version
      EOT
    when 'whatprovides'
      puts <<~EOT
        Determine which package(s) contains file(s).
        Usage: crew whatprovides <pattern> ...
        The <pattern> is a search string which can contain regular expressions.
      EOT
    else
      puts <<~EOT
        Usage: crew help <command>
        Available commands: #{CREW_COMMANDS}
      EOT
    end
  end
end
