require 'package'

class Helix_editor < Package
  description 'A vim inspired editor with LSP support'
  homepage 'https://helix-editor.com/'
  version '22.12'
  license 'MPL-2.0' # license of source
  compatibility 'all'
  source_url 'https://github.com/helix-editor/helix/archive/22.12.tar.gz'
  source_sha256 'edae8af46401b45c3e71c38b4fa99f931c4458127978ccd1b29aaae79331d972' # Use the command "sha256sum"
  binary_compression 'tar.zst'

  binary_sha256({
    aarch64: 'e0f204e70c5e68b4e1f547b87cd039ac389ae3df07adf78bb19fe0cfac944907',
     armv7l: 'e0f204e70c5e68b4e1f547b87cd039ac389ae3df07adf78bb19fe0cfac944907',
       i686: 'f852f67e7a33cfa320fd89f184780cd64503e8b10ab6a07e298f9cc0ed20f9b1',
     x86_64: 'c8771cd0b8b54f8f29411a21778add25c0f3702486589a31ccb13640ab2c3c24'
  })

  depends_on 'rust' => :build
  depends_on 'xdg_base'

  no_fhs
  no_shrink
  no_strip

  @xdg_config_home = ENV.fetch 'XDG_CONFIG_HOME', "#{CREW_PREFIX}/.config"
  @helix_runtime_dir = "#{@xdg_config_home}/helix"
  @build_folder_suffix = '/target/release'

  def self.build
    puts 'Building. This may be long.'
    system 'cargo build --release --locked'
  end

  def self.install
    # Copy executable
    helix_executable_dest_dir = "#{CREW_DEST_PREFIX}/bin"
    FileUtils.mkdir_p helix_executable_dest_dir.to_s
    FileUtils.install ".#{@build_folder_suffix}/hx", helix_executable_dest_dir.to_s, mode: 0o755
    # Copy runtime dir (without the sources)
    FileUtils.rm_rf './runtime/grammars/sources' # remove the sources
    helix_runtime_dest_dir = File.join(CREW_DEST_DIR, @helix_runtime_dir)
    FileUtils.mkdir_p helix_runtime_dest_dir.to_s
    FileUtils.cp_r './runtime', helix_runtime_dest_dir.to_s
  end

  def self.check
    # Ensure hx is executable
    command_status = system ".#{@build_folder_suffix}/hx --version", exception: false
    raise 'hx is not executable'.lightred unless command_status
  end

  def self.postinstall
    # This will print a warning if "hx" is not a valid command
    command_status = system 'hx --version', exception: false
    puts 'Warning: hx is not in PATH'.lightred unless command_status
    # Check if helix can find its runtime path
    if command_status
      command_output = `hx --health`
      unless command_output.include? @helix_runtime_dir
        puts "Warning: helix cannot find its runtime dir. \
        The environment variable HELIX_RUNTIME may need to be set.".lightred
      end
    end
    puts <<~EOT2.lightblue
      Use the 'hx' command to start helix.
      Use 'hx --health' to see if helix can find its runtime and to see which LSP servers are detected.
      Note that to be able to load some themes, helix needs to be started in a terminal it recognizes
      as supporting true colors.
    EOT2
  end

  def ask_to_remove_user_defined_config_files_in(dir)
    puts "\nRemove user defined files in folder: #{dir}? [y/N] "
    case $stdin.gets.chomp.downcase
    when 'y', 'yes'
      FileUtils.rm_rf config_dir.to_s
      puts "#{dir} removed.".lightgreen
    else
      puts "#{dir} was not removed.".lightblue
    end
  end

  def self.postremove
    # If the user added configuration files in @helix_runtime_dir, remove them if desired
    ask_to_remove_user_defined_config_files_in @helix_runtime_dir if Dir.exist? @helix_runtime_dir
    # If the user added a configuration dir in HOME, remove it if desired
    config_dir = "#{HOME}/.config/helix"
    ask_to_remove_user_defined_config_files_in config_dir if Dir.exist? config_dir
  end
end