# frozen_string_literal: true

module Bundler
  class CLI::Pristine
    def initialize(gems)
      @gems = gems
    end

    def run
      CLI::Common.ensure_all_gems_in_lockfile!(@gems)
      definition = Bundler.definition
      definition.validate_runtime!
      installer = Bundler::Installer.new(Bundler.root, definition)

      ProcessLock.lock do
        installed_specs = definition.specs.reject do |spec|
          next if spec.name == "bundler" # Source::Rubygems doesn't install bundler
          next if !@gems.empty? && !@gems.include?(spec.name)

          gem_name = "#{spec.name} (#{spec.version}#{spec.git_version})"
          gem_name += " (#{spec.platform})" if !spec.platform.nil? && spec.platform != Gem::Platform::RUBY

          case source = spec.source
          when Source::Rubygems
            cached_gem = spec.cache_file
            unless File.exist?(cached_gem)
              Bundler.ui.error("Failed to pristine #{gem_name}. Cached gem #{cached_gem} does not exist.")
              next
            end

            FileUtils.rm_rf spec.full_gem_path
          when Source::Git
            if source.local?
              Bundler.ui.warn("Cannot pristine #{gem_name}. Gem is locally overridden.")
              next
            end

            source.remote!
            if extension_cache_path = source.extension_cache_path(spec)
              FileUtils.rm_rf extension_cache_path
            end
            FileUtils.rm_rf spec.extension_dir
            FileUtils.rm_rf spec.full_gem_path
          else
            Bundler.ui.warn("Cannot pristine #{gem_name}. Gem is sourced from local path.")
            next
          end

          true
        end.map(&:name)

        jobs = installer.send(:installation_parallelization, {})
        pristine_count = definition.specs.count - installed_specs.count
        # allow a pristining a single gem to skip the parallel worker
        jobs = [jobs, pristine_count].min
        ParallelInstaller.call(installer, definition.specs, jobs, false, true, skip: installed_specs)
      end
    end
  end
end