class Fastlane::Actions::GcovrAction

def self.author
  "dtrenz"
end

def self.available_options
  [
    ['object_directory', 'Specify the directory that contains the gcov data files.'],
    ['output', 'Print output to this filename Keep the temporary *.gcov files generated by gcov.'],
    ['keep', 'Keep the temporary *.gcov files generated by gcov.'],
    ['delete', 'Delete the coverage files after they are processed.'],
    ['filter', 'Keep only the data files that match this regular expression'],
    ['exclude', 'Exclude data files that match this regular expression'],
    ['gcov_filter', 'Keep only gcov data files that match this regular expression'],
    ['gcov_exclude', 'Exclude gcov data files that match this regular expression'],
    ['root', 'Defines the root directory for source files.'],
    ['xml', 'Generate XML instead of the normal tabular output.'],
    ['xml_pretty', 'Generate pretty XML instead of the normal dense format.'],
    ['html', 'Generate HTML instead of the normal tabular output.'],
    ['html_details', 'Generate HTML output for source file coverage.'],
    ['html_absolute_paths', 'Set the paths in the HTML report to be absolute instead of relative'],
    ['branches', 'Tabulate the branch coverage instead of the line coverage.'],
    ['sort_uncovered', 'Sort entries by increasing number of uncovered lines.'],
    ['sort_percentage', 'Sort entries by decreasing percentage of covered lines.'],
    ['gcov_executable', 'Defines the name/path to the gcov executable].'],
    ['exclude_unreachable_branches', 'Exclude from coverage branches which are marked to be excluded by LCOV/GCOV markers'],
    ['use_gcov_files', 'Use preprocessed gcov files for analysis.'],
    ['print_summary', 'Prints a small report to stdout with line & branch percentage coverage']
  ]
end

def self.create_output_dir_if_not_exists(output_path)
  output_dir = File.dirname(output_path)
  # If the output directory doesn't exist, create it
  unless Dir.exist? output_dir
    FileUtils.mkpath output_dir
  end
end

def self.description
  "Runs test coverage reports for your Xcode project"
end

def self.is_supported?(platform)
  platform == :ios
end

def self.params_hash_to_cli_args(params)
  # Remove nil value params
  params = params.delete_if { |_, v| v.nil? }
  # Maps nice developer param names to CLI arguments
  params.map do |k, v|
    v ||= ""
    args = ARGS_MAP[k]
    if args
      value = (v != true && v.to_s.length > 0 ? "\"#{v}\"" : "")
      "#{args} #{value}".strip
    end
  end.compact
end

def self.run(params)
  unless Helper.test?
    raise "gcovr not installed".red if `which gcovr`.length == 0
  end
  # The args we will build with
  gcovr_args = nil
  # Allows for a whole variety of configurations
  if params.kind_of? Hash
    params_hash = params
    # Check if an output path was given
    if params_hash.key? :output
      create_output_dir_if_not_exists(params_hash[:output])
    end
    # Maps parameter hash to CLI args
    gcovr_args = params_hash_to_cli_args(params_hash)
  else
    gcovr_args = params
  end
  # Joins args into space delimited string
  gcovr_args = gcovr_args.join(" ")
  command = "gcovr #{gcovr_args}"
  Helper.log.info "Generating code coverage.".green
  Helper.log.debug command
  Actions.sh command
end