# frozen_string_literal: true

require 'tempfile'
require 'json'
require 'active_support/core_ext/hash'
require 'rake'
require_relative '../deprecation_toolkit/read_write_helper'

class CIRecorder
  include Rake::DSL
  include DeprecationToolkit::ReadWriteHelper

  def initialize
    namespace :deprecation_toolkit do
      desc 'Parse a file generated with the CIOutputHelper and generate deprecations out of it'
      task :record_from_ci_output do
        raw_file = ENV.fetch('FILEPATH')

        deprecations = extract_deprecations_output(raw_file) do |file|
          parse_file(file)
        end

        generate_deprecations_file(deprecations)
      end
    end
  end

  private

  def extract_deprecations_output(file)
    tmp_file = Tempfile.new
    shell_command = "cat #{file} | sed -n -e 's/^.* \\[DeprecationToolkit\\] \\(.*\\)/\\1/p' > #{tmp_file.path}"

    raise "Couldn't extract deprecations from output" unless system(shell_command)
    yield(tmp_file)
  ensure
    tmp_file.delete
  end

  def parse_file(file)
    file.each.with_object({}) do |line, hash|
      hash.deep_merge!(JSON.parse(line))
    end
  end

  def generate_deprecations_file(deprecations_to_record)
    deprecations_to_record.each do |filename, deprecations|
      write(Pathname(filename), deprecations)
    end
  end
end

CIRecorder.new