# Copyright 2014 Michael Grosser under MIT License

# https://raw.githubusercontent.com/grosser/testrbl/master/lib/testrbl.rb
# BEGIN generated by rake update, do not modify

require 'maxitest/version'

module Maxitest
  module Testrbl
    PATTERNS = [
      /^(\s+)(should|test|it)(\s+|\s*\(\s*)['"](.*)['"](\s*\))?\s+do\s*(?:#.*)?$/,
      /^(\s+)(context|describe)(\s+|\s*\(\s*)['"]?(.*?)['"]?(\s*\))?\s+do\s*(?:#.*)?$/,
      /^(\s+)def(\s+)(test_)([a-z_\d]+)\s*(?:#.*)?$/
    ]

    OPTION_WITH_ARGUMENT = ["-I", "-r", "-n", "--name", "-e", "--exclude", "-s", "--seed"]
    INTERPOLATION = /\\\#\\\{.*?\\\}/

    class << self
      def run_from_cli(argv)
        if argv == ["-v"] || argv == ["--version"]
          puts Maxitest::VERSION
          exit 0
        end

        if argv == ["-h"] || argv == ["--help"]
          puts <<~EOF
            test given file, folder or file:line
            Usage: mtest foo_test.rb

            -v to run without bracktrace cleaner
            --changed to run all all tests in current `git diff` or `git show`
          EOF
          exit 0
        end

        files, options = partition_argv(argv)
        files.concat(changed_files) if options.delete("--changed")
        files = ["test"] if files.empty?
        files = files.map { |f| localize(f) }
        load_options, options = partition_options(options)

        if files.size == 1 and files.first =~ /^(\S+):(\d+)$/
          file = $1
          line = $2
          run(ruby + load_options + line_pattern_option(file, line) + options)
        else
          if files.size == 1 and File.file?(files.first)
            run(ruby + load_options + files + options)
          elsif options.none? { |arg| arg =~ /^-n/ }
            seed = if seed = options.index("--seed")
              ["--"] + options.slice!(seed, 2)
            else
              []
            end
            files = files.map { |f| File.directory?(f) ? all_test_files_in(f) : f }.flatten
            run(ruby + load_options + files.map { |f| "-r#{f}" } + options + ["-e", ""] + seed)
          else # pass though
            # no bundle exec: projects with mini and unit-test do not run well via bundle exec testrb
            run ["testrb"] + argv
          end
        end
      end

      # overwritten by maxitest to just return line
      def line_pattern_option(file, line)
        [file, "-n", "/#{pattern_from_file(File.readlines(file), line)}/"]
      end

      # usable via external tools like zeus
      def pattern_from_file(lines, line)
        possible_lines = lines[0..(line.to_i-1)].reverse

        found = possible_lines.map { |line| test_pattern_from_line(line) || block_start_from_line(line) }.compact

        # pattern and the groups it is nested under (like describe - describe - it)
        last_spaces = " " * 100
        patterns = found.select do |spaces, name|
          last_spaces = spaces if spaces.size < last_spaces.size
        end.map(&:last).compact

        return filter_duplicate_final(patterns).reverse.join(".*") if found.size > 0

        raise "no test found before line #{line}"
      end

      # only keep 1 pattern that stops matching via $
      def filter_duplicate_final(patterns)
        found_final = 0
        patterns.reject { |p| p.end_with?("$") and (found_final += 1) > 1 }
      end

      private

      def all_test_files_in(folder)
        Dir[File.join(folder, "{**/,}*_{test,spec}.rb")].uniq
      end

      def partition_options(options)
        next_is_before = false
        options.partition do |option|
          if next_is_before
            next_is_before = false
            true
          else
            if option =~ /^-(r|I)/
              next_is_before = (option.size == 2)
              true
            else
              false
            end
          end
        end
      end

      # fix 1.9 not being able to load local files
      def localize(file)
        file =~ /^[-a-z\d_]/ ? "./#{file}" : file
      end

      def partition_argv(argv)
        next_is_option = false
        argv.partition do |arg|
          if next_is_option
            next_is_option = false
          else
            if arg =~ /^-.$/ or  arg =~ /^--/ # single letter option followed by argument like -I test or long options like --verbose
              next_is_option = true if OPTION_WITH_ARGUMENT.include?(arg)
              false
            elsif arg =~ /^-/ # multi letter option like -Itest
              false
            else
              true
            end
          end
        end
      end

      def changed_files
        changed_files = sh("git status -s").split("\n").map { |l| l.strip.split(/\s+/, 2)[1] }

        if changed_files.empty?
          # user wants to test last commit and not current diff
          changed_files = sh("git show --name-only").split("\n\n").last.split("\n")
        end

        # we only want test files that were added or changed (not deleted)
        changed_files.select { |f| f =~ /_(test|spec)\.rb$/ && File.exist?(f) }
      end

      def sh(command)
        result = `#{command}`
        raise "Failed: #{command} -> #{result}" unless $?.success?
        result
      end

      def ruby
        if File.file?("Gemfile")
          ["ruby", "-rbundler/setup"] # faster then bundle exec ruby
        else
          ["ruby"]
        end
      end

      def run(command)
        puts command.join(" ")
        STDOUT.flush # if exec fails horribly we at least see some output
        Kernel.exec *command
      end

      def block_start_from_line(line)
        if line =~ /^(\s*).* do( \|.*\|)?$/
          [$1, nil]
        end
      end

      def test_pattern_from_line(line)
        PATTERNS.each do |r|
          next unless line =~ r
          whitespace, method, test_name = $1, $2, $4
          return [whitespace, test_pattern_from_match(method, test_name)]
        end
        nil
      end

      def test_pattern_from_match(method, test_name)
        regex = Regexp.escape(test_name).gsub("\\ "," ").gsub(INTERPOLATION, ".*")

        regex = if method == "test"
          # test "xxx -_ yyy"
          # test-unit:     "test: xxx -_ yyy"
          # activesupport: "test_xxx_-__yyy"
          "^test(: |_)#{regex.gsub(" ", ".")}$"
        elsif method == "describe" || (method == "context" && !via_shoulda?)
          "#{regex}(::)?"
        elsif method == "should" && via_shoulda?
          optional_test_name = "(?:\(.*\))?"
          "#{method} #{regex}\. #{optional_test_name}$"
        elsif ["it", "should"].include?(method) # minitest aliases for shoulda
          "#test_\\d+_#{regex}$"
        else
          regex
        end

        regex.gsub("'", ".")
      end

      def via_shoulda?
        return @via_shoulda if defined?(@via_shoulda)
        @via_shoulda = !File.exist?("Gemfile.lock") || File.read("Gemfile.lock").include?(" shoulda-context ")
      end
    end
  end
end
#END generated by rake update, do not modify
