# coding: utf-8
#
# Copyright (c) 2014 TechnoPark Corp.
# Copyright (c) 2014 Yegor Bugayenko
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the 'Software'), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

require 'pdd/puzzle'

module PDD
  # Source.
  class Source
    # Ctor.
    # +file+:: Absolute file name with source code
    # +path+:: Path to show (without full file name)
    def initialize(file, path)
      @file = file
      @path = path
    end

    # Fetch all puzzles.
    def puzzles
      re = /(.*(?:^|\s))@todo\s+#([\w\-\.:\/]+)\s+(.+)/
      puzzles = []
      lines = File.readlines(@file)
      lines.each_with_index do |line, idx|
        re.match(line) do |match|
          prefix = match[1] + ' '
          total = 0
          body = (match[3] + ' ' + lines.drop(idx + 1)
            .take_while { |txt| txt.start_with?(prefix) }
            .map { |txt| txt[prefix.length, txt.length] }
            .map do |txt|
              total += 1
              txt
            end
            .join(' '))
            .gsub(/\s+/, ' ')
            .strip
          puzzles << Puzzle.new(
            marker(match[2]).merge(
              lines: "#{idx + 1}-#{idx + total + 1}",
              body: body,
              file: @path
            )
          )
        end
      end
      puzzles
    end

    private

    # Parse a marker.
    def marker(text)
      re = /([\w\d\-\.]+)(?::(\d+)(?:(m|h)[a-z]*)?)?(?:\/([A-Z]+))?/
      match = re.match(text)
      fail "invalid puzzle marker: #{text}" if match.nil?
      {
        ticket: match[1],
        estimate: minutes(match[2], match[3]),
        role: match[4].nil? ? 'IMP' : match[4]
      }
    end

    # Parse minutes.
    def minutes(num, units)
      min = num.nil? ? 0 : Integer(num)
      min *= 60 if !units.nil? && units.start_with?('h')
      min
    end
  end
end