#!/usr/bin/env ruby
# frozen_string_literal: true

require 'open3'

ROOT = File.expand_path('..', __dir__).freeze

EXE           = File.expand_path('exe/repubmark',       ROOT).freeze
EXAMPLES      = File.expand_path('examples',            ROOT).freeze
EXAMPLES_GLOB = File.expand_path('examples/*.repub',    ROOT).freeze
CONFIG        = File.expand_path('examples/config.yml', ROOT).freeze

PROFILES = [
  %w[summary_plain summary.txt],
  %w[http html],
  %w[gemini gmi],
  %w[chapters chapters.json],
].map(&:freeze).freeze

Dir[EXAMPLES_GLOB].each do |example_filename|
  example = File.read example_filename
  PROFILES.each do |profile_name, expected_ext|
    expected_filename = "#{example_filename[...-6]}.#{expected_ext}"
    expected = File.read expected_filename

    puts '=' * 80
    puts "Config:   #{CONFIG}"
    puts "Example:  #{example_filename}"
    puts "Profile:  #{profile_name}"
    puts "Expected: #{expected_filename}"
    puts '-' * 80
    puts example.strip
    puts '-' * 80
    puts expected.strip

    stdin, stdout, wait_thr = Open3.popen2 EXE, CONFIG, profile_name
    stdin.puts example
    stdin.close
    result = stdout.read
    stdout.close
    raise 'Template engine error' unless wait_thr.value.success?
    next if result == expected

    puts '-' * 80
    puts result.strip
    puts '=' * 80
    raise 'Invalid output'
  end
end

puts '=' * 80