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

require 'json'
require 'open3'

EXE = File.expand_path('exe/referator', __dir__).freeze

RAW_REFS = {
  self: {
    foo: {
      'category' => 'self',
      'id' => '/blog/foo',
      'slug' => 'blog-foo',
      'text' => 'Foo',
    }.freeze,
    bar: {
      'category' => 'self',
      'id' => '/blog/bar',
      'slug' => 'blog-bar',
      'text' => 'Bar',
    }.freeze,
  }.freeze,
  link: {
    example_com: {
      'category' => 'link',
      'id' => 'example_com',
      'slug' => 'example-com',
      'url' => 'https://example.com',
      'text' => 'Example Domain',
    }.freeze,
    causa_arcana_com: {
      'category' => 'link',
      'id' => 'causa_arcana_com',
      'slug' => 'causa-arcana-com',
      'url' => 'https://causa-arcana.com',
      'text' => 'Causa Arcana',
    }.freeze,
  }.freeze,
}.freeze

REFS = {
  self: {
    foo: RAW_REFS[:self][:foo].merge(
      'anchor' => 'self-blog-foo',
      'fragment' => '#self-blog-foo',
    ).freeze,
    bar: RAW_REFS[:self][:bar].merge(
      'anchor' => 'self-blog-bar',
      'fragment' => '#self-blog-bar',
    ).freeze,
  }.freeze,
  link: {
    example_com: RAW_REFS[:link][:example_com].merge(
      'anchor' => 'link-example-com',
      'fragment' => '#link-example-com',
    ).freeze,
    causa_arcana_com: RAW_REFS[:link][:causa_arcana_com].merge(
      'anchor' => 'link-causa-arcana-com',
      'fragment' => '#link-causa-arcana-com',
    ).freeze,
  }.freeze,
}.freeze

workdir = File.expand_path('test', __dir__).freeze

@stdin, @stdout, @wait_thr = Open3.popen2 EXE, workdir, chdir: __dir__

@stdin.sync = true
@stdout.sync = true

at_exit do
  @stdin.close
  @stdout.close
  raise 'Script error' unless @wait_thr.value.success?
end

def cmd(name, data = nil)
  @stdin.puts "#{name} #{data.to_json}"
  result = @stdout.gets.chomp
  if result.start_with? 'OK '
    result = JSON.parse(result[3..]).freeze
    yield result if block_given?
    result
  elsif result.start_with? 'ERR '
    raise "Error response: #{result[4..]}"
  else
    raise 'Invalid response'
  end
end

###################
# REGISTER_SCRIPT #
###################

cmd :REGISTER_SCRIPT,
    { name: :render,
      vars: %i[template format notes note],
      args: ['./render.rb',
             { template: nil },
             { format: nil }],
      stdin: ['{',
              '"notes":',
              { notes: nil },
              ',',
              '"note":',
              { note: nil },
              '}'] }

#####################
# REGISTER_CATEGORY #
#####################

cmd :REGISTER_CATEGORY, :self
cmd :REGISTER_CATEGORY, :link

###################
# REGISTER_FORMAT #
###################

cmd :REGISTER_FORMAT, { name: :html, script: :render }
cmd :REGISTER_FORMAT, { name: :json, script: :render }

################
# REGISTER_REF #
################

cmd :REGISTER_REF, RAW_REFS[:self][:foo]
cmd :REGISTER_REF, RAW_REFS[:link][:example_com]

cmd(:EXEC, 'conf_register_ref') { |result| raise unless result.nil? }

#######
# REF #
#######

cmd :REF, { category: :self, id: '/blog/foo' } do |result|
  raise unless result == REFS[:self][:foo]
end

cmd :REF, { category: :self, id: '/blog/bar' } do |result|
  raise unless result == REFS[:self][:bar]
end

cmd :REF, { category: :link, id: :example_com } do |result|
  raise unless result == REFS[:link][:example_com]
end

cmd :REF, { category: :link, id: :causa_arcana_com } do |result|
  raise unless result == REFS[:link][:causa_arcana_com]
end

############
# MAKE_REF #
############

cmd :MAKE_REF, { category: :self, id: '/blog/foo' } do |result|
  raise unless result == REFS[:self][:foo]
end

cmd :MAKE_REF, { category: :link, id: :example_com } do |result|
  raise unless result == REFS[:link][:example_com]
end

cmd :MAKE_REF, { category: :self, id: '/blog/bar' } do |result|
  raise unless result == REFS[:self][:bar]
end

cmd :MAKE_REF, { category: :link, id: :causa_arcana_com } do |result|
  raise unless result == REFS[:link][:causa_arcana_com]
end

###################
# FETCH_FOOTNOTES #
###################

cmd :FETCH_FOOTNOTES do |result|
  raise unless result == {
    'self' => [
      REFS[:self][:foo].merge('index' => 1),
      REFS[:self][:bar].merge('index' => 2),
    ],
    'link' => [
      REFS[:link][:example_com].merge('index' => 3),
      REFS[:link][:causa_arcana_com].merge('index' => 4),
    ],
  }
end

##############
# FETCH_NOTE #
##############

cmd :FETCH_NOTE, { category: :self, id: '/blog/foo' } do |result|
  raise unless result == REFS[:self][:foo].merge('index' => 1)
end

cmd :FETCH_NOTE, { category: :self, id: '/blog/bar' } do |result|
  raise unless result == REFS[:self][:bar].merge('index' => 2)
end

cmd :FETCH_NOTE, { category: :link, id: :example_com } do |result|
  raise unless result == REFS[:link][:example_com].merge('index' => 3)
end

cmd :FETCH_NOTE, { category: :link, id: :causa_arcana_com } do |result|
  raise unless result == REFS[:link][:causa_arcana_com].merge('index' => 4)
end

####################
# RENDER_FOOTNOTES #
####################

cmd :RENDER_FOOTNOTES, :html do |result|
  expected = <<~HTML
    <h2>Self references</h2>

    <ol>
      <li id="self-blog-foo" value="1">
        <a href="/blog/foo.html">Foo</a>
      </li>
      <li id="self-blog-bar" value="2">
        <a href="/blog/bar.html">Bar</a>
      </li>
    </ol>

    <h2>Link references</h2>

    <ol>
      <li id="link-example-com" value="3">
        <a href="https://example.com">Example Domain</a>
      </li>
      <li id="link-causa-arcana-com" value="4">
        <a href="https://causa-arcana.com">Causa Arcana</a>
      </li>
    </ol>
  HTML

  raise unless result == expected
end

cmd :RENDER_FOOTNOTES, :json do |result|
  expected = <<~JSON
    {
      "self": [
        {
          "index": 1,
          "category": "self",
          "id": "/blog/foo",
          "slug": "blog-foo",
          "anchor": "self-blog-foo",
          "fragment": "#self-blog-foo",
          "url": "/blog/foo.html",
          "text": "Foo"
        },
        {
          "index": 2,
          "category": "self",
          "id": "/blog/bar",
          "slug": "blog-bar",
          "anchor": "self-blog-bar",
          "fragment": "#self-blog-bar",
          "url": "/blog/bar.html",
          "text": "Bar"
        }
      ],
      "link": [
        {
          "index": 3,
          "category": "link",
          "id": "example_com",
          "slug": "example-com",
          "anchor": "link-example-com",
          "fragment": "#link-example-com",
          "url": "https://example.com",
          "text": "Example Domain"
        },
        {
          "index": 4,
          "category": "link",
          "id": "causa_arcana_com",
          "slug": "causa-arcana-com",
          "anchor": "link-causa-arcana-com",
          "fragment": "#link-causa-arcana-com",
          "url": "https://causa-arcana.com",
          "text": "Causa Arcana"
        }
      ]
    }
  JSON

  raise unless result == expected
end

###################
# RENDER_CITE_SUP #
###################

cmd(
  :RENDER_CITE_SUP,
  { format: :html, category: :self, id: '/blog/foo' },
) do |result|
  raise unless result == "<sup><a href=\"#self-blog-foo\">[1]</a></sup>\n"
end

cmd(
  :RENDER_CITE_SUP,
  { format: :html, category: :self, id: '/blog/bar' },
) do |result|
  raise unless result == "<sup><a href=\"#self-blog-bar\">[2]</a></sup>\n"
end

cmd(
  :RENDER_CITE_SUP,
  { format: :html, category: :link, id: :example_com },
) do |result|
  raise unless result == "<sup><a href=\"#link-example-com\">[3]</a></sup>\n"
end

cmd(
  :RENDER_CITE_SUP,
  { format: :html, category: :link, id: :causa_arcana_com },
) do |result|
  raise unless result ==
               "<sup><a href=\"#link-causa-arcana-com\">[4]</a></sup>\n"
end

########
# EXIT #
########

cmd(:EXIT) { |result| raise unless result.nil? }