# encoding: utf-8

class Nanoc3::OutdatednessCheckerTest < MiniTest::Unit::TestCase

  include Nanoc3::TestHelpers

  def test_not_outdated
    # Compile once
    with_site(:name => 'foo') do |site|
      File.open('content/index.html', 'w') { |io| io.write('o hello') }
      File.open('lib/stuff.rb', 'w') { |io| io.write('$foo = 123') }

      site.compile
    end

    # Check
    with_site(:name => 'foo') do |site|
      outdatedness_checker = site.compiler.send :outdatedness_checker
      rep = site.items[0].reps[0]
      assert_nil outdatedness_checker.outdatedness_reason_for(rep)
    end
  end

  def test_outdated_if_item_checksum_nil
    # Compile once
    with_site(:name => 'foo') do |site|
      File.open('content/index.html', 'w') { |io| io.write('o hello') }
      File.open('lib/stuff.rb', 'w') { |io| io.write('$foo = 123') }

      site.compile
    end

    # Delete checksums
    with_site(:name => 'foo') do |site|
      FileUtils.rm('tmp/checksums')
    end

    # Check
    with_site(:name => 'foo') do |site|
      outdatedness_checker = site.compiler.send :outdatedness_checker
      rep = site.items.find { |i| i.identifier == '/' }.reps[0]
      assert_equal ::Nanoc3::OutdatednessReasons::NotEnoughData,
        outdatedness_checker.outdatedness_reason_for(rep)
    end
  end

  def test_outdated_if_compiled_file_doesnt_exist
    # Compile once
    with_site(:name => 'foo') do |site|
      File.open('content/index.html', 'w') { |io| io.write('o hello') }
      File.open('lib/stuff.rb', 'w') { |io| io.write('$foo = 123') }

      site.compile
    end

    # Delete old item
    FileUtils.cd('foo') do
      FileUtils.rm_rf('output/index.html')
    end

    # Check
    with_site(:name => 'foo') do |site|
      outdatedness_checker = site.compiler.send :outdatedness_checker
      rep = site.items.find { |i| i.identifier == '/' }.reps[0]
      assert_equal ::Nanoc3::OutdatednessReasons::NotWritten,
        outdatedness_checker.outdatedness_reason_for(rep)
    end
  end

  def test_outdated_if_item_checksum_is_different
    # Compile once
    with_site(:name => 'foo') do |site|
      File.open('content/index.html', 'w') { |io| io.write('o hello') }
      File.open('content/new.html', 'w') { |io| io.write('o hello too') }
      File.open('lib/stuff.rb', 'w') { |io| io.write('$foo = 123') }

      site.compile
    end

    # Create new item
    FileUtils.cd('foo') do
      File.open('content/new.html', 'w') { |io| io.write('o hello DIFFERENT!!!') }
    end

    # Check
    with_site(:name => 'foo') do |site|
      outdatedness_checker = site.compiler.send :outdatedness_checker
      rep = site.items.find { |i| i.identifier == '/new/' }.reps[0]
      assert_equal ::Nanoc3::OutdatednessReasons::SourceModified,
        outdatedness_checker.outdatedness_reason_for(rep)
    end
  end

  def test_outdated_if_dependent_layout_outdated
    # Compile once
    with_site(:name => 'foo', :compilation_rule_content => 'layout "/default/"', :has_layout => true) do |site|
      File.open('content/index.html', 'w') { |io| io.write('o hello') }
      File.open('layouts/default.html', 'w') { |io| io.write('!!! <%= yield %> !!!') }

      site.compile
    end

    # Change layout
    FileUtils.cd('foo') do
      File.open('layouts/default.html', 'w') { |io| io.write('!!! <%= yield %> !!! different') }
    end

    # Check
    with_site(:name => 'foo') do |site|
      # FIXME ugly fugly hack
      site.compiler.load

      outdatedness_checker = site.compiler.send :outdatedness_checker
      rep = site.items.find { |i| i.identifier == '/' }.reps[0]
      assert_equal ::Nanoc3::OutdatednessReasons::DependenciesOutdated,
        outdatedness_checker.outdatedness_reason_for(rep)
    end
  end

  def test_outdated_if_dependent_item_outdated
    # Compile once
    with_site(:name => 'foo', :compilation_rule_content => 'filter :erb') do |site|
      File.open('content/a.html', 'w') do |io|
        io.write('<%= @items.find { |i| i.identifier == "/b/" }.compiled_content %>')
      end
      File.open('content/b.html', 'w') do |io|
        io.write('stuff')
      end

      site.compile
    end

    # Change item
    FileUtils.cd('foo') do
      File.open('content/b.html', 'w') do |io|
        io.write('stuff different!!!')
      end
    end

    # Check
    with_site(:name => 'foo') do |site|
      # FIXME ugly fugly hack
      site.compiler.load

      outdatedness_checker = site.compiler.send :outdatedness_checker
      rep = site.items.find { |i| i.identifier == '/a/' }.reps[0]
      assert_equal ::Nanoc3::OutdatednessReasons::DependenciesOutdated,
        outdatedness_checker.outdatedness_reason_for(rep)
    end
  end

  def test_outdated_if_dependent_item_outdated_chained
    # Compile once
    with_site(:name => 'foo', :compilation_rule_content => 'filter :erb') do |site|
      File.open('content/a.html', 'w') do |io|
        io.write('<%= @items.find { |i| i.identifier == "/b/" }.compiled_content %> aaa')
      end
      File.open('content/b.html', 'w') do |io|
        io.write('<%= @items.find { |i| i.identifier == "/c/" }.compiled_content %> bbb')
      end
      File.open('content/c.html', 'w') do |io|
        io.write('stuff')
      end

      site.compile
    end

    # Change item
    FileUtils.cd('foo') do
      File.open('content/c.html', 'w') do |io|
        io.write('stuff different!!!')
      end
    end

    # Check
    with_site(:name => 'foo') do |site|
      # FIXME ugly fugly hack
      site.compiler.load

      outdatedness_checker = site.compiler.send :outdatedness_checker
      rep = site.items.find { |i| i.identifier == '/a/' }.reps[0]
      assert_equal ::Nanoc3::OutdatednessReasons::DependenciesOutdated,
        outdatedness_checker.outdatedness_reason_for(rep)
    end
  end

  def test_outdated_if_dependent_item_removed
    # Compile once
    with_site(:name => 'foo', :compilation_rule_content => 'filter :erb') do |site|
      File.open('content/a.html', 'w') do |io|
        io.write('<% @items.select { |i| i.identifier != @item.identifier }.each do |i| %>')
        io.write('  <%= i.compiled_content %>')
        io.write('<% end %>')
      end
      File.open('content/b.html', 'w') do |io|
        io.write('stuff')
      end

      site.compile
    end

    # Delete item
    FileUtils.cd('foo') do
      FileUtils.rm_rf('content/b.html')
    end

    # Check
    with_site(:name => 'foo') do |site|
      # FIXME ugly fugly hack
      site.compiler.load

      outdatedness_checker = site.compiler.send :outdatedness_checker
      rep = site.items.find { |i| i.identifier == '/a/' }.reps[0]
      assert_equal ::Nanoc3::OutdatednessReasons::DependenciesOutdated,
        outdatedness_checker.outdatedness_reason_for(rep)
    end
  end

  def test_outdated_if_dependent_item_added
    # Compile once
    with_site(:name => 'foo', :compilation_rule_content => 'filter :erb') do |site|
      File.open('content/a.html', 'w') do |io|
        io.write('<% @items.select { |i| i.identifier != @item.identifier }.each do |i| %>')
        io.write('  <%= i.compiled_content %>')
        io.write('<% end %>')
      end
      File.open('content/b.html', 'w') do |io|
        io.write('stuff')
      end

      site.compile
    end

    # Add item
    FileUtils.cd('foo') do
      File.open('content/z.html', 'w') do |io|
        io.write('moar stuff')
      end
    end

    # Check
    with_site(:name => 'foo') do |site|
      # FIXME ugly fugly hack
      site.compiler.load

      outdatedness_checker = site.compiler.send :outdatedness_checker
      rep = site.items.find { |i| i.identifier == '/a/' }.reps[0]
      assert_equal ::Nanoc3::OutdatednessReasons::DependenciesOutdated,
        outdatedness_checker.outdatedness_reason_for(rep)
    end
  end

  # TODO make sure outdatedness of non-outdated items is correct

  def test_outdated_if_code_snippets_outdated
    # Compile once
    with_site(:name => 'foo') do |site|
      File.open('content/index.html', 'w') { |io| io.write('o hello') }

      site.compile
    end

    # Change code
    FileUtils.cd('foo') do
      File.open('lib/moo.rb', 'w') { |io| io.write('def moo ; puts "moo" ; end') }
    end

    # Check
    with_site(:name => 'foo') do |site|
      outdatedness_checker = site.compiler.send :outdatedness_checker
      rep = site.items.find { |i| i.identifier == '/' }.reps[0]
      assert_equal ::Nanoc3::OutdatednessReasons::CodeSnippetsModified,
        outdatedness_checker.outdatedness_reason_for(rep)
    end
  end

  def test_outdated_if_config_outdated
    # Compile once
    with_site(:name => 'foo') do |site|
      File.open('content/index.html', 'w') { |io| io.write('o hello') }

      site.compile
    end

    # Change code
    FileUtils.cd('foo') do
      File.open('config.yaml', 'w') { |io| io.write('awesome: true') }
    end

    # Check
    with_site(:name => 'foo') do |site|
      outdatedness_checker = site.compiler.send :outdatedness_checker
      rep = site.items.find { |i| i.identifier == '/' }.reps[0]
      assert_equal ::Nanoc3::OutdatednessReasons::ConfigurationModified,
        outdatedness_checker.outdatedness_reason_for(rep)
    end
  end

  def test_not_outdated_if_irrelevant_rule_modified
    # Compile once
    with_site(:name => 'foo') do |site|
      File.open('content/index.html', 'w') { |io| io.write('o hello') }

      site.compile
    end

    # Change code
    FileUtils.cd('foo') do
      File.open('Rules', 'a') { |io| io.write('layout "/moo/", :haml') }
    end

    # Check
    with_site(:name => 'foo') do |site|
      outdatedness_checker = site.compiler.send :outdatedness_checker
      rep = site.items.find { |i| i.identifier == '/' }.reps[0]
      assert_nil outdatedness_checker.outdatedness_reason_for(rep)
    end
  end

  def test_outdated_if_relevant_rule_modified
    # Create site
    with_site(:name => 'foo') do |site|
      File.open('content/index.html', 'w') { |io| io.write('o hello') }
      File.open('Rules', 'w') do |io|
        io.write("compile '/' do\n")
        io.write("  filter :erb\n")
        io.write("end\n")
        io.write("\n")
        io.write("route '/' do\n")
        io.write("  '/index.html'\n")
        io.write("end\n")
      end
    end

    # Compile once
    FileUtils.cd('foo') do
      site = Nanoc3::Site.new('.')
      site.compile
    end

    # Modify rules
    FileUtils.cd('foo') do
      File.open('Rules', 'w') do |io|
        io.write("compile '/' do\n")
        io.write("end\n")
        io.write("\n")
        io.write("route '/' do\n")
        io.write("  '/index.html'\n")
        io.write("end\n")
      end
    end

    # Check
    FileUtils.cd('foo') do
      site = Nanoc3::Site.new('.')
      outdatedness_checker = site.compiler.send :outdatedness_checker
      rep = site.items.find { |i| i.identifier == '/' }.reps[0]
      assert_equal ::Nanoc3::OutdatednessReasons::RulesModified,
        outdatedness_checker.outdatedness_reason_for(rep)
    end
  end

  def test_items_in_rules_should_not_cause_outdatedness
    # Create site
    with_site(:name => 'foo') do |site|
      File.open('content/index.html', 'w') { |io| io.write('o hello') }
      File.open('Rules', 'w') do |io|
        io.write("compile '/' do\n")
        io.write("  filter :erb, :stuff => @items\n")
        io.write("end\n")
        io.write("\n")
        io.write("route '/' do\n")
        io.write("  '/index.html'\n")
        io.write("end\n")
      end
    end

    # Compile
    FileUtils.cd('foo') do
      site = Nanoc3::Site.new('.')
      site.compile
    end

    # Assert not outdated
    FileUtils.cd('foo') do
      site = Nanoc3::Site.new('.')
      outdatedness_checker = site.compiler.outdatedness_checker
      site.items.each do |item|
        refute outdatedness_checker.outdated?(item), "item should not be outdated"
      end
    end
  end

end