# encoding: utf-8

require 'test/helper'

class Nanoc3::DependencyTrackerTest < MiniTest::Unit::TestCase

  include Nanoc3::TestHelpers

  def test_initialize
    # Mock items
    items = [ mock, mock ]

    # Create
    tracker = Nanoc3::DependencyTracker.new(items)

    # Verify no dependencies yet
    assert_equal [], tracker.dependencies_for(items[0])
    assert_equal [], tracker.dependencies_for(items[1])
  end

  def test_record_dependency
    # Mock items
    items = [ mock, mock ]

    # Create
    tracker = Nanoc3::DependencyTracker.new(items)

    # Record some dependencies
    tracker.record_dependency(items[0], items[1])

    # Verify dependencies
    assert_equal [ items[1] ], tracker.dependencies_for(items[0])
  end

  def test_start_and_stop
    # Mock items
    items = [ mock, mock ]

    # Create
    tracker = Nanoc3::DependencyTracker.new(items)

    # Start, do something and stop
    tracker.start
    Nanoc3::NotificationCenter.post(:visit_started, items[0])
    Nanoc3::NotificationCenter.post(:visit_started, items[1])
    Nanoc3::NotificationCenter.post(:visit_ended,   items[1])
    Nanoc3::NotificationCenter.post(:visit_ended,   items[0])
    tracker.stop

    # Verify dependencies
    assert_equal [ items[1] ], tracker.dependencies_for(items[0])
    assert_equal [],           tracker.dependencies_for(items[1])
  end

  def test_store_graph_and_load_graph_simple
    # Mock items
    items = [ mock, mock, mock, mock ]
    items[0].stubs(:path).returns('/aaa/')
    items[1].stubs(:path).returns('/bbb/')
    items[2].stubs(:path).returns('/ccc/')
    items[3].stubs(:path).returns('/ddd/')

    # Create
    tracker = Nanoc3::DependencyTracker.new(items)

    # Record some dependencies
    tracker.record_dependency(items[0], items[1])
    tracker.record_dependency(items[1], items[2])
    tracker.record_dependency(items[1], items[3])

    # Store
    tracker.store_graph
    assert File.file?(tracker.filename)

    # Re-create
    tracker = Nanoc3::DependencyTracker.new(items)

    # Load
    tracker.load_graph

    # Check loaded graph
    assert_equal [ items[1] ],           tracker.dependencies_for(items[0])
    assert_equal [ items[2], items[3] ], tracker.dependencies_for(items[1])
    assert_equal [],                     tracker.dependencies_for(items[2])
    assert_equal [],                     tracker.dependencies_for(items[3])
  end

  def test_store_graph_with_custom_filename
    # Mock items
    items = [ mock, mock, mock, mock ]
    items[0].stubs(:path).returns('/aaa/')
    items[1].stubs(:path).returns('/bbb/')
    items[2].stubs(:path).returns('/ccc/')
    items[3].stubs(:path).returns('/ddd/')

    # Create
    tracker = Nanoc3::DependencyTracker.new(items)
    tracker.filename = 'tmp/bob/iguana/bits'

    # Record some dependencies
    tracker.record_dependency(items[0], items[1])
    tracker.record_dependency(items[1], items[2])
    tracker.record_dependency(items[1], items[3])

    # Store
    tracker.store_graph
    assert File.file?(tracker.filename)
    assert File.file?('tmp/bob/iguana/bits')
  end

  def test_store_graph_and_load_graph_with_removed_items
  end

  def test_store_graph_and_load_graph_with_added_items
  end

  def test_store_graph_and_load_graph_with_added_and_removed_items
  end

  def test_item_with_path
    # Mock items
    items = [ mock, mock, mock, mock ]
    items[0].stubs(:path).returns('/aaa/')
    items[1].stubs(:path).returns('/bbb/')
    items[2].stubs(:path).returns('/ccc/')
    items[3].stubs(:path).returns('/ddd/')

    # Create
    tracker = Nanoc3::DependencyTracker.new(items)

    # Test
    assert_equal items[0], tracker.send(:item_with_path, '/aaa/')
    assert_equal items[1], tracker.send(:item_with_path, '/bbb/')
    assert_equal items[2], tracker.send(:item_with_path, '/ccc/')
    assert_equal items[3], tracker.send(:item_with_path, '/ddd/')
    assert_equal nil,      tracker.send(:item_with_path, '/123/')
  end

end