# This file is part of Libusb for Ruby.
#
# Libusb for Ruby is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Libusb for Ruby is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Libusb for Ruby.  If not, see <http://www.gnu.org/licenses/>.

require "minitest/autorun"
require "libusb"

class TestLibusbContext < Minitest::Test
  def setup
    @c = LIBUSB::Context.new
  end

  def teardown
    @c.exit if @c
  end

  def test_set_option
    @c.set_option LIBUSB::OPTION_LOG_LEVEL, LIBUSB::LOG_LEVEL_NONE
    @c.set_option LIBUSB::OPTION_LOG_LEVEL, LIBUSB::LOG_LEVEL_ERROR
    @c.set_option LIBUSB::OPTION_LOG_LEVEL, LIBUSB::LOG_LEVEL_WARNING
    @c.set_option LIBUSB::OPTION_LOG_LEVEL, LIBUSB::LOG_LEVEL_INFO
    @c.set_option LIBUSB::OPTION_LOG_LEVEL, LIBUSB::LOG_LEVEL_DEBUG
    @c.set_option :OPTION_LOG_LEVEL, :LOG_LEVEL_NONE
  end

  def test_set_debug
    @c.debug = 4
    @c.debug = 0
  end

  def test_left_references
    @test_devs = @c.devices
    assert_raises(LIBUSB::RemainingReferencesError) do
      @c.exit
    end
    @c = nil
  end

  def test_double_exit
    @c.exit
  end

  def test_log_callback
    skip "only supported on Linux" unless RUBY_PLATFORM=~/linux/
    skip "libusb version older than 1.0.27" if Gem::Version.new(LIBUSB.version) < Gem::Version.new("1.0.27")

    LIBUSB.set_options OPTION_LOG_CB: [nil], OPTION_LOG_LEVEL: LIBUSB::LOG_LEVEL_NONE
    begin
      called = Hash.new { |h, k| h[k] = [] }
      LIBUSB.set_options OPTION_LOG_CB: proc{|*a| called[:global] << a }, OPTION_LOG_LEVEL: LIBUSB::LOG_LEVEL_DEBUG

      c = LIBUSB::Context.new OPTION_LOG_CB: proc{|*a| called[:ctx1] << a }, OPTION_NO_DEVICE_DISCOVERY: nil
      c.devices
      c.set_log_cb(LIBUSB::LOG_CB_CONTEXT){|*a| called[:ctx2] << a }
      c.devices

      #pp called
      assert_nil called[:global][0][0]
      assert_equal :LOG_LEVEL_DEBUG, called[:global][0][1], called[:global][0][2]
      assert_match(/libusb_init_context/, called[:global].join)
      assert_match(/no device discovery/, called[:global].join)

      assert_operator called[:ctx1].size, :>, called[:ctx2].size
      assert_equal c, called[:ctx1][-1][0]
      assert_equal :LOG_LEVEL_DEBUG, called[:ctx1][-1][1]
      assert_match(/libusb_get_device_list/, called[:ctx1][-1][2])
      assert_match(/no device discovery/, called[:ctx1].join)

      assert_equal c, called[:ctx2][-1][0]
      assert_equal :LOG_LEVEL_DEBUG, called[:ctx2][-1][1]
      assert_match(/libusb_get_device_list/, called[:ctx2][-1][2])

    ensure
      LIBUSB.set_options OPTION_LOG_CB: [nil], OPTION_LOG_LEVEL: LIBUSB::LOG_LEVEL_NONE
    end
  end
end