# Copyright 2015 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import logging
import threading
import time

from autotest_lib.client.common_lib.cros.network import ping_runner
from autotest_lib.client.common_lib.cros.network import xmlrpc_datatypes
from autotest_lib.server.cros.network import netperf_runner
from autotest_lib.server.cros.network import netperf_session
from autotest_lib.server.cros.network import wifi_cell_test_base

from autotest_lib.server.cros.bluetooth.bluetooth_adapter_quick_tests import \
     BluetoothAdapterQuickTests
from autotest_lib.server.cros.bluetooth.bluetooth_adapter_audio_tests import (
        BluetoothAdapterAudioTests)
from autotest_lib.client.cros.bluetooth.bluetooth_audio_test_data import A2DP


class network_WiFi_BluetoothStreamPerf(wifi_cell_test_base.WiFiCellTestBase,
                                       BluetoothAdapterQuickTests,
                                       BluetoothAdapterAudioTests):
    """Test maximal achievable bandwidth on several channels per band.

    Conducts a performance test for a set of specified router configurations
    and reports results as keyval pairs.

    """

    test_wrapper = BluetoothAdapterQuickTests.quick_test_test_decorator
    batch_wrapper = BluetoothAdapterQuickTests.quick_test_batch_decorator

    version = 1

    NETPERF_CONFIGS = [
            netperf_runner.NetperfConfig(
                       netperf_runner.NetperfConfig.TEST_TYPE_TCP_STREAM),
            netperf_runner.NetperfConfig(
                       netperf_runner.NetperfConfig.TEST_TYPE_TCP_MAERTS),
            netperf_runner.NetperfConfig(
                       netperf_runner.NetperfConfig.TEST_TYPE_UDP_STREAM),
            netperf_runner.NetperfConfig(
                       netperf_runner.NetperfConfig.TEST_TYPE_UDP_MAERTS),
    ]


    def parse_additional_arguments(self, commandline_args, additional_params):
        """Hook into super class to take control files parameters.

        @param commandline_args dict of parsed parameters from the autotest.
        @param additional_params list of HostapConfig objects.

        """
        self._ap_configs = additional_params


    def test_one(self, session, config, ap_config_tag, bt_tag):
        """Run one iteration of wifi testing.

        @param session NetperfSession session
        @param config NetperfConfig config
        @param ap_config_tag string for AP configuration
        @param bt_tag string for BT operation

        """
        get_ping_config = lambda period: ping_runner.PingConfig(
                self.context.get_wifi_addr(), interval=1, count=period)

        logging.info('testing config %s, ap_config %s, BT:%s',
                     config.tag, ap_config_tag, bt_tag)
        test_str = '_'.join([ap_config_tag, bt_tag])
        time.sleep(1)

        # Record the signal level.
        signal_level = self.context.client.wifi_signal_level
        signal_description = '_'.join(['signal', test_str])
        self.write_perf_keyval({signal_description: signal_level})

        # Run netperf and log the results.
        results = session.run(config)
        if not results:
            logging.error('Failed to take measurement for %s',
                          config.tag)
            return
        values = [result.throughput for result in results]
        self.output_perf_value(config.tag + '_' + bt_tag, values, units='Mbps',
                               higher_is_better=True,
                               graph=ap_config_tag)
        result = netperf_runner.NetperfResult.from_samples(results)
        self.write_perf_keyval(result.get_keyval(
            prefix='_'.join([config.tag, test_str])))

        # Log the drop in throughput compared with the 'BT_disconnected'
        # baseline.  Only positive values are valid.  Report the drop as a
        # whole integer percentage of (base_through-through)/base_through.
        if bt_tag == 'BT_disconnected':
            self.base_through = result.throughput
        elif self.base_through > 0:
            drop = int( (self.base_through - result.throughput) * 100 /
                        self.base_through)
            self.output_perf_value(config.tag + '_' + bt_tag + '_drop',
                                   drop, units='percent_drop',
                                   higher_is_better=False,
                                   graph=ap_config_tag + '_drop')
            self.write_perf_keyval({'_'.join([config.tag, test_str, 'drop']):
                                   drop})
            logging.info('logging drop value as %d%%', drop)

        # Test latency with ping.
        result_ping = self.context.client.ping(get_ping_config(3))
        self.write_perf_keyval(
            { '_'.join(['ping', test_str]): result_ping.avg_latency })
        logging.info('Ping statistics with %s: %r', bt_tag, result_ping)

    def pair_audio_device(self, device):
        """Pair an audio device pre-test to simplify later re-connection"""
        self.test_device_set_discoverable(device, True)
        self.test_discover_device(device.address)
        self.test_pairing(device.address, device.pin, trusted=True)
        device.SetTrustedByRemoteAddress(self.bluetooth_facade.address)
        self.test_disconnection_by_adapter(device.address)

    def do_audio_test(self, device):
        """Run the body of the audio test"""
        self.test_a2dp_sinewaves(device, A2DP, 60)

    @test_wrapper('Coex tests', devices={'BLUETOOTH_AUDIO': 1})
    def coex_test(self):
        """Test body."""
        start_time = time.time()

        device = self.devices['BLUETOOTH_AUDIO'][0]
        self.initialize_bluetooth_audio(device, A2DP)
        self.pair_audio_device(device)

        for ap_config in self._ap_configs:
            # Set up the router and associate the client with it.
            self.context.configure(ap_config)
            assoc_params = xmlrpc_datatypes.AssociationParameters(
                    ssid=self.context.router.get_ssid(),
                    security_config=ap_config.security_config)
            self.context.assert_connect_wifi(assoc_params)
            session = netperf_session.NetperfSession(self.context.client,
                                                     self.context.router)
            session.MEASUREMENT_MAX_SAMPLES = 6.


            # Warmup the wifi path and measure signal.
            session.warmup_stations()
            ap_config_tag = ap_config.perf_loggable_description

            for config in self.NETPERF_CONFIGS:
                self.base_through = 0
                self.test_one(session, config, ap_config_tag, 'BT_disconnected')

                self.test_connection_by_device(device)
                self.test_one(session, config, ap_config_tag,
                              'BT_connected_but_not_streaming')

                # Start playing audio in background
                audio_thread = threading.Thread(target=self.do_audio_test,
                                                args=(device, ))
                audio_thread.start()
                self.test_one(session, config, ap_config_tag,
                              'BT_streaming_audiofile')

                # Wait for audio thread to complete
                audio_thread.join()
                self.test_disconnection_by_adapter(device.address)
                self.test_one(session, config, ap_config_tag,
                              'BT_disconnected_again')

            # Clean up router and client state for the next run.
            self.context.client.shill.disconnect(self.context.router.get_ssid())
            self.context.router.deconfig()

        self.cleanup_bluetooth_audio(device, A2DP)
        end_time = time.time()
        logging.info('Running time %0.1f seconds.', end_time - start_time)

    @batch_wrapper('Coex batch')
    def coex_health_batch_run(self, num_iterations=1, test_name=None):
        """Run the bluetooth coex health test batch or a specific given test.

        @param num_iterations: how many iterations to run
        @param test_name: specific test to run otherwise None to run the
                whole batch
        """
        self.coex_test()

    def run_once(self, host, test_name=None):
        self.host = host

        self.quick_test_init(host, use_btpeer=True)
        self.coex_health_batch_run(test_name=test_name)
        self.quick_test_cleanup()