#!/usr/bin/env python3
#
#   Copyright 2019 - The Android Open Source Project
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.

import logging
import os
from builtins import open
import json
import signal
import socket
import subprocess
import time

from acts import context, error, tracelogger
from acts.controllers.adb import AdbProxy

import grpc

ANDROID_BUILD_TOP = os.environ.get('ANDROID_BUILD_TOP')
ANDROID_HOST_OUT = os.environ.get('ANDROID_HOST_OUT')
ANDROID_PRODUCT_OUT = os.environ.get('ANDROID_PRODUCT_OUT')
WAIT_CHANNEL_READY_TIMEOUT = 10


def replace_vars(string, config):
    serial_number = config.get("serial_number")
    if serial_number is None:
        serial_number = ""
    rootcanal_port = config.get("rootcanal_port")
    if rootcanal_port is None:
        rootcanal_port = ""
    if serial_number == "DUT" or serial_number == "CERT":
        raise Exception("Did you forget to configure the serial number?")
    return string.replace("$ANDROID_HOST_OUT", ANDROID_HOST_OUT) \
                 .replace("$(grpc_port)", config.get("grpc_port")) \
                 .replace("$(grpc_root_server_port)", config.get("grpc_root_server_port")) \
                 .replace("$(rootcanal_port)", rootcanal_port) \
                 .replace("$(signal_port)", config.get("signal_port")) \
                 .replace("$(serial_number)", serial_number)


class GdDeviceBase:

    def __init__(self, grpc_port, grpc_root_server_port, signal_port, cmd,
                 label, type_identifier, serial_number):
        self.label = label if label is not None else grpc_port
        # logging.log_path only exists when this is used in an ACTS test run.
        self.log_path_base = context.get_current_context().get_full_output_path(
        )
        self.log = tracelogger.TraceLogger(
            GdDeviceBaseLoggerAdapter(logging.getLogger(), {
                'device': label,
                'type_identifier': type_identifier
            }))

        backing_process_logpath = os.path.join(
            self.log_path_base,
            '%s_%s_backing_logs.txt' % (type_identifier, label))
        self.backing_process_logs = open(backing_process_logpath, 'w')

        cmd_str = json.dumps(cmd)
        if "--btsnoop=" not in cmd_str:
            btsnoop_path = os.path.join(self.log_path_base,
                                        '%s_btsnoop_hci.log' % label)
            cmd.append("--btsnoop=" + btsnoop_path)

        self.serial_number = serial_number
        if self.serial_number:
            self.ad = AdbProxy(serial_number)
            self.ad.shell("date " + time.strftime("%m%d%H%M%Y.%S"))
            self.ad.tcp_forward(int(grpc_port), int(grpc_port))
            self.ad.tcp_forward(
                int(grpc_root_server_port), int(grpc_root_server_port))
            self.ad.reverse("tcp:%s tcp:%s" % (signal_port, signal_port))
            self.ad.push(
                os.path.join(ANDROID_PRODUCT_OUT,
                             "system/bin/bluetooth_stack_with_facade"),
                "system/bin")
            self.ad.push(
                os.path.join(ANDROID_PRODUCT_OUT,
                             "system/lib64/libbluetooth_gd.so"), "system/lib64")
            self.ad.push(
                os.path.join(ANDROID_PRODUCT_OUT,
                             "system/lib64/libgrpc++_unsecure.so"),
                "system/lib64")
            self.ad.shell("logcat -c")
            self.ad.shell("rm /data/misc/bluetooth/logs/btsnoop_hci.log")
            self.ad.shell("svc bluetooth disable")

        tester_signal_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        tester_signal_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR,
                                        1)
        socket_address = ('localhost', int(signal_port))
        tester_signal_socket.bind(socket_address)
        tester_signal_socket.listen(1)

        self.backing_process = subprocess.Popen(
            cmd,
            cwd=ANDROID_BUILD_TOP,
            env=os.environ.copy(),
            stdout=self.backing_process_logs,
            stderr=self.backing_process_logs)
        tester_signal_socket.accept()
        tester_signal_socket.close()

        self.grpc_root_server_channel = grpc.insecure_channel(
            "localhost:" + grpc_root_server_port)
        self.grpc_port = int(grpc_port)
        self.grpc_channel = grpc.insecure_channel("localhost:" + grpc_port)

    def clean_up(self):
        self.grpc_channel.close()
        self.grpc_root_server_channel.close()
        stop_signal = signal.SIGINT
        self.backing_process.send_signal(stop_signal)
        backing_process_return_code = self.backing_process.wait()
        self.backing_process_logs.close()
        if backing_process_return_code not in [-stop_signal, 0]:
            logging.error("backing process %s stopped with code: %d" %
                          (self.label, backing_process_return_code))

        if self.serial_number:
            self.ad.shell("logcat -d -f /data/misc/bluetooth/logs/system_log")
            self.ad.pull(
                "/data/misc/bluetooth/logs/btsnoop_hci.log %s" % os.path.join(
                    self.log_path_base, "%s_btsnoop_hci.log" % self.label))
            self.ad.pull(
                "/data/misc/bluetooth/logs/system_log %s" % os.path.join(
                    self.log_path_base, "%s_system_log" % self.label))

    def wait_channel_ready(self):
        future = grpc.channel_ready_future(self.grpc_channel)
        try:
            future.result(timeout=WAIT_CHANNEL_READY_TIMEOUT)
        except grpc.FutureTimeoutError:
            logging.error("wait channel ready timeout")


class GdDeviceBaseLoggerAdapter(logging.LoggerAdapter):

    def process(self, msg, kwargs):
        msg = "[%s|%s] %s" % (self.extra["type_identifier"],
                              self.extra["device"], msg)
        return (msg, kwargs)


class GdDeviceConfigError(Exception):
    """Raised when GdDevice configs are malformatted."""


class GdDeviceError(error.ActsError):
    """Raised when there is an error in GdDevice."""