#!/usr/bin/env python

##############################################################################
# Copyright 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the
# LICENSE file in the root directory of this source tree.
##############################################################################

from __future__ import absolute_import, division, print_function, unicode_literals

import argparse
import copy
import json
import os
import shutil
import sys
import tempfile
import threading
import time

from benchmarks.benchmarks import BenchmarkCollector
from driver.benchmark_driver import runOneBenchmark
from frameworks.frameworks import getFrameworks
from platforms.platforms import getPlatforms
from reporters.reporters import getReporters
from utils.custom_logger import getLogger
from utils.utilities import (
    getRunKilled,
    getRunStatus,
    getRunTimeout,
    KILLED_FLAG as RUN_KILLED,
    parse_kwarg,
    setRunStatus,
    TIMEOUT_FLAG as RUN_TIMEOUT,
)

parser = argparse.ArgumentParser()
parser.add_argument(
    "--android_dir",
    default="/data/local/tmp/",
    help="The directory in the android device all files are pushed to.",
)
# for backward compatible purpose
parser.add_argument("--backend", help="Specify the backend the test runs on.")
parser.add_argument(
    "-b",
    "--benchmark_file",
    required=True,
    help="Specify the json file for the benchmark or a number of benchmarks",
)
parser.add_argument(
    "--command_args",
    help="Specify optional command arguments that would go with the "
    "main benchmark command",
)
parser.add_argument(
    "--cooldown",
    default=1.0,
    type=float,
    help="Specify the time interval in seconds between two test runs.",
)
parser.add_argument(
    "--debug",
    action="store_true",
    help="Debug mode to retain all the running binaries and models.",
)
parser.add_argument("--device", help="The single device to run this benchmark on")
parser.add_argument(
    "-d",
    "--devices",
    help="Specify the devices to run the benchmark, in a comma separated "
    "list. The value is the device or device_hash field of the meta info.",
)
parser.add_argument(
    "--env",
    help="environment variables passed to runtime binary.",
    nargs="*",
    type=parse_kwarg,
    default=[],
)
parser.add_argument(
    "--excluded_devices",
    help="Specify the devices that skip the benchmark, in a comma separated "
    "list. The value is the device or device_hash field of the meta info.",
)
parser.add_argument(
    "--framework",
    required=True,
    default="pytorch",
    help="Specify the framework to benchmark on.",
)
parser.add_argument(
    "--info",
    required=True,
    help="The json serialized options describing the control and treatment.",
)
parser.add_argument(
    "--ios_dir",
    default="/tmp",
    help="The directory in the ios device all files are pushed to.",
)
parser.add_argument(
    "--local_reporter",
    help="Save the result to a directory specified by this argument.",
)
parser.add_argument(
    "--monsoon_map", help="Map the phone hash to the monsoon serial number."
)
parser.add_argument(
    "--simple_local_reporter",
    help="Same as local reporter, but the directory hierarchy is reduced.",
)
parser.add_argument(
    "--model_cache",
    required=True,
    help="The local directory containing the cached models. It should not "
    "be part of a git directory.",
)
parser.add_argument(
    "-p",
    "--platform",
    required=True,
    help="Specify the platform to benchmark on. Use this flag if the framework"
    " needs special compilation scripts. The scripts are called build.sh "
    "saved in "
    + os.path.join("specifications", "frameworks", "<framework>", "<platform>")
    + " directory",
)
parser.add_argument("--platform_sig", help="Specify the platform signature")
parser.add_argument("--program", help="The program to run on the platform.")
parser.add_argument(
    "--reboot",
    action="store_true",
    help="Tries to reboot the devices before launching benchmarks for one " "commit.",
)
parser.add_argument(
    "--regressed_types",
    help="A json string that encodes the types of the regressed tests.",
)
parser.add_argument(
    "--remote_reporter",
    help="Save the result to a remote server. "
    "The style is <domain_name>/<endpoint>|<category>",
)
parser.add_argument(
    "--remote_access_token", help="The access token to access the remote server"
)
parser.add_argument(
    "--root_model_dir",
    help="The root model directory if the meta data of the model uses "
    "relative directory, i.e. the location field starts with //",
)
parser.add_argument(
    "--run_type",
    default="benchmark",
    choices=["benchmark", "verify", "regress"],
    help="The type of the current run. The allowed values are: "
    "benchmark, the normal benchmark run."
    "verify, the benchmark is re-run to confirm a suspicious regression."
    "regress, the regression is confirmed.",
)
parser.add_argument(
    "--screen_reporter",
    action="store_true",
    help="Display the summary of the benchmark result on screen.",
)
parser.add_argument(
    "--simple_screen_reporter",
    action="store_true",
    help="Display the result on screen with no post processing.",
)
parser.add_argument(
    "--set_freq",
    help="On rooted android phones, set the frequency of the cores. "
    "The supported values are: "
    "max: set all cores to the maximum frquency. "
    "min: set all cores to the minimum frequency. "
    "mid: set all cores to the median frequency. ",
)
parser.add_argument(
    "--shared_libs",
    help="Pass the shared libs that the framework depends on, "
    "in a comma separated list.",
)
parser.add_argument(
    "--string_map",
    help="A json string mapping tokens to replacement strings. "
    "The tokens, surrended by {}, when appearing in the test fields of "
    "the json file, are to be replaced with the mapped values.",
)
parser.add_argument(
    "--timeout",
    default=300,
    type=float,
    help="Specify a timeout running the test on the platforms. "
    "The timeout value needs to be large enough so that the low end devices "
    "can safely finish the execution in normal conditions. ",
)
parser.add_argument(
    "--user_identifier",
    help="User can specify an identifier and that will be passed to the "
    "output so that the result can be easily identified.",
)
# for backward compabile purpose
parser.add_argument(
    "--wipe_cache",
    default=False,
    help="Specify whether to evict cache or not before running",
)
parser.add_argument(
    "--hash_platform_mapping",
    help="Specify the devices hash platform mapping json file.",
)
parser.add_argument(
    "--device_name_mapping",
    default=None,
    help="Specify device to product name mapping json file.",
)
# Avoid the prefix user so that it doesn't collide with --user_identifier
parser.add_argument(
    "--user_string",
    help="Specify the user running the test (to be passed to the remote reporter).",
)


class BenchmarkDriver(object):
    def __init__(self, **kwargs):
        setRunStatus(0, overwrite=True)
        self.status = 0
        raw_args = kwargs.get("raw_args", None)
        self.usb_controller = kwargs.get("usb_controller")
        self.args, self.unknowns = parser.parse_known_args(raw_args)
        self._lock = threading.Lock()

    def runBenchmark(self, info, platform, benchmarks):
        if self.args.reboot:
            platform.rebootDevice()
        for idx in range(len(benchmarks)):
            tempdir = tempfile.mkdtemp(
                prefix="_".join(["aibench", str(self.args.user_identifier), ""])
            )
            # we need to get a different framework instance per thread
            # will consolidate later. For now create a new framework
            frameworks = getFrameworks()
            framework = frameworks[self.args.framework](tempdir, self.args)
            reporters = getReporters(self.args)

            benchmark = benchmarks[idx]
            # check the framework matches
            if "model" in benchmark and "framework" in benchmark["model"]:
                assert benchmark["model"]["framework"] == self.args.framework, (
                    "Framework specified in the json file "
                    "{} ".format(benchmark["model"]["framework"])
                    + "does not match the command line argument "
                    "{}".format(self.args.framework)
                )
            if self.args.debug:
                for test in benchmark["tests"]:
                    test["log_output"] = True
            if self.args.env:
                for test in benchmark["tests"]:
                    cmd_env = dict(self.args.env)
                    if "env" in test:
                        cmd_env.update(test["env"])
                    test["env"] = cmd_env

            b = copy.deepcopy(benchmark)
            i = copy.deepcopy(info)
            status = runOneBenchmark(
                i,
                b,
                framework,
                platform,
                self.args.platform,
                reporters,
                self._lock,
                self.args.cooldown,
                self.args.user_identifier,
                self.args.local_reporter,
            )
            self.status = self.status | status
            if idx != len(benchmarks) - 1:
                # cool down period between multiple benchmark runs
                cooldown = self.args.cooldown
                if "model" in benchmark and "cooldown" in benchmark["model"]:
                    cooldown = float(benchmark["model"]["cooldown"])
                time.sleep(cooldown)
            if not self.args.debug:
                shutil.rmtree(tempdir, True)
                for test in benchmark["tests"]:
                    if "preprocess" in test and "files" in test["preprocess"]:
                        for f in test["preprocess"]["files"].values():
                            shutil.rmtree(f["location"], True)

    def run(self):
        tempdir = tempfile.mkdtemp(
            prefix="_".join(["aibench", str(self.args.user_identifier), ""])
        )
        getLogger().info("Temp directory: {}".format(tempdir))
        info = self._getInfo()
        frameworks = getFrameworks()
        assert (
            self.args.framework in frameworks
        ), "Framework {} is not supported".format(self.args.framework)
        framework = frameworks[self.args.framework](tempdir, self.args)
        bcollector = BenchmarkCollector(
            framework, self.args.model_cache, args=self.args
        )
        benchmarks = bcollector.collectBenchmarks(
            info, self.args.benchmark_file, self.args.user_identifier
        )
        platforms = getPlatforms(self.args, tempdir, self.usb_controller)
        threads = []
        for platform in platforms:
            t = threading.Thread(
                target=self.runBenchmark, args=(info, platform, benchmarks)
            )
            t.start()
            threads.append(t)
        for t in threads:
            t.join()

        if not self.args.debug:
            shutil.rmtree(tempdir, True)

        status = self.status | getRunStatus()
        if getRunKilled():
            status_str = "killed"
        elif getRunTimeout():
            status_str = "timeout"
        elif status == 0:
            status_str = "success"
        elif status == 1:
            status_str = "user error"
        elif status == 2:
            status_str = "harness error"
        else:
            status_str = "user and harness error"
        getLogger().info(" ======= {} =======".format(status_str))
        if getRunKilled():
            return RUN_KILLED
        if getRunTimeout():
            return RUN_TIMEOUT
        return status

    def _getInfo(self):
        info = json.loads(self.args.info)
        info["run_type"] = "benchmark"
        if "meta" not in info:
            info["meta"] = {}
        info["meta"]["command_args"] = (
            self.args.command_args if self.args.command_args else ""
        )

        # for backward compatible purpose
        if self.args.backend:
            info["meta"]["command_args"] += " --backend {}".format(self.args.backend)
        if self.args.wipe_cache:
            info["meta"]["command_args"] += " --wipe_cache {}".format(
                self.args.wipe_cache
            )
        if self.args.user_string:
            info["user"] = self.args.user_string

        return info


if __name__ == "__main__":
    app = BenchmarkDriver()
    status = app.run()
    sys.exit(status)
