#!/usr/bin/env python2.7

# Copyright 2015 gRPC authors.
#
# 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.

from __future__ import print_function
import json
import pipes
import shutil
import sys
import os
import yaml

run_tests_root = os.path.abspath(os.path.join(
    os.path.dirname(sys.argv[0]),
    '../../../tools/run_tests'))
sys.path.append(run_tests_root)

import performance.scenario_config as scenario_config

configs_from_yaml = yaml.load(open(os.path.join(os.path.dirname(sys.argv[0]), '../../../build.yaml')))['configs'].keys()

def mutate_scenario(scenario_json, is_tsan):
  # tweak parameters to get fast test times
  scenario_json = dict(scenario_json)
  scenario_json['warmup_seconds'] = 0
  scenario_json['benchmark_seconds'] = 1
  outstanding_rpcs_divisor = 1
  if is_tsan and (
      scenario_json['client_config']['client_type'] == 'SYNC_CLIENT' or
      scenario_json['server_config']['server_type'] == 'SYNC_SERVER'):
    outstanding_rpcs_divisor = 10
  scenario_json['client_config']['outstanding_rpcs_per_channel'] = max(1,
      int(scenario_json['client_config']['outstanding_rpcs_per_channel'] / outstanding_rpcs_divisor))
  return scenario_json

def _scenario_json_string(scenario_json, is_tsan):
  scenarios_json = {'scenarios': [scenario_config.remove_nonproto_fields(mutate_scenario(scenario_json, is_tsan))]}
  return json.dumps(scenarios_json)

def threads_required(scenario_json, where, is_tsan):
  scenario_json = mutate_scenario(scenario_json, is_tsan)
  if scenario_json['%s_config' % where]['%s_type' % where] == 'ASYNC_%s' % where.upper():
    return scenario_json['%s_config' % where].get('async_%s_threads' % where, 0)
  return scenario_json['client_config']['outstanding_rpcs_per_channel'] * scenario_json['client_config']['client_channels']

def guess_cpu(scenario_json, is_tsan):
  client = threads_required(scenario_json, 'client', is_tsan)
  server = threads_required(scenario_json, 'server', is_tsan)
  # make an arbitrary guess if set to auto-detect
  # about the size of the jenkins instances we have for unit tests
  if client == 0 or server == 0: return 'capacity'
  return (scenario_json['num_clients'] * client +
          scenario_json['num_servers'] * server)

def maybe_exclude_gcov(scenario_json):
  if scenario_json['client_config']['client_channels'] > 100:
    return ['gcov']
  return []

def generate_yaml():
  return {
    'tests': [
      {
        'name': 'json_run_localhost',
        'shortname': 'json_run_localhost:%s' % scenario_json['name'],
        'args': ['--scenarios_json', _scenario_json_string(scenario_json, False)],
        'ci_platforms': ['linux'],
        'platforms': ['linux'],
        'flaky': False,
        'language': 'c++',
        'boringssl': True,
        'defaults': 'boringssl',
        'cpu_cost': guess_cpu(scenario_json, False),
        'exclude_configs': ['tsan', 'asan'] + maybe_exclude_gcov(scenario_json),
        'timeout_seconds': 2*60,
        'excluded_poll_engines': scenario_json.get('EXCLUDED_POLL_ENGINES', []),
        'auto_timeout_scaling': False
      }
      for scenario_json in scenario_config.CXXLanguage().scenarios()
      if 'scalable' in scenario_json.get('CATEGORIES', [])
    ] + [
      {
        'name': 'qps_json_driver',
        'shortname': 'qps_json_driver:inproc_%s' % scenario_json['name'],
        'args': ['--run_inproc', '--scenarios_json', _scenario_json_string(scenario_json, False)],
        'ci_platforms': ['linux'],
        'platforms': ['linux'],
        'flaky': False,
        'language': 'c++',
        'boringssl': True,
        'defaults': 'boringssl',
        'cpu_cost': guess_cpu(scenario_json, False),
        'exclude_configs': ['tsan', 'asan'],
        'timeout_seconds': 6*60,
        'excluded_poll_engines': scenario_json.get('EXCLUDED_POLL_ENGINES', [])
      }
      for scenario_json in scenario_config.CXXLanguage().scenarios()
      if 'inproc' in scenario_json.get('CATEGORIES', [])
    ] + [
      {
        'name': 'json_run_localhost',
        'shortname': 'json_run_localhost:%s_low_thread_count' % scenario_json['name'],
        'args': ['--scenarios_json', _scenario_json_string(scenario_json, True)],
        'ci_platforms': ['linux'],
        'platforms': ['linux'],
        'flaky': False,
        'language': 'c++',
        'boringssl': True,
        'defaults': 'boringssl',
        'cpu_cost': guess_cpu(scenario_json, True),
        'exclude_configs': sorted(c for c in configs_from_yaml if c not in ('tsan', 'asan')),
        'timeout_seconds': 10*60,
        'excluded_poll_engines': scenario_json.get('EXCLUDED_POLL_ENGINES', []),
        'auto_timeout_scaling': False
     }
      for scenario_json in scenario_config.CXXLanguage().scenarios()
      if 'scalable' in scenario_json.get('CATEGORIES', [])
    ]
  }


print(yaml.dump(generate_yaml()))
