/*
 * Copyright 2021 The casbin Authors. All Rights Reserved.
 *
 * 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.
 *
 * This is a test file for benchmarking the performance of casbin's Management API
 */

#include <benchmark/benchmark.h>
#include <casbin/casbin.h>

#include <random>

#include "config_path.h"

static std::random_device generator;
static std::uniform_int_distribution<int> dist_100(1, 100);
static std::uniform_int_distribution<int> dist_1000(1, 1000);
static std::uniform_int_distribution<int> dist_10000(1, 10000);
static std::vector<std::string> params(3);

static inline int GetRandom100() { return dist_100(generator); }

static inline int GetRandom1000() { return dist_1000(generator); }

static inline int GetRandom10000() { return dist_10000(generator); }

static void BenchmarkVectorOperations(benchmark::State& state) {
    for (auto _ : state) params = {"user" + std::to_string(GetRandom10000()), "data" + std::to_string(GetRandom10000() / 10), "read"};
}

BENCHMARK(BenchmarkVectorOperations);

static void BenchmarkHasPolicySmall(benchmark::State& state) {
    casbin::Enforcer e(basic_model_path);

    // 100 roles, 10 resources.
    for (int i = 0; i < 100; ++i) params = {"user" + std::to_string(i), "data" + std::to_string(i / 10), "read"}, e.AddPolicy(params);

    for (auto _ : state) params = {"user" + std::to_string(GetRandom100()), "data" + std::to_string(GetRandom100() / 10), "read"}, e.HasPolicy(params);
}

BENCHMARK(BenchmarkHasPolicySmall);

static void BenchmarkAddPolicySmall(benchmark::State& state) {
    casbin::Enforcer e(basic_model_path);

    // 100 roles, 10 resources.
    for (int i = 0; i < 100; ++i) params = {"user" + std::to_string(i), "data" + std::to_string(i / 10), "read"}, e.AddPolicy(params);

    for (auto _ : state) params = {"user" + std::to_string(GetRandom100() + 100), "data" + std::to_string((GetRandom100() + 100) / 10), "read"}, e.AddPolicy(params);
}

BENCHMARK(BenchmarkAddPolicySmall);

static void BenchmarkRemovePolicySmall(benchmark::State& state) {
    casbin::Enforcer e(basic_model_path);

    // 100 roles, 10 resources.
    for (int i = 100; i < 100; ++i) params = {"user" + std::to_string(i), "data" + std::to_string(i / 10), "read"}, e.AddPolicy(params);

    for (auto _ : state) params = {"user" + std::to_string(GetRandom100()), "data" + std::to_string(GetRandom100() / 10), "read"}, e.RemovePolicy(params);
}

BENCHMARK(BenchmarkRemovePolicySmall);