// Licensed to the Apache Software Foundation (ASF) under one
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// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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.

#include "runtime/fragment_mgr.h"

#include <gen_cpp/PaloInternalService_types.h>
#include <gtest/gtest-message.h>
#include <gtest/gtest-test-part.h>

// IWYU pragma: no_include <bits/chrono.h>
#include <chrono> // IWYU pragma: keep
#include <thread>

#include "common/config.h"
#include "exec/data_sink.h"
#include "gtest/gtest_pred_impl.h"
#include "runtime/exec_env.h"
#include "runtime/plan_fragment_executor.h"
#include "runtime/runtime_state.h"

namespace doris {

static Status s_prepare_status;
static Status s_open_status;
// Mock used for this unittest
PlanFragmentExecutor::PlanFragmentExecutor(ExecEnv* exec_env,
                                           const report_status_callback& report_status_cb)
        : _exec_env(exec_env), _report_status_cb(report_status_cb) {}

PlanFragmentExecutor::~PlanFragmentExecutor() {}

Status PlanFragmentExecutor::prepare(const TExecPlanFragmentParams& request,
                                     QueryContext* batch_ctx) {
    return s_prepare_status;
}

Status PlanFragmentExecutor::open() {
    std::this_thread::sleep_for(std::chrono::milliseconds(50));
    return s_open_status;
}

void PlanFragmentExecutor::cancel(const PPlanFragmentCancelReason& reason, const std::string& msg) {
}

void PlanFragmentExecutor::close() {}

class FragmentMgrTest : public testing::Test {
public:
    FragmentMgrTest() {}

protected:
    virtual void SetUp() {
        s_prepare_status = Status::OK();
        s_open_status = Status::OK();

        config::fragment_pool_thread_num_min = 32;
        config::fragment_pool_thread_num_max = 32;
        config::fragment_pool_queue_size = 1024;
    }
    virtual void TearDown() {}
};

TEST_F(FragmentMgrTest, Normal) {
    FragmentMgr mgr(nullptr);
    TExecPlanFragmentParams params;
    params.params.fragment_instance_id = TUniqueId();
    params.params.fragment_instance_id.__set_hi(100);
    params.params.fragment_instance_id.__set_lo(200);
    EXPECT_TRUE(mgr.exec_plan_fragment(params).ok());
    // Duplicated
    EXPECT_TRUE(mgr.exec_plan_fragment(params).ok());
}

TEST_F(FragmentMgrTest, AddNormal) {
    FragmentMgr mgr(nullptr);
    for (int i = 0; i < 8; ++i) {
        TExecPlanFragmentParams params;
        params.params.fragment_instance_id = TUniqueId();
        params.params.fragment_instance_id.__set_hi(100 + i);
        params.params.fragment_instance_id.__set_lo(200);
        EXPECT_TRUE(mgr.exec_plan_fragment(params).ok());
    }
}

TEST_F(FragmentMgrTest, CancelNormal) {
    FragmentMgr mgr(nullptr);
    TExecPlanFragmentParams params;
    params.params.fragment_instance_id = TUniqueId();
    params.params.fragment_instance_id.__set_hi(100);
    params.params.fragment_instance_id.__set_lo(200);
    EXPECT_TRUE(mgr.exec_plan_fragment(params).ok());
}

TEST_F(FragmentMgrTest, CancelWithoutAdd) {
    FragmentMgr mgr(nullptr);
    TExecPlanFragmentParams params;
    params.params.fragment_instance_id = TUniqueId();
    params.params.fragment_instance_id.__set_hi(100);
    params.params.fragment_instance_id.__set_lo(200);
}

TEST_F(FragmentMgrTest, PrepareFailed) {
    s_prepare_status = Status::InternalError("Prepare failed.");
    FragmentMgr mgr(nullptr);
    TExecPlanFragmentParams params;
    params.params.fragment_instance_id = TUniqueId();
    params.params.fragment_instance_id.__set_hi(100);
    params.params.fragment_instance_id.__set_lo(200);
    EXPECT_FALSE(mgr.exec_plan_fragment(params).ok());
}

TEST_F(FragmentMgrTest, OfferPoolFailed) {
    config::fragment_pool_thread_num_min = 1;
    config::fragment_pool_thread_num_max = 1;
    config::fragment_pool_queue_size = 0;
    FragmentMgr mgr(doris::ExecEnv::GetInstance());

    TExecPlanFragmentParams params;
    params.params.fragment_instance_id = TUniqueId();
    params.params.fragment_instance_id.__set_hi(100);
    params.params.fragment_instance_id.__set_lo(200);
    EXPECT_TRUE(mgr.exec_plan_fragment(params).ok());

    // the first plan open will cost 50ms, so the next 3 plans will be aborted.
    for (int i = 1; i < 4; ++i) {
        TExecPlanFragmentParams params;
        params.params.fragment_instance_id = TUniqueId();
        params.params.fragment_instance_id.__set_hi(100 + i);
        params.params.fragment_instance_id.__set_lo(200);
        EXPECT_FALSE(mgr.exec_plan_fragment(params).ok());
    }
}

} // namespace doris