// Licensed to the Apache Software Foundation (ASF) under one

// or more contributor license agreements.  See the NOTICE file

// 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 "exec/spill/spill_file.h"

#include <glog/logging.h>

#include <filesystem>

#include <memory>

#include <utility>

#include "exec/spill/spill_file_manager.h"

#include "exec/spill/spill_file_reader.h"

#include "exec/spill/spill_file_writer.h"

#include "io/fs/local_file_system.h"

#include "runtime/exec_env.h"

#include "runtime/query_context.h"

#include "runtime/runtime_profile.h"

#include "runtime/runtime_state.h"

#include "util/debug_points.h"

namespace doris {

SpillFile::SpillFile(SpillDataDir* data_dir, std::string relative_path)

        : _data_dir(data_dir),

          _spill_dir(data_dir->get_spill_data_path() + "/" + std::move(relative_path)) {}

SpillFile::~SpillFile() {

    gc();

}

void SpillFile::gc() {

    bool exists = false;

    auto status = io::global_local_filesystem()->exists(_spill_dir, &exists);

    if (status.ok() && exists) {

        // Delete spill directory directly instead of moving it to a GC directory.

        // This simplifies cleanup and avoids retaining spill data under a GC path.

        status = io::global_local_filesystem()->delete_directory(_spill_dir);

        DBUG_EXECUTE_IF("fault_inject::spill_file::gc", {

            status = Status::Error<INTERNAL_ERROR>("fault_inject spill_file gc failed");

        });

        if (!status.ok()) {

            LOG_EVERY_T(WARNING, 1) << fmt::format("failed to delete spill data, dir {}, error: {}",

                                                   _spill_dir, status.to_string());

        }

    }

    // Decrease spill data usage even if per-file cleanup failed. QueryContext teardown deletes the

    // whole query spill directory and retains failures for later retries.

    _data_dir->update_spill_data_usage(-_total_written_bytes);

    _total_written_bytes = 0;

}

Status SpillFile::create_writer(RuntimeState* state, RuntimeProfile* profile,

                                SpillFileWriterSPtr& writer) {

    writer = std::make_shared<SpillFileWriter>(shared_from_this(), state, profile, _data_dir,

                                               _spill_dir);

    // _active_writer is set in SpillFileWriter constructor via the shared_ptr

    return Status::OK();

}

SpillFileReaderSPtr SpillFile::create_reader(RuntimeState* state, RuntimeProfile* profile) const {

    // It's a programming error to create a reader while a writer is still active.

    DCHECK(_active_writer == nullptr) << "create_reader() called while writer still active";

    return std::make_shared<SpillFileReader>(state, profile, _spill_dir, _part_count);

}

void SpillFile::finish_writing() {

    _ready_for_reading = true;

    // writer finished; clear active writer pointer

    _active_writer = nullptr;

}

void SpillFile::update_written_bytes(int64_t delta_bytes) {

    _total_written_bytes += delta_bytes;

}

void SpillFile::increment_part_count() {

    ++_part_count;

}

} // namespace doris