// 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 "olap/schema.h"

#include <glog/logging.h>

#include <boost/iterator/iterator_facade.hpp>

#include <ostream>

#include <unordered_set>

#include <utility>

#include "common/config.h"

#include "olap/olap_common.h"

#include "runtime/define_primitive_type.h"

#include "util/trace.h"

#include "vec/columns/column_array.h"

#include "vec/columns/column_dictionary.h"

#include "vec/columns/column_map.h"

#include "vec/columns/column_nullable.h"

#include "vec/columns/column_struct.h"

#include "vec/columns/columns_number.h"

#include "vec/columns/predicate_column.h"

#include "vec/core/types.h"

#include "vec/data_types/data_type.h"

#include "vec/data_types/data_type_factory.hpp"

namespace doris {

Schema::Schema(const Schema& other) {

    _copy_from(other);

}

Schema& Schema::operator=(const Schema& other) {

    if (this != &other) {

        _copy_from(other);

    }

    return *this;

}

void Schema::_copy_from(const Schema& other) {

    _col_ids = other._col_ids;

    _col_offsets = other._col_offsets;

    _num_key_columns = other._num_key_columns;

    _schema_size = other._schema_size;

    // Deep copy _cols

    // TODO(lingbin): really need clone?

    _cols.resize(other._cols.size(), nullptr);

    for (auto cid : _col_ids) {

        _cols[cid] = other._cols[cid]->clone();

    }

}

void Schema::_init(const std::vector<TabletColumnPtr>& cols, const std::vector<ColumnId>& col_ids,

                   size_t num_key_columns) {

    _col_ids = col_ids;

    _num_key_columns = num_key_columns;

    _cols.resize(cols.size(), nullptr);

    _col_offsets.resize(_cols.size(), -1);

    size_t offset = 0;

    std::unordered_set<uint32_t> col_id_set(col_ids.begin(), col_ids.end());

    for (int cid = 0; cid < cols.size(); ++cid) {

        if (col_id_set.find(cid) == col_id_set.end()) {

            continue;

        }

        _cols[cid] = FieldFactory::create(*cols[cid]);

        _col_offsets[cid] = offset;

        // Plus 1 byte for null byte

        offset += _cols[cid]->size() + 1;

    }

    _schema_size = offset;

}

void Schema::_init(const std::vector<const Field*>& cols, const std::vector<ColumnId>& col_ids,

                   size_t num_key_columns) {

    _col_ids = col_ids;

    _num_key_columns = num_key_columns;

    _cols.resize(cols.size(), nullptr);

    _col_offsets.resize(_cols.size(), -1);

    size_t offset = 0;

    std::unordered_set<uint32_t> col_id_set(col_ids.begin(), col_ids.end());

    for (int cid = 0; cid < cols.size(); ++cid) {

        if (col_id_set.find(cid) == col_id_set.end()) {

            continue;

        }

        // TODO(lingbin): is it necessary to clone Field? each SegmentIterator will

        // use this func, can we avoid clone?

        _cols[cid] = cols[cid]->clone();

        _col_offsets[cid] = offset;

        // Plus 1 byte for null byte

        offset += _cols[cid]->size() + 1;

    }

    _schema_size = offset;

}

Schema::~Schema() {

    for (auto col : _cols) {

        delete col;

    }

}

vectorized::DataTypePtr Schema::get_data_type_ptr(const Field& field) {

    return vectorized::DataTypeFactory::instance().create_data_type(field);

}

vectorized::IColumn::MutablePtr Schema::get_column_by_field(const Field& field) {

    return get_data_type_ptr(field)->create_column();

}

vectorized::IColumn::MutablePtr Schema::get_predicate_column_ptr(const FieldType& type,

                                                                 bool is_nullable,

                                                                 const ReaderType reader_type) {

    vectorized::IColumn::MutablePtr ptr = nullptr;

    switch (type) {

    case FieldType::OLAP_FIELD_TYPE_BOOL:

        ptr = doris::vectorized::PredicateColumnType<TYPE_BOOLEAN>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_TINYINT:

        ptr = doris::vectorized::PredicateColumnType<TYPE_TINYINT>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_SMALLINT:

        ptr = doris::vectorized::PredicateColumnType<TYPE_SMALLINT>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_INT:

        ptr = doris::vectorized::PredicateColumnType<TYPE_INT>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_FLOAT:

        ptr = doris::vectorized::PredicateColumnType<TYPE_FLOAT>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_DOUBLE:

        ptr = doris::vectorized::PredicateColumnType<TYPE_DOUBLE>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_BIGINT:

        ptr = doris::vectorized::PredicateColumnType<TYPE_BIGINT>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_LARGEINT:

        ptr = doris::vectorized::PredicateColumnType<TYPE_LARGEINT>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_DATE:

        ptr = doris::vectorized::PredicateColumnType<TYPE_DATE>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_DATEV2:

        ptr = doris::vectorized::PredicateColumnType<TYPE_DATEV2>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_DATETIMEV2:

        ptr = doris::vectorized::PredicateColumnType<TYPE_DATETIMEV2>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_DATETIME:

        ptr = doris::vectorized::PredicateColumnType<TYPE_DATETIME>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_CHAR:

        if (config::enable_low_cardinality_optimize && reader_type == ReaderType::READER_QUERY) {

            ptr = doris::vectorized::ColumnDictI32::create(type);

        } else {

            ptr = doris::vectorized::PredicateColumnType<TYPE_CHAR>::create();

        }

        break;

    case FieldType::OLAP_FIELD_TYPE_VARCHAR:

    case FieldType::OLAP_FIELD_TYPE_STRING:

    case FieldType::OLAP_FIELD_TYPE_JSONB:

        if (config::enable_low_cardinality_optimize && reader_type == ReaderType::READER_QUERY) {

            ptr = doris::vectorized::ColumnDictI32::create(type);

        } else {

            ptr = doris::vectorized::PredicateColumnType<TYPE_STRING>::create();

        }

        break;

    case FieldType::OLAP_FIELD_TYPE_DECIMAL:

        ptr = doris::vectorized::PredicateColumnType<TYPE_DECIMALV2>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_DECIMAL32:

        ptr = doris::vectorized::PredicateColumnType<TYPE_DECIMAL32>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_DECIMAL64:

        ptr = doris::vectorized::PredicateColumnType<TYPE_DECIMAL64>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_DECIMAL128I:

        ptr = doris::vectorized::PredicateColumnType<TYPE_DECIMAL128I>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_DECIMAL256:

        ptr = doris::vectorized::PredicateColumnType<TYPE_DECIMAL256>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_IPV4:

        ptr = doris::vectorized::PredicateColumnType<TYPE_IPV4>::create();

        break;

    case FieldType::OLAP_FIELD_TYPE_IPV6:

        ptr = doris::vectorized::PredicateColumnType<TYPE_IPV6>::create();

        break;

    default:

        throw Exception(

                ErrorCode::SCHEMA_SCHEMA_FIELD_INVALID,

                fmt::format("Unexpected type when choosing predicate column, type={}", int(type)));

    }

    if (is_nullable) {

        return doris::vectorized::ColumnNullable::create(std::move(ptr),

                                                         doris::vectorized::ColumnUInt8::create());

    }

    return ptr;

}

} // namespace doris