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/*
 * 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.
 */

package org.dinky.shaded.paimon.partition;

import org.dinky.shaded.paimon.operation.FileStoreCommitImpl;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.annotation.Nullable;

import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.time.format.DateTimeParseException;
import java.time.format.ResolverStyle;
import java.time.format.SignStyle;
import java.time.temporal.ChronoField;
import java.util.List;
import java.util.Locale;
import java.util.Objects;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

import static java.time.temporal.ChronoField.DAY_OF_MONTH;
import static java.time.temporal.ChronoField.HOUR_OF_DAY;
import static java.time.temporal.ChronoField.MINUTE_OF_HOUR;
import static java.time.temporal.ChronoField.MONTH_OF_YEAR;
import static java.time.temporal.ChronoField.SECOND_OF_MINUTE;
import static java.time.temporal.ChronoField.YEAR;

/** Time extractor to extract time from partition values. */
public class PartitionTimeExtractor {

    private static final Logger LOG = LoggerFactory.getLogger(FileStoreCommitImpl.class);
    private static final DateTimeFormatter TIMESTAMP_FORMATTER =
            new DateTimeFormatterBuilder()
                    .appendValue(YEAR, 1, 10, SignStyle.NORMAL)
                    .appendLiteral('-')
                    .appendValue(MONTH_OF_YEAR, 1, 2, SignStyle.NORMAL)
                    .appendLiteral('-')
                    .appendValue(DAY_OF_MONTH, 1, 2, SignStyle.NORMAL)
                    .optionalStart()
                    .appendLiteral(" ")
                    .appendValue(HOUR_OF_DAY, 1, 2, SignStyle.NORMAL)
                    .appendLiteral(':')
                    .appendValue(MINUTE_OF_HOUR, 1, 2, SignStyle.NORMAL)
                    .appendLiteral(':')
                    .appendValue(SECOND_OF_MINUTE, 1, 2, SignStyle.NORMAL)
                    .optionalStart()
                    .appendFraction(ChronoField.NANO_OF_SECOND, 1, 9, true)
                    .optionalEnd()
                    .optionalEnd()
                    .toFormatter()
                    .withResolverStyle(ResolverStyle.LENIENT);

    private static final DateTimeFormatter DATE_FORMATTER =
            new DateTimeFormatterBuilder()
                    .appendValue(YEAR, 1, 10, SignStyle.NORMAL)
                    .appendLiteral('-')
                    .appendValue(MONTH_OF_YEAR, 1, 2, SignStyle.NORMAL)
                    .appendLiteral('-')
                    .appendValue(DAY_OF_MONTH, 1, 2, SignStyle.NORMAL)
                    .toFormatter()
                    .withResolverStyle(ResolverStyle.LENIENT);

    @Nullable private final String pattern;
    @Nullable private final String formatter;

    public PartitionTimeExtractor(@Nullable String pattern, @Nullable String formatter) {
        this.pattern = pattern;
        this.formatter = formatter;
    }

    public LocalDateTime extract(List partitionKeys, List