/*-
 * ~~~~~~licensing~~~~~~
 * atlasmap-entaxy-services
 * ==========
 * Copyright (C) 2020 - 2025 EmDev LLC
 * ==========
 * You may not use this file except in accordance with the License Terms of the Copyright
 * Holder located at: https://entaxy.ru/eula . All copyrights, all intellectual property
 * rights to the Software and any copies are the property of the Copyright Holder. Unless
 * it is explicitly allowed the Copyright Holder, the User is prohibited from using the
 * Software for commercial purposes to provide services to third parties.
 * 
 * The Copyright Holder hereby declares that the Software is provided on an "AS IS".
 * Under no circumstances does the Copyright Holder guarantee or promise that the
 * Software provided by him will be suitable or not suitable for the specific purposes
 * of the User, that the Software will meet all commercial and personal subjective
 * expectations of the User, that the Software will work properly, without technical
 * errors, quickly and uninterruptedly.
 * 
 * Under no circumstances shall the Copyright Holder or its Affiliates is not liable
 * to the User for any direct or indirect losses of the User, his expenses or actual
 * damage, including, downtime; loss of bussines; lost profit; lost earnings; loss
 * or damage to data, property, etc.
 * ~~~~~~/licensing~~~~~~
 */
/*
 * Copyright (C) 2017 Red Hat, Inc.
 *
 * 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.
 */
package io.atlasmap.actions;

import java.util.regex.Pattern;

import io.atlasmap.spi.AtlasActionProcessor;
import io.atlasmap.spi.AtlasFieldAction;
import io.atlasmap.v2.Capitalize;
import io.atlasmap.v2.FileExtension;
import io.atlasmap.v2.Lowercase;
import io.atlasmap.v2.LowercaseChar;
import io.atlasmap.v2.Normalize;
import io.atlasmap.v2.RemoveFileExtension;
import io.atlasmap.v2.SeparateByDash;
import io.atlasmap.v2.SeparateByUnderscore;
import io.atlasmap.v2.Trim;
import io.atlasmap.v2.TrimLeft;
import io.atlasmap.v2.TrimRight;
import io.atlasmap.v2.Uppercase;
import io.atlasmap.v2.UppercaseChar;

public class StringSimpleFieldActions implements AtlasFieldAction {

    public static final String STRING_SEPARATOR_REGEX = "[\\s+\\:\\_\\+\\=\\-]+";
    public static final Pattern STRING_SEPARATOR_PATTERN = Pattern.compile(STRING_SEPARATOR_REGEX);

    @AtlasActionProcessor
    public static String capitalize(Capitalize action, String input) {
        if (input == null || input.length() == 0) {
            return input;
        }
        if (input.length() == 1) {
            return String.valueOf(input.charAt(0)).toUpperCase();
        }
        return String.valueOf(input.charAt(0)).toUpperCase() + input.substring(1);
    }

    @AtlasActionProcessor
    public static String fileExtension(FileExtension action, String input) {
        if (input == null) {
            return null;
        }

        int ndx = input.lastIndexOf('.');
        return ndx < 0 ? null : input.substring(ndx + 1);
    }

    @AtlasActionProcessor
    public static String lowercase(Lowercase action, String input) {
        if (input == null) {
            return null;
        }

        return input.toLowerCase();
    }

    @AtlasActionProcessor
    public static Character lowercaseChar(LowercaseChar action, Character input) {
        if (input == null) {
            return null;
        }

        return String.valueOf(input).toLowerCase().charAt(0);
    }

    @AtlasActionProcessor
    public static String normalize(Normalize action, String input) {
        return input == null ? null : input.replaceAll("\\s+", " ").trim();
    }

    @AtlasActionProcessor
    public static String removeFileExtension(RemoveFileExtension action, String input) {
        if (input == null) {
            return null;
        }

        int ndx = input.lastIndexOf('.');
        return ndx < 0 ? input : input.substring(0, ndx);
    }

    @AtlasActionProcessor
    public static String separateByDash(SeparateByDash action, String input) {
        if (input == null || input.length() == 0) {
            return input;
        }
        return STRING_SEPARATOR_PATTERN.matcher(input).replaceAll("-");
    }

    @AtlasActionProcessor
    public static String separateByUnderscore(SeparateByUnderscore action, String input) {
        if (input == null || input.length() == 0) {
            return input;
        }
        return STRING_SEPARATOR_PATTERN.matcher(input).replaceAll("_");
    }

    @AtlasActionProcessor
    public static String trim(Trim action, String input) {
        if (input == null || input.length() == 0) {
            return input;
        }

        return input.trim();
    }

    @AtlasActionProcessor
    public static String trimLeft(TrimLeft action, String input) {
        if (input == null || input.length() == 0) {
            return input;
        }

        int i = 0;
        while (i < input.length() && Character.isWhitespace(input.charAt(i))) {
            i++;
        }
        return input.substring(i);
    }

    @AtlasActionProcessor
    public static String trimRight(TrimRight action, String input) {
        if (input == null || input.length() == 0) {
            return input;
        }

        int i = input.length() - 1;
        while (i >= 0 && Character.isWhitespace(input.charAt(i))) {
            i--;
        }
        return input.substring(0, i + 1);
    }

    @AtlasActionProcessor
    public static String uppercase(Uppercase action, String input) {
        if (input == null) {
            return null;
        }

        return input.toUpperCase();
    }

    @AtlasActionProcessor
    public static Character uppercaseChar(UppercaseChar action, Character input) {
        if (input == null) {
            return null;
        }

        return String.valueOf(input).toUpperCase().charAt(0);
    }
}
