/*
 *
 *  * ============LICENSE_START=======================================================
 *  *  org.onap.dcae
 *  *  ================================================================================
 *  *  Copyright (c) 2020  AT&T Intellectual Property. All rights reserved.
 *  *  ================================================================================
 *  *  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.
 *  *  ============LICENSE_END=========================================================
 *
 *
 */

package org.onap.blueprintgenerator.service.base;

import org.onap.blueprintgenerator.exception.FixesException;
import org.springframework.stereotype.Service;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.io.FileReader;
import java.io.File;
import java.util.ArrayList;
import java.util.List;

/**
 * @author : Ravi Mantena
 * @date 10/16/2020 Application: DCAE/ONAP - Blueprint Generator Common Module: Used by both ONAp
 * and DCAE Blueprint Applications Service: For Blueprint Quotes Fixes
 */
@Service
public class FixesService {

    /**
     * Interface to fix Single Quotes in the generated Blueprint
     *
     * @param file File
     * @return
     */
    public void fixDcaeSingleQuotes(File file) {
        List<String> lines = new ArrayList<>();
        try {
            FileReader fr = new FileReader(file);
            BufferedReader br = new BufferedReader(fr);
            for (String line = br.readLine(); line != null; line = br.readLine()) {
                if (line.contains("'")) {
                    line = processLine(line);
                }
                if (line.contains("get_input") || line.contains("get_secret") || line
                    .contains("envs")) {
                    line = line.replaceAll("'", "");
                }

                lines.add(line);
            }

            fr.close();
            br.close();

            FileWriter fw = new FileWriter(file);
            PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(file, true)));
            for (String s : lines) {
                out.println();
                out.write(s);
                out.flush();
            }
            out.close();
            fw.close();
        } catch (Exception e) {
            throw new FixesException("Unable to Fix Single Quotes in Final DCAE Blueprint", e);
        }
    }

    /**
     * Interface to fix String Quotes in the generated Blueprint
     *
     * @param string String
     * @return
     */
    public String fixStringQuotes(String string) {
        String sLines[] = string.split("\n");
        String ret = "";
        for (String line : sLines) {
            if (line.contains("get_input")
                || line.contains("get_secret")
                || ((line.contains("concat")
                || line.contains("default: ")
                || line.contains("description")
                || line.contains("dmaap")
                || line.contains(".\"'"))
                && line.contains("'"))) {
                line = line.replaceAll("'", "");
            }

            if (line.contains("'")) {
                line = processLine(line);
            }
            ret = ret + "\n" + line;
        }
        return ret;
    }

    /**
     * Interface to fix Single Quotes in the generated ONAP Blueprint
     *
     * @param file File
     * @return
     */
    public void fixOnapSingleQuotes(File file) {
        List<String> lines = new ArrayList<>();
        try {
            FileReader fr = new FileReader(file);
            BufferedReader br = new BufferedReader(fr);
            for (String line = br.readLine(); line != null; line = br.readLine()) {
                if (line.contains("'")) {
                    line = line.replace("'", "");
                }
                if (line.contains("\"\"") && (line.contains("m") || line.contains("M"))) {
                    line = line.replaceAll("\"\"", "\"");
                }
                lines.add(line);
            }
            fr.close();
            br.close();
            FileWriter fw = new FileWriter(file);
            PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter(file, true)));
            for (String s : lines) {
                out.println();
                out.write(s);
                out.flush();
            }

            out.close();
            fw.close();

        } catch (Exception e) {
            throw new FixesException("Unable to Fix Single Quotes in final ONAP Blueprint", e);
        }
    }

    /**
     * Interface to fix Single Quotes for given line
     *
     * @param line Line
     * @return
     */
    private String ensureNoSingleQuotes(String line) {
        if ((line.contains("concat")
            || line.contains("default: ")
            || line.contains("description")
            || line.contains("dmaap")
            || line.contains(".\"'"))
            && line.contains("'")) {
            return line.replace("'", "");
        } else {
            return line;
        }
    }

    /**
     * Interface to Applt fixes for Quotes
     *
     * @param bp Blueprint
     * @return
     */
    public String applyFixes(String bp) {
        List<String> lines = new ArrayList<>();
        String[] linesPre = bp.split("\n");
        for (String line : linesPre) {
            lines.add(ensureNoSingleQuotes(line));
        }
        return String.join("\n", lines);
    }

    private String processLine(String line) {
        return line.replaceAll("'\\{", "{")
            .replaceAll("}'", "}")
            .replaceAll("'\\[", "[")
            .replaceAll("]'", "]")
            .replaceAll("'''''", "'")
            .replaceAll("'''", "'")
            .replaceAll("'''", "")
            .replaceAll("''\\{", "'{")
            .replaceAll("}''", "}'")
            .replaceAll("''\\[", "'[")
            .replaceAll("]''", "]'")
            .replaceAll("\"''", "'")
            .replaceAll("''\"", "'");
    }
}