/*
 * 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 com.dtstack.flink.sql.util;

import com.dtstack.flink.sql.enums.ColumnType;
import org.apache.commons.lang3.StringUtils;
import com.google.common.base.Strings;
import com.google.common.collect.Maps;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.sql.Timestamp;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * Reason:
 * Date: 2018/6/22
 * Company: www.dtstack.com
 * @author xuchao
 */

public class DtStringUtil {

    private static final Pattern NO_VERSION_PATTERN = Pattern.compile("([a-zA-Z]+).*");

    private static ObjectMapper objectMapper = new ObjectMapper();


    /**
     * Split the specified string delimiter --- ignored quotes delimiter
     * @param str
     * @param delimiter
     * @return
     */
    public static List<String> splitIgnoreQuota(String str, char delimiter){
        List<String> tokensList = new ArrayList<>();
        boolean inQuotes = false;
        boolean inSingleQuotes = false;
        int bracketLeftNum = 0;
        StringBuilder b = new StringBuilder();
        char[] chars = str.toCharArray();
        int idx = 0;
        for (char c : chars) {
            char flag = 0;
            if (idx > 0) {
                flag = chars[idx - 1];
            }
            if (c == delimiter) {
                if (inQuotes) {
                    b.append(c);
                } else if (inSingleQuotes) {
                    b.append(c);
                } else if (bracketLeftNum > 0) {
                    b.append(c);
                } else {
                    tokensList.add(b.toString());
                    b = new StringBuilder();
                }
            } else if (c == '\"' && '\\' != flag && !inSingleQuotes) {
                inQuotes = !inQuotes;
                b.append(c);
            } else if (c == '\'' && '\\' != flag && !inQuotes) {
                inSingleQuotes = !inSingleQuotes;
                b.append(c);
            } else if (c == '(' && !inSingleQuotes && !inQuotes) {
                bracketLeftNum++;
                b.append(c);
            } else if (c == ')' && !inSingleQuotes && !inQuotes) {
                bracketLeftNum--;
                b.append(c);
            } else {
                b.append(c);
            }
            idx++;
        }

        tokensList.add(b.toString());

        return tokensList;
    }


    public static String replaceIgnoreQuota(String str, String oriStr, String replaceStr){
        String splitPatternStr = oriStr + "(?=(?:[^\"]*\"[^\"]*\")*[^\"]*$)(?=(?:[^']*'[^']*')*[^']*$)";
        return str.replaceAll(splitPatternStr, replaceStr);
    }

    /**
     * 处理 sql 中 "--" 注释，而不删除引号内的内容
     *
     * @param sql 解析出来的 sql
     * @return 返回无注释内容的 sql
     */
    public static String dealSqlComment(String sql) {
        boolean inQuotes = false;
        boolean inSingleQuotes = false;
        int bracketLeftNum = 0;
        StringBuilder b = new StringBuilder(sql.length());
        char[] chars = sql.toCharArray();
        for (int index = 0; index < chars.length; index ++) {
            if (index == chars.length) {
                return b.toString();
            }
            StringBuilder tempSb = new StringBuilder(2);
            if (index > 1) {
                tempSb.append(chars[index - 1]);
                tempSb.append(chars[index]);
            }

            if (tempSb.toString().equals("--")) {
                if (inQuotes) {
                    b.append(chars[index]);
                } else if (inSingleQuotes) {
                    b.append(chars[index]);
                } else if (bracketLeftNum > 0) {
                    b.append(chars[index]);
                } else {
                    b.deleteCharAt(b.length() - 1);
                    while (chars[index] != '\n') {
                        // 判断注释内容是不是行尾或者 sql 的最后一行
                        if (index == chars.length - 1) {
                            break;
                        }
                        index++;
                    }
                }
            } else if (chars[index] == '\"' && '\\' != chars[index] && !inSingleQuotes) {
                inQuotes = !inQuotes;
                b.append(chars[index]);
            } else if (chars[index] == '\'' && '\\' != chars[index] && !inQuotes) {
                inSingleQuotes = !inSingleQuotes;
                b.append(chars[index]);
            } else {
                b.append(chars[index]);
            }
        }
        return b.toString();
    }

    public static String col2string(Object column, String type) {
        String rowData = column.toString();
        ColumnType columnType = ColumnType.valueOf(type.toUpperCase());
        Object result = null;
        switch (columnType) {
            case TINYINT:
                result = Byte.valueOf(rowData);
                break;
            case SMALLINT:
                result = Short.valueOf(rowData);
                break;
            case INT:
                result = Integer.valueOf(rowData);
                break;
            case BIGINT:
                result = Long.valueOf(rowData);
                break;
            case FLOAT:
                result = Float.valueOf(rowData);
                break;
            case DOUBLE:
                result = Double.valueOf(rowData);
                break;
            case DECIMAL:
                result = new BigDecimal(rowData);
                break;
            case STRING:
            case VARCHAR:
            case CHAR:
                result = rowData;
                break;
            case BOOLEAN:
                result = Boolean.valueOf(rowData);
                break;
            case DATE:
                result = DateUtil.dateToString((java.util.Date)column);
                break;
            case TIMESTAMP:
                result = DateUtil.timestampToString((java.util.Date)column);
                break;
            default:
                throw new IllegalArgumentException();
        }
        return result.toString();
    }

    public static String getPluginTypeWithoutVersion(String engineType){

        Matcher matcher = NO_VERSION_PATTERN.matcher(engineType);
        if(!matcher.find()){
            return engineType;
        }

        return matcher.group(1);
    }

    /**
     * add specify params to dbUrl
     * @param dbUrl
     * @param addParams
     * @param isForce true:replace exists param
     * @return
     */
    public static String addJdbcParam(String dbUrl, Map<String, String> addParams, boolean isForce){

        if(Strings.isNullOrEmpty(dbUrl)){
            throw new RuntimeException("dburl can't be empty string, please check it.");
        }

        if(addParams == null || addParams.size() == 0){
            return dbUrl;
        }

        String[] splits = dbUrl.split("\\?");
        String preStr = splits[0];
        Map<String, String> params = Maps.newHashMap();
        if(splits.length > 1){
            String existsParamStr = splits[1];
            String[] existsParams = StringUtils.split(existsParamStr, "&");
            for(String oneParam : existsParams){
                String[] kv = StringUtils.split(oneParam, "=");
                if(kv.length != 2){
                    throw new RuntimeException("illegal dbUrl:" + dbUrl);
                }

                params.put(kv[0], kv[1]);
            }
        }

        for(Map.Entry<String, String> addParam : addParams.entrySet()){
            if(!isForce && params.containsKey(addParam.getKey())){
                continue;
            }

            params.put(addParam.getKey(), addParam.getValue());
        }

        //rebuild dbURL
        StringBuilder sb = new StringBuilder();
        boolean isFirst = true;
        for(Map.Entry<String, String> param : params.entrySet()){
            if(!isFirst){
                sb.append("&");
            }

            sb.append(param.getKey()).append("=").append(param.getValue());
            isFirst = false;
        }

        return preStr + "?" + sb.toString();
    }

    public static boolean isJson(String str) {
        boolean flag = false;
        if (StringUtils.isNotBlank(str)) {
            try {
                objectMapper.readValue(str, Map.class);
                flag = true;
            } catch (Throwable e) {
                flag = false;
            }
        }
        return flag;
    }

    public static Object parse(String str,Class clazz){
        String fieldType = clazz.getName();
        Object object = null;
        if(fieldType.equals(Integer.class.getName())){
            object = Integer.parseInt(str);
        }else if(fieldType.equals(Long.class.getName())){
            object = Long.parseLong(str);
        }else if(fieldType.equals(Byte.class.getName())){
            object = str.getBytes()[0];
        }else if(fieldType.equals(String.class.getName())){
            object = str;
        }else if(fieldType.equals(Float.class.getName())){
            object = Float.parseFloat(str);
        }else if(fieldType.equals(Double.class.getName())){
            object = Double.parseDouble(str);
        }else if (fieldType.equals(Timestamp.class.getName())){
            object = Timestamp.valueOf(str);
        }else{
            throw new RuntimeException("no support field type for sql. the input type:" + fieldType);
        }
        return object;
    }


    public static String firstUpperCase(String str) {
        return str.substring(0, 1).toUpperCase() + str.substring(1);
    }

    public static String getTableFullPath(String schema, String tableName) {
        String[] tableInfoSplit = StringUtils.split(tableName, ".");
        //表明表信息带了schema
        if(tableInfoSplit.length == 2){
            schema = tableInfoSplit[0];
            tableName = tableInfoSplit[1];
        }

        //清理首个字符" 和最后字符 "
        schema = rmStrQuote(schema);
        tableName = rmStrQuote(tableName);

        if (StringUtils.isEmpty(schema)){
            return addQuoteForStr(tableName);
        }

        String schemaAndTabName = addQuoteForStr(schema) + "." + addQuoteForStr(tableName);
        return schemaAndTabName;
    }

    /**
     * 清理首个字符" 和最后字符 "
     */
    public static String rmStrQuote(String str){
        if(StringUtils.isEmpty(str)){
            return str;
        }

        if(str.startsWith("\"")){
            str = str.substring(1);
        }

        if(str.endsWith("\"")){
            str = str.substring(0, str.length()-1);
        }

        return str;
    }

    public static String addQuoteForStr(String column) {
        return getStartQuote() + column + getEndQuote();
    }

    public static String getStartQuote() {
        return "\"";
    }

    public static String getEndQuote() {
        return "\"";
    }
}
