// https://github.com/apache/dolphinscheduler/blob/3.0.0-release/dolphinscheduler-alert/dolphinscheduler-alert-plugins/dolphinscheduler-alert-script/src/main/java/org/apache/dolphinscheduler/plugin/alert/script/ScriptSender.java

package org.apache.dolphinscheduler.plugin.alert.script;

import org.apache.dolphinscheduler.alert.api.AlertResult;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.File;
import java.util.Map;

public final class ScriptSender {
    private static final Logger logger = LoggerFactory.getLogger(ScriptSender.class);
    private static final String ALERT_TITLE_OPTION = " -t ";
    private static final String ALERT_CONTENT_OPTION = " -c ";
    private static final String ALERT_USER_PARAMS_OPTION = " -p ";
    private final String scriptPath;
    private final String scriptType;
    private final String userParams;

    ScriptSender(Map<String, String> config) {
        scriptPath = config.get(ScriptParamsConstants.NAME_SCRIPT_PATH);
        scriptType = config.get(ScriptParamsConstants.NAME_SCRIPT_TYPE);
        userParams = config.get(ScriptParamsConstants.NAME_SCRIPT_USER_PARAMS);
    }

    AlertResult sendScriptAlert(String title, String content) {
        AlertResult alertResult = new AlertResult();
        if (ScriptType.SHELL.getDescp().equals(scriptType)) {
            return executeShellScript(title, content);
        }
        return alertResult;
    }

    private AlertResult executeShellScript(String title, String content) {
        AlertResult alertResult = new AlertResult();
        alertResult.setStatus("false");
        if (Boolean.TRUE.equals(OSUtils.isWindows())) {
            alertResult.setMessage("shell script not support windows os");
            return alertResult;
        }
        //validate script path in case of injections
        File shellScriptFile = new File(scriptPath);
        //validate existence
        if (!shellScriptFile.exists()) {
            logger.error("shell script not exist : {}", scriptPath);
            alertResult.setMessage("shell script not exist : " + scriptPath);
            return alertResult;
        }
        //validate is file
        if (!shellScriptFile.isFile()) {
            logger.error("shell script is not a file : {}", scriptPath);
            alertResult.setMessage("shell script is not a file : " + scriptPath);
            return alertResult;
        }

        String[] cmd = {"/bin/sh", "-c", scriptPath + ALERT_TITLE_OPTION + "'" + title + "'" + ALERT_CONTENT_OPTION + "'" + content + "'" + ALERT_USER_PARAMS_OPTION + "'" + userParams + "'"};
        int exitCode = ProcessUtils.executeScript(cmd);

        if (exitCode == 0) {
            alertResult.setStatus("true");
            alertResult.setMessage("send script alert msg success");
            return alertResult;
        }
        alertResult.setMessage("send script alert msg error,exitCode is " + exitCode);
        logger.info("send script alert msg error,exitCode is {}", exitCode);
        return alertResult;
    }

}