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# 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
#
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from ducktape.services.background_thread import BackgroundThreadService

from kafkatest.directory_layout.kafka_path import KafkaPathResolverMixin


class SimpleConsumerShell(KafkaPathResolverMixin, BackgroundThreadService):

    logs = {
        "simple_consumer_shell_log": {
            "path": "/mnt/simple_consumer_shell.log",
            "collect_default": False}
    }

    def __init__(self, context, num_nodes, kafka, topic, partition=0, stop_timeout_sec=30):
        super(SimpleConsumerShell, self).__init__(context, num_nodes)

        self.kafka = kafka
        self.topic = topic
        self.partition = partition
        self.output = ""
        self.stop_timeout_sec = stop_timeout_sec

    def _worker(self, idx, node):
        cmd = self.start_cmd(node)
        self.logger.debug("SimpleConsumerShell %d command: %s" % (idx, cmd))
        self.output = ""
        self.logger.debug(cmd)
        for line in node.account.ssh_capture(cmd):
            self.output += line
        self.logger.debug(self.output)

    def start_cmd(self, node):
        cmd = self.path.script("kafka-run-class.sh", node)
        cmd += " %s" % self.java_class_name()
        cmd += " --topic %s --broker-list %s --partition %s --no-wait-at-logend" % (self.topic, self.kafka.bootstrap_servers(), self.partition)

        cmd += " 2>> /mnt/get_simple_consumer_shell.log | tee -a /mnt/get_simple_consumer_shell.log &"
        return cmd

    def get_output(self):
        return self.output

    def stop_node(self, node):
        node.account.kill_java_processes(self.java_class_name(), allow_fail=False)

        stopped = self.wait_node(node, timeout_sec=self.stop_timeout_sec)
        assert stopped, "Node %s: did not stop within the specified timeout of %s seconds" % \
                        (str(node.account), str(self.stop_timeout_sec))

    def clean_node(self, node):
        node.account.kill_java_processes(self.java_class_name(), clean_shutdown=False, allow_fail=False)
        node.account.ssh("rm -rf /mnt/simple_consumer_shell.log", allow_fail=False)

    def java_class_name(self):
        return "kafka.tools.SimpleConsumerShell"