from Tank import Utils
from Tank.Core import AbstractPlugin
from Tank.Plugins.Aggregator import AggregatorPlugin, AbstractReader
import os
import subprocess
import tempfile

# TODO: 3 make it work with new aggregator

class ApacheBenchmarkPlugin(AbstractPlugin):

    SECTION = 'ab'
    
    def __init__(self, core):
        AbstractPlugin.__init__(self, core)
        self.end = None
        self.out_file = None
        self.process = None

    @staticmethod
    def get_key():
        return __file__;
    
    def configure(self):
        self.options = self.get_option("options", '')
        self.url = self.get_option("url", 'http://localhost/')
        self.requests = self.get_option("requests", '100')
        self.concurrency = self.get_option("concurrency", '1')
        self.out_file = tempfile.mkstemp('.log', 'ab_', self.core.artifacts_base_dir)[1]
        self.core.add_artifact_file(self.out_file)

    def prepare_test(self):
        aggregator = None
        try:
            aggregator = self.core.get_plugin_of_type(AggregatorPlugin)
        except Exception, ex:
            self.log.warning("No aggregator found: %s", ex)

        if aggregator:
            aggregator.reader = ABReader(aggregator, self)
            
    def start_test(self):
        args = ['ab', '-r', '-g', self.out_file,
                '-n', self.requests,
                '-c', self.concurrency, self.url]
        self.log.info("Starting ab with arguments: %s", args)
        self.process = subprocess.Popen(args, stderr=subprocess.PIPE, stdout=subprocess.PIPE)
           
    def is_test_finished(self):
        rc = self.process.poll()
        if rc != None:
            self.log.debug("%s exit code: %s", self.SECTION, rc)
            return rc
        else:
            return -1

        if self.process:
            Utils.log_stdout_stderr(self.log, self.process.stdout, self.process.stderr, self.SECTION)

            
    def end_test(self, retcode):
        if self.process and self.process.poll() == None:
            self.log.warn("Terminating ab process with PID %s", self.process.pid)
            self.process.terminate()
        else:
            self.log.info("Seems ab finished OK")

        if self.process:
            Utils.log_stdout_stderr(self.log, self.process.stdout, self.process.stderr, self.SECTION)
        return retcode
            

 
class ABReader(AbstractReader):
    '''
    Adapter to read AB files
    '''
    def __init__(self, aggregator, ab):
        AbstractReader.__init__(self, aggregator)
        self.ab = ab
        self.results = None
    
    def check_open_files(self):
        if not self.results and os.path.exists(self.ab.out_file):
            self.log.debug("Opening ab out file: %s", self.ab.out_file)
            self.results = open(self.ab.out_file, 'r')
    
    def get_next_sample(self, force):
        if self.results:
            read_lines = self.results.readlines()
            if read_lines:
                read_lines.pop(0) # remove header line
            self.log.debug("About to process %s result lines", len(read_lines))
            for line in read_lines:
                line = line.strip()
                if not line:
                    return None 
                #Tue Sep 25 14:19:36 2012        1348568376      0       36      36      34
                data = line.split("\t")
                if len(data) != 6:
                    self.log.warning("Wrong read_lines line, skipped: %s", line)
                    continue
                cur_time = int(data[1])
                ctime = int(data[2])
                dtime = int(data[3])
                ttime = int(data[4])
                wait = int(data[5])
    
                if not cur_time in self.data_buffer.keys():
                    self.data_queue.append(cur_time)
                    self.data_buffer[cur_time] = []
                #        marker, threads, overallRT, httpCode, netCode
                data_item = ['', 0, ttime, 0, 0]
                # bytes:     sent    received
                data_item += [0, 0]
                #        connect    send    latency    receive
                data_item += [ctime, 0, wait, 0]
                #        accuracy
                data_item += [0]
                self.data_buffer[cur_time].append(data_item)
                    
        if self.data_queue:
            return self.pop_second()
        else:
            return None