#!/usr/bin/env python

"""
Utility script for submitting benchmark results to an LNT server.
"""

import datetime
import json
import optparse
import subprocess
import sys
import urllib
import urllib2

# Test status codes.
PASS = 0
FAIL = 1
XFAIL = 2

###

def capture_with_result(args, include_stderr=False):
    """capture_with_result(command) -> (output, exit code)

    Run the given command (or argv list) in a shell and return the standard
    output and exit code."""
    stderr = subprocess.PIPE
    if include_stderr:
        stderr = subprocess.STDOUT
    try:
        p = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=stderr)
    except OSError,e:
        if e.errno == errno.ENOENT:
            fatal('no such file or directory: %r when running %s.' % (
                  args[0], ' '.join(args)))
        raise
    out,_ = p.communicate()
    return out,p.wait()

def capture(args, include_stderr=False):
    """capture(command) - Run the given command (or argv list) in a shell and
    return the standard output."""
    return capture_with_result(args, include_stderr)[0]

def timestamp():
    return datetime.datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S')

###

def submit_results_to_server(results_data, submit_url):
    # Submit the URL encoded data.
    data = urllib.urlencode({ 'input_data' : results_data,
                              'commit' : '1' })
    response = urllib2.urlopen(urllib2.Request(submit_url, data))
    result_data = response.read()

    # The result is expected to be a JSON object.
    try:
        return json.loads(result_data)
    except:
        import traceback
        print "Unable to load result, not a valid JSON object."
        print
        print "Traceback:"
        traceback.print_exc()
        print
        print "Result:"
        print result_data
        return

###

def main():
   parser = optparse.OptionParser("""%prog [options] <results>""")
   parser.add_option("", "--submit", dest="submit_url", metavar="URL",
                     help="Submit results to the given URL",
                     action="store", type=str, default=None)
   parser.add_option("", "--output", dest="output", metavar="PATH",
                     help="Write raw report data to PATH",
                     action="store", type=str, default=None)
   parser.add_option("", "--machine-name", dest="machine_name", metavar="NAME",
                     help="Set the machine name to embed in the report",
                     action="store", type=str, default=None)
   parser.add_option("", "--run-order", dest="run_order", metavar="REVISION",
                     help="Set the run order to embed in the report",
                     action="store", type=int, default=None)
   opts, args = parser.parse_args()

   # At least one of --submit or --output is required.
   if len(args) != 1:
      parser.error("incorrect number of arguments")
   if opts.submit_url is None and opts.output is None:
      parser.error("no action given (provide --submit or --output)")
   if opts.machine_name is None:
      parser.error("--machine-name is required")
   if opts.run_order is None:
      parser.error("--run-order is required")

   # Load the results data.
   results_path, = args
   with open(results_path) as f:
      data = json.load(f)

   # Compute some data not present in the 'lit' report.
   machine_name = opts.machine_name
   run_order = str(opts.run_order)

   # Estimate the end time as being now, and the start time as being that minus
   # the elapsed testing time.
   utcnow = datetime.datetime.utcnow()
   start_time = utcnow - datetime.timedelta(seconds=data['elapsed'])
   end_time = utcnow
   
   # Create the LNT report format.
   lnt_results = {}
   lnt_results['Machine'] = {
      'Name' : machine_name,
      'Info' : {
         'hardware' : capture(["uname","-m"], include_stderr=True).strip(),
         'name' : capture(["uname","-n"], include_stderr=True).strip(),
         'os' : capture(["uname","-sr"], include_stderr=True).strip(),
         'uname' : capture(["uname","-a"], include_stderr=True).strip(),
         } }

   # FIXME: Record source versions for LLVM, Swift, etc.?
   lnt_results['Run'] = {
      'Start Time' : start_time.strftime('%Y-%m-%d %H:%M:%S'),
      'End Time' : end_time.strftime('%Y-%m-%d %H:%M:%S'),
      'Info' : {
         '__report_version__' : '1',
         'tag' : 'nts',
         'inferred_run_order' : run_order,
         'run_order' : run_order,
         'sw_vers' : capture(['sw_vers'], include_stderr=True).strip(),
         } }

   lnt_results['Tests'] = lnt_tests = []
   for test in data['tests']:
      # Ignore tests which have unexpected status.
      code = test['code']
      if code not in ('PASS', 'XPASS', 'FAIL', 'XFAIL'):
         sys.stderr.write("ignoring test %r with result code %r" % (
               test['name'], code))
         continue

      # Extract the test name, which is encoded as 'suite :: name'.
      test_name = 'nts.%s' % (test['name'].split('::',1)[1][1:],)

      # Convert this test to the 'nts' schema.
      compile_success = test['metrics'].get('compile_success', 1)
      compile_time = test['metrics']['compile_time']
      exec_success = test['metrics'].get('exec_success', 1)
      exec_time = test['metrics']['exec_time']

      # FIXME: Ensure the test success flags matches the result code.
      # FIXME: The XFAIL handling here isn't going to be right.

      if not compile_success:
         lnt_tests.append({ 'Name' : '%s.compile.status' % (test_name,),
                            'Info' : {},
                            'Data' : [ FAIL ] })
      if not exec_success:
         lnt_tests.append({ 'Name' : '%s.exec.status' % (test_name,),
                            'Info' : {},
                            'Data' : [ FAIL ] })
      lnt_tests.append({ 'Name' : '%s.compile' % (test_name,),
                         'Info' : {},
                         'Data' : [ compile_time ] })
      lnt_tests.append({ 'Name' : '%s.exec' % (test_name,),
                         'Info' : {},
                         'Data' : [ exec_time ] })

   # Create the report data.
   lnt_result_data = json.dumps(lnt_results, indent=2) + '\n'

   # Write the results, if requested.
   if opts.output:
      sys.stderr.write('%s: generating report: %r\n' % (
            timestamp(), opts.output))
      with open(opts.output, 'w') as f:
         f.write(lnt_result_data)

   # Submit the results to an LNT server, if requested.
   if opts.submit_url:
      submit_results_to_server(lnt_result_data, opts.submit_url)
      
if __name__ == '__main__':
   main()