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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this file,
# You can obtain one at http://mozilla.org/MPL/2.0/.
from __future__ import absolute_import, print_function

import copy
import os
import sys

from mozlog.commandline import setup_logging
from talos import utils, test
from talos.cmdline import parse_args


class ConfigurationError(Exception):
    pass


DEFAULTS = dict(
    # args to pass to browser
    extra_args=[],
    buildid='testbuildid',
    init_url='getInfo.html',
    env={'NO_EM_RESTART': '1'},
    # base data for all tests
    basetest=dict(
        cycles=1,
        profile_path='${talos}/base_profile',
        responsiveness=False,
        gecko_profile=False,
        gecko_profile_interval=1,
        gecko_profile_entries=100000,
        resolution=1,
        mainthread=False,
        shutdown=False,
        timeout=3600,
        tpchrome=True,
        tpcycles=10,
        tpmozafterpaint=False,
        tphero=False,
        pdfpaint=True,
        fnbpaint=False,
        firstpaint=False,
        format_pagename=True,
        userready=False,
        testeventmap=[],
        base_vs_ref=False,
        tppagecycles=1,
        tploadnocache=False,
        tpscrolltest=False,
        win_counters=[],
        w7_counters=[],
        linux_counters=[],
        mac_counters=[],
        xperf_counters=[],
        setup=None,
        cleanup=None,
        preferences={},
    ),
)


# keys to generated self.config that are global overrides to tests
GLOBAL_OVERRIDES = (
    'cycles',
    'gecko_profile',
    'gecko_profile_interval',
    'gecko_profile_entries',
    'tpcycles',
    'tppagecycles',
    'tpmanifest',
    'tptimeout',
    'tpmozafterpaint',
    'tphero',
    'fnbpaint',
    'pdfpaint',
    'firstpaint',
    'userready',
)


CONF_VALIDATORS = []


def validator(func):
    """
    A decorator that register configuration validators to execute against the
    configuration.

    They will be executed in the order of declaration.
    """
    CONF_VALIDATORS.append(func)
    return func


def convert_url(config, url):
    webserver = config['webserver']
    if not webserver:
        return url

    if '://' in url:
        # assume a fully qualified url
        return url

    if '.html' in url:
        url = 'http://%s/%s' % (webserver, url)

    return url


@validator
def fix_xperf(config):
    # BBB: remove doubly-quoted xperf values from command line
    # (needed for buildbot)
    # https://bugzilla.mozilla.org/show_bug.cgi?id=704654#c43
    win7_path = 'c:/Program Files/Microsoft Windows Performance Toolkit/xperf.exe'
    if config['xperf_path']:
        xperf_path = config['xperf_path']
        quotes = ('"', "'")
        for quote in quotes:
            if xperf_path.startswith(quote) and xperf_path.endswith(quote):
                config['xperf_path'] = xperf_path[1:-1]
                break
        if not os.path.exists(config['xperf_path']):
            # look for old win7 path
            if not os.path.exists(win7_path):
                raise ConfigurationError(
                    "xperf.exe cannot be found at the path specified")
            config['xperf_path'] = win7_path


@validator
def set_webserver(config):
    # pick a free port
    import socket
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.bind(('', 0))
    port = sock.getsockname()[1]
    sock.close()

    config['webserver'] = '127.0.0.1:%d' % port


@validator
def update_prefs(config):
    config.setdefault('preferences', {})

    # update prefs from command line
    prefs = config.pop('extraPrefs')
    if prefs:
        for arg in prefs:
            k, v = arg.split('=', 1)
            config['preferences'][k] = utils.parse_pref(v)


@validator
def fix_init_url(config):
    if 'init_url' in config:
        config['init_url'] = convert_url(config, config['init_url'])


@validator
def determine_local_symbols_path(config):
    if 'symbols_path' not in config:
        return

    # use objdir/dist/crashreporter-symbols for symbolsPath if none provided
    if not config['symbols_path'] and \
       config['develop'] and \
       'MOZ_DEVELOPER_OBJ_DIR' in os.environ:
        config['symbols_path'] = os.path.join(os.environ['MOZ_DEVELOPER_OBJ_DIR'],
                                              'dist',
                                              'crashreporter-symbols')


def get_counters(config):
    counters = set()
    return counters


def get_active_tests(config):
    activeTests = config.pop('activeTests').strip().split(':')

    # ensure tests are available
    availableTests = test.test_dict()
    if not set(activeTests).issubset(availableTests):
        missing = [i for i in activeTests
                   if i not in availableTests]
        raise ConfigurationError("No definition found for test(s): %s"
                                 % missing)

    return activeTests


def get_global_overrides(config):
    global_overrides = {}
    for key in GLOBAL_OVERRIDES:
        # get global overrides for all tests
        value = config[key]
        if value is not None:
            global_overrides[key] = value
        if key != 'gecko_profile':
            config.pop(key)

    return global_overrides


def build_manifest(config, manifestName):
    # read manifest lines
    with open(manifestName, 'r') as fHandle:
        manifestLines = fHandle.readlines()

    # write modified manifest lines
    with open(manifestName + '.develop', 'w') as newHandle:
        for line in manifestLines:
            newline = line.replace('localhost', config['webserver'])
            newline = newline.replace('page_load_test', 'tests')
            newHandle.write(newline)

    newManifestName = manifestName + '.develop'

    # return new manifest
    return newManifestName


def get_test(config, global_overrides, counters, test_instance):
    mozAfterPaint = getattr(test_instance, 'tpmozafterpaint', None)
    hero = getattr(test_instance, 'tphero', None)
    firstPaint = getattr(test_instance, 'firstpaint', None)
    userReady = getattr(test_instance, 'userready', None)
    firstNonBlankPaint = getattr(test_instance, 'fnbpaint', None)
    pdfPaint = getattr(test_instance, 'pdfpaint', None)

    test_instance.update(**global_overrides)

    # update original value of mozAfterPaint, this could be 'false',
    # so check for None
    if mozAfterPaint is not None:
        test_instance.tpmozafterpaint = mozAfterPaint
    if firstNonBlankPaint is not None:
        test_instance.fnbpaint = firstNonBlankPaint
    if firstPaint is not None:
        test_instance.firstpaint = firstPaint
    if userReady is not None:
        test_instance.userready = userReady
    if hero is not None:
        test_instance.tphero = hero
    if pdfPaint is not None:
        test_instance.pdfpaint = pdfPaint

    # fix up url
    url = getattr(test_instance, 'url', None)
    if url:
        test_instance.url = utils.interpolate(convert_url(config, url))

    # fix up tpmanifest
    tpmanifest = getattr(test_instance, 'tpmanifest', None)
    if tpmanifest:
        test_instance.tpmanifest = \
            build_manifest(config, utils.interpolate(tpmanifest))

    # add any counters
    if counters:
        keys = ('linux_counters', 'mac_counters',
                'win_counters', 'w7_counters', 'xperf_counters')
        for key in keys:
            if key not in test_instance.keys:
                # only populate attributes that will be output
                continue
            if not isinstance(getattr(test_instance, key, None), list):
                setattr(test_instance, key, [])
            _counters = getattr(test_instance, key)
            _counters.extend([counter for counter in counters
                              if counter not in _counters])
    return dict(test_instance.items())


@validator
def tests(config):
    counters = get_counters(config)
    global_overrides = get_global_overrides(config)
    activeTests = get_active_tests(config)
    test_dict = test.test_dict()

    tests = []
    for test_name in activeTests:
        test_class = test_dict[test_name]
        tests.append(get_test(config, global_overrides, counters,
                              test_class()))
    config['tests'] = tests


def get_browser_config(config):
    required = ('extensions', 'browser_path', 'browser_wait',
                'extra_args', 'buildid', 'env', 'init_url', 'webserver')
    optional = {'bcontroller_config': '${talos}/bcontroller.json',
                'child_process': 'plugin-container',
                'debug': False,
                'debugger': None,
                'debugger_args': None,
                'develop': False,
                'enable_webrender': False,
                'process': '',
                'framework': 'talos',
                'repository': None,
                'sourcestamp': None,
                'symbols_path': None,
                'test_timeout': 1200,
                'xperf_path': None,
                'error_filename': None,
                'no_upload_results': False,
                'stylothreads': 0,
                'subtests': None,
                'preferences': {},
                }
    browser_config = dict(title=config['title'])
    browser_config.update(dict([(i, config[i]) for i in required]))
    browser_config.update(dict([(i, config.get(i, j))
                          for i, j in optional.items()]))
    return browser_config


def suites_conf():
    import json
    with open(os.path.join(os.path.dirname(utils.here),
                           'talos.json')) as f:
        return json.load(f)['suites']


def get_config(argv=None):
    argv = argv or sys.argv[1:]
    cli_opts = parse_args(argv=argv)
    if cli_opts.suite:
        # read the suite config, update the args
        try:
            suite_conf = suites_conf()[cli_opts.suite]
        except KeyError:
            raise ConfigurationError('No such suite: %r' % cli_opts.suite)
        argv += ['-a', ':'.join(suite_conf['tests'])]
        # talos_options in the suite config should not override command line
        # options, so we prepend argv with talos_options so that, when parsed,
        # the command line options will clobber the suite config options.
        argv = suite_conf.get('talos_options', []) + argv
        # args needs to be reparsed now
    elif not cli_opts.activeTests:
        raise ConfigurationError('--activeTests or --suite required!')

    cli_opts = parse_args(argv=argv)
    setup_logging("talos", cli_opts, {"tbpl": sys.stdout})
    config = copy.deepcopy(DEFAULTS)
    config.update(cli_opts.__dict__)
    for validate in CONF_VALIDATORS:
        validate(config)
    # remove None Values
    for k, v in config.items():
        if v is None:
            del config[k]
    return config


def get_configs(argv=None):
    config = get_config(argv=argv)
    browser_config = get_browser_config(config)
    return config, browser_config


if __name__ == '__main__':
    cfgs = get_configs()
    print(cfgs[0])
    print
    print(cfgs[1])