#!/usr/bin/env python
# Copyright (C) 2011 Google Inc. All rights reserved.
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import json
import logging
import optparse
import os
import urllib2

# FIXME: See if Tools/Scripts/webkitpy/layout_tests/port/builders.py should also read
# the output json file here as its data source.


def master_json_url(master_url):
    return master_url + '/json/builders'


def builder_json_url(master_url, builder):
    return master_json_url(master_url) + '/' + urllib2.quote(builder)


def cached_build_json_url(master_url, builder, build_number):
    return builder_json_url(master_url, builder) + '/builds/' + str(build_number)


def fetch_json(url):
    logging.debug('Fetching %s' % url)
    return json.load(urllib2.urlopen(url))


def insert_builder_and_test_data(masters):
    for master in masters:
        master_url = master['url']
        tests_object = {}
        master['tests'] = tests_object

        for builder in fetch_json(master_json_url(master_url)):
            build_data = fetch_json(builder_json_url(master_url, builder))
            cached_builds = build_data['cachedBuilds']
            current_builds = build_data['currentBuilds']

            latest_cached_build = cached_builds.pop()
            while latest_cached_build in current_builds and len(cached_builds):
                latest_cached_build = cached_builds.pop()

            for step in fetch_json(cached_build_json_url(master_url, builder, latest_cached_build))['steps']:
                step_name = step['name']
                if step_name != 'layout-test':
                    continue

                # Adjust for backwards compatibility
                step_name = 'layout-tests'

                if step_name not in tests_object:
                    tests_object[step_name] = {'builders': []}
                tests_object[step_name]['builders'].append(builder)

    for step_name in tests_object:
        tests_object[step_name]['builders'].sort()


def main():
    option_parser = optparse.OptionParser()
    option_parser.add_option('-v', '--verbose', action='store_true', default=False, help='Print debug logging')
    options, args = option_parser.parse_args()

    logging.getLogger().setLevel(logging.DEBUG if options.verbose else logging.INFO)

    masters = [
        {'name': 'webkit.org', 'url': 'http://build.webkit.org'},
    ]

    insert_builder_and_test_data(masters)

    json_file_prefix = ('// This file is auto-generated by Tools/TestResultServer/generate_builders_json.py. It should not be manually modified.\n'
        '// It uses jsonp instead of proper json because we want to be able to load it from a file URL for local testing.\n'
        'LOAD_BUILDBOT_DATA(')
    json_file_suffix = ');\n';

    json_file = open(os.path.join('static-dashboards', 'builders.jsonp'), 'w')
    json_file.write(json_file_prefix + json.dumps(masters, separators=(', ', ': '), indent=4, sort_keys=True) + json_file_suffix)


if __name__ == "__main__":
    main()