#!/usr/bin/env python
from __future__ import print_function
import optparse
import os
import subprocess
import sys
import ujson

TOOLS_DIR = os.path.dirname(os.path.abspath(__file__))
sys.path.insert(0, os.path.dirname(TOOLS_DIR))
ROOT_DIR = os.path.dirname(TOOLS_DIR)

# check for the venv
from tools.lib import sanity_check
sanity_check.check_venv(__file__)

USAGE = '''
    tools/test-js-with-node                      - to run all tests
    tools/test-js-with-node util.js activity.js  - to run just a couple tests
    tools/test-js-with-node --coverage           - to generage coverage report
    '''

enforce_fully_covered = {
    'static/js/alert_words.js',
    'static/js/bot_data.js',
    'static/js/colorspace.js',
    'static/js/common.js',
    'static/js/compose_state.js',
    'static/js/compose_ui.js',
    'static/js/dict.js',
    'static/js/filter.js',
    'static/js/hash_util.js',
    'static/js/muting.js',
    'static/js/people.js',
    'static/js/pm_conversations.js',
    'static/js/reactions.js',
    'static/js/recent_senders.js',
    'static/js/rtl.js',
    'static/js/search_suggestion.js',
    'static/js/stream_sort.js',
    'static/js/topic_generator.js',
    'static/js/typing_data.js',
    'static/js/typing_status.js',
    'static/js/unread.js',
}

parser = optparse.OptionParser(USAGE)
parser.add_option('--coverage', dest='coverage',
                  action="store_true",
                  default=False, help='Get coverage report')
parser.add_option('--force', dest='force',
                  action="store_true",
                  default=False, help='Run tests despite possible problems.')
(options, args) = parser.parse_args()

from tools.lib.test_script import get_provisioning_status

if not options.force:
    ok, msg = get_provisioning_status()
    if not ok:
        print(msg)
        print('If you really know what you are doing, use --force to run anyway.')
        sys.exit(1)

os.environ['NODE_PATH'] = 'static'
os.environ['TZ'] = 'UTC'

INDEX_JS = 'frontend_tests/zjsunit/index.js'

# The index.js test runner is the real "driver" here, and we launch
# with either istanbul or node, depending on whether we want coverage
# reports.  Running under istanbul is slower and creates funny
# tracebacks, so you generally want to get coverage reports only
# after making sure tests will pass.
if options.coverage:
    if args:
        print('BAD ARGS! Coverage reports run against all files.')
        sys.exit(1)

    istanbul = os.path.join(ROOT_DIR, 'node_modules/.bin/istanbul')
    command = [istanbul, 'cover', INDEX_JS, '--dir', 'var/node-coverage']
else:
    # Normal testing, no coverage analysis.
    # Run the index.js test runner, which runs all the other tests.
    command = ['node', '--stack-trace-limit=100', INDEX_JS] + args

# If we got this far, we can run the tests!
try:
    ret = subprocess.check_call(command)
except OSError:
    print('Bad command: %s' % (command,))
    raise

NODE_COVERAGE_PATH = 'var/node-coverage/coverage.json'

if options.coverage and ret == 0:
    coverage_json = None
    try:
        with open(NODE_COVERAGE_PATH, 'r') as f:
            coverage_json = ujson.load(f)
    except IOError:
        print(NODE_COVERAGE_PATH + " doesn't exist. Cannot enforce fully covered files.")
        raise
    print()
    print("=============================================================================")
    print("Checking enforced fully covered files...")
    for relative_path in enforce_fully_covered:
        path = ROOT_DIR + "/" + relative_path
        if not (path in coverage_json):
            print("ERROR: %s has no node test coverage" % (relative_path,))
            continue
        line_coverage = coverage_json[path]['s']
        missing_lines = []
        for line in line_coverage:
            if line_coverage[line] == 0:
                missing_lines.append(line)
        if len(missing_lines):
            print("ERROR: %s no longer has complete node test coverage" % (relative_path,))
            print("  Lines missing coverage: %s" % (", ".join(sorted(missing_lines, key=int)),))
            print()
            ret = 1
    if ret:
        print("It looks like your changes lost 100% test coverage in one or more files.")
        print("Usually, the right fix for this is to add some tests.")
        print("But also check out the include/exclude lists in `tools/test-js-with-node`.")
        print("To run this check locally, use `test-js-with-node --coverage`.")
        print()
    else:
        print("All enforced fully covered files still have 100% test coverage!")
    print("=============================================================================")
    print()

if ret == 0:
    print("Test(s) passed. SUCCESS!")
else:
    print("FAIL - Test(s) failed")

sys.exit(ret)