#!/usr/bin/env python3
import argparse
import os
import shlex
import subprocess
import sys

ZULIP_PATH = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

# Request the special webpack setup for frontend integration tests,
# where webpack assets are compiled up front rather than running in
# watch mode.
os.environ["PUPPETEER_TESTS"] = "1"

os.environ["CHROMIUM_EXECUTABLE"] = os.path.join(ZULIP_PATH, "node_modules/.bin/chromium")
os.environ.pop("http_proxy", "")
os.environ.pop("https_proxy", "")

usage = """test-js-with-puppeteer [options]
    test-js-with-puppeteer # Run all test files
    test-js-with-puppeteer 09-navigation.js # Run a single test file
    test-js-with-puppeteer 09 # Run a single test file 09-navigation.js
    test-js-with-puppeteer 01-login.js 03-narrow.js # Run a few test files
    test-js-with-puppeteer 01 03 # Run a few test files, 01-login.js and 03-narrow.js here"""
parser = argparse.ArgumentParser(usage)

parser.add_argument('--interactive',
                    action="store_true",
                    help='Run tests interactively')
parser.add_argument('--force',
                    action="store_true",
                    help='Run tests despite possible problems.')
parser.add_argument('tests', nargs=argparse.REMAINDER,
                    help='Specific tests to run; by default, runs all tests')

options = parser.parse_args()

sys.path.insert(0, ZULIP_PATH)

# check for the venv
from tools.lib import sanity_check

sanity_check.check_venv(__file__)

from typing import Iterable, Tuple

from tools.lib.test_script import (
    assert_provisioning_status_ok,
    find_js_test_files,
    prepare_puppeteer_run,
)
from tools.lib.test_server import test_server_running


def run_tests(files: Iterable[str], external_host: str) -> None:
    test_dir = os.path.join(ZULIP_PATH, 'frontend_tests/puppeteer_tests')
    test_files = find_js_test_files(test_dir, files)

    def run_tests(test_number: int=0) -> Tuple[int, int]:
        ret = 1
        current_test_num = test_number
        for test_file in test_files[test_number:]:
            test_name = os.path.basename(test_file)
            cmd = ["node", test_file]
            print("\n\n===================== {}\nRunning {}\n\n".format(test_name, " ".join(map(shlex.quote, cmd))), flush=True)
            ret = subprocess.call(cmd)
            if ret != 0:
                return ret, current_test_num
            current_test_num += 1
        return 0, -1

    with test_server_running(False, external_host):
        # Important: do this next call inside the `with` block, when Django
        #            will be pointing at the test database.
        subprocess.check_call('tools/setup/generate-test-credentials')
        if options.interactive:
            response = input('Press Enter to run tests, "q" to quit: ')
            ret = 1
            failed_test_num = 0
            while response != 'q' and failed_test_num != -1:
                ret, failed_test_num = run_tests(failed_test_num)
                if ret != 0:
                    response = input('Tests failed. Press Enter to re-run tests, "q" to quit: ')
        else:
            ret = 1
            ret = run_tests()[0]
    if ret != 0:
        print("""
The Puppeteer frontend tests failed! For help debugging, read:
  https://zulip.readthedocs.io/en/latest/testing/testing-with-puppeteer.html
or report and ask for help in chat.zulip.org""", file=sys.stderr)
        if os.environ.get("CIRCLECI"):
            print("", file=sys.stderr)
            print("In CircleCI, the Artifacts tab contains screenshots of the failure.", file=sys.stderr)
            print("", file=sys.stderr)
        else:
            print("It's also worthy to see screenshots generated on failure stored under var/puppeteer/*.png")
        sys.exit(ret)

external_host = "zulipdev.com:9981"
assert_provisioning_status_ok(options.force)
prepare_puppeteer_run()
run_tests(options.tests, external_host)
sys.exit(0)