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

import requests

sys.path.append(os.path.join(os.path.dirname(__file__), ".."))
from scripts.lib.zulip_tools import ENDC, FAIL, OKGREEN

ZULIP_PATH = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
from zerver.lib.test_fixtures import reset_zulip_test_database

# 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"

# The locale can have impact how Firefox does locale-aware sorting,
# which we do verify in some tests.
os.environ["LC_ALL"] = "C.UTF-8"

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 navigation.test.ts # Run a single test file
    test-js-with-puppeteer navi # Run a single test file navigation.test.ts
    test-js-with-puppeteer login.test.ts compose.test.ts # Run a few test files
    test-js-with-puppeteer login compose # Run a few test files, login.test.ts and compose.test.ts here"""

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

parser = argparse.ArgumentParser(usage)

parser.add_argument("--interactive", action="store_true", help="Run tests interactively")
add_provision_check_override_param(parser)
parser.add_argument("--firefox", action="store_true", help="Run tests with firefox.")
parser.add_argument("--loop", nargs="?", type=int, default=1)
parser.add_argument(
    "tests", nargs=argparse.REMAINDER, help="Specific tests to run; by default, runs all tests"
)

options = parser.parse_args()


def run_single_test(test_file: str, test_number: int, total_tests: int) -> int:
    cmd = [
        os.path.join(ZULIP_PATH, "node_modules/.bin/ts-node"),
        "--script-mode",
        "--transpile-only",
        test_file,
    ]

    test_name = os.path.basename(test_file)
    cmd_str = shlex.join(cmd)
    print(
        f"\n\n===================== ({test_number}/{total_tests}) {test_name} =====================\nRunning {cmd_str}\n\n",
        flush=True,
    )

    ret = subprocess.call(cmd)

    # Resetting test environment.
    reset_zulip_test_database()

    # We are calling to /flush_caches to remove all the server-side caches.
    response = requests.post("http://zulip.zulipdev.com:9981/flush_caches")
    assert response.status_code == 200

    return ret


def run_tests(files: Iterable[str], external_host: str, loop: int = 1) -> None:
    test_dir = os.path.join(ZULIP_PATH, "web/e2e-tests")
    test_files = find_js_test_files(test_dir, files)
    total_tests = len(test_files)

    def run_tests(test_number: int = 0) -> Tuple[int, int]:
        current_test_num = test_number
        for test_file in test_files[test_number:]:
            return_code = run_single_test(test_file, current_test_num + 1, total_tests)
            if return_code != 0:
                return return_code, current_test_num
            current_test_num += 1
        return 0, -1

    with test_server_running(options.skip_provision_check, 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":
                ret, failed_test_num = run_tests(failed_test_num)
                if ret == 0:
                    failed_test_num = 0
                    response = input('Tests succeeded. Press Enter to re-run tests, "q" to quit: ')
                else:
                    response = input('Tests failed. Press Enter to re-run tests, "q" to quit: ')
        else:
            ret = 1
            for loop_num in range(1, loop + 1):
                print(f"\n\nRunning tests in loop ({loop_num}/{loop})\n")
                ret, current_test_num = run_tests()
                if ret == 0:
                    print(f"{OKGREEN}All tests passed!{ENDC}")
                else:
                    break

    if ret != 0:
        failed_test_file_name = os.path.basename(test_files[current_test_num])
        print(
            f"""
{FAIL}The Puppeteer frontend tests failed! The failing test was:
    ./tools/test-js-with-puppeteer {"--firefox " if options.firefox else ""}{failed_test_file_name}{ENDC}
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("GITHUB_ACTIONS"):
            print("", file=sys.stderr)
            print(
                """
Screenshots generated on failure are extremely helpful for understanding
puppeteer test failures, which are uploaded as artifacts. Use the
artifact download URL available in the "Store Puppeteer artifacts" step
below to download and view the generated screenshots.
            """,
                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.skip_provision_check)
prepare_puppeteer_run(is_firefox=options.firefox)
run_tests(options.tests, external_host, options.loop)
sys.exit(0)