#!/usr/bin/env python3
"""Create or update a webhook integration screenshot using a test fixture."""

import argparse
import base64
import os
import subprocess
import sys
from typing import Any, Dict, Optional, Tuple
from urllib.parse import parse_qsl, urlencode

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

# check for the venv
from tools.lib import sanity_check

sanity_check.check_venv(__file__)

from scripts.lib.setup_path import setup_path

setup_path()

os.environ["DJANGO_SETTINGS_MODULE"] = "zproject.settings"
import django

django.setup()

import orjson
import requests
import zulip

from scripts.lib.zulip_tools import BOLDRED, ENDC
from tools.lib.test_script import prepare_puppeteer_run
from zerver.actions.create_user import do_create_user, notify_created_bot
from zerver.actions.streams import bulk_add_subscriptions
from zerver.actions.user_settings import do_change_avatar_fields
from zerver.lib.integrations import (
    DOC_SCREENSHOT_CONFIG,
    INTEGRATIONS,
    BaseScreenshotConfig,
    Integration,
    ScreenshotConfig,
    WebhookIntegration,
    get_fixture_and_image_paths,
    split_fixture_path,
)
from zerver.lib.storage import static_path
from zerver.lib.streams import create_stream_if_needed
from zerver.lib.upload import upload_avatar_image
from zerver.lib.webhooks.common import get_fixture_http_headers
from zerver.models import Message, UserProfile, get_realm, get_user_by_delivery_email


def create_integration_bot(integration: Integration, bot_name: Optional[str] = None) -> UserProfile:
    realm = get_realm("zulip")
    owner = get_user_by_delivery_email("iago@zulip.com", realm)
    bot_email = f"{integration.name}-bot@example.com"
    if bot_name is None:
        bot_name = f"{integration.name.capitalize()} Bot"
    try:
        bot = UserProfile.objects.get(email=bot_email)
    except UserProfile.DoesNotExist:
        bot = do_create_user(
            email=bot_email,
            password="123",
            realm=owner.realm,
            full_name=bot_name,
            bot_type=UserProfile.INCOMING_WEBHOOK_BOT,
            bot_owner=owner,
            acting_user=owner,
        )
        notify_created_bot(bot)

        bot_avatar_path = integration.get_bot_avatar_path()
        if bot_avatar_path is not None:
            bot_avatar_path = static_path(bot_avatar_path)
            if os.path.isfile(bot_avatar_path):
                with open(bot_avatar_path, "rb") as f:
                    upload_avatar_image(f, owner, bot)
                    do_change_avatar_fields(bot, UserProfile.AVATAR_FROM_USER, acting_user=owner)

    return bot


def create_integration_stream(integration: Integration, bot: UserProfile) -> None:
    assert isinstance(bot.bot_owner, UserProfile)
    realm = bot.bot_owner.realm
    stream, created = create_stream_if_needed(realm, integration.stream_name)
    bulk_add_subscriptions(realm, [stream], [bot, bot.bot_owner], acting_user=bot)


def get_fixture_info(fixture_path: str) -> Tuple[Any, bool, str]:
    json_fixture = fixture_path.endswith(".json")
    _, fixture_name = split_fixture_path(fixture_path)

    if fixture_name:
        if json_fixture:
            with open(fixture_path, "rb") as fb:
                data = orjson.loads(fb.read())
        else:
            with open(fixture_path) as f:
                data = f.read().strip()
    else:
        data = ""

    return data, json_fixture, fixture_name


def get_integration(integration_name: str) -> Integration:
    integration = INTEGRATIONS[integration_name]
    return integration


def get_requests_headers(integration_name: str, fixture_name: str) -> Dict[str, Any]:
    headers = get_fixture_http_headers(integration_name, fixture_name)

    def fix_name(header: str) -> str:
        header = header if not header.startswith("HTTP_") else header[len("HTTP_") :]
        return header.replace("_", "-")

    return {fix_name(k): v for k, v in headers.items()}


def custom_headers(headers_json: str) -> Dict[str, str]:
    if not headers_json:
        return {}
    try:
        return orjson.loads(headers_json)
    except orjson.JSONDecodeError as ve:
        raise argparse.ArgumentTypeError(
            "Encountered an error while attempting to parse custom headers: {}\n"
            "Note: all strings must be enclosed within \"\" instead of ''".format(ve)
        )


def send_bot_mock_message(
    bot: UserProfile, integration: Integration, fixture_path: str, config: BaseScreenshotConfig
) -> None:
    # Delete all messages, so new message is the only one it's message group
    Message.objects.filter(sender=bot).delete()
    data, _, _ = get_fixture_info(fixture_path)

    assert bot.bot_owner is not None
    url = f"{bot.bot_owner.realm.uri}"
    client = zulip.Client(email=bot.email, api_key=bot.api_key, site=url)

    try:
        request = {
            "type": "stream",
            "to": integration.stream_name,
            "topic": data["subject"],
            "content": data["body"],
        }
        client.send_message(request)
    except KeyError:
        print(
            "{} contains invalid configuration. "
            'Fields "subject" and "body" are required for non-webhook integrations.'.format(
                fixture_path
            )
        )
        sys.exit(1)


def send_bot_payload_message(
    bot: UserProfile, integration: WebhookIntegration, fixture_path: str, config: ScreenshotConfig
) -> bool:
    # Delete all messages, so new message is the only one it's message group
    Message.objects.filter(sender=bot).delete()
    data, json_fixture, fixture_name = get_fixture_info(fixture_path)

    headers = get_requests_headers(integration.name, fixture_name)
    headers.update(config.custom_headers)
    if config.use_basic_auth:
        credentials = base64.b64encode(f"{bot.email}:{bot.api_key}".encode()).decode()
        auth = f"basic {credentials}"
        headers.update(dict(Authorization=auth))

    assert isinstance(bot.bot_owner, UserProfile)
    stream = integration.stream_name or "devel"
    url = f"{bot.bot_owner.realm.uri}/{integration.url}"
    params = {"api_key": bot.api_key, "stream": stream}
    params.update(config.extra_params)

    extra_args = {}
    if not json_fixture and data:
        # We overwrite any params in fixture with our params. stream name, for
        # example, may be defined in the fixture.
        assert isinstance(data, str)
        parsed_params = dict(parse_qsl(data))
        parsed_params.update(params)
        params = parsed_params

    elif config.payload_as_query_param:
        params[config.payload_param_name] = orjson.dumps(data).decode()

    else:
        extra_args = {"json": data}

    url = f"{url}?{urlencode(params)}"

    try:
        response = requests.post(url=url, headers=headers, **extra_args)
    except requests.exceptions.ConnectionError:
        print(
            "This tool needs the local dev server to be running. "
            "Please start it using tools/run-dev.py before running this tool."
        )
        sys.exit(1)
    if response.status_code != 200:
        print(response.json())
        print("Failed to trigger webhook")
        return False
    else:
        print(f"Triggered {integration.name} webhook")
        return True


def capture_last_message_screenshot(bot: UserProfile, image_path: str) -> None:
    message = Message.objects.filter(sender=bot).last()
    realm = get_realm("zulip")
    if message is None:
        print(f"No message found for {bot.full_name}")
        return
    message_id = str(message.id)
    screenshot_script = os.path.join(TOOLS_DIR, "message-screenshot.js")
    subprocess.check_call(["node", screenshot_script, message_id, image_path, realm.uri])


def generate_screenshot_from_config(
    integration_name: str, screenshot_config: BaseScreenshotConfig
) -> None:
    integration = get_integration(integration_name)
    fixture_path, image_path = get_fixture_and_image_paths(integration, screenshot_config)
    bot = create_integration_bot(integration, screenshot_config.bot_name)
    create_integration_stream(integration, bot)
    if isinstance(integration, WebhookIntegration):
        assert isinstance(
            screenshot_config, ScreenshotConfig
        ), "Webhook integrations require ScreenshotConfig"
        message_sent = send_bot_payload_message(bot, integration, fixture_path, screenshot_config)
    else:
        send_bot_mock_message(bot, integration, fixture_path, screenshot_config)
        message_sent = True
    if message_sent:
        capture_last_message_screenshot(bot, image_path)
        print(f"Screenshot captured to: {BOLDRED}{image_path}{ENDC}")


parser = argparse.ArgumentParser()
group = parser.add_mutually_exclusive_group(required=True)
group.add_argument("--all", action="store_true")
group.add_argument("--integration", help="Name of the integration")
parser.add_argument("--fixture", help="Name of the fixture file to use")
parser.add_argument("--image-name", help="Name for the screenshot image")
parser.add_argument("--image-dir", help="Directory name where to save the screenshot image")
parser.add_argument("--bot-name", help="Name to use for the bot")
parser.add_argument(
    "-A", "--use-basic-auth", action="store_true", help="Add basic auth headers to the request"
)
parser.add_argument(
    "-Q",
    "--payload-as-query-param",
    action="store_true",
    help="Send payload as query param instead of body",
)
parser.add_argument("-P", "--payload-param-name", help="Param name to use for the payload")
parser.add_argument(
    "-H",
    "--custom-headers",
    type=custom_headers,
    help="Any additional headers to be sent with the request.",
)

options = parser.parse_args()
prepare_puppeteer_run()

if options.all:
    for key, value in vars(options).items():
        if key != "all" and value:
            print("Generating screenshots for all integrations. Ignoring all command-line options")
    for integration_name, screenshot_configs in DOC_SCREENSHOT_CONFIG.items():
        for screenshot_config in screenshot_configs:
            generate_screenshot_from_config(integration_name, screenshot_config)

elif options.fixture:
    config = dict(
        fixture_name=options.fixture,
        use_basic_auth=options.use_basic_auth,
        custom_headers=options.custom_headers,
        payload_as_query_param=options.payload_as_query_param,
    )
    if options.image_name:
        config["image_name"] = options.image_name
    if options.image_dir:
        config["image_dir"] = options.image_dir
    if options.bot_name:
        config["bot_name"] = options.bot_name
    if options.payload_param_name:
        config["payload_param_name"] = options.payload_param_name
    screenshot_config = ScreenshotConfig(**config)
    generate_screenshot_from_config(options.integration, screenshot_config)

elif options.integration in DOC_SCREENSHOT_CONFIG:
    configs = DOC_SCREENSHOT_CONFIG[options.integration]
    for screenshot_config in configs:
        generate_screenshot_from_config(options.integration, screenshot_config)

else:
    parser.error(
        "Could not find configuration for integration. "
        "You can specify a fixture file to use, using the --fixture flag. "
        "Or add a configuration to zerver.lib.integrations.DOC_SCREENSHOT_CONFIG",
    )