"""Pushsafer platform for notify component."""
import base64
import logging
import mimetypes

import requests
from requests.auth import HTTPBasicAuth
import voluptuous as vol

from homeassistant.components.notify import (
    ATTR_DATA,
    ATTR_TARGET,
    ATTR_TITLE,
    ATTR_TITLE_DEFAULT,
    PLATFORM_SCHEMA,
    BaseNotificationService,
)
from homeassistant.const import HTTP_OK
import homeassistant.helpers.config_validation as cv

_LOGGER = logging.getLogger(__name__)
_RESOURCE = "https://www.pushsafer.com/api"
_ALLOWED_IMAGES = ["image/gif", "image/jpeg", "image/png"]

CONF_DEVICE_KEY = "private_key"
CONF_TIMEOUT = 15

# Top level attributes in 'data'
ATTR_SOUND = "sound"
ATTR_VIBRATION = "vibration"
ATTR_ICON = "icon"
ATTR_ICONCOLOR = "iconcolor"
ATTR_URL = "url"
ATTR_URLTITLE = "urltitle"
ATTR_TIME2LIVE = "time2live"
ATTR_PRIORITY = "priority"
ATTR_RETRY = "retry"
ATTR_EXPIRE = "expire"
ATTR_ANSWER = "answer"
ATTR_PICTURE1 = "picture1"

# Attributes contained in picture1
ATTR_PICTURE1_URL = "url"
ATTR_PICTURE1_PATH = "path"
ATTR_PICTURE1_USERNAME = "username"
ATTR_PICTURE1_PASSWORD = "password"
ATTR_PICTURE1_AUTH = "auth"

PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({vol.Required(CONF_DEVICE_KEY): cv.string})


def get_service(hass, config, discovery_info=None):
    """Get the Pushsafer.com notification service."""
    return PushsaferNotificationService(
        config.get(CONF_DEVICE_KEY), hass.config.is_allowed_path
    )


class PushsaferNotificationService(BaseNotificationService):
    """Implementation of the notification service for Pushsafer.com."""

    def __init__(self, private_key, is_allowed_path):
        """Initialize the service."""
        self._private_key = private_key
        self.is_allowed_path = is_allowed_path

    def send_message(self, message="", **kwargs):
        """Send a message to specified target."""
        if kwargs.get(ATTR_TARGET) is None:
            targets = ["a"]
            _LOGGER.debug("No target specified. Sending push to all")
        else:
            targets = kwargs.get(ATTR_TARGET)
            _LOGGER.debug("%s target(s) specified", len(targets))

        title = kwargs.get(ATTR_TITLE, ATTR_TITLE_DEFAULT)
        data = kwargs.get(ATTR_DATA, {})

        # Converting the specified image to base64
        picture1 = data.get(ATTR_PICTURE1)
        picture1_encoded = ""
        if picture1 is not None:
            _LOGGER.debug("picture1 is available")
            url = picture1.get(ATTR_PICTURE1_URL, None)
            local_path = picture1.get(ATTR_PICTURE1_PATH, None)
            username = picture1.get(ATTR_PICTURE1_USERNAME)
            password = picture1.get(ATTR_PICTURE1_PASSWORD)
            auth = picture1.get(ATTR_PICTURE1_AUTH)

            if url is not None:
                _LOGGER.debug("Loading image from url %s", url)
                picture1_encoded = self.load_from_url(url, username, password, auth)
            elif local_path is not None:
                _LOGGER.debug("Loading image from file %s", local_path)
                picture1_encoded = self.load_from_file(local_path)
            else:
                _LOGGER.warning("missing url or local_path for picture1")
        else:
            _LOGGER.debug("picture1 is not specified")

        payload = {
            "k": self._private_key,
            "t": title,
            "m": message,
            "s": data.get(ATTR_SOUND, ""),
            "v": data.get(ATTR_VIBRATION, ""),
            "i": data.get(ATTR_ICON, ""),
            "c": data.get(ATTR_ICONCOLOR, ""),
            "u": data.get(ATTR_URL, ""),
            "ut": data.get(ATTR_URLTITLE, ""),
            "l": data.get(ATTR_TIME2LIVE, ""),
            "pr": data.get(ATTR_PRIORITY, ""),
            "re": data.get(ATTR_RETRY, ""),
            "ex": data.get(ATTR_EXPIRE, ""),
            "a": data.get(ATTR_ANSWER, ""),
            "p": picture1_encoded,
        }

        for target in targets:
            payload["d"] = target
            response = requests.post(_RESOURCE, data=payload, timeout=CONF_TIMEOUT)
            if response.status_code != HTTP_OK:
                _LOGGER.error("Pushsafer failed with: %s", response.text)
            else:
                _LOGGER.debug("Push send: %s", response.json())

    @classmethod
    def get_base64(cls, filebyte, mimetype):
        """Convert the image to the expected base64 string of pushsafer."""
        if mimetype not in _ALLOWED_IMAGES:
            _LOGGER.warning("%s is a not supported mimetype for images", mimetype)
            return None

        base64_image = base64.b64encode(filebyte).decode("utf8")
        return f"data:{mimetype};base64,{base64_image}"

    def load_from_url(self, url=None, username=None, password=None, auth=None):
        """Load image/document/etc from URL."""
        if url is not None:
            _LOGGER.debug("Downloading image from %s", url)
            if username is not None and password is not None:
                auth_ = HTTPBasicAuth(username, password)
                response = requests.get(url, auth=auth_, timeout=CONF_TIMEOUT)
            else:
                response = requests.get(url, timeout=CONF_TIMEOUT)
            return self.get_base64(response.content, response.headers["content-type"])
        _LOGGER.warning("url not found in param")

        return None

    def load_from_file(self, local_path=None):
        """Load image/document/etc from a local path."""
        try:
            if local_path is not None:
                _LOGGER.debug("Loading image from local path")
                if self.is_allowed_path(local_path):
                    file_mimetype = mimetypes.guess_type(local_path)
                    _LOGGER.debug("Detected mimetype %s", file_mimetype)
                    with open(local_path, "rb") as binary_file:
                        data = binary_file.read()
                    return self.get_base64(data, file_mimetype[0])
            else:
                _LOGGER.warning("Local path not found in params!")
        except OSError as error:
            _LOGGER.error("Can't load from local path: %s", error)

        return None
