import re

try:
    from googleapiclient.errors import Error as GoogleApiError
    DEPENDENCIES_FOUND = True
except ImportError:
    DEPENDENCIES_FOUND = False

from edmond.plugin import Plugin


class YoutubeParserPlugin(Plugin):

    VIDEO_URL_RE = re.compile(
        r"https:\/\/www\.youtube\.com\/watch\?(?:.*&)?v=([^&]+)"
    )

    def __init__(self, bot):
        super().__init__(bot)
        self.priority = -3
        self._youtube_plugin = None

    @property
    def youtube_plugin(self):
        if self._youtube_plugin is None:
            self._youtube_plugin = self.bot.get_plugin("youtube")
        return self._youtube_plugin

    def on_welcome(self, _):
        if not (self.youtube_plugin and self.youtube_plugin.is_ready):
            self.bot.log_w("Youtube plugin is not available.")
            self.is_ready = False

    def on_pubmsg(self, event):
        match = self.VIDEO_URL_RE.match(event.arguments[0])
        if match:
            self.tell_video_title(match.group(1), event.target)
            return True
        return False

    def tell_video_title(self, video_id, target):
        try:
            search_response = self.youtube_plugin.youtube.videos().list(
                id=video_id,
                part="snippet",
            ).execute()
        except GoogleApiError:
            self.signal_failure(target)
            return
        title = ""
        for result in search_response.get("items", []):
            if result["kind"] == "youtube#video":
                title = result["snippet"]["title"]
                break
        else:
            self.signal_failure(target)
            return
        self.bot.say(target, title)