import time

try:
    import wikipedia
    DEPENDENCIES_FOUND = True
except ImportError:
    DEPENDENCIES_FOUND = False

from edmond.plugin import Plugin


class WikipediaPlugin(Plugin):

    REQUIRED_CONFIGS = [
        "commands", "ambiguous_response", "empty_response", "lang",
    ]
    NUM_RETRIES = 3

    def __init__(self, bot):
        super().__init__(bot)
        if not self.is_ready:
            return
        wikipedia.set_lang(self.config["lang"])

    def on_pubmsg(self, event):
        if not self.should_handle_command(event.arguments[0]):
            return False
        if self.command.ident == "science":
            self.tell_random_summary(event)
        elif self.command.ident == "define":
            self.tell_definition(event)
        return True

    def tell_random_summary(self, event):
        summary = ""
        retries = self.NUM_RETRIES
        while retries > 0:
            try:
                summary = wikipedia.summary(wikipedia.random(), sentences=1)
                break
            except wikipedia.exceptions.WikipediaException:
                pass
            retries -= 1
        if summary:
            self.bot.say(event.target, summary)

    def tell_definition(self, event):
        summary = ""
        retries = self.NUM_RETRIES
        while retries > 0:
            try:
                summary = wikipedia.summary(self.command.content, sentences=1)
                break
            except wikipedia.exceptions.DisambiguationError:
                summary = self.config["ambiguous_response"]
                break
            except wikipedia.exceptions.PageError:
                summary = self.config["empty_response"]
                break
            except wikipedia.exceptions.WikipediaException:
                summary = self.bot.config["error_message"]
                # Keep trying after a slight delay.
                time.sleep(1)
            retries -= 1
        if summary:
            self.bot.say(event.target, summary)