import random

from edmond.plugin import Plugin
from edmond.utils import proc


class MiscReactionsPlugin(Plugin):
    """This plugin implements various reactions to the last message posted.

    Enable reactions you want by setting the IDs from REACTIONS in the reactions
    field on the plugin configuration. As all reactions are optional,
    configurations for each reactions are optional as well and can be safely
    removed from the configuration (as usual except fields in REQUIRED_CONFIGS).

    The types of reactions can appear with a different probability if the
    configured reaction has a suffix of ":n", n being a number defining the
    reaction weight. The default weight when no suffix is used is 1.
    """

    REQUIRED_CONFIGS = ["reactions", "rate"]

    REACTIONS = set([
        "sentence",
        "stop",
        "king",
        "mmm",
        "ooo",
        "detector",
        "repeat_letters",
    ])

    def __init__(self, bot):
        super().__init__(bot)
        self.priority = -10
        self.reactions = []
        self.weights = []

    def on_welcome(self, event):
        self.reactions, self.weights = self.get_reactions()

    def get_reactions(self):
        """Get configured reactions in a method list, maybe with weights."""
        reactions = []
        weights = []
        for reaction in self.config["reactions"]:
            weight = 1
            if ":" in reaction:
                reaction, weight_str = reaction.split(":", maxsplit=1)
                try:
                    weight = int(weight_str)
                except ValueError:
                    pass
            if reaction not in self.REACTIONS:
                continue
            reactions.append(getattr(self, f"react_with_{reaction}"))
            weights.append(weight)
        # Normalize weights.
        total_weight = sum(weights)
        weights = list(map(lambda w: w / total_weight, weights))
        self.bot.log_d(f"Reactions: {[r.__name__ for r in reactions]}")
        self.bot.log_d(f"Reaction weights: {weights}")
        return reactions, weights

    def on_pubmsg(self, event):
        if not self.respects_handling_conditions():
            return False
        if proc(self.config["rate"]):
            self.bot.log_d("Proc random reaction.")
            self.react(event)
            return True
        return False

    def react(self, event):
        if self.weights:
            method = random.choices(self.reactions, self.weights)[0]
        else:
            method = random.choice(self.reactions)
        self.bot.log_d(f"Using reaction {method.__name__}.")
        method(event)

    def react_with_sentence(self, event):
        """React with a random sentence from config list."""
        sentences = self.config.get("sentences")
        if not sentences:
            return
        self.bot.say(event.target, random.choice(sentences))

    def react_with_stop(self, event):
        """Threaten someone that it did its last... (insert last word here)."""
        stop_message = self.config.get("stop_message")
        if not stop_message:
            return
        words = event.arguments[0].split()
        if len(words) == 0:
            return
        self.bot.say(event.target, stop_message.format(subject=words[-1]))

    def react_with_king(self, event):
        """Tell the world that some emoji is the king of the last word."""
        king_message = self.config.get("king_message")
        if not king_message:
            return
        kings = self.config.get("kings")
        if not kings or len(kings) == 0:
            return
        words = event.arguments[0].split()
        if len(words) == 0:
            return
        king = random.choice(kings)
        reply = king_message.format(king=king, subject=words[-1])
        self.bot.say(event.target, reply)

    def react_with_mmm(self, event):
        """Say a mixed (mm) Skype emote."""
        num_chars = random.randint(1, 8)
        mmm = ""
        for _ in range(num_chars):
            mmm += random.choice("(mmm)")
        self.bot.say(event.target, mmm)

    def react_with_ooo(self, event):
        """Just yell some Os."""
        self.bot.say(event.target, "O" * random.randint(1, 10))

    def react_with_detector(self, event):
        """Get the last word detector and react to it."""
        words = event.arguments[0].split()
        if len(words) == 0:
            return
        detector_message = self.config.get("detector_message")
        detector_process = self.config.get("detector_process")
        detector_pos = self.config.get("detector_pos")
        detector_neg = self.config.get("detector_neg")
        if any(
            s is None
            for s in (detector_message, detector_process, detector_pos,
                      detector_neg)
        ):
            return
        self.bot.say(event.target, detector_message.format(subject=words[-1]))
        self.bot.say(event.target, detector_process)
        if proc(50):
            self.bot.say(event.target, detector_pos)
        else:
            self.bot.say(event.target, detector_neg)

    def react_with_repeat_letters(self, event):
        """Make sure you understood the biggest word in a stupid way."""
        words = event.arguments[0].split()
        if len(words) == 0:
            return
        biggest_word = sorted(words, key=lambda w: len(w))[-1]
        num_repeats = 2
        repeated = biggest_word[:num_repeats]
        while (
            (not any(letter in repeated for letter in "aeiouy"))
            and len(repeated) < len(biggest_word)
        ):
            num_repeats += 1
            repeated = biggest_word[:num_repeats]
        word = biggest_word[:2] + biggest_word
        question_mark = self.config["question_mark"]
        reply = f"{word}{question_mark}"
        self.bot.say(event.target, reply)