import typing
from enum import Enum

from telegram import InlineKeyboardButton, InlineKeyboardMarkup

from apps.alerts.models import AlertGroup
from apps.telegram.utils import CallbackQueryFactory


class Action(Enum):
    ACKNOWLEDGE = "acknowledge"
    UNACKNOWLEDGE = "unacknowledge"
    RESOLVE = "resolve"
    UNRESOLVE = "unresolve"
    SILENCE = "silence"
    UNSILENCE = "unsilence"


ACTION_TO_CODE_MAP = {
    Action.ACKNOWLEDGE.value: 0,
    Action.UNACKNOWLEDGE.value: 1,
    Action.RESOLVE.value: 2,
    Action.UNRESOLVE.value: 3,
    Action.SILENCE.value: 4,
    Action.UNSILENCE.value: 5,
}

CODE_TO_ACTION_MAP = {
    0: Action.ACKNOWLEDGE.value,
    1: Action.UNACKNOWLEDGE.value,
    2: Action.RESOLVE.value,
    3: Action.UNRESOLVE.value,
    4: Action.SILENCE.value,
    5: Action.UNSILENCE.value,
}


class TelegramKeyboardRenderer:
    def __init__(self, alert_group: AlertGroup):
        self.alert_group = alert_group

    # Inline keyboard with controls for alert group message
    def render_actions_keyboard(self) -> typing.Optional[InlineKeyboardMarkup]:
        if self.alert_group.root_alert_group is not None:
            # No keyboard for attached alert group
            return None

        rows = []

        # Acknowledge/Unacknowledge button
        if not self.alert_group.resolved:
            rows.append([self.acknowledge_button])

        # Resolve/Unresolve buttons
        rows.append([self.resolve_button])

        # Silence/Unsilence buttons
        if not self.alert_group.resolved:
            if not self.alert_group.silenced:
                rows.append(self.silence_buttons)
            else:
                rows.append([self.unsilence_button])

        return InlineKeyboardMarkup(rows)

    @staticmethod
    def render_link_to_channel_keyboard(link: str) -> InlineKeyboardMarkup:
        button = InlineKeyboardButton(text="Go to the alert group", url=link)
        return InlineKeyboardMarkup([[button]])

    @property
    def acknowledge_button(self) -> InlineKeyboardButton:
        action = Action.ACKNOWLEDGE if not self.alert_group.acknowledged else Action.UNACKNOWLEDGE
        return self._render_button(text=action.value.capitalize(), action=action)

    @property
    def resolve_button(self) -> InlineKeyboardButton:
        action = Action.RESOLVE if not self.alert_group.resolved else Action.UNRESOLVE
        return self._render_button(text=action.value.capitalize(), action=action)

    @property
    def silence_buttons(self) -> typing.List[InlineKeyboardButton]:
        silence_forever_button = self._render_button(text="🔕 forever", action=Action.SILENCE)

        silence_delay_one_hour = 3600  # one hour
        silence_one_hour_button = self._render_button(
            text="... for 1h", action=Action.SILENCE, action_data=silence_delay_one_hour
        )

        silence_delay_four_hours = 14400  # four hours
        silence_four_hours_button = self._render_button(
            text="... for 4h", action=Action.SILENCE, action_data=silence_delay_four_hours
        )

        return [silence_forever_button, silence_one_hour_button, silence_four_hours_button]

    @property
    def unsilence_button(self) -> InlineKeyboardButton:
        return self._render_button(text=Action.UNSILENCE.value.capitalize(), action=Action.UNSILENCE)

    def _render_button(self, text: str, action: Action, action_data: typing.Optional[typing.Union[int, str]] = None):
        action_code = ACTION_TO_CODE_MAP[action.value]
        callback_data_args: typing.List[typing.Union[int, str]] = [self.alert_group.pk, action_code]
        if action_data is not None:
            callback_data_args.append(action_data)
        # Add org id with 'oncall' prefix to callback data.
        # It's a workaround to pass oncall-uuid to the oncall-gateway while proxying requests.
        # TODO: check if it's possible switch to json str instead of ':' separated string.
        # Note, that there is a 64bytes limit to callback data
        callback_data_args.append(f"oncall-uuid{self.alert_group.channel.organization.uuid}")
        button = InlineKeyboardButton(text=text, callback_data=CallbackQueryFactory.encode_data(*callback_data_args))

        return button