from __future__ import annotations

from typing import TYPE_CHECKING, Optional

import weechat

from slack.log import print_error
from slack.shared import shared
from slack.slack_conversation import invalidate_nicklists
from slack.slack_workspace import SlackWorkspace
from slack.util import get_callback_name
from slack.weechat_config import (
    WeeChatColor,
    WeeChatConfig,
    WeeChatOption,
    WeeChatOptionType,
    WeeChatSection,
)

if TYPE_CHECKING:
    from typing_extensions import Literal


class SlackConfigSectionColor:
    def __init__(self, weechat_config: WeeChatConfig):
        self._section = WeeChatSection(weechat_config, "color")

        self.channel_mention_color = WeeChatOption(
            self._section,
            "channel_mention_color",
            "text color for mentioned channel names in the chat",
            WeeChatColor("blue"),
        )

        self.deleted_message = WeeChatOption(
            self._section,
            "deleted_message",
            "text color for a deleted message",
            WeeChatColor("red"),
        )

        self.disconnected = WeeChatOption(
            self._section,
            "disconnected",
            "text color for the disconnected text",
            WeeChatColor("red"),
        )

        self.edited_message_suffix = WeeChatOption(
            self._section,
            "edited_message_suffix",
            "text color for the suffix after an edited message",
            WeeChatColor("095"),
        )

        self.loading = WeeChatOption(
            self._section,
            "loading",
            "text color for the loading text",
            WeeChatColor("yellow"),
        )

        self.message_join = WeeChatOption(
            self._section,
            "message_join",
            "color for text in join messages",
            WeeChatColor("green"),
            parent_option="irc.color.message_join",
        )

        self.message_quit = WeeChatOption(
            self._section,
            "message_quit",
            "color for text in part messages",
            WeeChatColor("red"),
            parent_option="irc.color.message_quit",
        )

        self.reaction_suffix = WeeChatOption(
            self._section,
            "reaction_suffix",
            "color for the reactions after a message",
            WeeChatColor("darkgray"),
        )

        self.reaction_self_suffix = WeeChatOption(
            self._section,
            "reaction_self_suffix",
            "color for the reactions after a message, for reactions you have added",
            WeeChatColor("blue"),
        )

        self.render_error = WeeChatOption(
            self._section,
            "render_error",
            "color for displaying rendering errors in a message",
            WeeChatColor("red"),
        )

        self.user_mention_color = WeeChatOption(
            self._section,
            "user_mention_color",
            "text color for mentioned user names in the chat",
            WeeChatColor("blue"),
        )

        self.usergroup_mention_color = WeeChatOption(
            self._section,
            "usergroup_mention_color",
            "text color for mentioned user group names in the chat",
            WeeChatColor("blue"),
        )


class SlackConfigSectionLook:
    def __init__(self, weechat_config: WeeChatConfig):
        self._section = WeeChatSection(weechat_config, "look")

        self.bot_user_suffix = WeeChatOption(
            self._section,
            "bot_user_suffix",
            "the suffix appended to nicks to indicate a bot",
            " :]",
        )

        self.thread_broadcast_prefix = WeeChatOption(
            self._section,
            "thread_broadcast_prefix",
            "prefix to distinguish thread messages that were also sent to the channel, when thread_messages_in_channel is enabled",
            "+ ",
        )

        self.color_nicks_in_nicklist = WeeChatOption(
            self._section,
            "color_nicks_in_nicklist",
            "use nick color in nicklist",
            False,
            parent_option="irc.look.color_nicks_in_nicklist",
            callback_change=self.config_change_color_nicks_in_nicklist_cb,
        )

        self.color_message_attachments: WeeChatOption[
            Literal["prefix", "all", "none"]
        ] = WeeChatOption(
            self._section,
            "color_message_attachments",
            "colorize attachments in a message: prefix = only colorize the prefix, all = colorize the whole line, none = don't colorize",
            "prefix",
            string_values=["prefix", "all", "none"],
        )

        self.display_link_previews = WeeChatOption(
            self._section,
            "display_link_previews",
            "display previews of URLs in messages",
            True,
        )

        self.display_reaction_nicks = WeeChatOption(
            self._section,
            "display_reaction_nicks",
            "display the name of the reacting user(s) after each reaction; can be overridden per buffer with the buffer localvar display_reaction_nicks",
            False,
        )

        self.display_thread_replies_in_channel = WeeChatOption(
            self._section,
            "display_thread_replies_in_channel",
            "display thread replies in the parent channel; can be overridden per buffer with the buffer localvar display_thread_replies_in_channel; note that it only takes effect for new messages; note that due to limitations in the Slack API, on load only thread messages for parents that are in the buffer and thread messages in subscribed threads will be displayed (but all thread messages received while connected will be displayed)",
            False,
        )

        self.external_user_suffix = WeeChatOption(
            self._section,
            "external_user_suffix",
            "the suffix appended to nicks to indicate external users",
            "*",
        )

        self.render_emoji_as: WeeChatOption[
            Literal["emoji", "name", "both"]
        ] = WeeChatOption(
            self._section,
            "render_emoji_as",
            "show emojis as: emoji = the emoji unicode character, name = the emoji name, both = both the emoji name and the emoji character",
            "emoji",
            string_values=["emoji", "name", "both"],
        )

        self.replace_space_in_nicks_with = WeeChatOption(
            self._section,
            "replace_space_in_nicks_with",
            "",
            "",
        )

        self.typing_status_nicks = WeeChatOption(
            self._section,
            "typing_status_nicks",
            'display nicks typing on the channel in bar item "typing" (option typing.look.enabled_nicks must be enabled)',
            True,
        )

        self.typing_status_self = WeeChatOption(
            self._section,
            "typing_status_self",
            "send self typing status to channels so that other users see when you are typing a message (option typing.look.enabled_self must be enabled)",
            True,
        )

        weechat.hook_config(
            "weechat.look.nick_color_*",
            get_callback_name(self.config_change_nick_colors_cb),
            "",
        )
        weechat.hook_config(
            "weechat.color.chat_nick_colors",
            get_callback_name(self.config_change_nick_colors_cb),
            "",
        )

    def config_change_color_nicks_in_nicklist_cb(
        self, option: WeeChatOption[WeeChatOptionType], parent_changed: bool
    ):
        invalidate_nicklists()

    def config_change_nick_colors_cb(self, data: str, option: str, value: str):
        invalidate_nicklists()
        return weechat.WEECHAT_RC_OK


class SlackConfigSectionWorkspace:
    def __init__(
        self,
        section: WeeChatSection,
        workspace_name: Optional[str],
        parent_config: Optional[SlackConfigSectionWorkspace],
    ):
        self._section = section
        self._workspace_name = workspace_name
        self._parent_config = parent_config

        self.api_token = self._create_option(
            "api_token",
            "",
            "",
        )

        self.api_cookies = self._create_option(
            "api_cookies",
            "",
            "",
        )

        self.autoconnect = self._create_option(
            "autoconnect",
            "automatically connect to workspace when WeeChat is starting",
            False,
        )

        self.network_timeout = self._create_option(
            "network_timeout",
            "timeout (in seconds) for network requests",
            30,
        )

        self.use_real_names = self._create_option(
            "use_real_names",
            "use real names as the nicks for all users. When this is"
            " false, display names will be used if set, with a fallback"
            " to the real name if display name is not set",
            False,
        )

    def _create_option(
        self,
        name: str,
        description: str,
        default_value: WeeChatOptionType,
        min_value: Optional[int] = None,
        max_value: Optional[int] = None,
        string_values: Optional[list[WeeChatOptionType]] = None,
    ) -> WeeChatOption[WeeChatOptionType]:
        if self._workspace_name:
            option_name = f"{self._workspace_name}.{name}"
        else:
            option_name = name

        if self._parent_config:
            parent_option = getattr(self._parent_config, name, None)
        else:
            parent_option = None

        return WeeChatOption(
            self._section,
            option_name,
            description,
            default_value,
            min_value,
            max_value,
            string_values,
            parent_option,
        )


def config_section_workspace_read_cb(
    data: str, config_file: str, section: str, option_name: str, value: Optional[str]
) -> int:
    option_split = option_name.split(".", 1)
    if len(option_split) < 2:
        return weechat.WEECHAT_CONFIG_OPTION_SET_ERROR
    workspace_name, name = option_split
    if not workspace_name or not name:
        return weechat.WEECHAT_CONFIG_OPTION_SET_ERROR

    if workspace_name not in shared.workspaces:
        shared.workspaces[workspace_name] = SlackWorkspace(workspace_name)

    option = getattr(shared.workspaces[workspace_name].config, name, None)
    if option is None:
        return weechat.WEECHAT_CONFIG_OPTION_SET_OPTION_NOT_FOUND
    if not isinstance(option, WeeChatOption):
        return weechat.WEECHAT_CONFIG_OPTION_SET_ERROR

    if value is None or (
        shared.weechat_version < 0x03080000
        and value == ""
        and option.weechat_type != "string"
    ):
        rc = option.value_set_null()
    else:
        rc = option.value_set_as_str(value)
    if rc == weechat.WEECHAT_CONFIG_OPTION_SET_ERROR:
        print_error(f'error creating workspace option "{option_name}"')
    return rc


def config_section_workspace_write_for_old_weechat_cb(
    data: str, config_file: str, section_name: str
) -> int:
    if not weechat.config_write_line(config_file, section_name, ""):
        return weechat.WEECHAT_CONFIG_WRITE_ERROR

    for workspace in shared.workspaces.values():
        for option in vars(workspace.config).values():
            if isinstance(option, WeeChatOption):
                if (
                    option.weechat_type != "string"
                    or not weechat.config_option_is_null(
                        option._pointer  # pyright: ignore [reportPrivateUsage]
                    )
                ):
                    if not weechat.config_write_option(
                        config_file,
                        option._pointer,  # pyright: ignore [reportPrivateUsage]
                    ):
                        return weechat.WEECHAT_CONFIG_WRITE_ERROR

    return weechat.WEECHAT_CONFIG_WRITE_OK


class SlackConfig:
    def __init__(self):
        self.weechat_config = WeeChatConfig("slack")
        self.color = SlackConfigSectionColor(self.weechat_config)
        self.look = SlackConfigSectionLook(self.weechat_config)
        self._section_workspace_default = WeeChatSection(
            self.weechat_config, "workspace_default"
        )
        # WeeChat < 3.8 sends null as an empty string to callback_read, so in
        # order to distinguish them, don't write the null values to the config
        # See https://github.com/weechat/weechat/pull/1843
        callback_write = (
            get_callback_name(config_section_workspace_write_for_old_weechat_cb)
            if shared.weechat_version < 0x03080000
            else ""
        )
        self._section_workspace = WeeChatSection(
            self.weechat_config,
            "workspace",
            callback_read=get_callback_name(config_section_workspace_read_cb),
            callback_write=callback_write,
        )
        self._workspace_default = SlackConfigSectionWorkspace(
            self._section_workspace_default, None, None
        )

    def config_read(self):
        weechat.config_read(self.weechat_config.pointer)

    def create_workspace_config(self, workspace_name: str):
        if workspace_name in shared.workspaces:
            raise Exception(
                f"Failed to create workspace config, already exists: {workspace_name}"
            )
        return SlackConfigSectionWorkspace(
            self._section_workspace, workspace_name, self._workspace_default
        )