# -*- coding: utf-8 -*-
import contextlib
from asyncio import sleep
from typing import Optional, List, Dict, Tuple, Union
from functools import reduce

from pyrogram.enums import MessageEntityType, ParseMode
from pyrogram.raw.functions.messages import SendReaction
from pyrogram.raw.types import ReactionEmoji, ReactionCustomEmoji, User
from pyrogram.types import MessageEntity

from pagermaid.dependence import sqlite
from pagermaid.listener import listener
from pagermaid.enums import Client, Message
from pagermaid.utils import pip_install

pip_install("emoji")

import emoji

NATIVE_EMOJI = b"\xf0\x9f\x91\x8d\xf0\x9f\x91\x8e\xe2\x9d\xa4\xef\xb8\x8f\xf0\x9f\x94\xa5\xf0\x9f\xa5\xb0\xf0\x9f\x91\x8f\xf0\x9f\x98\x81\xf0\x9f\xa4\x94\xf0\x9f\xa4\xaf\xf0\x9f\x98\xb1\xf0\x9f\xa4\xac\xf0\x9f\x98\xa2\xf0\x9f\x8e\x89\xf0\x9f\xa4\xa9\xf0\x9f\xa4\xae\xf0\x9f\x92\xa9\xf0\x9f\x99\x8f\xf0\x9f\x91\x8c\xf0\x9f\x95\x8a\xf0\x9f\xa4\xa1\xf0\x9f\xa5\xb1\xf0\x9f\xa5\xb4\xf0\x9f\x98\x8d\xf0\x9f\x90\xb3\xe2\x9d\xa4\xef\xb8\x8f\xe2\x80\x8d\xf0\x9f\x94\xa5\xf0\x9f\x8c\x9a\xf0\x9f\x8c\xad\xf0\x9f\x92\xaf\xf0\x9f\xa4\xa3\xe2\x9a\xa1\xef\xb8\x8f\xf0\x9f\x8d\x8c\xf0\x9f\x8f\x86\xf0\x9f\x92\x94\xf0\x9f\xa4\xa8\xf0\x9f\x98\x90\xf0\x9f\x8d\x93\xf0\x9f\x8d\xbe\xf0\x9f\x92\x8b\xf0\x9f\x96\x95\xf0\x9f\x98\x88\xf0\x9f\x98\x82\xf0\x9f\x98\xad".decode()
SPECIAL_EMOJI = "❤⬅↔➡⬆↕⬇"  # TO BE ADDED
USAGE = f"""```Usage:
  Reply to a message:
    Trace      : .trace 👍👎🥰
    Untrace    : .trace
  Trace keyword: .trace kw add 👍👎🥰
  Del keyword  : .trace kw del

  List all   : .trace status
  Untrace all: .trace clean

  Keep log   : .trace log [true|false]
  Toggle big : .trace big [true|false]

  Use with caution:
    Reset all  : .trace resettrace
```
**Available native emojis:** {NATIVE_EMOJI}
"""

cached_sqlite = {
    key: value for key, value in sqlite.items() if key.startswith("trace.")
}

if cached_sqlite.get("trace.config.keep_log", None) is None:
    sqlite["trace.config.keep_log"] = True
    cached_sqlite["trace.config.keep_log"] = True

if cached_sqlite.get("trace.config.big", None) is None:
    sqlite["trace.config.big"] = True
    cached_sqlite["trace.config.big"] = True


async def edit_and_delete(
    message: Message,
    text: str,
    entities: List[MessageEntity] = None,
    seconds=5,
    parse_mode: ParseMode = ParseMode.DEFAULT,
):
    if entities is None:
        entities = []
    await message.edit(text, entities=entities, parse_mode=parse_mode)
    if seconds == -1 or cached_sqlite["trace.config.keep_log"]:
        return
    await sleep(seconds)
    return await message.delete()


async def print_usage(message: Message):
    return await edit_and_delete(message, USAGE, [], 15, ParseMode.MARKDOWN)


async def get_users_by_userids(client: Client, uids) -> List[User]:
    return await client.get_users(uids)


async def get_all_traced(client: Client) -> Dict:
    uid_reactions = {
        int(key.split("trace.user_id.")[1]): {"reactions": value}
        for key, value in cached_sqlite.items()
        if key.startswith("trace.user_id.")
    }

    user_info = await get_users_by_userids(client, uid_reactions.keys())
    for user in user_info:
        uid_reactions[user.id]["user"] = user
    return uid_reactions


def count_offset(text: str) -> int:
    return sum(
        1
        if c in SPECIAL_EMOJI or c not in SPECIAL_EMOJI and not emoji.is_emoji(c)
        else 2
        for c in text
    )


def append_emoji_to_text(
    text: str,
    reaction_list: List[Union[ReactionEmoji, ReactionCustomEmoji]],
    entities: List[MessageEntity],
):
    if reaction_list is None:
        return text, entities
    text += "["
    for reaction in reaction_list:
        if type(reaction) is ReactionEmoji:
            text += f"{reaction.emoticon}, "
        elif type(reaction) is ReactionCustomEmoji:
            entities.append(
                MessageEntity(
                    type=MessageEntityType.CUSTOM_EMOJI,
                    offset=count_offset(text),
                    length=2,
                    custom_emoji_id=reaction.document_id,
                )
            )
            text += "👋, "
        else:  # Would it reach here?
            text += str(reaction)
    text = text[:-2] + "]\n"
    return text, entities


def get_keyword_emojis_from_message(message) -> Tuple[str, List[Union[str, int]]]:
    return (message.parameter[0], get_emojis_from_message(message)) if message else None


def get_emojis_from_message(message: Message) -> Optional[List[Union[str, int]]]:
    if not message:
        return None

    emoji_list = []
    index = 0
    entity_i = 0
    # Parse input to preserve order.
    # TODO: Can be more elegant
    for c in message.text:
        if len(emoji_list) == 3:
            break
        if emoji.is_emoji(c):
            if (
                message.entities
                and len(message.entities) - 1 >= entity_i
                and message.entities[entity_i].type == MessageEntityType.CUSTOM_EMOJI
                and message.entities[entity_i].offset == index
            ):
                emoji_list.append(message.entities[entity_i].custom_emoji_id)
                entity_i += 1
            else:
                emoji_list.append(c)
            index += 2
            if c in SPECIAL_EMOJI:
                index -= 1
        else:
            index += 1
    return emoji_list


def get_name_and_username_from_message(message: Message):
    other_name = ""
    if message.reply_to_message.from_user.first_name:
        other_name += message.reply_to_message.from_user.first_name
    if message.reply_to_message.from_user.last_name:
        other_name += message.reply_to_message.from_user.last_name
    other_username = message.reply_to_message.from_user.username
    return other_name, other_username


def append_username_to_text(
    text: str,
    other_name: str,
    other_username: str,
    entities: List[MessageEntity],
    message: Message,
    user: Optional[User] = None,
):
    if other_username:
        entities.append(
            MessageEntity(
                type=MessageEntityType.MENTION,
                offset=count_offset(text) + 2,
                length=count_offset(other_username),
            )
        )
        text += f"  @{other_username}"
    elif other_name:
        if user:
            entities.append(
                MessageEntity(
                    type=MessageEntityType.TEXT_MENTION,
                    offset=count_offset(text) + 2,
                    length=count_offset(other_name),
                    user=user,
                )
            )
        else:
            entities.append(
                MessageEntity(
                    type=MessageEntityType.TEXT_MENTION,
                    offset=count_offset(text) + 2,
                    length=count_offset(other_name),
                    user=message.reply_to_message.from_user,
                )
            )
        text += f"  {other_name}"
    else:
        text += "Some unknown ghost"
    text += ": "
    return text, entities


def new_bold_string_entities(text: str) -> Tuple[str, List[MessageEntity]]:
    return append_bold_string("", text, [])


def append_bold_string(
    text: str, append_text: str, entities: List[MessageEntity]
) -> Tuple[str, List[MessageEntity]]:
    entities.append(
        MessageEntity(
            type=MessageEntityType.BOLD,
            offset=count_offset(text),
            length=count_offset(append_text),
        )
    )
    text += append_text
    return text, entities


async def gen_reaction_list(emojis, bot: Client):
    me = bot.me or await bot.get_me()
    reaction_list = []
    if not me.is_premium:  # Remove custom emojis if not premium (will it happen?)
        emojis = [x for x in emojis if type(x) is not int]
    emojis = reduce(
        lambda x, y: x if y in x else x + [y],
        [
            [],
        ]
        + emojis,
    )  # Remove replicated
    for emoji in emojis:
        if type(emoji) is int:
            reaction_list.append(ReactionCustomEmoji(document_id=emoji))
        elif type(emoji) is str and emoji in NATIVE_EMOJI:
            reaction_list.append(ReactionEmoji(emoticon=emoji))
    return reaction_list


def append_config(
    text: str, entities: List[MessageEntity]
) -> Tuple[str, List[MessageEntity]]:
    entities.append(
        MessageEntity(
            type=MessageEntityType.BOLD,
            offset=count_offset(text),
            length=len(f"\nKeep log: \n  {cached_sqlite['trace.config.keep_log']}"),
        )
    )
    text += f"\nKeep log: \n  {cached_sqlite['trace.config.keep_log']}"

    entities.append(
        MessageEntity(
            type=MessageEntityType.BOLD,
            offset=count_offset(text),
            length=len(f"\nUse big : \n  {cached_sqlite['trace.config.keep_log']}"),
        )
    )
    text += f"\nUse big : \n  {cached_sqlite['trace.config.keep_log']}"
    return text, entities


@listener(command="trace", need_admin=True, diagnostics=False, description=USAGE)
async def trace(bot: Client, message: Message):
    """
    # For debug use
    if len(message.parameter) and message.parameter[0] == "magicword":
        return await message.edit(str(message))
    """
    if len(message.parameter) == 0:  # Either untrace someone or throw error
        if (
            message.reply_to_message is None
            or message.reply_to_message.from_user is None
        ):
            return await print_usage(message)
        other_id = message.reply_to_message.from_user.id
        if not cached_sqlite.get(f"trace.user_id.{other_id}", None):
            return await edit_and_delete(
                message, "This user is not in the traced list."
            )
        prev_emojis = cached_sqlite.get(f"trace.user_id.{other_id}", None)

        del sqlite[f"trace.user_id.{other_id}"]
        del cached_sqlite[f"trace.user_id.{other_id}"]

        text, entities = new_bold_string_entities("Successfully untraced: \n")
        other_name, other_username = get_name_and_username_from_message(message)
        text, entities = append_username_to_text(
            text, other_name, other_username, entities, message
        )
        text, entities = append_emoji_to_text(text, prev_emojis, entities)
        return await edit_and_delete(
            message, text, entities=entities, seconds=5, parse_mode=ParseMode.MARKDOWN
        )
    elif len(message.parameter) == 1:
        if message.parameter[0] in ["status", "clean"]:  # Get all traced info
            traced_uids = await get_all_traced(bot)
            text, entities = (
                new_bold_string_entities("Traced userlist:\n")
                if message.parameter[0] == "status"
                else new_bold_string_entities("Successfully untraced: \n")
            )

            for traced_uid in traced_uids.keys():
                other_name = ""
                if traced_uids[traced_uid]["user"].first_name:
                    other_name += traced_uids[traced_uid]["user"].first_name
                if traced_uids[traced_uid]["user"].last_name:
                    other_name += traced_uids[traced_uid]["user"].last_name
                other_username = traced_uids[traced_uid]["user"].username

                text, entities = append_username_to_text(
                    text,
                    other_name,
                    other_username,
                    entities,
                    message,
                    traced_uids[traced_uid]["user"],
                )
                text, entities = append_emoji_to_text(
                    text, traced_uids[traced_uid]["reactions"], entities
                )

            text, entities = append_bold_string(text, "\nTraced keywords: \n", entities)
            if traced_keywords := cached_sqlite.get("trace.keywordlist", None):
                for keyword in traced_keywords:
                    reaction_list = cached_sqlite.get(
                        f"trace.keyword.{keyword.encode().hex()}", None
                    )
                    text += f"  {keyword}: "
                    text, entities = append_emoji_to_text(text, reaction_list, entities)
            if message.parameter[0] == "status":
                text, entities = append_config(text, entities)
            if message.parameter[0] == "clean":
                for k, v in cached_sqlite:
                    if k.startswith("trace."):
                        del cached_sqlite[k]
                        del sqlite[k]
            return await edit_and_delete(
                message,
                text,
                entities=entities,
                seconds=5,
                parse_mode=ParseMode.MARKDOWN,
            )
        elif message.parameter[0] == "resettrace":
            for k, v in cached_sqlite:
                if k.startswith("trace."):
                    del cached_sqlite[k]
                    del sqlite[k]
            return await edit_and_delete(
                message,
                "**Database has been reset.**",
                seconds=5,
                parse_mode=ParseMode.MARKDOWN,
            )
        else:
            if emojis := get_emojis_from_message(message):
                reaction_list = await gen_reaction_list(emojis, bot)
                if reaction_list:
                    sqlite[
                        f"trace.user_id.{message.reply_to_message.from_user.id}"
                    ] = reaction_list
                    cached_sqlite[
                        f"trace.user_id.{message.reply_to_message.from_user.id}"
                    ] = reaction_list
                    await bot.invoke(
                        SendReaction(
                            peer=await bot.resolve_peer(int(message.chat.id)),
                            msg_id=message.reply_to_message_id,
                            reaction=reaction_list,
                            big=cached_sqlite["trace.config.big"],
                        )
                    )
                    text = "Successfully traced: \n"
                    # TODO: Add username
                    text, entities = append_emoji_to_text(text, reaction_list, [])
                    return await edit_and_delete(
                        message,
                        text,
                        entities=entities,
                        seconds=5,
                        parse_mode=ParseMode.MARKDOWN,
                    )
                return await edit_and_delete(message, "No valid emojis found!")
            return await print_usage(message)
    elif len(message.parameter) == 2:  # log t|f; kw del
        if message.parameter[0] == "log":
            if message.parameter[1] == "true":
                sqlite["trace.config.keep_log"] = True
                cached_sqlite["trace.config.keep_log"] = True
            elif message.parameter[1] == "false":
                sqlite["trace.config.keep_log"] = False
                cached_sqlite["trace.config.keep_log"] = False
            else:
                return await print_usage(message)
            return await message.edit(
                str(f"**Keep log: \n  {cached_sqlite['trace.config.keep_log']}**")
            )
        if message.parameter[0] == "big":
            if message.parameter[1] == "true":
                sqlite["trace.config.big"] = True
                cached_sqlite["trace.config.big"] = True
            elif message.parameter[1] == "false":
                sqlite["trace.config.big"] = False
                cached_sqlite["trace.config.big"] = False
            else:
                return await print_usage(message)
            return await message.edit(
                str(f"**Use big : \n  {cached_sqlite['trace.config.big']}**")
            )
        elif message.parameter[1] == "del":
            keyword = message.parameter[0]
            keyword_encoded_hex = keyword.encode().hex()
            keywordlist = cached_sqlite["trace.keywordlist"]
            if keyword not in keywordlist:
                return await edit_and_delete(
                    message, f'Keyword "{keyword}" is not traced.\n{keywordlist}'
                )
            if not cached_sqlite.get(f"trace.keyword.{keyword_encoded_hex}"):
                return await edit_and_delete(
                    message, f'Keyword "{keyword}" is not traced.'
                )

            prev_emojis = cached_sqlite.get(f"trace.keyword.{keyword_encoded_hex}")
            keywordlist.remove(keyword)
            sqlite["trace.keywordlist"] = keywordlist
            cached_sqlite["trace.keywordlist"] = keywordlist
            del sqlite[f"trace.keyword.{keyword_encoded_hex}"]
            del cached_sqlite[f"trace.keyword.{keyword_encoded_hex}"]

            text, entities = new_bold_string_entities(
                "Successfully untraced keyword: \n"
            )
            text += f"  {keyword}: "
            text, entities = append_emoji_to_text(text, prev_emojis, entities)
            return await edit_and_delete(
                message,
                text,
                entities=entities,
                seconds=5,
                parse_mode=ParseMode.MARKDOWN,
            )
        else:
            return await print_usage(message)
    elif len(message.parameter) == 3:
        keyword, emojis = get_keyword_emojis_from_message(message)
        keyword_encoded_hex = keyword.encode().hex()
        if keyword and len(emojis) != 0:
            reaction_list = await gen_reaction_list(emojis, bot)
            if reaction_list:
                sqlite[f"trace.keyword.{keyword_encoded_hex}"] = reaction_list
                cached_sqlite[f"trace.keyword.{keyword_encoded_hex}"] = reaction_list

                if cached_sqlite.get("trace.keywordlist", None) is None:
                    sqlite["trace.keywordlist"] = [keyword]
                    cached_sqlite["trace.keywordlist"] = [keyword]
                elif keyword not in cached_sqlite["trace.keywordlist"]:
                    cached_sqlite["trace.keywordlist"].append(keyword)
                    sqlite["trace.keywordlist"] = cached_sqlite["trace.keywordlist"]

                text, entities = new_bold_string_entities(
                    "Successfully traced keyword: \n"
                )
                text += f"  {keyword}: "
                text, entities = append_emoji_to_text(text, reaction_list, entities)
                return await edit_and_delete(
                    message,
                    text,
                    entities=entities,
                    seconds=5,
                    parse_mode=ParseMode.MARKDOWN,
                )
            return await edit_and_delete(message, "No valid emojis found!")
    else:
        return await print_usage(message)


@listener(incoming=True, outgoing=False, ignore_edited=True)
async def trace_user(client: Client, message: Message):
    if message.from_user is None:
        return
    with contextlib.suppress(Exception):
        if reaction_list := cached_sqlite.get(
            f"trace.user_id.{message.from_user.id}", None
        ):
            await client.invoke(
                SendReaction(
                    peer=await client.resolve_peer(int(message.chat.id)),
                    msg_id=message.id,
                    reaction=reaction_list,
                    big=cached_sqlite["trace.config.big"],
                )
            )


@listener(incoming=True, outgoing=True, ignore_edited=True)
async def trace_keyword(client: Client, message: Message):
    if message.from_user is None:
        return
    with contextlib.suppress(Exception):
        if message.text:
            if keyword_list := cached_sqlite.get("trace.keywordlist", None):
                for keyword in keyword_list:
                    if keyword in message.text:
                        if reaction_list := cached_sqlite.get(
                            f"trace.keyword.{keyword.encode().hex()}", None
                        ):
                            await client.invoke(
                                SendReaction(
                                    peer=await client.resolve_peer(
                                        int(message.chat.id)
                                    ),
                                    msg_id=message.id,
                                    reaction=reaction_list,
                                    big=cached_sqlite["trace.config.big"],
                                )
                            )