from babel.support import LazyProxy
from inspect import iscoroutinefunction, signature
from aiogram.types import Message, CallbackQuery
from aiogram.utils.i18n import I18n
from typing import Any, TYPE_CHECKING
import ujson as json

from ..model.bot_entity import BotEntity
from ..model.bot_enum import BotEnum
from ..model.settings import Settings

from ..model.descriptors import (
    FieldDescriptor,
    EntityDescriptor,
    EntityItemCaptionCallable,
    EntityFieldCaptionCallable,
    EntityPermission,
    EntityCaptionCallable,
)

from ..bot.handlers.context import ContextData, CommandContext

if TYPE_CHECKING:
    from ..model.user import UserBase
    from ..main import QBotApp


def get_user_permissions(
    user: "UserBase", entity_descriptor: EntityDescriptor
) -> list[EntityPermission]:
    permissions = list[EntityPermission]()
    for permission, roles in entity_descriptor.permissions.items():
        for role in roles:
            if role in user.roles:
                permissions.append(permission)
                break
    return permissions


def get_local_text(text: str, locale: str = None) -> str:
    if not locale:
        i18n = I18n.get_current(no_error=True)
        if i18n:
            locale = i18n.current_locale
        else:
            locale = "en"
    try:
        obj = json.loads(text)  # @IgnoreException
    except Exception:
        return text
    else:
        return obj.get(locale, obj[list(obj.keys())[0]])


def check_entity_permission(
    entity: BotEntity, user: "UserBase", permission: EntityPermission
) -> bool:
    perm_mapping = {
        EntityPermission.LIST: EntityPermission.LIST_ALL,
        EntityPermission.READ: EntityPermission.READ_ALL,
        EntityPermission.UPDATE: EntityPermission.UPDATE_ALL,
        EntityPermission.CREATE: EntityPermission.CREATE_ALL,
        EntityPermission.DELETE: EntityPermission.DELETE_ALL,
    }

    if permission not in perm_mapping:
        raise ValueError(f"Invalid permission: {permission}")

    entity_descriptor = entity.__class__.bot_entity_descriptor
    permissions = get_user_permissions(user, entity_descriptor)

    if perm_mapping[permission] in permissions:
        return True

    ownership_filds = entity_descriptor.ownership_fields

    for role in user.roles:
        if role in ownership_filds:
            if getattr(entity, ownership_filds[role]) == user.id:
                return True
        else:
            if permission in permissions:
                return True

    return False


def get_send_message(message: Message | CallbackQuery):
    if isinstance(message, Message):
        return message.answer
    else:
        return message.message.edit_text


def clear_state(state_data: dict, clear_nav: bool = False):
    if clear_nav:
        state_data.clear()
    else:
        stack = state_data.get("navigation_stack")
        context = state_data.get("navigation_context")
        state_data.clear()
        if stack:
            state_data["navigation_stack"] = stack
        if context:
            state_data["navigation_context"] = context


async def get_entity_item_repr(
    entity: BotEntity, item_repr: EntityItemCaptionCallable | None = None
) -> str:
    descr = entity.bot_entity_descriptor
    if item_repr:
        return item_repr(descr, entity)
    return (
        descr.item_repr(descr, entity)
        if descr.item_repr
        else f"{
            await get_callable_str(descr.full_name, descr, entity)
            if descr.full_name
            else descr.name
        }: {str(entity.id)}"
    )


async def get_value_repr(
    value: Any, field_descriptor: FieldDescriptor, locale: str | None = None
) -> str:
    if value is None:
        return ""

    type_ = field_descriptor.type_base
    if isinstance(value, bool):
        return "【✔︎】" if value else "【 】"
    elif field_descriptor.is_list:
        if issubclass(type_, BotEntity):
            return (
                f"[{', '.join([await get_entity_item_repr(item) for item in value])}]"
            )
        elif issubclass(type_, BotEnum):
            return f"[{', '.join(item.localized(locale) for item in value)}]"
        elif type_ is str:
            return f"[{', '.join([f'"{item}"' for item in value])}]"
        else:
            return f"[{', '.join([str(item) for item in value])}]"
    elif issubclass(type_, BotEntity):
        return await get_entity_item_repr(value)
    elif issubclass(type_, BotEnum):
        return value.localized(locale)
    elif isinstance(value, str):
        if field_descriptor and field_descriptor.localizable:
            return get_local_text(text=value, locale=locale)
        return value
    elif isinstance(value, int):
        return str(value)
    elif isinstance(value, float):
        return str(value)
    else:
        return str(value)


async def get_callable_str(
    callable_str: (
        str
        | LazyProxy
        | EntityCaptionCallable
        | EntityItemCaptionCallable
        | EntityFieldCaptionCallable
    ),
    descriptor: FieldDescriptor | EntityDescriptor,
    entity: Any = None,
    value: Any = None,
) -> str:
    if isinstance(callable_str, str):
        return callable_str
    elif isinstance(callable_str, LazyProxy):
        return callable_str.value
    elif callable(callable_str):
        args = signature(callable_str).parameters
        if iscoroutinefunction(callable_str):
            if len(args) == 1:
                return await callable_str(descriptor)
            elif len(args) == 2:
                return await callable_str(descriptor, entity)
            elif len(args) == 3:
                return await callable_str(descriptor, entity, value)
        else:
            if len(args) == 1:
                return callable_str(descriptor)
            elif len(args) == 2:
                return callable_str(descriptor, entity)
            elif len(args) == 3:
                return callable_str(descriptor, entity, value)


def get_entity_descriptor(
    app: "QBotApp", callback_data: ContextData
) -> EntityDescriptor:
    if callback_data.entity_name:
        return app.entity_metadata.entity_descriptors[callback_data.entity_name]
    return None


def get_field_descriptor(
    app: "QBotApp", callback_data: ContextData
) -> FieldDescriptor | None:
    if callback_data.context == CommandContext.SETTING_EDIT:
        return Settings.list_params()[callback_data.field_name]
    elif callback_data.context == CommandContext.COMMAND_FORM:
        command = app.bot_commands[callback_data.user_command.split("&")[0]]
        if (
            command
            and command.param_form
            and callback_data.field_name in command.param_form
        ):
            return command.param_form[callback_data.field_name]
    elif callback_data.context in [
        CommandContext.ENTITY_CREATE,
        CommandContext.ENTITY_EDIT,
        CommandContext.ENTITY_FIELD_EDIT,
    ]:
        entity_descriptor = get_entity_descriptor(app, callback_data)
        if entity_descriptor:
            return entity_descriptor.fields_descriptors.get(callback_data.field_name)
    return None