from __future__ import annotations

from typing import TYPE_CHECKING, Optional, Union

from .enums import EmbedType
from .asset import Asset

if TYPE_CHECKING:
    from .state import State
    from .types import Embed as EmbedPayload
    from .types import SendableEmbed as SendableEmbedPayload
    from .types import WebsiteEmbed as WebsiteEmbedPayload
    from .types import ImageEmbed as ImageEmbedPayload
    from .types import TextEmbed as TextEmbedPayload
    from .types import NoneEmbed as NoneEmbedPayload

__all__ = ("Embed", "WebsiteEmbed", "ImageEmbed", "TextEmbed", "NoneEmbed", "to_embed", "SendableEmbed")

class WebsiteEmbed:
    type = EmbedType.website

    def __init__(self, embed: WebsiteEmbedPayload):
        self.url = embed.get("url")
        self.special = embed.get("special")
        self.title = embed.get("title")
        self.description = embed.get("description")
        self.image = embed.get("image")
        self.video = embed.get("video")
        self.site_name = embed.get("site_name")
        self.icon_url = embed.get("icon_url")
        self.colour = embed.get("colour")

class ImageEmbed:
    type = EmbedType.image

    def __init__(self, image: ImageEmbedPayload):
        self.url = image.get("url")
        self.width = image.get("width")
        self.height = image.get("height")
        self.size = image.get("size")

class TextEmbed:
    type = EmbedType.text

    def __init__(self, embed: TextEmbedPayload, state: State):
        self.icon_url = embed.get("icon_url")
        self.url = embed.get("url")
        self.title = embed.get("title")
        self.description = embed.get("description")

        if media := embed.get("media"):
            self.media = Asset(media, state)
        else:
            self.media = None

        self.colour = embed.get("colour")

class NoneEmbed:
    type = EmbedType.none

Embed = Union[WebsiteEmbed, ImageEmbed, TextEmbed, NoneEmbed]

def to_embed(payload: EmbedPayload, state: State) -> Embed:
    if payload["type"] == "Website":
        return WebsiteEmbed(payload)
    elif payload["type"] == "Image":
        return ImageEmbed(payload)
    elif payload["type"] == "Text":
        return TextEmbed(payload, state)
    else:
        return NoneEmbed()

class SendableEmbed:
    def __init__(self, **attrs):
        self.title: Optional[str] = None
        self.description: Optional[str] = None
        self.media: Optional[str] = None
        self.icon_url: Optional[str] = None
        self.colour: Optional[str] = None
        self.url: Optional[str] = None

        for key, value in attrs.items():
            setattr(self, key, value)

    def to_dict(self) -> SendableEmbedPayload:
        output: SendableEmbedPayload = {"type": "Text"}

        if title := self.title:
            output["title"] = title

        if description := self.description:
            output["description"] = description

        if media := self.media:
            output["media"] = media

        if icon_url := self.icon_url:
            output["icon_url"] = icon_url

        if colour := self.colour:
            output["colour"] = colour

        if url := self.url:
            output["url"] = url

        return output