from __future__ import annotations


def build_bubble_message(
    header_text: str | None = None,
    body_sections: list[dict] | None = None,
    footer_text: str | None = None,
    hero_url: str | None = None,
    alt_text: str = "Flex Message",
) -> dict:
    contents: dict = {"type": "bubble"}

    if hero_url:
        contents["hero"] = {
            "type": "image",
            "url": hero_url,
            "size": "full",
            "aspectRatio": "20:13",
            "aspectMode": "cover",
        }

    if header_text:
        contents["header"] = {
            "type": "box",
            "layout": "vertical",
            "contents": [{"type": "text", "text": header_text, "weight": "bold", "size": "lg"}],
        }

    if body_sections:
        contents["body"] = {
            "type": "box",
            "layout": "vertical",
            "contents": list(body_sections),
        }

    if footer_text:
        contents["footer"] = {
            "type": "box",
            "layout": "vertical",
            "contents": [{"type": "text", "text": footer_text, "size": "sm", "color": "#aaaaaa"}],
        }

    return {
        "type": "flex",
        "altText": alt_text[:400],
        "contents": contents,
    }


def build_carousel_message(bubbles: list[dict], alt_text: str = "Carousel Message") -> dict:
    return {
        "type": "flex",
        "altText": alt_text[:400],
        "contents": {
            "type": "carousel",
            "contents": bubbles[:12],
        },
    }