from __future__ import annotations

from yuxi.channels.models import ChannelIdentity


def format_inbound_envelope(
    identity: ChannelIdentity,
    sender_name: str = "",
    chat_name: str = "",
    reply_context: dict | None = None,
) -> str:
    """生成标准入站信封格式。

    格式示例：
        [From: Alice (alice@icloud.com)] @Family Chat
    """
    parts: list[str] = []

    sender_display = sender_name or identity.channel_user_id
    parts.append(f"[From: {sender_display}")

    if identity.channel_user_id != sender_display:
        parts.append(f" ({identity.channel_user_id})")

    parts.append("]")

    if chat_name:
        parts.append(f" @{chat_name}")

    if reply_context:
        reply_to_id = reply_context.get("reply_to_message_id")
        reply_to_text = reply_context.get("reply_to_text")
        if reply_to_text:
            preview = reply_to_text[:80].replace("\n", " ")
            parts.append(f"\n  > Replying to: {preview}")
        elif reply_to_id:
            parts.append(f"\n  > Replying to message id:{reply_to_id}")

    return "".join(parts)