def format_response(data):
    route = data["validated_route"]["route"]
    validity = data["validated_route"]["validity"]
    vrps = validity.get("VRPs", {})
    generated_time = data["generatedTime"]

    # 根据状态选择不同 emoji 和描述
    state_emoji = "✅" if validity["state"] == "valid" else "❌"
    state_str = validity["state"].capitalize()
    
    formatted_text = (
        f"🌐 Route Information\n"
        f"  🏢 Origin ASN: {route['origin_asn']}\n"
        f"  📍 Prefix: {route['prefix']}\n\n"
        f"{state_emoji} Validation Result\n"
        f"  💬 State: {state_str}\n"
        f"  📝 Description: {validity['description']}\n"
    )

    # 添加 Reason 字段（如果存在）
    if "reason" in validity:
        formatted_text += f"  🚫 Reason: {validity['reason'].upper()}\n\n"
    
    formatted_text += "  🔍 VRP Analysis:\n"

    # 处理 Matched VRPs
    if vrps.get("matched"):
        formatted_text += "    ✅ Matched VRPs:\n"
        for vrp in vrps["matched"]:
            formatted_text += (
                f"      🌐 ASN: {vrp['asn']}\n"
                f"      📍 Prefix: {vrp['prefix']}\n"
                f"      🔑 Max Length: {vrp['max_length']}\n"
            )
    else:
        formatted_text += "    ❌ **No Matched VRPs Found**\n"

    # 处理 Unmatched AS VRPs
    if vrps.get("unmatched_as"):
        formatted_text += "    ❌ **Unmatched AS VRPs**:\n"
        for vrp in vrps["unmatched_as"]:
            formatted_text += (
                f"      🌐 **ASN**: {vrp['asn']}\n"
                f"      📍 **Prefix**: {vrp['prefix']}\n"
                f"      🔑 **Max Length**: {vrp['max_length']}\n"
            )
    else:
        formatted_text += "    ✅ **No Unmatched AS Found**\n"

    # 处理 Unmatched Length VRPs
    if vrps.get("unmatched_length"):
        formatted_text += "    ❌ **Unmatched Length VRPs**:\n"
        for vrp in vrps["unmatched_length"]:
            formatted_text += (
                f"      🌐 **ASN**: {vrp['asn']}\n"
                f"      📍 **Prefix**: {vrp['prefix']}\n"
                f"      🔑 **Max Length**: {vrp['max_length']}\n"
            )
    else:
        formatted_text += "    ✅ No Unmatched Length Found\n"

    formatted_text += f"\n⏳ Generated Time: {generated_time}"

    return formatted_text