import type { CustomBlockInitErrorCode } from "../../bridge/messages/init.js"
import type { ReadyMessage } from "../../bridge/messages/ready.js"

export type ReadyInitFailure = {
	code: CustomBlockInitErrorCode
	message?: string
}

export function getReadyInitFailure(
	message: ReadyMessage,
	minBridgeProtocolVersion: number,
): ReadyInitFailure | undefined {
	if (!isValidBridgeProtocolVersion(message.bridgeProtocolVersion)) {
		return {
			code: "invalid_protocol_version",
			message: `Sandbox reported invalid bridge protocol version ${message.bridgeProtocolVersion}.`,
		}
	}
	if (message.bridgeProtocolVersion < minBridgeProtocolVersion) {
		return {
			code: "unsupported_protocol_version",
			message: `Sandbox bridge protocol version ${message.bridgeProtocolVersion} is below the host minimum ${minBridgeProtocolVersion}.`,
		}
	}
	if (message.status === "error") {
		return {
			code: message.error.code,
			message: message.error.message,
		}
	}
	return undefined
}

function isValidBridgeProtocolVersion(version: number): boolean {
	return Number.isFinite(version) && Number.isInteger(version) && version >= 1
}