import type {
	CustomBlockInitErrorCode,
	CustomBlockInitErrorInfo,
} from "../../bridge/messages/init.js"

const UNKNOWN_ERROR_MESSAGE =
	"Unexpected error while initializing custom block."

/**
 * Returns the error info for a given `init` failure code.
 *
 * `init` handshakes are one-shot: after an `init` error, this host instance will not answer another
 * `ready` message. `isRetryable` means a fresh iframe / `init` attempt could plausibly succeed
 * without changing block code or host configuration.
 */
export function initErrorForFailureReason(
	reason: CustomBlockInitErrorCode,
): CustomBlockInitErrorInfo {
	switch (reason) {
		case "no_ready":
			return {
				code: reason,
				message: "Sandbox did not send a ready message.",
				isRetryable: true,
			}
		case "invalid_ready":
			return {
				code: reason,
				message: "Sandbox sent an invalid ready message.",
				// The sandbox must be updated to send a valid ready message.
				isRetryable: false,
			}
		case "manifest_unavailable":
			return {
				code: reason,
				message: "Sandbox could not load its manifest.",
				isRetryable: true,
			}
		case "manifest_invalid":
			return {
				code: reason,
				message: "Sandbox sent an invalid manifest.",
				// The sandbox must be updated to a valid manifest.
				isRetryable: false,
			}
		case "invalid_protocol_version":
			return {
				code: reason,
				message: "Sandbox reported an invalid bridge protocol version.",
				// The sandbox must be updated to a supported protocol version.
				isRetryable: false,
			}
		case "unsupported_protocol_version":
			return {
				code: reason,
				message: "Sandbox bridge protocol version is not supported.",
				// The sandbox must be updated to a supported protocol version.
				isRetryable: false,
			}
		case "context_unavailable":
			return {
				code: reason,
				message: "Host page context is unavailable.",
				isRetryable: true,
			}
		case "current_user_unavailable":
			return {
				code: reason,
				message: "Current user is unavailable.",
				isRetryable: true,
			}
		case "missing_data_source_binding":
			return {
				code: reason,
				message: "A required data source is not mapped.",
				// Host configuration must be changed before this block can initialize.
				isRetryable: false,
			}
		case "data_source_unavailable":
			return {
				code: reason,
				message: "A mapped data source is unavailable.",
				// This error combines some retryable errors (e.g. data source failed to load) with
				// some non-retryable errors (e.g. data source does not exist or user does not have
				// access). Fallback to assuming the error is retryable.
				isRetryable: true,
			}
		case "missing_property_binding":
			return {
				code: reason,
				message: "A required data source property is not mapped.",
				// Host configuration must be changed before this block can initialize.
				isRetryable: false,
			}
		case "invalid_property_binding":
			return {
				code: reason,
				message: "A mapped data source property is missing or incompatible.",
				// The bound property's schema must be updated or the binding must be updated to
				// a property with a compatible schema.
				isRetryable: false,
			}
		case "not_in_iframe":
			return {
				code: reason,
				message: "<NotionCustomBlock> only works inside an iframe.",
				// The block must be embedded in an iframe.
				isRetryable: false,
			}
		case "init_timeout":
			return {
				code: reason,
				message: "Host did not respond to init before the timeout.",
				isRetryable: true,
			}
		case "unknown_error":
			return {
				code: reason,
				message: UNKNOWN_ERROR_MESSAGE,
				// Treat unknown errors as non-retryable.
				isRetryable: false,
			}
		default:
			console.warn(`Unexpected custom block init error: ${reason}`)
			return {
				code: reason,
				message: UNKNOWN_ERROR_MESSAGE,
				// Treat unknown error codes as non-retryable.
				isRetryable: false,
			}
	}
}