import type { InfraAsCodeIntent } from "./intents.js";
import type { ViewSchema } from "./views.js";

export const APPS_PROVISIONING_SCHEMA = "notion:apps-provisioning:v1";

/** Provisioning intents recorded while evaluating the build-only metadata bundle. */
export type RecordedProvisioning = {
	intents: InfraAsCodeIntent[];
};

/** Teamspaces are always created in the Apps workspace, so Apps supplies their parent. */
export type ProvisioningIntent =
	| Omit<Extract<InfraAsCodeIntent, { type: "teamspace" }>, "parent">
	| Exclude<InfraAsCodeIntent, { type: "teamspace" }>;

export type ProvisioningArtifact = {
	$schema: typeof APPS_PROVISIONING_SCHEMA;
	version: 1;
	intents: readonly ProvisioningIntent[];
};

/** Convert recorded declarations into the server-facing provisioning artifact. */
export function createProvisioningArtifact(
	intents: readonly InfraAsCodeIntent[],
): ProvisioningArtifact {
	const provisioningIntents: ProvisioningIntent[] = [];
	for (const intent of intents) {
		if (intent.type === "view") {
			validateCustomView(intent.view);
		} else if (intent.type === "database") {
			for (const view of intent.views ?? []) {
				validateCustomView(view);
			}
		}
		if (intent.type === "teamspace") {
			const { parent: _parent, ...teamspace } = intent;
			provisioningIntents.push(teamspace);
		} else {
			provisioningIntents.push(intent);
		}
	}

	return {
		$schema: APPS_PROVISIONING_SCHEMA,
		version: 1,
		intents: provisioningIntents,
	};
}

/** Check that a metadata bundle exported the recorder output. */
export function isRecordedProvisioning(value: unknown): value is RecordedProvisioning {
	return (
		typeof value === "object" &&
		value !== null &&
		"intents" in value &&
		Array.isArray(value.intents)
	);
}

function validateCustomView(view: ViewSchema): void {
	if (view.type === "custom") {
		if (typeof view.customBlockKey !== "string" || view.customBlockKey.trim() === "") {
			throw new Error("Custom views require a non-empty customBlockKey");
		}
		for (const field of [
			"sorts",
			"filters",
			"properties",
			"showPageIcon",
			"defaultTemplate",
		] as const) {
			if (field in view) {
				throw new Error(`Custom views do not support ${field}`);
			}
		}
	}
}