import type { BunFile } from "bun";

export namespace LatteBun {
	export interface Template {
		fill(fillins: LatteBun.templateDescriptor): LatteBun.DataStream;
		bake(fillins: LatteBun.bakeableTemplateDescriptor): LatteBun.Template;
	}

	export type DataChunk = Uint8Array<ArrayBuffer>;
	export type DataStream = ReadableStream<DataChunk>;
	export type DataStreamReader = ReadableStreamDefaultReader<DataChunk>;

	export type templatePickableOnly = string | DataChunk | BunFile;
	export type templateBakeableOnly = DataStream;

	/** A datatype that can be filled in live while a site is operating */
	export type templateFillable = templatePickableOnly;
	/** A datatype that can be baked-in to cache a page while a site is operating */
	export type templateBakeable = templateBakeableOnly | templatePickableOnly;

	/**
	 * Used to describe the fill-ins of the template
	 *
	 * {@inheritdoc template}
	 */
	export type templateDescriptor = { [_: string]: templateFillable | templateDescriptor };

	/**
	 * Used to describe the fill-ins of the template to be baked
	 *
	 * {@inheritdoc bakedTemplate}
	 */
	export type bakeableTemplateDescriptor = { [_: string]: templateBakeable | bakeableTemplateDescriptor };

	/**
	 *
	 */
	export type templateOptions = {
		create(): DataStream | Promise<DataStream>;
	};

	/**
	 *
	 */
	export type markdownOptions = {};
}