/**
 * Type declarations for the Vite plugin. The runtime lives in `vite.js` —
 * see that file for behavior, options, and the reasoning for splitting `.js`
 * + `.d.ts` instead of using a single `.ts` source.
 */

type UserConfig = { base?: string }

type ResolvedConfig = { root: string; command: "serve" | "build" }

type ServerLike = {
	middlewares: { use: (handler: MiddlewareHandler) => unknown }
}

type MiddlewareHandler = (
	req: { url?: string },
	res: {
		statusCode?: number
		setHeader: (name: string, value: string) => void
		end: (body?: string) => void
	},
	next: () => void,
) => void

type AssetEmitterContext = {
	emitFile: (file: {
		type: "asset"
		fileName: string
		source: string
	}) => string
}

export type NotionCustomBlockPlugin = {
	name: string
	config: (userConfig: UserConfig) => { base: string }
	configResolved: (config: ResolvedConfig) => void
	configureServer: (server: ServerLike) => void
	configurePreviewServer: (server: ServerLike) => void
	buildStart: (this: AssetEmitterContext) => void
}

/**
 * Vite plugin that serves the project's `custom_blocks.json` to the custom-block
 * bundle in dev and emits it as a separate asset on build.
 */
export function notionCustomBlock(): NotionCustomBlockPlugin