import type { PlotInstruction, WorkspaceFile } from 'numbl';

// Message protocol between the app and the numbl web worker — a minimal
// version of numbl's own numbl-worker protocol (which is not published on
// npm): one "run" request in, streamed output/drawnow messages out, ending
// with "done" or "error".

/** A raw file placed into the run's virtual file system. */
export interface VfsFile {
	/** Project-relative path ('scripts/demo.m' → /project) or an absolute
	 *  VFS path such as '/system/mip/...'. */
	path: string;
	content: Uint8Array;
}

export interface RunRequest {
	type: 'run';
	/** Source of the file being run (possibly unsaved editor contents). */
	code: string;
	/** Project-relative path of the file being run. */
	mainFileName: string;
	/** Every project + system file, as bytes, for the virtual file system. */
	vfsFiles: VfsFile[];
	/** Every other project + system .m file, as text, callable as functions. */
	workspaceFiles: WorkspaceFile[];
	/** Extra search paths (e.g. the mip core package directory). */
	searchPaths?: string[];
}

export interface VfsChanges {
	created: { path: string; content: Uint8Array }[];
	modified: { path: string; content: Uint8Array }[];
	deleted: string[];
}

export type WorkerResponse =
	| { type: 'output'; text: string }
	| { type: 'drawnow'; plotInstructions: PlotInstruction[] }
	| { type: 'done'; plotInstructions: PlotInstruction[]; vfsChanges?: VfsChanges }
	| { type: 'error'; message: string; vfsChanges?: VfsChanges };