import { matchError } from "better-result";
import {
	AmbiguousPathError,
	EmptyPathQueryError,
	FinderOperationError,
	GrepCursorMismatchError,
	InvalidGrepCursorError,
	MissingPathError,
	RuntimeInitializationError,
	type GrepSearchError,
	type PathResolutionError,
} from "./errors.ts";
import { formatCandidateLines } from "./fff-format.ts";

export function formatPathResolutionError(action: string, query: string, error: PathResolutionError): string {
	return matchError(error, {
		AmbiguousPathError: (resolution) => [
			`Could not resolve \"${query}\" uniquely for ${action}.`,
			"Top matches:",
			...formatCandidateLines(resolution.candidates),
		].join("\n"),
		EmptyPathQueryError: (resolution) => resolution.message,
		MissingPathError: (resolution) => resolution.reason,
		RuntimeInitializationError: (resolution) => resolution.message,
		FinderOperationError: (resolution) => resolution.message,
	});
}

export function formatGrepError(error: GrepSearchError, pathQuery?: string): string {
	return matchError(error, {
		AmbiguousPathError: (pathError) => formatPathResolutionError("grep scope", pathQuery ?? "", pathError),
		EmptyPathQueryError: (pathError) => formatPathResolutionError("grep scope", pathQuery ?? "", pathError),
		MissingPathError: (pathError) => formatPathResolutionError("grep scope", pathQuery ?? "", pathError),
		RuntimeInitializationError: (runtimeError) => runtimeError.message,
		FinderOperationError: (finderError) => finderError.message,
		InvalidGrepCursorError: (cursorError) => cursorError.message,
		GrepCursorMismatchError: (cursorError) => cursorError.message,
	});
}