/**
 * DCP Tools Expanded Command
 *
 * Toggle or set tool output expansion for the current session.
 */

import type { CommandDefinition } from "../types";

type ToolsExpandedUI = {
	getToolsExpanded?: () => boolean;
	setToolsExpanded?: (expanded: boolean) => void;
};

function parseDesiredState(args?: string): boolean | null | undefined {
	if (!args) {
		return null;
	}

	const normalized = args.trim().toLowerCase();
	if (!normalized) {
		return null;
	}

	if (["on", "true", "1", "yes", "expand", "expanded"].includes(normalized)) {
		return true;
	}

	if (["off", "false", "0", "no", "collapse", "collapsed"].includes(normalized)) {
		return false;
	}

	return undefined;
}

export function createToolsExpandedCommand(): CommandDefinition {
	return {
		description: "Toggle tool output expansion (on/off)",
		handler: async (args, ctx) => {
			const ui = ctx.ui as ToolsExpandedUI;
			if (!ui.getToolsExpanded || !ui.setToolsExpanded) {
				ctx.ui.notify("Tool output expansion controls are not available in this pi version.", "warning");
				return;
			}

			const desired = parseDesiredState(args);
			if (desired === undefined) {
				ctx.ui.notify("Usage: /dcp-tools [on|off]", "warning");
				return;
			}

			const current = ui.getToolsExpanded();
			const next = desired === null ? !current : desired;

			ui.setToolsExpanded(next);
			ctx.ui.notify(`Tool outputs: ${next ? "expanded" : "collapsed"}`, "info");
		},
	};
}