"use client";

import { useMemo } from "react";
import { useKeybindingsStore } from "@/stores/keybindings-store";
import { ActionWithOptionalArgs } from "@/constants/actions";

export interface KeybindingConflictInfo {
	key: string;
	actions: ActionWithOptionalArgs[];
	isConflict: boolean;
}

export const useKeybindingConflicts = () => {
	const { keybindings } = useKeybindingsStore();

	const conflicts = useMemo(() => {
		const keyToActions: Record<string, ActionWithOptionalArgs[]> = {};
		const conflictList: KeybindingConflictInfo[] = [];

		// Group actions by key
		Object.entries(keybindings).forEach(([key, action]) => {
			if (!keyToActions[key]) {
				keyToActions[key] = [];
			}
			keyToActions[key].push(action);
		});

		// Find conflicts
		Object.entries(keyToActions).forEach(([key, actions]) => {
			const uniqueActions = [...new Set(actions)];
			conflictList.push({
				key,
				actions: uniqueActions,
				isConflict: uniqueActions.length > 1,
			});
		});

		return conflictList.filter((item) => item.isConflict);
	}, [keybindings]);

	const hasConflicts = conflicts.length > 0;

	const getConflictsForKey = (key: string): KeybindingConflictInfo | null => {
		return conflicts.find((conflict) => conflict.key === key) || null;
	};

	const getConflictsForAction = (
		action: ActionWithOptionalArgs,
	): KeybindingConflictInfo[] => {
		return conflicts.filter((conflict) => conflict.actions.includes(action));
	};

	return {
		conflicts,
		hasConflicts,
		getConflictsForKey,
		getConflictsForAction,
	};
};