import { useState, useCallback } from 'react';
import { useRatingStore } from '../store/ratingStore';
import { useAnalytics } from '~/features/analytics';

// Milestones when to show the rating prompt
const RATING_MILESTONES = [5, 15, 50];

// Minimum days between prompts
const MIN_DAYS_BETWEEN_PROMPTS = 30;

/**
 * Calculate days between two dates
 */
function daysBetween(date1: Date, date2: Date): number {
	const oneDay = 24 * 60 * 60 * 1000; // milliseconds in one day
	return Math.round(Math.abs((date1.getTime() - date2.getTime()) / oneDay));
}

/**
 * Hook to manage rating prompt eligibility and display
 */
export const useRatingPrompt = () => {
	const { track } = useAnalytics();
	const [showPromptModal, setShowPromptModal] = useState(false);

	const { memoCreatedCount, hasRatedApp, neverAskAgain, lastPromptDate, _hasHydrated } =
		useRatingStore();

	/**
	 * Check if we should show the rating prompt based on:
	 * - Memo count milestones
	 * - Previous rating status
	 * - Time since last prompt
	 */
	const checkShouldPrompt = useCallback((): boolean => {
		// Don't check if store hasn't hydrated yet
		if (!_hasHydrated) {
			return false;
		}

		// Don't show if user already rated
		if (hasRatedApp) {
			return false;
		}

		// Don't show if user selected "never ask again"
		if (neverAskAgain) {
			return false;
		}

		// Check if we hit a milestone
		const hitMilestone = RATING_MILESTONES.includes(memoCreatedCount);
		if (!hitMilestone) {
			return false;
		}

		// Check if enough time has passed since last prompt
		if (lastPromptDate) {
			const daysSinceLastPrompt = daysBetween(new Date(lastPromptDate), new Date());
			if (daysSinceLastPrompt < MIN_DAYS_BETWEEN_PROMPTS) {
				return false;
			}
		}

		return true;
	}, [memoCreatedCount, hasRatedApp, neverAskAgain, lastPromptDate, _hasHydrated]);

	/**
	 * Trigger the rating prompt check
	 * Call this after significant positive actions (e.g., memo creation)
	 */
	const triggerPromptCheck = useCallback(() => {
		const shouldShow = checkShouldPrompt();

		if (shouldShow) {
			setShowPromptModal(true);
			track('rating_prompt_shown', {
				memo_count: memoCreatedCount,
				milestone: RATING_MILESTONES.find((m) => m === memoCreatedCount),
			});
		}
	}, [checkShouldPrompt, memoCreatedCount, track]);

	/**
	 * Close the rating prompt modal
	 */
	const closePrompt = useCallback(() => {
		setShowPromptModal(false);
	}, []);

	return {
		showPromptModal,
		triggerPromptCheck,
		closePrompt,
		isEligible: checkShouldPrompt(),
		currentMemoCount: memoCreatedCount,
	};
};