'use client';

import { useState, useEffect, useMemo } from 'react';
import { useInventoryStore } from '@/store/useInventoryStore';
import styles from '../styles/Home.module.css';
import { isNamedDLC } from '@/lib/utils';
import {
	fetchCharacters,
	fetchItems,
	fetchOfferings,
	fetchCustomizations,
	fetchDLCs,
	fetchAddons,
	fetchPerks
} from '@/lib/db';

export default function Home() {
	const store = useInventoryStore();

	const [charCount, setCharCount] = useState(0);
	const [custCount, setCustCount] = useState(0);
	const [itemsCount, setItemsCount] = useState(0);
	const [offeringsCount, setOfferingsCount] = useState(0);
	const [dlcsCount, setDlcsCount] = useState(0);
	const [addonsCount, setAddonsCount] = useState(0);
	const [perksCount, setPerksCount] = useState(0);

	const [importText, setImportText] = useState('');

	useEffect(() => {
		Promise.all([
			fetchCharacters(),
			fetchItems(),
			fetchOfferings(),
			fetchCustomizations(),
			fetchDLCs(),
			fetchAddons(),
			fetchPerks()
		]).then(
			([chars, items, offerings, customizations, dlcs, addons, perks]) => {
				setCharCount(chars.length);
				setItemsCount(items.length);
				setOfferingsCount(offerings.length);
				setCustCount(customizations.length);
				setDlcsCount(dlcs.filter(isNamedDLC).length);
				setAddonsCount(addons.length);
				setPerksCount(perks.length);
			}
		);
	}, []);

	/*
		profile handling
		*/
	const handleDownload = () => {
		const blob = new Blob([importText], { type: 'application/json' });
		const url = URL.createObjectURL(blob);
		const link = document.createElement('a');
		link.href = url;
		link.download = 'profile.json';
		link.click();
		URL.revokeObjectURL(url);
	};

	const handleCopy = () => {
		navigator.clipboard.writeText(importText);
	};

	const getExportText = () => {
		return JSON.stringify(
			{
				profile: {
					unlockedCharacters: store.unlockedCharacters,
					unlockedCustomizations: store.unlockedCustomizations,
					unlockedDLCs: store.unlockedDLCs,
					unlockedPerks: store.unlockedPerks,
					items: store.items,
					offerings: store.offerings,
					addons: store.addons
				},
				toggles: {
					spoofItems: store.spoofItems,
					spoofPerks: store.spoofPerks,
					spoofCatalog: store.spoofCatalog,
					spoofDLCs: store.spoofDLCs
				}
			},
			null,
			2
		);
	};

	const handleImport = async () => {
		try {
			const parsed = JSON.parse(importText);
			if (parsed.profile) store.importProfile(parsed.profile);
			else store.importProfile(parsed);
			if (parsed.toggles) store.importToggles(parsed.toggles);
		} catch (e) {
			console.error('Invalid JSON', e);
		}
	};

	useEffect(() => {
		setImportText(getExportText());
	}, [
		store.unlockedCharacters,
		store.unlockedCustomizations,
		store.unlockedDLCs,
		store.unlockedPerks,
		store.items,
		store.offerings,
		store.addons,
		store.spoofItems,
		store.spoofPerks,
		store.spoofCatalog,
		store.spoofDLCs
	]);

	/*
	stats
  */
	const unlockedItems = useMemo(
		() => Object.values(store.items).filter((qty) => qty > 0).length,
		[store.items]
	);
	const unlockedOfferings = useMemo(
		() => Object.values(store.offerings).filter((qty) => qty > 0).length,
		[store.offerings]
	);
	const unlockedAddons = useMemo(
		() => Object.values(store.addons).filter((qty) => qty > 0).length,
		[store.addons]
	);
	const unlockedPerks = store.unlockedPerks.length;

	return (
		<div className={styles.container}>
			<header className={styles.header}>
				<h1 className={styles.title}>Dashboard</h1>
				<p className={styles.subtitle}>
					Status overview and profile management
				</p>
			</header>

			{/* stats cards */}
			<section className={styles.statsGrid}>
				<div className={styles.statCard}>
					<div className={styles.statLabel}>Characters</div>
					<div className={styles.statValue}>
						{store.unlockedCharacters.length}{' '}
						<span className={styles.statTotal}>/ {charCount || '-'}</span>
					</div>
				</div>
				<div className={styles.statCard}>
					<div className={styles.statLabel}>Customizations</div>
					<div className={styles.statValue}>
						{store.unlockedCustomizations.length}{' '}
						<span className={styles.statTotal}>/ {custCount || '-'}</span>
					</div>
				</div>
				<div className={styles.statCard}>
					<div className={styles.statLabel}>DLCs</div>
					<div className={styles.statValue}>
						{store.unlockedDLCs.length}{' '}
						<span className={styles.statTotal}>/ {dlcsCount || '-'}</span>
					</div>
				</div>
				<div className={styles.statCard}>
					<div className={styles.statLabel}>Items</div>
					<div className={styles.statValue}>
						{unlockedItems}{' '}
						<span className={styles.statTotal}>/ {itemsCount || '-'}</span>
					</div>
				</div>
				<div className={styles.statCard}>
					<div className={styles.statLabel}>Offerings</div>
					<div className={styles.statValue}>
						{unlockedOfferings}{' '}
						<span className={styles.statTotal}>/ {offeringsCount || '-'}</span>
					</div>
				</div>
				<div className={styles.statCard}>
					<div className={styles.statLabel}>Addons</div>
					<div className={styles.statValue}>
						{unlockedAddons}{' '}
						<span className={styles.statTotal}>/ {addonsCount || '-'}</span>
					</div>
				</div>
				<div className={styles.statCard}>
					<div className={styles.statLabel}>Perks</div>
					<div className={styles.statValue}>
						{unlockedPerks}{' '}
						<span className={styles.statTotal}>/ {perksCount || '-'}</span>
					</div>
				</div>
			</section>

			{/* toggles */}
			<section className={styles.panelGrid}>
				<div className={styles.card}>
					<h3 className={styles.cardTitle}>Spoofer Toggles</h3>

					<div className={styles.toggleRow}>
						<div className={styles.toggleInfo}>
							<span className={styles.toggleLabel}>Item Spoofing</span>
							<span className={styles.toggleDesc}>
								Spoof inventory items, addons, and offerings
							</span>
						</div>
						<label className={styles.switch}>
							<input
								type='checkbox'
								checked={store.spoofItems}
								onChange={(e) =>
									store.setToggle('spoofItems', e.target.checked)
								}
							/>
							<span className={styles.slider}></span>
						</label>
					</div>

					<div className={styles.toggleRow}>
						<div className={styles.toggleInfo}>
							<span className={styles.toggleLabel}>Perk Spoofing</span>
							<span className={styles.toggleDesc}>
								Unlock all perk slots and custom builds
							</span>
						</div>
						<label className={styles.switch}>
							<input
								type='checkbox'
								checked={store.spoofPerks}
								onChange={(e) =>
									store.setToggle('spoofPerks', e.target.checked)
								}
							/>
							<span className={styles.slider}></span>
						</label>
					</div>

					<div className={styles.toggleRow}>
						<div className={styles.toggleInfo}>
							<span className={styles.toggleLabel}>Catalog Spoofing</span>
							<span className={styles.toggleDesc}>
								Unlock cosmetics, characters, and outfits
							</span>
						</div>
						<label className={styles.switch}>
							<input
								type='checkbox'
								checked={store.spoofCatalog}
								onChange={(e) =>
									store.setToggle('spoofCatalog', e.target.checked)
								}
							/>
							<span className={styles.slider}></span>
						</label>
					</div>

					<div className={styles.toggleRow}>
						<div className={styles.toggleInfo}>
							<span className={styles.toggleLabel}>DLC Spoofing</span>
							<span className={styles.toggleDesc}>
								Bypass Steam, Epic, and Xbox DLC ownership
							</span>
						</div>
						<label className={styles.switch}>
							<input
								type='checkbox'
								checked={store.spoofDLCs}
								onChange={(e) => store.setToggle('spoofDLCs', e.target.checked)}
							/>
							<span className={styles.slider}></span>
						</label>
					</div>
				</div>

				{/* profile */}
				<div className={styles.card}>
					<h3 className={styles.cardTitle}>Profile Import / Export</h3>

					<textarea
						className={styles.textarea}
						value={importText}
						onChange={(e) => setImportText(e.target.value)}
					/>

					<div className={styles.btnRow}>
						<button className={styles.primaryBtn} onClick={handleImport}>
							Validate & Import
						</button>
						<button className={styles.secondaryBtn} onClick={handleCopy}>
							Copy to Clipboard
						</button>
						<button className={styles.secondaryBtn} onClick={handleDownload}>
							Download file
						</button>
					</div>
				</div>
			</section>
		</div>
	);
}