/**
 * <folk-cart-shop> — browse catalog, view orders, trigger fulfillment.
 * Shows catalog items, order creation flow, and order status tracking.
 */

import { catalogSchema, catalogDocId, type CatalogDoc, orderSchema, type OrderDoc } from "../schemas";
import type { DocumentId } from "../../../shared/local-first/document";

class FolkCartShop extends HTMLElement {
	private shadow: ShadowRoot;
	private space = "default";
	private catalog: any[] = [];
	private orders: any[] = [];
	private view: "catalog" | "orders" = "catalog";
	private loading = true;
	private _offlineUnsubs: (() => void)[] = [];

	constructor() {
		super();
		this.shadow = this.attachShadow({ mode: "open" });
	}

	connectedCallback() {
		// Resolve space from attribute or URL path
		const attr = this.getAttribute("space");
		if (attr) {
			this.space = attr;
		} else {
			const parts = window.location.pathname.split("/").filter(Boolean);
			this.space = parts.length >= 1 ? parts[0] : "default";
		}

		if (this.space === "demo") {
			this.loadDemoData();
			return;
		}

		this.render();
		this.subscribeOffline();
		this.loadData();
	}

	disconnectedCallback() {
		for (const unsub of this._offlineUnsubs) unsub();
		this._offlineUnsubs = [];
	}

	private async subscribeOffline() {
		const runtime = (window as any).__rspaceOfflineRuntime;
		if (!runtime?.isInitialized) return;

		try {
			// Subscribe to catalog (single doc per space)
			const catDocId = catalogDocId(this.space) as DocumentId;
			const catDoc = await runtime.subscribe(catDocId, catalogSchema);
			if (catDoc?.items && Object.keys(catDoc.items).length > 0 && this.catalog.length === 0) {
				this.catalog = Object.values((catDoc as CatalogDoc).items).map(item => ({
					id: item.id, title: item.title, description: '',
					product_type: item.productType, status: item.status,
					tags: item.tags || [],
					created_at: new Date(item.createdAt).toISOString(),
				}));
				this.loading = false;
				this.render();
			}
			this._offlineUnsubs.push(runtime.onChange(catDocId, (doc: CatalogDoc) => {
				if (doc?.items) {
					this.catalog = Object.values(doc.items).map(item => ({
						id: item.id, title: item.title, description: '',
						product_type: item.productType, status: item.status,
						tags: item.tags || [],
						created_at: new Date(item.createdAt).toISOString(),
					}));
					this.render();
				}
			}));

			// Subscribe to orders (multi-doc)
			const orderDocs = await runtime.subscribeModule('cart', 'orders', orderSchema);
			if (orderDocs.size > 0 && this.orders.length === 0) {
				const fromDocs: any[] = [];
				for (const [docId, doc] of orderDocs) {
					const d = doc as OrderDoc;
					if (!d?.order) continue;
					fromDocs.push({
						id: d.order.id, status: d.order.status,
						quantity: d.order.quantity, total_price: d.order.totalPrice,
						currency: d.order.currency,
						created_at: new Date(d.order.createdAt).toISOString(),
					});
				}
				if (fromDocs.length > 0) {
					this.orders = fromDocs;
					this.render();
				}
			}
		} catch { /* runtime unavailable */ }
	}

	private loadDemoData() {
		const now = Date.now();
		this.catalog = [
			{
				id: "demo-cat-1",
				title: "The Commons",
				description: "A pocket book exploring shared resources and collective stewardship.",
				price: 12,
				currency: "USD",
				tags: ["books"],
				product_type: "pocket book",
				status: "active",
				created_at: new Date(now - 30 * 86400000).toISOString(),
			},
			{
				id: "demo-cat-2",
				title: "Mycelium Networks",
				description: "Illustrated poster mapping underground fungal communication pathways.",
				price: 18,
				currency: "USD",
				tags: ["prints"],
				product_type: "poster",
				status: "active",
				created_at: new Date(now - 25 * 86400000).toISOString(),
			},
			{
				id: "demo-cat-3",
				title: "#DefectFi",
				description: "Organic cotton tee shirt with the #DefectFi campaign logo.",
				price: 25,
				currency: "USD",
				tags: ["apparel"],
				product_type: "tee shirt",
				status: "active",
				created_at: new Date(now - 20 * 86400000).toISOString(),
			},
			{
				id: "demo-cat-4",
				title: "Cosmolocal Sticker Sheet",
				description: "Die-cut sticker sheet with cosmolocal design motifs.",
				price: 5,
				currency: "USD",
				tags: ["stickers"],
				product_type: "sticker sheet",
				status: "active",
				created_at: new Date(now - 15 * 86400000).toISOString(),
			},
			{
				id: "demo-cat-5",
				title: "Doughnut Economics",
				description: "A zine breaking down Kate Raworth's doughnut economics framework.",
				price: 8,
				currency: "USD",
				tags: ["books"],
				product_type: "zine",
				status: "active",
				created_at: new Date(now - 10 * 86400000).toISOString(),
			},
			{
				id: "demo-cat-6",
				title: "rSpace Logo",
				description: "Embroidered patch featuring the rSpace logo on twill backing.",
				price: 6,
				currency: "USD",
				tags: ["accessories"],
				product_type: "embroidered patch",
				status: "active",
				created_at: new Date(now - 5 * 86400000).toISOString(),
			},
			{
				id: "demo-cat-7",
				title: "Cosmolocal Network Tee",
				description: "Bella+Canvas 3001 tee with the Cosmolocal Network radial design. DTG printed by local providers or Printful.",
				price: 25,
				currency: "USD",
				tags: ["apparel", "cosmolocal"],
				product_type: "tee",
				required_capabilities: ["dtg-print"],
				status: "active",
				created_at: new Date(now - 3 * 86400000).toISOString(),
			},
			{
				id: "demo-cat-8",
				title: "Cosmolocal Sticker Sheet",
				description: "Kiss-cut vinyl sticker sheet with cosmolocal network motifs. Weatherproof and UV-resistant.",
				price: 5,
				currency: "USD",
				tags: ["stickers", "cosmolocal"],
				product_type: "sticker-sheet",
				required_capabilities: ["vinyl-cut"],
				status: "active",
				created_at: new Date(now - 1 * 86400000).toISOString(),
			},
		];

		this.orders = [
			{
				id: "demo-ord-1001",
				items: [
					{ title: "The Commons", qty: 1, price: 12 },
					{ title: "Mycelium Networks", qty: 1, price: 18 },
				],
				total: 30,
				total_price: "30.00",
				currency: "USD",
				status: "paid",
				created_at: new Date(now - 2 * 86400000).toISOString(),
				customer_email: "reader@example.com",
				artifact_title: "Order #1001",
				quantity: 2,
			},
			{
				id: "demo-ord-1002",
				items: [
					{ title: "#DefectFi", qty: 1, price: 25 },
				],
				total: 25,
				total_price: "25.00",
				currency: "USD",
				status: "pending",
				created_at: new Date(now - 1 * 86400000).toISOString(),
				customer_email: "activist@example.com",
				artifact_title: "Order #1002",
				quantity: 1,
			},
			{
				id: "demo-ord-1003",
				items: [
					{ title: "Cosmolocal Sticker Sheet", qty: 1, price: 5 },
					{ title: "Doughnut Economics", qty: 1, price: 8 },
					{ title: "rSpace Logo", qty: 1, price: 6 },
				],
				total: 23,
				total_price: "23.00",
				currency: "USD",
				status: "shipped",
				created_at: new Date(now - 5 * 86400000).toISOString(),
				customer_email: "maker@example.com",
				artifact_title: "Order #1003",
				quantity: 3,
			},
		];

		this.loading = false;
		this.render();
	}

	private getApiBase(): string {
		const path = window.location.pathname;
		const match = path.match(/^(\/[^/]+)?\/rcart/);
		return match ? match[0] : "/rcart";
	}

	private async loadData() {
		this.loading = true;
		this.render();
		try {
			const [catRes, ordRes] = await Promise.all([
				fetch(`${this.getApiBase()}/api/catalog?limit=50`),
				fetch(`${this.getApiBase()}/api/orders?limit=20`),
			]);
			const catData = await catRes.json();
			const ordData = await ordRes.json();
			this.catalog = catData.entries || [];
			this.orders = ordData.orders || [];
		} catch (e) {
			console.error("Failed to load cart data:", e);
		}
		this.loading = false;
		this.render();
	}

	private render() {
		this.shadow.innerHTML = `
		<style>
			:host { display: block; padding: 1.5rem; }
			.rapp-nav { display: flex; gap: 8px; align-items: center; margin-bottom: 1rem; min-height: 36px; }
			.rapp-nav__title { font-size: 15px; font-weight: 600; flex: 1; color: #e2e8f0; }
			.tabs { display: flex; gap: 0.5rem; }
			.tab { padding: 0.5rem 1rem; border-radius: 8px; border: 1px solid #334155; background: #1e293b; color: #94a3b8; cursor: pointer; font-size: 0.875rem; }
			.tab:hover { border-color: #475569; color: #f1f5f9; }
			.tab.active { background: #4f46e5; border-color: #6366f1; color: #fff; }
			.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1rem; }
			.card { background: #1e293b; border: 1px solid #334155; border-radius: 12px; padding: 1.25rem; }
			.card:hover { border-color: #475569; }
			.card-title { color: #f1f5f9; font-weight: 600; font-size: 1rem; margin: 0 0 0.5rem; }
			.card-meta { color: #94a3b8; font-size: 0.8125rem; margin-bottom: 0.5rem; }
			.tag { display: inline-block; padding: 0.125rem 0.5rem; border-radius: 4px; font-size: 0.6875rem; margin-right: 0.25rem; }
			.tag-type { background: rgba(99,102,241,0.1); color: #818cf8; }
			.tag-cap { background: rgba(34,197,94,0.1); color: #4ade80; }
			.dims { color: #64748b; font-size: 0.75rem; margin-top: 0.5rem; }
			.status { padding: 0.125rem 0.5rem; border-radius: 999px; font-size: 0.6875rem; font-weight: 500; }
			.status-pending { background: rgba(251,191,36,0.15); color: #fbbf24; }
			.status-paid { background: rgba(34,197,94,0.15); color: #4ade80; }
			.status-active { background: rgba(34,197,94,0.15); color: #4ade80; }
			.status-completed { background: rgba(99,102,241,0.15); color: #a5b4fc; }
			.status-cancelled { background: rgba(239,68,68,0.15); color: #f87171; }
			.status-shipped { background: rgba(56,189,248,0.15); color: #38bdf8; }
			.price { color: #f1f5f9; font-weight: 600; font-size: 1rem; margin-top: 0.5rem; }
			.order-card { display: flex; justify-content: space-between; align-items: center; }
			.order-info { flex: 1; }
			.order-price { color: #f1f5f9; font-weight: 600; font-size: 1.125rem; }
			.empty { text-align: center; padding: 3rem; color: #64748b; font-size: 0.875rem; }
			.loading { text-align: center; padding: 3rem; color: #94a3b8; }
			@media (max-width: 480px) {
				.grid { grid-template-columns: 1fr; }
			}
		</style>

		<div class="rapp-nav">
			<span class="rapp-nav__title">Shop</span>
			<div class="tabs">
				<button class="tab ${this.view === 'catalog' ? 'active' : ''}" data-view="catalog">📦 Catalog (${this.catalog.length})</button>
				<button class="tab ${this.view === 'orders' ? 'active' : ''}" data-view="orders">📋 Orders (${this.orders.length})</button>
			</div>
		</div>

		${this.loading ? `<div class="loading">⏳ Loading...</div>` :
			this.view === "catalog" ? this.renderCatalog() : this.renderOrders()}
		`;

		this.shadow.querySelectorAll(".tab").forEach((el) => {
			el.addEventListener("click", () => {
				this.view = ((el as HTMLElement).dataset.view || "catalog") as "catalog" | "orders";
				this.render();
			});
		});
	}

	private renderCatalog(): string {
		if (this.catalog.length === 0) {
			return `<div class="empty">No items in the catalog yet. Ingest artifacts from rPubs or Swag Designer to list them here.</div>`;
		}

		return `<div class="grid">
			${this.catalog.map((entry) => `
			<div class="card">
				<h3 class="card-title">${this.esc(entry.title || "Untitled")}</h3>
				<div class="card-meta">
					${entry.product_type ? `<span class="tag tag-type">${this.esc(entry.product_type)}</span>` : ""}
					${(entry.required_capabilities || []).map((cap: string) => `<span class="tag tag-cap">${this.esc(cap)}</span>`).join("")}
					${(entry.tags || []).map((t: string) => `<span class="tag tag-cap">${this.esc(t)}</span>`).join("")}
				</div>
				${entry.description ? `<div class="card-meta">${this.esc(entry.description)}</div>` : ""}
				${entry.dimensions ? `<div class="dims">${entry.dimensions.width_mm}x${entry.dimensions.height_mm}mm</div>` : ""}
				${entry.price != null ? `<div class="price">$${parseFloat(entry.price).toFixed(2)} ${entry.currency || ""}</div>` : ""}
				<div style="margin-top:0.5rem"><span class="status status-${entry.status}">${entry.status}</span></div>
			</div>
			`).join("")}
		</div>`;
	}

	private renderOrders(): string {
		if (this.orders.length === 0) {
			return `<div class="empty">No orders yet.</div>`;
		}

		return `<div class="grid">
			${this.orders.map((order) => `
			<div class="card">
				<div class="order-card">
					<div class="order-info">
						<h3 class="card-title">${this.esc(order.artifact_title || "Order")}</h3>
						<div class="card-meta">
							${order.provider_name ? `Provider: ${this.esc(order.provider_name)}` : ""}
							${order.quantity > 1 ? ` • Qty: ${order.quantity}` : ""}
						</div>
						<span class="status status-${order.status}">${order.status}</span>
					</div>
					<div class="order-price">$${parseFloat(order.total_price || 0).toFixed(2)}</div>
				</div>
			</div>
			`).join("")}
		</div>`;
	}

	private esc(s: string): string {
		const d = document.createElement("div");
		d.textContent = s;
		return d.innerHTML;
	}
}

customElements.define("folk-cart-shop", FolkCartShop);