/**
 * <folk-schedule-cancel> — guest self-cancel page.
 *
 * Reads booking via `/api/bookings/:id?token=...`, lets guest confirm cancel
 * with optional reason. Phase F adds reschedule suggestions email.
 */

class FolkScheduleCancel extends HTMLElement {
	private shadow: ShadowRoot;
	private space = "";
	private bookingId = "";
	private token = "";
	private booking: any = null;
	private err = "";
	private done = false;

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

	connectedCallback() {
		this.space = this.getAttribute("space") || "demo";
		this.bookingId = this.getAttribute("booking-id") || "";
		const qs = new URLSearchParams(window.location.search);
		this.token = qs.get("token") || "";
		void this.load();
	}

	private apiBase(): string {
		const path = window.location.pathname;
		const match = path.match(/^(\/[^/]+)?\/rschedule/);
		return `${match?.[0] || "/rschedule"}/api`;
	}

	private async load() {
		if (!this.token) {
			this.err = "Missing cancel token in link.";
			this.render();
			return;
		}
		try {
			const res = await fetch(`${this.apiBase()}/bookings/${this.bookingId}?token=${encodeURIComponent(this.token)}`);
			if (!res.ok) throw new Error((await res.json().catch(() => ({})))?.error || "Failed to load");
			this.booking = await res.json();
		} catch (e: any) {
			this.err = e?.message || String(e);
		}
		this.render();
	}

	private async cancel(reason: string) {
		try {
			const res = await fetch(`${this.apiBase()}/bookings/${this.bookingId}/cancel`, {
				method: "POST",
				headers: { "Content-Type": "application/json" },
				body: JSON.stringify({ token: this.token, reason }),
			});
			if (!res.ok) throw new Error((await res.json().catch(() => ({})))?.error || "Cancel failed");
			this.done = true;
		} catch (e: any) {
			this.err = e?.message || String(e);
		}
		this.render();
	}

	private render() {
		const b = this.booking;
		let body = "";
		if (this.err) {
			body = `<div class="err">${escapeHtml(this.err)}</div>`;
		} else if (this.done) {
			body = `<div class="ok">Booking cancelled. A confirmation email is on the way.</div>`;
		} else if (!b) {
			body = `<div class="loading">Loading booking&hellip;</div>`;
		} else {
			const start = new Date(b.startTime).toLocaleString();
			body = `
				<h1>Cancel this booking?</h1>
				<dl>
					<dt>With</dt><dd>${escapeHtml(b.host?.label || b.host?.id || "")}</dd>
					<dt>When</dt><dd>${escapeHtml(start)}</dd>
					<dt>Guest</dt><dd>${escapeHtml(b.guestName || "")}</dd>
				</dl>
				<label>Reason (optional)<textarea id="reason" rows="3"></textarea></label>
				<button id="cancel-btn">Cancel booking</button>
				<a href="../" class="back">&larr; Back</a>
			`;
		}
		this.shadow.innerHTML = `
			<style>
				:host { display: block; color: #e2e8f0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; background: #0b1120; min-height: 100vh; }
				.wrap { max-width: 560px; margin: 0 auto; padding: 48px 24px; }
				.card { background: #111827; border: 1px solid rgba(148,163,184,0.12); border-radius: 16px; padding: 32px; }
				h1 { margin: 0 0 16px; font-size: 1.4rem; }
				dl { display: grid; grid-template-columns: 80px 1fr; gap: 8px 12px; margin: 0 0 20px; color: #cbd5e1; }
				dt { color: #94a3b8; }
				label { display: block; margin-bottom: 16px; color: #cbd5e1; font-size: 0.9rem; }
				textarea { width: 100%; margin-top: 6px; padding: 8px; border-radius: 6px; border: 1px solid rgba(148,163,184,0.2); background: #0b1120; color: #e2e8f0; font-family: inherit; }
				button { background: #ef4444; color: #fff; border: 0; padding: 10px 18px; border-radius: 8px; font-weight: 600; cursor: pointer; }
				button:hover { background: #dc2626; }
				.back { display: inline-block; margin-left: 12px; color: #94a3b8; text-decoration: none; }
				.err { padding: 20px; border: 1px solid rgba(239,68,68,0.3); background: rgba(239,68,68,0.08); border-radius: 8px; color: #fca5a5; }
				.ok { padding: 20px; border: 1px solid rgba(34,197,94,0.3); background: rgba(34,197,94,0.08); border-radius: 8px; color: #86efac; }
				.loading { color: #94a3b8; }
			</style>
			<div class="wrap"><div class="card">${body}</div></div>
		`;
		this.shadow.getElementById("cancel-btn")?.addEventListener("click", () => {
			const reason = (this.shadow.getElementById("reason") as HTMLTextAreaElement)?.value || "";
			void this.cancel(reason);
		});
	}
}

function escapeHtml(s: string): string {
	return String(s)
		.replace(/&/g, "&amp;")
		.replace(/</g, "&lt;")
		.replace(/>/g, "&gt;")
		.replace(/"/g, "&quot;")
		.replace(/'/g, "&#39;");
}

customElements.define("folk-schedule-cancel", FolkScheduleCancel);