/**
 * <folk-graph-viewer> — community relationship graph.
 *
 * Displays network nodes (people, companies, opportunities)
 * and edges in a force-directed layout with search and filtering.
 */

class FolkGraphViewer extends HTMLElement {
	private shadow: ShadowRoot;
	private space = "";
	private workspaces: any[] = [];
	private info: any = null;
	private filter: "all" | "person" | "company" | "opportunity" = "all";
	private searchQuery = "";
	private error = "";

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

	connectedCallback() {
		this.space = this.getAttribute("space") || "demo";
		this.loadData();
		this.render();
	}

	private getApiBase(): string {
		const path = window.location.pathname;
		const match = path.match(/^\/([^/]+)\/network/);
		return match ? `/${match[1]}/network` : "";
	}

	private async loadData() {
		const base = this.getApiBase();
		try {
			const [wsRes, infoRes] = await Promise.all([
				fetch(`${base}/api/workspaces`),
				fetch(`${base}/api/info`),
			]);
			if (wsRes.ok) this.workspaces = await wsRes.json();
			if (infoRes.ok) this.info = await infoRes.json();
		} catch { /* offline */ }
		this.render();
	}

	private render() {
		this.shadow.innerHTML = `
		<style>
			:host { display: block; font-family: system-ui, -apple-system, sans-serif; color: #e0e0e0; }
			* { box-sizing: border-box; }

			.header { display: flex; gap: 8px; margin-bottom: 16px; align-items: center; }
			.header-title { font-size: 18px; font-weight: 600; flex: 1; }

			.toolbar { display: flex; gap: 8px; margin-bottom: 16px; align-items: center; flex-wrap: wrap; }
			.search-input {
				border: 1px solid #333; border-radius: 8px; padding: 8px 12px;
				background: #16161e; color: #e0e0e0; font-size: 13px; width: 200px; outline: none;
			}
			.search-input:focus { border-color: #6366f1; }
			.filter-btn {
				padding: 6px 12px; border-radius: 8px; border: 1px solid #333;
				background: #16161e; color: #888; cursor: pointer; font-size: 12px;
			}
			.filter-btn:hover { border-color: #555; }
			.filter-btn.active { border-color: #6366f1; color: #6366f1; }

			.graph-canvas {
				width: 100%; height: 500px; border-radius: 12px;
				background: #0d0d14; border: 1px solid #222;
				display: flex; align-items: center; justify-content: center;
				position: relative; overflow: hidden;
			}
			.placeholder { text-align: center; color: #555; padding: 40px; }
			.placeholder p { margin: 6px 0; }

			.workspace-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 12px; margin-top: 16px; }
			.ws-card {
				background: #1e1e2e; border: 1px solid #333; border-radius: 10px;
				padding: 16px; cursor: pointer; transition: border-color 0.2s;
			}
			.ws-card:hover { border-color: #555; }
			.ws-name { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
			.ws-meta { font-size: 12px; color: #888; }

			.legend { display: flex; gap: 16px; margin-top: 12px; }
			.legend-item { display: flex; align-items: center; gap: 6px; font-size: 12px; color: #888; }
			.legend-dot { width: 10px; height: 10px; border-radius: 50%; }
			.dot-person { background: #3b82f6; }
			.dot-company { background: #22c55e; }
			.dot-opportunity { background: #f59e0b; }

			.stats { display: flex; gap: 20px; margin-bottom: 16px; }
			.stat { text-align: center; }
			.stat-value { font-size: 24px; font-weight: 700; color: #6366f1; }
			.stat-label { font-size: 11px; color: #888; }
		</style>

		${this.error ? `<div style="color:#ef5350;text-align:center;padding:8px">${this.esc(this.error)}</div>` : ""}

		<div class="header">
			<span class="header-title">\u{1F310} Network Graph</span>
		</div>

		<div class="toolbar">
			<input class="search-input" type="text" placeholder="Search nodes..." id="search-input" value="${this.esc(this.searchQuery)}">
			${(["all", "person", "company", "opportunity"] as const).map(f =>
				`<button class="filter-btn ${this.filter === f ? "active" : ""}" data-filter="${f}">${f === "all" ? "All" : f.charAt(0).toUpperCase() + f.slice(1)}s</button>`
			).join("")}
		</div>

		<div class="graph-canvas">
			<div class="placeholder">
				<p style="font-size:48px">\u{1F578}\u{FE0F}</p>
				<p style="font-size:16px">Community Relationship Graph</p>
				<p>Connect the force-directed layout engine to visualize your network.</p>
				<p style="font-size:12px;color:#444">Automerge CRDT sync + d3-force layout</p>
			</div>
		</div>

		<div class="legend">
			<div class="legend-item"><span class="legend-dot dot-person"></span> People</div>
			<div class="legend-item"><span class="legend-dot dot-company"></span> Companies</div>
			<div class="legend-item"><span class="legend-dot dot-opportunity"></span> Opportunities</div>
		</div>

		${this.workspaces.length > 0 ? `
			<div style="margin-top:20px;font-size:14px;font-weight:600;color:#aaa">Workspaces</div>
			<div class="workspace-list">
				${this.workspaces.map(ws => `
					<div class="ws-card">
						<div class="ws-name">${this.esc(ws.name || ws.slug)}</div>
						<div class="ws-meta">${ws.nodeCount || 0} nodes \u00B7 ${ws.edgeCount || 0} edges</div>
					</div>
				`).join("")}
			</div>
		` : ""}
		`;
		this.attachListeners();
	}

	private attachListeners() {
		this.shadow.querySelectorAll("[data-filter]").forEach(el => {
			el.addEventListener("click", () => {
				this.filter = (el as HTMLElement).dataset.filter as any;
				this.render();
			});
		});
		this.shadow.getElementById("search-input")?.addEventListener("input", (e) => {
			this.searchQuery = (e.target as HTMLInputElement).value;
		});
	}

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

customElements.define("folk-graph-viewer", FolkGraphViewer);