import Link from "next/link";
import { ArrowRight, Download, Play, ShieldAlert } from "lucide-react";
import { signIn } from "@/auth";
import { getPortalSession } from "@/lib/get-session";
import { loadTenantForShell } from "@/lib/portal-data";
import { Panel } from "@/components/portal/Panel";
import { Monogram } from "@/components/portal/Monogram";
import { Sev } from "@/components/portal/Sev";
import { Sparkbars } from "@/components/portal/charts/Sparkbars";
import { Sparkline } from "@/components/portal/charts/Sparkline";
import { Ring } from "@/components/portal/charts/Ring";
import { StackBar } from "@/components/portal/charts/StackBar";
import { Heatmap, HeatLegend } from "@/components/portal/charts/Heatmap";
import { productById, type Severity } from "@/lib/fixtures";

const SEV_LABEL: Record<Severity, string> = {
  critical: "Critical",
  high: "High",
  medium: "Medium",
  low: "Low",
};

export default async function Dashboard({
  params,
}: {
  params: Promise<{ slug: string }>;
}) {
  const { slug } = await params;
  const session = await getPortalSession();
  const tenant = await loadTenantForShell(slug);
  if (!tenant) return null;

  if (!session) {
    async function login() {
      "use server";
      await signIn("keycloak", { redirectTo: `/${slug}/dashboard` });
    }
    return (
      <div className="content-inner">
        <div className="page-head">
          <div>
            <div className="page-title">Sign in to {tenant.name}</div>
            <div className="page-sub">
              Authenticate via Keycloak to view the {tenant.short} control plane.
            </div>
          </div>
        </div>
        <Panel bracket>
          <form action={login}>
            <button type="submit" className="btn btn-primary">
              Sign in with Keycloak
            </button>
          </form>
        </Panel>
      </div>
    );
  }

  const m = tenant.metrics;
  const userOnly =
    (session.org_roles ?? []).every((r) => r === "USER") || session.org_roles?.length === 0;
  const f30 = tenant.series.findings30;
  const lastWindow = f30.slice(-14);
  const findingsDelta = m.findingsDelta;
  const ctrlPct = Math.round((m.controlsPassing / m.controlsTotal) * 100);
  const sparkEvidence = tenant.series.evidence30;

  return (
    <div className="content-inner">
      <div className="page-head">
        <div>
          <div className="page-title">
            {userOnly ? "Workspace" : "Overview"}
          </div>
          <div className="page-sub">
            {tenant.name} ·{" "}
            <span className="mono">
              {new Date().toISOString().slice(0, 10)}
            </span>
          </div>
        </div>
        <div className="ph-actions">
          <button type="button" className="btn">
            <Download size={14} /> Export
          </button>
          <WriteGuarded status={tenant.status}>
            <button type="button" className="btn btn-primary">
              <Play size={14} /> Run scan
            </button>
          </WriteGuarded>
        </div>
      </div>

      {!userOnly ? (
        <div className="kpi-rail bracket">
          <div className="kpi">
            <div className="row" style={{ gap: 6 }}>
              <span className="label-micro">Open findings</span>
            </div>
            <div className="kpi-top">
              <span className="kpi-val">{m.openFindings}</span>
              <span
                className={`kpi-delta ${findingsDelta > 0 ? "delta-up" : "delta-down"}`}
              >
                {findingsDelta > 0 ? "+" : ""}
                {findingsDelta} · 7d
              </span>
            </div>
            <div className="kpi-viz">
              <Sparkbars data={lastWindow} width={132} height={26} />
            </div>
          </div>

          <div className="kpi">
            <span className="label-micro">Critical open</span>
            <div className="kpi-top">
              <span className="kpi-val" style={{ color: "var(--sev-critical)" }}>
                {m.critical}
              </span>
              <span className="kpi-delta muted">of {m.openFindings}</span>
            </div>
            <div className="kpi-viz" style={{ marginTop: 7 }}>
              <StackBar counts={m.severity} />
            </div>
          </div>

          <div className="kpi">
            <span className="label-micro">Controls passing</span>
            <div className="kpi-ring">
              <Ring value={m.controlsPassing} total={m.controlsTotal} size={48} stroke={5} />
              <div className="col" style={{ gap: 2 }}>
                <span
                  className="kpi-val"
                  style={{ fontSize: 22 }}
                >
                  {ctrlPct}
                  <span style={{ fontSize: 12, color: "var(--ink-3)" }}>%</span>
                </span>
                <span className="mono" style={{ fontSize: 10, color: "var(--ink-3)" }}>
                  {m.controlsPassing} / {m.controlsTotal}
                </span>
              </div>
            </div>
          </div>

          <div className="kpi">
            <span className="label-micro">Evidence</span>
            <div className="kpi-top">
              <span className="kpi-val">{m.evidence}</span>
              <span className="kpi-delta delta-down">+{m.resolved7} · 7d</span>
            </div>
            <div className="kpi-viz">
              <Sparkline
                data={sparkEvidence}
                width={132}
                height={26}
                stroke="var(--ok)"
                fill="color-mix(in oklch, var(--ok) 16%, transparent)"
              />
            </div>
          </div>

          <div className="kpi">
            <span className="label-micro">Last scan</span>
            <div className="kpi-top">
              <span className="kpi-val" style={{ fontSize: 20 }}>
                {m.lastScan}
              </span>
            </div>
            <div className="kpi-viz">
              <Sparkbars
                data={tenant.series.controls30.slice(-14)}
                width={132}
                height={26}
                color="var(--ink-3)"
              />
            </div>
          </div>
        </div>
      ) : null}

      <div className="grid g-12" style={{ marginTop: 14 }}>
        {!userOnly ? (
          <div className="span-8 col" style={{ gap: 12 }}>
            <Panel
              title="Findings · 30-day flow"
              tail={
                <span className="mono muted" style={{ fontSize: 10.5 }}>
                  {f30.length}d window
                </span>
              }
              pad={false}
              bracket
            >
              <div style={{ padding: 14 }}>
                <Sparkline data={f30} width={680} height={90} />
              </div>
              <div className="divider" />
              <div style={{ padding: 14 }}>
                <StackBar counts={m.severity} height={9} />
                <div className="sevlegend">
                  {(["critical", "high", "medium", "low"] as Severity[]).map((k) => (
                    <span key={k} className="sl">
                      <span className="sw" style={{ background: `var(--sev-${k})` }} />
                      {SEV_LABEL[k]}
                      <span className="slc">{m.severity[k]}</span>
                    </span>
                  ))}
                </div>
              </div>
            </Panel>

            <Panel
              title="Top open findings"
              tail={
                <Link
                  href={`/${slug}/products`}
                  className="row mono"
                  style={{ fontSize: 11, color: "var(--ink-3)" }}
                >
                  View all <ArrowRight size={12} />
                </Link>
              }
              pad={false}
            >
              <table className="ltable">
                <thead>
                  <tr>
                    <th>Sev</th>
                    <th>ID</th>
                    <th>Title</th>
                    <th>Control</th>
                    <th className="r">Age</th>
                  </tr>
                </thead>
                <tbody>
                  {tenant.findings
                    .filter((f) => f.status === "open")
                    .slice(0, 5)
                    .map((f) => (
                      <tr key={f.id} className="clickable">
                        <td>
                          <Sev level={f.severity} />
                        </td>
                        <td className="t-id">{f.id}</td>
                        <td
                          style={{
                            maxWidth: 380,
                            overflow: "hidden",
                            textOverflow: "ellipsis",
                            whiteSpace: "nowrap",
                          }}
                        >
                          {f.title}
                        </td>
                        <td className="mono t-dim">{f.control}</td>
                        <td className="r mono">{f.ageDays}d</td>
                      </tr>
                    ))}
                </tbody>
              </table>
            </Panel>
          </div>
        ) : null}

        <div className={userOnly ? "span-12 col" : "span-4 col"} style={{ gap: 12 }}>
          <Panel title="Product posture" pad={false}>
            {tenant.products
              .filter(
                (p) => tenant.entitled.includes(p.id) || tenant.trialing.includes(p.id),
              )
              .map((p) => {
                const arr = tenant.series.prodSeries[p.id] ?? [];
                const open = tenant.findings.filter(
                  (f) => f.product === p.id && f.status === "open",
                ).length;
                return (
                  <Link
                    key={p.id}
                    href={`/${slug}/products?p=${encodeURIComponent(p.slug)}`}
                    className="posture"
                  >
                    <Monogram text={p.mono} size={28} />
                    <div className="col" style={{ minWidth: 0, flex: 1 }}>
                      <span className="pname">{p.name}</span>
                      <span className="pslug">{p.slug}</span>
                    </div>
                    <div className="pspark">
                      <Sparkline data={arr} width={120} height={28} />
                    </div>
                    <div className="col" style={{ minWidth: 38 }}>
                      <span className="pnum">{open}</span>
                      <span className="pnl">open</span>
                    </div>
                  </Link>
                );
              })}
          </Panel>

          <Panel
            title="Scan & activity"
            tail={
              <span className="muted mono" style={{ fontSize: 10 }}>
                5 weeks
              </span>
            }
          >
            <div style={{ display: "flex", justifyContent: "center" }}>
              <Heatmap data={tenant.series.heatmap} cell={20} />
            </div>
            <div
              style={{
                marginTop: 10,
                display: "flex",
                justifyContent: "center",
              }}
            >
              <HeatLegend />
            </div>
          </Panel>

          <Panel title="Recent activity" pad={false}>
            <div className="feed">
              {tenant.activity.slice(0, 5).map((a, i) => {
                const prod = productById(a.product);
                return (
                  <div key={i} className="feed-row">
                    <span className="feed-time">{a.when}</span>
                    <div className="feed-body">
                      <span className="fa">{a.actor}</span>{" "}
                      <span className="ft">{a.verb}</span>{" "}
                      <span className="mono ft">{a.target}</span>
                    </div>
                    <span className="feed-prod">
                      {prod?.mono ?? a.product.slice(0, 2).toUpperCase()}
                    </span>
                  </div>
                );
              })}
            </div>
          </Panel>
        </div>
      </div>
    </div>
  );
}

// Wraps any write CTA in the frozen-write hovercard guard. On `frozen`
// tenants the button is disabled and a tooltip explains the 402.
function WriteGuarded({
  status,
  children,
}: {
  status: string;
  children: React.ReactNode;
}) {
  if (status !== "frozen") return <>{children}</>;
  return (
    <span className="guard">
      {children}
      <span className="hovercard" role="tooltip">
        <strong style={{ display: "block", marginBottom: 4 }}>
          <ShieldAlert size={12} style={{ verticalAlign: -1, marginRight: 4 }} />
          Tenant is read-only
        </strong>
        <span className="hc-code">HTTP 402 · payment required</span>
        <br />
        <a className="hc-link" href="#">
          Re-activate to continue →
        </a>
      </span>
    </span>
  );
}