"use client";

import Link from "next/link";
import { usePathname } from "next/navigation";
import { clsx } from "clsx";
import { useAuth } from "@/components/AuthProvider";
import { auth } from "@/lib/api";

interface NavItem {
  href: string;
  label: string;
  icon: React.ReactNode;
  /** Restricted to owner/admin — the roles the backing API requires. */
  adminOnly?: boolean;
}

function ServerIcon() {
  return (
    <svg className="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
      <path strokeLinecap="round" strokeLinejoin="round" d="M5.25 14.25h13.5m-13.5 0a3 3 0 01-3-3m3 3a3 3 0 100 6h13.5a3 3 0 100-6m-16.5-3a3 3 0 013-3h13.5a3 3 0 013 3m-19.5 0a4.5 4.5 0 01.9-2.7L5.737 5.1a3.375 3.375 0 012.7-1.35h7.126c1.062 0 2.062.5 2.7 1.35l2.587 3.45a4.5 4.5 0 01.9 2.7m0 0a3 3 0 01-3 3m0 3h.008v.008h-.008v-.008zm0-6h.008v.008h-.008v-.008zm-3 6h.008v.008h-.008v-.008zm0-6h.008v.008h-.008v-.008z" />
    </svg>
  );
}

function KeyIcon() {
  return (
    <svg className="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
      <path strokeLinecap="round" strokeLinejoin="round" d="M15.75 5.25a3 3 0 013 3m3 0a6 6 0 01-7.029 5.912c-.563-.097-1.159.026-1.563.43L10.5 17.25H8.25v2.25H6v2.25H2.25v-2.818c0-.597.237-1.17.659-1.591l6.499-6.499c.404-.404.527-1 .43-1.563A6 6 0 1121.75 8.25z" />
    </svg>
  );
}

function SecretIcon() {
  return (
    <svg className="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
      <path strokeLinecap="round" strokeLinejoin="round" d="M16.5 10.5V6.75a4.5 4.5 0 10-9 0v3.75m-.75 11.25h10.5a2.25 2.25 0 002.25-2.25v-6.75a2.25 2.25 0 00-2.25-2.25H6.75a2.25 2.25 0 00-2.25 2.25v6.75a2.25 2.25 0 002.25 2.25z" />
    </svg>
  );
}

function WorkflowIcon() {
  return (
    <svg className="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
      <path strokeLinecap="round" strokeLinejoin="round" d="M9 3.75H6.912a2.25 2.25 0 00-2.15 1.588L2.35 13.177a2.25 2.25 0 00-.1.661V18a2.25 2.25 0 002.25 2.25h15A2.25 2.25 0 0021.75 18v-4.162c0-.224-.034-.447-.1-.661L19.24 5.338a2.25 2.25 0 00-2.15-1.588H15M2.25 13.5h3.86a2.25 2.25 0 012.012 1.244l.256.512a2.25 2.25 0 002.012 1.244h3.22a2.25 2.25 0 002.012-1.244l.256-.512a2.25 2.25 0 012.012-1.244h3.86M12 3v8.25m0 0l-3-3m3 3l3-3" />
    </svg>
  );
}

function AuditIcon() {
  return (
    <svg className="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
      <path strokeLinecap="round" strokeLinejoin="round" d="M9 12h3.75M9 15h3.75M9 18h3.75m3 .75H18a2.25 2.25 0 002.25-2.25V6.108c0-1.135-.845-2.098-1.976-2.192a48.424 48.424 0 00-1.123-.08m-5.801 0c-.065.21-.1.433-.1.664 0 .414.336.75.75.75h4.5a.75.75 0 00.75-.75 2.25 2.25 0 00-.1-.664m-5.8 0A2.251 2.251 0 0113.5 2.25H15c1.012 0 1.867.668 2.15 1.586m-5.8 0c-.376.023-.75.05-1.124.08C9.095 4.01 8.25 4.973 8.25 6.108V8.25m0 0H4.875c-.621 0-1.125.504-1.125 1.125v11.25c0 .621.504 1.125 1.125 1.125h9.75c.621 0 1.125-.504 1.125-1.125V9.375c0-.621-.504-1.125-1.125-1.125H8.25zM6.75 12h.008v.008H6.75V12zm0 3h.008v.008H6.75V15zm0 3h.008v.008H6.75V18z" />
    </svg>
  );
}

function SettingsIcon() {
  return (
    <svg className="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
      <path strokeLinecap="round" strokeLinejoin="round" d="M9.594 3.94c.09-.542.56-.94 1.11-.94h2.593c.55 0 1.02.398 1.11.94l.213 1.281c.063.374.313.686.645.87.074.04.147.083.22.127.324.196.72.257 1.075.124l1.217-.456a1.125 1.125 0 011.37.49l1.296 2.247a1.125 1.125 0 01-.26 1.431l-1.003.827c-.293.24-.438.613-.431.992a6.759 6.759 0 010 .255c-.007.378.138.75.43.99l1.005.828c.424.35.534.954.26 1.43l-1.298 2.247a1.125 1.125 0 01-1.369.491l-1.217-.456c-.355-.133-.75-.072-1.076.124a6.57 6.57 0 01-.22.128c-.331.183-.581.495-.644.869l-.213 1.28c-.09.543-.56.941-1.11.941h-2.594c-.55 0-1.02-.398-1.11-.94l-.213-1.281c-.062-.374-.312-.686-.644-.87a6.52 6.52 0 01-.22-.127c-.325-.196-.72-.257-1.076-.124l-1.217.456a1.125 1.125 0 01-1.369-.49l-1.297-2.247a1.125 1.125 0 01.26-1.431l1.004-.827c.292-.24.437-.613.43-.992a6.932 6.932 0 010-.255c.007-.378-.138-.75-.43-.99l-1.004-.828a1.125 1.125 0 01-.26-1.43l1.297-2.247a1.125 1.125 0 011.37-.491l1.216.456c.356.133.751.072 1.076-.124.072-.044.146-.087.22-.128.332-.183.582-.495.644-.869l.214-1.281z" />
      <path strokeLinecap="round" strokeLinejoin="round" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
    </svg>
  );
}

function MonitorIcon() {
  return (
    <svg className="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
      <path strokeLinecap="round" strokeLinejoin="round" d="M3 12h4l2 6 4-14 2 8h6" />
    </svg>
  );
}

function StepsIcon() {
  return (
    <svg className="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
      <path strokeLinecap="round" strokeLinejoin="round" d="M6 6.75A.75.75 0 016.75 6h10.5a.75.75 0 010 1.5H6.75A.75.75 0 016 6.75zm0 5.25a.75.75 0 01.75-.75h10.5a.75.75 0 010 1.5H6.75A.75.75 0 016 12zm0 5.25a.75.75 0 01.75-.75h10.5a.75.75 0 010 1.5H6.75A.75.75 0 016 17.25zM3 6.75a.75.75 0 11-1.5 0 .75.75 0 011.5 0zM3 12a.75.75 0 11-1.5 0 .75.75 0 011.5 0zm0 5.25a.75.75 0 11-1.5 0 .75.75 0 011.5 0z" />
    </svg>
  );
}

function OrgIcon() {
  return (
    <svg className="h-5 w-5" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={1.5}>
      <path strokeLinecap="round" strokeLinejoin="round" d="M3.75 21h16.5M4.5 3h15M5.25 3v18m13.5-18v18M9 6.75h1.5m-1.5 3h1.5m-1.5 3h1.5m3-6H15m-1.5 3H15m-1.5 3H15M9 21v-3.375c0-.621.504-1.125 1.125-1.125h3.75c.621 0 1.125.504 1.125 1.125V21" />
    </svg>
  );
}

const navItems: NavItem[] = [
  { href: "/servers", label: "Servers", icon: <ServerIcon /> },
  { href: "/monitors", label: "Monitors", icon: <MonitorIcon /> },
  { href: "/keys", label: "SSH Keys", icon: <KeyIcon /> },
  { href: "/secrets", label: "Secrets", icon: <SecretIcon /> },
  { href: "/workflows", label: "Workflows", icon: <WorkflowIcon /> },
  { href: "/steps", label: "Steps", icon: <StepsIcon /> },
  { href: "/audit", label: "Audit Log", icon: <AuditIcon /> },
  { href: "/settings/org", label: "Organization", icon: <OrgIcon />, adminOnly: true },
  { href: "/settings", label: "Settings", icon: <SettingsIcon />, adminOnly: true },
];

export function Sidebar() {
  const pathname = usePathname();
  const { user, org, isAdmin } = useAuth();

  const visibleItems = navItems.filter((item) => !item.adminOnly || isAdmin);

  // Longest match wins, so /settings/org doesn't also light up /settings.
  const activeHref = visibleItems.reduce<string | null>((best, item) => {
    const matches = pathname === item.href || pathname.startsWith(item.href + "/");
    if (!matches) return best;
    return best === null || item.href.length > best.length ? item.href : best;
  }, null);

  async function handleLogout() {
    // /auth/logout is POST-only on the server.
    try {
      await auth.logout();
    } catch {
      // Fall through — clearing the client-side session view is what matters.
    }
    window.location.href = "/login";
  }

  return (
    <aside className="flex h-screen w-60 flex-col border-r border-border bg-surface">
      <div className="flex h-16 items-center gap-3 border-b border-border px-5">
        <div className="flex h-8 w-8 items-center justify-center rounded-lg bg-accent">
          <svg className="h-4 w-4 text-white" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
            <path strokeLinecap="round" strokeLinejoin="round" d="M15.75 5.25a3 3 0 013 3m3 0a6 6 0 01-7.029 5.912c-.563-.097-1.159.026-1.563.43L10.5 17.25H8.25v2.25H6v2.25H2.25v-2.818c0-.597.237-1.17.659-1.591l6.499-6.499c.404-.404.527-1 .43-1.563A6 6 0 1121.75 8.25z" />
          </svg>
        </div>
        <div className="min-w-0">
          <span className="block text-base font-semibold leading-tight text-text-primary">Vantage</span>
          {org && <span className="block truncate text-xs text-text-secondary">{org.name}</span>}
        </div>
      </div>

      <nav className="flex-1 overflow-y-auto px-3 py-4">
        <ul className="space-y-1">
          {visibleItems.map((item) => {
            const isActive = activeHref === item.href;
            return (
              <li key={item.href}>
                <Link
                  href={item.href}
                  className={clsx(
                    "flex items-center gap-3 rounded-lg px-3 py-2.5 text-sm font-medium transition-colors",
                    isActive
                      ? "bg-accent/15 text-accent"
                      : "text-text-secondary hover:bg-surface-2 hover:text-text-primary"
                  )}
                >
                  {item.icon}
                  {item.label}
                </Link>
              </li>
            );
          })}
        </ul>
      </nav>

      <div className="border-t border-border px-4 py-3">
        {user && (
          <div className="mb-3">
            <p className="truncate text-sm font-medium text-text-primary">{user.name || user.email}</p>
            <p className="truncate text-xs text-text-secondary">
              {user.email}
              {user.role && <span className="ml-1 text-text-tertiary">· {user.role}</span>}
            </p>
          </div>
        )}
        <div className="flex items-center justify-between">
          <p className="text-xs text-text-secondary">Vantage v1.0</p>
          {user && (
            <button
              type="button"
              onClick={handleLogout}
              className="text-xs text-text-secondary transition-colors hover:text-danger"
            >
              Logout
            </button>
          )}
        </div>
      </div>
    </aside>
  );
}