HealthLog/src/components/layout/sidebar-nav.tsx

"use client";

import { useMemo, useState } from "react";
import {
  Activity,
  Bell,
  Bug,
  ChevronsLeft,
  ChevronsRight,
  Droplets,
  Home,
  Info,
  Lightbulb,
  LogOut,
  Monitor,
  Moon,
  MoreVertical,
  Pill,
  Settings,
  Shield,
  Sun,
  Trophy,
  Waves,
} from "lucide-react";
import Link from "next/link";
import { usePathname } from "next/navigation";
import { cn } from "@/lib/utils";
import { Logo } from "@/components/ui/logo";
import { useAuth, useLogout } from "@/hooks/use-auth";
import { useTheme } from "@/components/providers";
import { useAppSettings } from "@/components/app-settings-provider";
import { useTranslations } from "@/lib/i18n/context";
import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar";
import {
  Tooltip,
  TooltipContent,
  TooltipProvider,
  TooltipTrigger,
} from "@/components/ui/tooltip";
import {
  DropdownMenu,
  DropdownMenuContent,
  DropdownMenuItem,
  DropdownMenuSeparator,
  DropdownMenuSub,
  DropdownMenuSubContent,
  DropdownMenuSubTrigger,
  DropdownMenuTrigger,
} from "@/components/ui/dropdown-menu";

const STORAGE_KEY = "healthlog-sidebar-collapsed";

const navItems = [
  { href: "/", tKey: "nav.dashboard", icon: Home, tourId: "nav-dashboard" },
  {
    href: "/measurements",
    tKey: "nav.measurements",
    icon: Activity,
    tourId: "nav-measurements",
  },
  { href: "/mood", tKey: "nav.mood", icon: Waves, tourId: "nav-mood" },
  {
    href: "/medications",
    tKey: "nav.medications",
    icon: Pill,
    tourId: "nav-medications",
  },
  // v1.4.15 Phase B5: `tourId` values match `data-tour-id` lookups
  // performed by the onboarding tour. Keep these stable — renaming
  // them silently breaks the spotlight cutout for that step.
  {
    href: "/insights",
    tKey: "nav.insights",
    icon: Lightbulb,
    tourId: "nav-insights",
  },
  {
    href: "/achievements",
    tKey: "nav.achievements",
    icon: Trophy,
    tourId: "nav-achievements",
  },
];

// v1.15.0 — the cycle nav entry, appended to the main list only when the
// account's `cycleTrackingEnabled` gate is true (resolved on `/api/auth/me`).
// Hidden by construction for accounts without the feature.
const cycleNavItem = {
  href: "/cycle",
  tKey: "nav.cycle",
  icon: Droplets,
  tourId: "nav-cycle",
} as const;

function getInitials(name: string): string {
  return name
    .split(/[\s._-]+/)
    .slice(0, 2)
    .map((s) => s[0]?.toUpperCase() ?? "")
    .join("");
}

function SidebarUserSection({ collapsed }: { collapsed: boolean }) {
  const { user } = useAuth();
  const logout = useLogout();
  const { theme, setTheme } = useTheme();
  const { t } = useTranslations();
  const avatarUrl = user?.avatarUrl ?? null;

  if (!user) return null;

  const themeIcon =
    theme === "system" ? (
      <Monitor className="h-4 w-4" />
    ) : theme === "dark" ? (
      <Moon className="h-4 w-4" />
    ) : (
      <Sun className="h-4 w-4" />
    );

  const dropdownContent = (
    <DropdownMenuContent
      side="right"
      align="end"
      className="w-60"
      sideOffset={8}
    >
      {/* R20 — the user header is the direct route into the account
          settings. Clicking the avatar / name jumps straight to
          `/settings/account` rather than making the user hunt for a
          separate "Settings" entry. */}
      <DropdownMenuItem asChild>
        <Link
          href="/settings/account"
          className="flex cursor-pointer items-center gap-3 px-2 py-2"
        >
          <Avatar className="h-9 w-9 shrink-0">
            {avatarUrl && <AvatarImage src={avatarUrl} alt={user.username} />}
            <AvatarFallback className="bg-primary/15 text-primary text-xs font-medium">
              {getInitials(user.username)}
            </AvatarFallback>
          </Avatar>
          <div className="min-w-0 flex-1">
            <p className="truncate text-sm font-semibold">{user.username}</p>
            {user.email && (
              <p className="text-muted-foreground truncate text-xs">
                {user.email}
              </p>
            )}
          </div>
        </Link>
      </DropdownMenuItem>
      <DropdownMenuSeparator />
      <DropdownMenuItem asChild>
        <Link href="/notifications" className="cursor-pointer">
          <Bell className="mr-2 h-4 w-4" />
          {t("nav.notifications")}
        </Link>
      </DropdownMenuItem>
      {/* The about section lives at the end of the settings shell nav;
          the avatar menu stays focused on account-level actions. */}
      <DropdownMenuSub>
        <DropdownMenuSubTrigger>
          {themeIcon}
          <span className="ml-2">{t("nav.theme")}</span>
        </DropdownMenuSubTrigger>
        <DropdownMenuSubContent>
          <DropdownMenuItem onClick={() => setTheme("system")}>
            <Monitor className="mr-2 h-4 w-4" />
            {t("nav.themeSystem")}
            {theme === "system" && (
              <span className="text-primary ml-auto text-xs">&#10003;</span>
            )}
          </DropdownMenuItem>
          <DropdownMenuItem onClick={() => setTheme("dark")}>
            <Moon className="mr-2 h-4 w-4" />
            {t("nav.themeDark")}
            {theme === "dark" && (
              <span className="text-primary ml-auto text-xs">&#10003;</span>
            )}
          </DropdownMenuItem>
          <DropdownMenuItem onClick={() => setTheme("light")}>
            <Sun className="mr-2 h-4 w-4" />
            {t("nav.themeLight")}
            {theme === "light" && (
              <span className="text-primary ml-auto text-xs">&#10003;</span>
            )}
          </DropdownMenuItem>
        </DropdownMenuSubContent>
      </DropdownMenuSub>
      <DropdownMenuSeparator />
      <DropdownMenuItem
        onClick={() => logout.mutate()}
        className="text-destructive focus:text-destructive focus:bg-destructive/10 cursor-pointer"
      >
        <LogOut className="mr-2 h-4 w-4" />
        {t("nav.logout")}
      </DropdownMenuItem>
    </DropdownMenuContent>
  );

  if (collapsed) {
    return (
      <div className="border-sidebar-border border-t p-3">
        <div className="flex items-center justify-center">
          <DropdownMenu>
            <DropdownMenuTrigger
              aria-label={t("nav.userMenu")}
              className="hover:bg-accent focus-visible:ring-ring/50 shrink-0 rounded-md p-1.5 transition-colors focus:outline-none focus-visible:ring-[3px]"
            >
              <Avatar className="h-8 w-8">
                {avatarUrl && (
                  <AvatarImage src={avatarUrl} alt={user.username} />
                )}
                <AvatarFallback className="bg-primary/15 text-primary text-xs font-medium">
                  {getInitials(user.username)}
                </AvatarFallback>
              </Avatar>
            </DropdownMenuTrigger>
            {dropdownContent}
          </DropdownMenu>
        </div>
      </div>
    );
  }

  return (
    <div className="border-sidebar-border border-t p-3">
      <div className="flex items-center gap-3 px-2 py-1">
        {/* R20 — the avatar + name in the expanded footer routes straight
            into the account settings; the kebab to the right still opens
            the rest of the user menu. */}
        <Link
          href="/settings/account"
          aria-label={t("nav.accountSettings")}
          className="hover:bg-accent flex min-w-0 flex-1 items-center gap-3 rounded-md transition-colors"
        >
          <Avatar className="h-8 w-8 shrink-0">
            {avatarUrl && <AvatarImage src={avatarUrl} alt={user.username} />}
            <AvatarFallback className="bg-primary/15 text-primary text-xs font-medium">
              {getInitials(user.username)}
            </AvatarFallback>
          </Avatar>
          <div className="min-w-0 flex-1">
            <p className="truncate text-sm font-medium">{user.username}</p>
            {user.email && (
              <p className="text-muted-foreground truncate text-xs">
                {user.email}
              </p>
            )}
          </div>
        </Link>
        <DropdownMenu>
          <DropdownMenuTrigger
            aria-label={t("nav.userMenu")}
            className="text-muted-foreground hover:text-foreground hover:bg-accent focus-visible:ring-ring/50 shrink-0 rounded-md p-1.5 transition-colors focus:outline-none focus-visible:ring-[3px]"
          >
            <MoreVertical className="h-4 w-4" />
          </DropdownMenuTrigger>
          {dropdownContent}
        </DropdownMenu>
      </div>
    </div>
  );
}

export function SidebarNav() {
  const pathname = usePathname();
  const { t } = useTranslations();
  const { user } = useAuth();
  const { bugReportEnabled } = useAppSettings();
  const isAdmin = user?.role === "ADMIN";
  // Match `/admin` exactly or any `/admin/...` sub-route for active-link
  // styling. Plain `startsWith("/admin")` would also flip for a
  // hypothetical future `/administrative` page, which is not the same
  // semantic surface. The Admin entry mirrors Settings: a single link
  // with no sub-item expansion in the global sidebar — `<AdminShell>`
  // renders its own per-section nav inside the page itself.
  const onAdminPage = pathname === "/admin" || pathname.startsWith("/admin/");
  // v1.15.5 — surface the cycle entry directly after Medications (before
  // Insights) when the gate resolves true, instead of tacking it on at the
  // end. Splice by the Medications index so the position survives a reorder
  // of the static list; fall back to append if the anchor ever moves.
  const visibleNavItems = useMemo(() => {
    if (!user?.cycleTrackingEnabled) return navItems;
    const afterMedications =
      navItems.findIndex((item) => item.href === "/medications") + 1;
    if (afterMedications <= 0) return [...navItems, cycleNavItem];
    return [
      ...navItems.slice(0, afterMedications),
      cycleNavItem,
      ...navItems.slice(afterMedications),
    ];
  }, [user?.cycleTrackingEnabled]);
  const [collapsed, setCollapsed] = useState(() => {
    if (typeof window === "undefined") return false;
    try {
      return localStorage.getItem(STORAGE_KEY) === "true";
    } catch {
      return false;
    }
  });

  function toggleCollapsed() {
    setCollapsed((prev) => {
      const next = !prev;
      try {
        localStorage.setItem(STORAGE_KEY, String(next));
      } catch {
        // Ignore storage errors
      }
      return next;
    });
  }

  function renderCollapseToggle(className?: string) {
    return (
      <Tooltip>
        <TooltipTrigger asChild>
          <button
            onClick={toggleCollapsed}
            className={cn(
              "text-muted-foreground/80 hover:text-foreground hover:bg-accent z-20 rounded-md p-1 transition-colors",
              className,
            )}
            aria-label={t("nav.collapseSidebar")}
            aria-expanded={!collapsed}
          >
            {collapsed ? (
              <ChevronsRight className="h-3.5 w-3.5" />
            ) : (
              <ChevronsLeft className="h-3.5 w-3.5" />
            )}
          </button>
        </TooltipTrigger>
        <TooltipContent side="right" sideOffset={8}>
          {t("nav.collapseSidebar")}
        </TooltipContent>
      </Tooltip>
    );
  }

  return (
    <TooltipProvider delayDuration={0}>
      <aside
        aria-label={t("nav.sidebar")}
        className={cn(
          "bg-sidebar border-sidebar-border relative hidden h-full flex-shrink-0 border-r transition-[width] duration-200 md:flex md:flex-col",
          collapsed ? "w-16" : "w-64",
        )}
      >
        {/* Logo */}
        <div
          className={cn(
            "border-sidebar-border border-b",
            collapsed ? "px-3" : "px-6",
          )}
        >
          <Link
            href="/"
            className={cn(
              "flex h-16 items-center",
              collapsed ? "justify-center px-0" : "gap-2",
            )}
          >
            <Logo className="text-primary shrink-0" size={24} />
            {!collapsed && (
              <span className="text-lg font-bold tracking-tight">
                HealthLog
              </span>
            )}
          </Link>
        </div>

        <nav
          aria-label={t("nav.mainNavigation")}
          className={cn("flex-1 overflow-y-auto", collapsed ? "p-1.5" : "p-3")}
        >
          {collapsed ? (
            <div className="mb-1 flex justify-center">
              {renderCollapseToggle()}
            </div>
          ) : (
            // v1.4.33 IW7 — drop the "Home" group label. The sidebar
            // has exactly one nav group, and the first entry is
            // already "Dashboard" pointing to `/`, so the previous
            // "HOME / Dashboard" pairing read as if there were two
            // separate destinations for the homepage. The collapse
            // toggle stays anchored to the top-right of the strip so
            // the visual rhythm of the sidebar header is unchanged.
            <div className="relative mb-1 flex h-5 items-center justify-end">
              {renderCollapseToggle()}
            </div>
          )}
          <div className="space-y-1">
            {visibleNavItems.map((item) => {
              const isActive =
                item.href === "/"
                  ? pathname === "/"
                  : pathname.startsWith(item.href);
              const label = t(item.tKey);

              if (collapsed) {
                return (
                  <Tooltip key={item.href}>
                    <TooltipTrigger asChild>
                      <Link
                        href={item.href}
                        aria-current={isActive ? "page" : undefined}
                        data-tour-id={item.tourId}
                        className={cn(
                          "flex items-center justify-center rounded-lg p-2.5 transition-colors",
                          isActive
                            ? "bg-primary/10 text-primary"
                            : "text-foreground hover:bg-accent",
                        )}
                      >
                        <item.icon className="h-4 w-4" />
                      </Link>
                    </TooltipTrigger>
                    <TooltipContent side="right" sideOffset={8}>
                      {label}
                    </TooltipContent>
                  </Tooltip>
                );
              }

              return (
                <Link
                  key={item.href}
                  href={item.href}
                  aria-current={isActive ? "page" : undefined}
                  data-tour-id={item.tourId}
                  className={cn(
                    "flex items-center gap-3 rounded-lg px-3 py-2.5 text-sm font-medium transition-colors",
                    isActive
                      ? "bg-primary/10 text-primary"
                      : "text-foreground hover:bg-accent",
                  )}
                >
                  <item.icon className="h-4 w-4" />
                  {label}
                </Link>
              );
            })}
          </div>
        </nav>

        {/* Bottom utility links */}
        <div className={cn("space-y-1 pb-1", collapsed ? "px-1.5" : "px-3")}>
          {collapsed ? (
            <>
              {bugReportEnabled && (
                <Tooltip>
                  <TooltipTrigger asChild>
                    <Link
                      href="/bugreport"
                      aria-current={
                        pathname === "/bugreport" ? "page" : undefined
                      }
                      className={cn(
                        "flex items-center justify-center rounded-lg p-2.5 transition-colors",
                        pathname === "/bugreport"
                          ? "bg-primary/10 text-primary"
                          : "text-foreground hover:bg-accent",
                      )}
                    >
                      <Bug className="h-4 w-4" />
                    </Link>
                  </TooltipTrigger>
                  <TooltipContent side="right" sideOffset={8}>
                    {t("nav.bugreport")}
                  </TooltipContent>
                </Tooltip>
              )}
              {isAdmin && (
                <Tooltip>
                  <TooltipTrigger asChild>
                    <Link
                      href="/admin"
                      aria-current={onAdminPage ? "page" : undefined}
                      className={cn(
                        "flex items-center justify-center rounded-lg p-2.5 transition-colors",
                        onAdminPage
                          ? "bg-primary/10 text-primary"
                          : "text-foreground hover:bg-accent",
                      )}
                    >
                      <Shield className="h-4 w-4" />
                    </Link>
                  </TooltipTrigger>
                  <TooltipContent side="right" sideOffset={8}>
                    {t("nav.admin")}
                  </TooltipContent>
                </Tooltip>
              )}
              <Tooltip>
                <TooltipTrigger asChild>
                  <Link
                    href="/settings/account"
                    aria-current={
                      pathname.startsWith("/settings") ? "page" : undefined
                    }
                    data-tour-id="nav-settings"
                    className={cn(
                      "flex items-center justify-center rounded-lg p-2.5 transition-colors",
                      pathname.startsWith("/settings")
                        ? "bg-primary/10 text-primary"
                        : "text-foreground hover:bg-accent",
                    )}
                  >
                    <Settings className="h-4 w-4" />
                  </Link>
                </TooltipTrigger>
                <TooltipContent side="right" sideOffset={8}>
                  {t("nav.settings")}
                </TooltipContent>
              </Tooltip>
            </>
          ) : (
            <>
              {bugReportEnabled && (
                <Link
                  href="/bugreport"
                  aria-current={pathname === "/bugreport" ? "page" : undefined}
                  className={cn(
                    "flex items-center gap-3 rounded-lg px-3 py-2.5 text-sm font-medium transition-colors",
                    pathname === "/bugreport"
                      ? "bg-primary/10 text-primary"
                      : "text-foreground hover:bg-accent",
                  )}
                >
                  <Bug className="h-4 w-4" />
                  {t("nav.bugreport")}
                </Link>
              )}
              {isAdmin && (
                <Link
                  href="/admin"
                  aria-current={onAdminPage ? "page" : undefined}
                  className={cn(
                    "flex items-center gap-3 rounded-lg px-3 py-2.5 text-sm font-medium transition-colors",
                    onAdminPage
                      ? "bg-primary/10 text-primary"
                      : "text-foreground hover:bg-accent",
                  )}
                >
                  <Shield className="h-4 w-4" />
                  {t("nav.admin")}
                </Link>
              )}
              <Link
                href="/settings/account"
                aria-current={
                  pathname.startsWith("/settings") ? "page" : undefined
                }
                data-tour-id="nav-settings"
                className={cn(
                  "flex items-center gap-3 rounded-lg px-3 py-2.5 text-sm font-medium transition-colors",
                  pathname.startsWith("/settings")
                    ? "bg-primary/10 text-primary"
                    : "text-foreground hover:bg-accent",
                )}
              >
                <Settings className="h-4 w-4" />
                {t("nav.settings")}
              </Link>
            </>
          )}
        </div>

        <SidebarUserSection collapsed={collapsed} />
      </aside>
    </TooltipProvider>
  );
}