"use client"

import { useEffect, useRef } from "react"
import Link from "next/link"
import { usePathname } from "next/navigation"
import { useAuth } from "@/lib/auth"
import { useBrand } from "@/components/brand-provider"
import { DASHBOARD_NAVIGATION, currentHref } from "@/lib/dashboard-navigation"
import { cn } from "@/lib/utils"

// The ONE console navigation surface, in lux.cloud's shape.
//
// Desktop: a 236px sticky rail under the header, sections grouped under 11px
// uppercase labels, rows at 8px radius that fill with `accent` when active.
//
// Below `lg` the rail becomes a single horizontally-scrolling strip of the
// same rows. lux.cloud's note on why: wrapping the sections instead produced a
// five-row wall of pills eating a quarter of a phone screen above the fold on
// every page. The strip scrolls inside itself — the page body never scrolls
// sideways — and the active row is scrolled into view so you can always see
// where you are.

export function ConsoleSidebar() {
  const pathname = usePathname()
  const { isAdmin } = useAuth()
  const brand = useBrand()
  const ref = useRef<HTMLElement>(null)

  const groups = DASHBOARD_NAVIGATION.map((group) => ({
    ...group,
    items: group.items.filter((item) => !item.admin || isAdmin),
  })).filter((group) => group.items.length > 0)

  const active = currentHref(
    pathname,
    groups.flatMap((g) => g.items.map((i) => i.href))
  )

  useEffect(() => {
    ref.current?.querySelector('[data-active="true"]')?.scrollIntoView({ block: "nearest", inline: "nearest" })
  }, [pathname])

  const rowClass = (active: boolean) =>
    cn(
      "flex shrink-0 items-center justify-between gap-2 whitespace-nowrap rounded-md px-3 py-2 text-sm transition-colors max-lg:min-h-10 max-lg:scroll-mx-3",
      active
        ? "bg-accent font-medium text-accent-foreground"
        : "text-muted-foreground hover:bg-foreground/5 hover:text-foreground"
    )

  return (
    <nav
      ref={ref}
      aria-label="Console sections"
      className={cn(
        // Desktop rail.
        "sticky top-(--header-h) h-[calc(100dvh-var(--header-h))] w-(--sidebar-w) shrink-0 self-start overflow-y-auto border-r border-border px-3 pb-10 pt-5",
        // Phone/tablet strip.
        "no-scrollbar max-lg:static max-lg:h-auto max-lg:w-auto max-lg:flex-nowrap max-lg:gap-1 max-lg:overflow-x-auto max-lg:overflow-y-hidden max-lg:overscroll-x-contain max-lg:border-b max-lg:border-r-0 max-lg:px-3 max-lg:py-2 max-lg:[display:flex]"
      )}
    >
      {groups.map((group) => (
        // `display: contents` on the strip flattens the groups into the one
        // scrolling row without duplicating the markup for two layouts.
        <div key={group.label} className="mb-4 max-lg:mb-0 max-lg:[display:contents]">
          <div className="px-3 py-1.5 text-[11px] font-medium uppercase tracking-[0.08em] text-muted-foreground max-lg:hidden">
            {group.label}
          </div>
          {group.items.map((item) => (
            <Link
              key={item.href}
              href={item.href}
              data-active={item.href === active}
              aria-current={item.href === active ? "page" : undefined}
              className={rowClass(item.href === active)}
            >
              {item.name}
            </Link>
          ))}
        </div>
      ))}

      {/* Status is the brand's own page, off-site by definition. */}
      <div className="mb-4 max-lg:mb-0 max-lg:[display:contents]">
        <div className="px-3 py-1.5 text-[11px] font-medium uppercase tracking-[0.08em] text-muted-foreground max-lg:hidden">
          Platform
        </div>
        <a href={brand.statusUrl} target="_blank" rel="noreferrer" className={rowClass(false)}>
          <span>Status</span>
          <span aria-hidden="true" className="text-xs opacity-50">
            ↗
          </span>
        </a>
      </div>
    </nav>
  )
}