Stepper with shipping route and stop details

"use client"

import { useRef, useState, type ReactNode } from "react"
import { Badge, type BadgeProps } from "@/components/reui/badge"
import { IconTile } from "@/components/reui/icon-tile"
import {
  Stepper,
  StepperContent,
  StepperIndicator,
  StepperItem,
  StepperNav,
  StepperPanel,
  StepperSeparator,
  StepperTitle,
  StepperTrigger,
} from "@/components/reui/stepper"
import { cn } from "cn"

import {
  Avatar,
  AvatarFallback,
  AvatarImage,
} from "@/components/ui/avatar"
import { Button } from "@/components/ui/button"
import { IconPlaceholder } from "@/app/(create)/components/icon-placeholder"

interface Detail {
  label: string
  value: string
  warning?: boolean
  badge?: BadgeProps["variant"]
  avatar?: string
}

interface Stop {
  code: string
  port: string
  carrier: string
  voyage: string
  terminal: string
  summary: string
  details: Detail[]
  progress?: number
}

const stops: Stop[] = [
  {
    code: "SGSIN",
    port: "Singapore",
    carrier: "Maersk Sealand",
    voyage: "214E",
    terminal: "Tuas",
    summary:
      "Loaded at Tuas onto Maersk Sealand, voyage 214E, and sailed on 17 May.",
    details: [
      { label: "Loaded", value: "16 May" },
      { label: "Departed", value: "17 May" },
      {
        label: "Captain",
        value: "M. Walberg",
        badge: "outline",
        avatar:
          "https://images.unsplash.com/photo-1535713875002-d1d0cf377fde?w=96&h=96&dpr=2&q=80",
      },
      { label: "B/L", value: "MSK8842A" },
    ],
  },
  {
    code: "LKCMB",
    port: "Colombo",
    carrier: "MSC Aurora",
    voyage: "088W",
    terminal: "SAGT",
    summary:
      "All 4 containers moved to MSC Aurora at SAGT and sailed on 22 May.",
    details: [
      { label: "Arrived", value: "21 May" },
      { label: "Departed", value: "22 May" },
      { label: "Containers", value: "4×40HC", warning: true },
      { label: "Transship", value: "Done", badge: "success-light" },
    ],
  },
  {
    code: "EGPSD",
    port: "Port Said",
    carrier: "MSC Aurora",
    voyage: "088W",
    terminal: "Med Sea",
    summary: "Through the Suez Canal on 26 May at 18 knots, now a day behind.",
    details: [
      { label: "Passed", value: "26 May" },
      { label: "Speed", value: "18kn" },
      { label: "Delay", value: "+1 day", badge: "warning-light" },
    ],
    progress: 4,
  },
  {
    code: "NLRTM",
    port: "Rotterdam",
    carrier: "MSC Aurora",
    voyage: "088W",
    terminal: "ECT Delta",
    summary:
      "Due at ECT Delta on 3 June to unload 1 container once customs clear it.",
    details: [
      { label: "ETA", value: "03 Jun" },
      { label: "ETD", value: "04 Jun" },
      { label: "Unload", value: "1×40HC", warning: true },
      { label: "Customs", value: "Pending", badge: "secondary" },
    ],
  },
  {
    code: "DEHAM",
    port: "Hamburg",
    carrier: "DB Cargo",
    voyage: "4410",
    terminal: "CTA",
    summary:
      "Due on 6 June, then the last 3 containers go on by DB Cargo train 4410.",
    details: [
      { label: "ETA", value: "06 Jun" },
      { label: "ETD", value: "07 Jun" },
      { label: "Unload", value: "3×40HC", warning: true },
      { label: "Onward", value: "Rail", badge: "secondary" },
    ],
  },
]

const segments = 6

// The 34px ring stays transparent and the 28px dot inside it carries the
// state color, so the 2px gap between them shows whatever surface is behind.
// The theme has no blue token, so the route takes the palette blue-500.
function Anchor({ className }: { className: string }) {
  return (
    <span
      className={cn(
        "flex size-7 items-center justify-center rounded-full",
        className
      )}
    >
      <IconPlaceholder
        lucide="AnchorIcon"
        tabler="IconAnchor"
        hugeicons="AnchorIcon"
        phosphor="AnchorIcon"
        remixicon="RiAnchorLine"
        className="size-3.5"
        aria-hidden="true"
      />
    </span>
  )
}

const reached = <Anchor className="bg-blue-500 text-white" />

const indicators = {
  completed: reached,
  active: reached,
  inactive: <Anchor className="bg-input text-foreground" />,
}

// The leg at sea is a 13px sine period repeated as a mask over a hard-stop
// gradient: blue for the distance sailed, ring for what is left. The style
// radius would clip the wave where it meets the ends, so it is squared off.
const wave =
  "bg-transparent bg-linear-to-r from-blue-500 from-75% to-ring/40 to-75% mask-[url('data:image/svg+xml,%3Csvg%20xmlns=%22http://www.w3.org/2000/svg%22%20viewBox=%220,0,13,8%22%3E%3Cpath%20d=%22M0,4Q3.25,-2.5,6.5,4T13,4%22%20fill=%22none%22%20stroke=%22%23000%22%20stroke-width=%221.5%22/%3E%3C/svg%3E')] mask-size-[0.8125rem_0.5rem] mask-repeat-x rounded-none! rtl:bg-linear-to-l rtl:mask-right group-data-[orientation=horizontal]/stepper-nav:h-2"

function Row({
  label,
  className,
  children,
}: {
  label: ReactNode
  className?: string
  children: ReactNode
}) {
  return (
    <div className={cn("flex items-center gap-1", className)}>
      <dt className="text-muted-foreground shrink-0">{label}</dt>
      <dd className="flex min-w-0 flex-1 items-center justify-end gap-1 self-stretch">
        {children}
      </dd>
    </div>
  )
}

// Skewed from its top end corner, so the slanted bar finishes flush with the
// values above it and leans forward in either direction.
function LegProgress({ value, to }: { value: number; to: string }) {
  return (
    <span
      role="progressbar"
      aria-label={`Progress to ${to}`}
      aria-valuemin={0}
      aria-valuemax={segments}
      aria-valuenow={value}
      className="flex origin-top-right -skew-x-20 gap-0.5 rtl:origin-top-left rtl:skew-x-20"
    >
      {Array.from({ length: segments }, (_, index) => (
        <span
          key={index}
          className={cn(
            "h-2 w-2.5 rounded-xs border",
            index < value
              ? "border-success/60 bg-success/50"
              : "border-ring/60 bg-ring/20"
          )}
        />
      ))}
    </span>
  )
}

export function Pattern() {
  const [current, setCurrent] = useState(3)
  const prevRef = useRef<HTMLButtonElement>(null)
  const nextRef = useRef<HTMLButtonElement>(null)
  // One past the last step marks every step complete. No tab is selected
  // then, so the last one keeps the tablist's tab stop.
  const allDone = current > stops.length

  function goTo(step: number) {
    setCurrent(step)
    // The pressed button disables itself at either end, so focus moves to
    // its partner.
    if (step === 1) nextRef.current?.focus()
    if (step > stops.length) prevRef.current?.focus()
  }

  return (
    <Stepper
      value={current}
      onValueChange={setCurrent}
      indicators={indicators}
      className="@container flex w-full max-w-250 flex-col gap-6"
      aria-label="Shipment route"
    >
      {/* The route fills its container and sheds detail as it narrows: every
          row from 56rem (the avatar from 58rem), the headers and first two
          rows from 48rem, and below 24rem only the current stop (the last
          once all are done) shows its code. */}
      <StepperNav>
        {stops.map((stop, index) => {
          const step = index + 1
          const next = stops[index + 1]

          return (
            <StepperItem
              key={stop.code}
              step={step}
              className="min-w-0 items-stretch justify-start group-data-[orientation=horizontal]/stepper-nav:flex-col"
            >
              {/* The header tucks 10px under the track and centers on the
                  span past the indicator. */}
              <div className="-mb-2.5 hidden flex-col items-center gap-1 ps-8.5 whitespace-nowrap @3xl:flex">
                <p className="text-sm font-medium">{stop.carrier}</p>
                <p className="flex items-center gap-1 text-xs font-medium text-blue-500">
                  {stop.voyage}
                  <span
                    aria-hidden="true"
                    className="before:bg-ring/40 flex w-2.5 justify-center before:h-3 before:w-px before:rotate-45"
                  />
                  {stop.terminal}
                </p>
              </div>

              <div className="flex h-8.5 items-center">
                <StepperTrigger
                  tabIndex={allDone && step === stops.length ? 0 : undefined}
                  aria-label={stop.port}
                >
                  <StepperIndicator className="border-input/50 size-8.5 border bg-transparent not-data-[state=inactive]:border-blue-500 data-[state=active]:bg-transparent data-[state=completed]:bg-transparent" />
                </StepperTrigger>
                <StepperSeparator
                  className={cn(
                    "bg-ring/20 m-0 data-[state=completed]:bg-blue-500",
                    step === current && wave
                  )}
                />
              </div>

              <div className="mt-2.5 flex flex-col gap-2 ps-0.5 pe-4">
                <StepperTitle
                  className={cn(
                    "whitespace-nowrap",
                    !(allDone && step === stops.length) &&
                      "@max-sm:not-data-[state=active]:sr-only"
                  )}
                >
                  {stop.code}
                </StepperTitle>

                <dl className="hidden flex-col gap-1 text-xs whitespace-nowrap @2xl:flex">
                  {stop.details.map((detail, row) => (
                    <Row
                      key={detail.label}
                      label={detail.label}
                      className={row > 1 ? "hidden @3xl:flex" : undefined}
                    >
                      {/* 2px dashes on a 4px pitch, spaced edge to edge so
                          neither end of the leader clips a dash. */}
                      <span
                        aria-hidden="true"
                        className="bg-ring/30 mb-1 h-px min-w-1 flex-1 self-end mask-[linear-gradient(to_right,transparent_25%,#000_0_75%,transparent_0)] mask-size-[0.25rem_100%] mask-repeat-space"
                      />
                      {detail.badge ? (
                        <Badge variant={detail.badge} radius="full">
                          {detail.avatar && (
                            <Avatar className="hidden size-3 @4xl:flex">
                              <AvatarImage src={detail.avatar} alt="" />
                              <AvatarFallback>
                                {detail.value.charAt(0)}
                              </AvatarFallback>
                            </Avatar>
                          )}
                          {detail.value}
                        </Badge>
                      ) : (
                        // Upcoming stops dim their figures, which stay
                        // estimates until the vessel gets there. Counts take
                        // yellow-600 to stay legible on white.
                        <span
                          className={cn(
                            "truncate font-medium",
                            detail.warning
                              ? "group-data-[state=inactive]/step:text-warning/60 text-yellow-600"
                              : "group-data-[state=inactive]/step:text-muted-foreground"
                          )}
                        >
                          {detail.value}
                        </span>
                      )}
                    </Row>
                  ))}

                  {next && stop.progress !== undefined && (
                    <Row
                      className="hidden @3xl:flex"
                      label={
                        <>
                          To{" "}
                          <span className="text-foreground font-medium">
                            {next.code}
                          </span>
                        </>
                      }
                    >
                      <LegProgress value={stop.progress} to={next.port} />
                    </Row>
                  )}
                </dl>
              </div>
            </StepperItem>
          )
        })}

        {/* The cargo goes on past the last stop, so the route ends in an
            arrow rather than another step. While the header shows, the 30px
            offset (the header less its tuck) levels it with the indicators. */}
        <IconTile
          radius="full"
          size="sm"
          aria-hidden="true"
          className="[--icon-tile-size:--spacing(8.5)] @3xl:mt-7.5"
        >
          <IconPlaceholder
            lucide="ArrowRightIcon"
            tabler="IconArrowRight"
            hugeicons="ArrowRight02Icon"
            phosphor="ArrowRightIcon"
            remixicon="RiArrowRightLine"
            className="text-muted-foreground size-3.5 rtl:rotate-180"
          />
        </IconTile>
      </StepperNav>

      <StepperPanel className="text-center">
        {stops.map((stop, index) => (
          <StepperContent key={stop.code} value={index + 1}>
            <p className="text-sm font-medium">{stop.port}</p>
            <p className="text-muted-foreground text-sm">{stop.summary}</p>
          </StepperContent>
        ))}
        <StepperContent value={stops.length + 1}>
          <p className="text-sm font-medium">Arrived in Hamburg</p>
          <p className="text-muted-foreground text-sm">
            Discharged at the terminal, the voyage is complete.
          </p>
        </StepperContent>
        <div className="mt-3 flex justify-center gap-2">
          <Button
            ref={prevRef}
            variant="outline"
            size="sm"
            disabled={current === 1}
            onClick={() => goTo(current - 1)}
          >
            Previous
          </Button>
          <Button
            ref={nextRef}
            variant="outline"
            size="sm"
            disabled={allDone}
            onClick={() => goTo(current + 1)}
          >
            Next
          </Button>
        </div>
      </StepperPanel>
    </Stepper>
  )
}