deadhead-space-freight-tycoon/apps/web/src/screens/Fleet.tsx

import { content } from "@deadhead/content";
import type { Dispatch, Ship } from "@deadhead/schema";
import {
  dispatchProgress,
  realToGame,
  tripFuelCost,
  validateReposition,
  type RepositionFailure,
} from "@deadhead/sim";
import { useState } from "react";
import { Link } from "react-router";
import { useClock } from "../clock/clock";
import { Countdown } from "../components/Countdown";
import { ShipUpgrades } from "./ShipUpgrades";
import { formatClock, formatCredits, formatDuration, locationName, shipModelName } from "../format";
import { location, shipModel, tripRealMs, shipStatsOf, simShip } from "../game";
import { errorMessage, useGameAction, useLoadedPlayer } from "../state/actions";
import {
  Art,
  Button,
  buttonClass,
  Icon,
  Meter,
  Panel,
  Pill,
  Screen,
  ScreenHeader,
  Sheet,
} from "../ui";

/** All ships, their pilots and flights; any idle ship can deadhead (Steps 9.6, 10B.8). */
export function Fleet() {
  const state = useLoadedPlayer();
  const [deadheading, setDeadheading] = useState<Ship | null>(null);
  const [upgrading, setUpgrading] = useState<string | null>(null);

  const flying = state.ships.filter((s) => s.status === "in-flight").length;

  return (
    <Screen className="max-w-4xl">
      <ScreenHeader
        title="Fleet"
        eyebrow={
          state.ships.length > 0
            ? `${state.ships.length} ${state.ships.length === 1 ? "ship" : "ships"} · ${flying} flying`
            : "Your ships"
        }
        icon="fleet"
      />
      {state.ships.length === 0 ? (
        <Panel tone="muted" className="flex flex-col items-center gap-3 py-8 text-center">
          <Art sprite="ship-courier" className="size-20 opacity-60" />
          <p className="text-sm text-ink-300">
            No ships yet —{" "}
            <Link to="/market" className="font-semibold text-amber-300 underline">
              visit the Market
            </Link>
            .
          </p>
        </Panel>
      ) : (
        <ul className="grid gap-3 md:grid-cols-2">
          {state.ships.map((ship) => (
            <ShipRow
              key={ship.id}
              ship={ship}
              dispatch={state.activeDispatches.find((d) => d.id === ship.dispatchId)}
              pilotName={state.pilots.find((p) => p.id === ship.pilotId)?.name ?? null}
              onDeadhead={() => setDeadheading(ship)}
              onUpgrades={() => setUpgrading(ship.id)}
            />
          ))}
        </ul>
      )}
      {deadheading && <DeadheadPicker ship={deadheading} onClose={() => setDeadheading(null)} />}
      {upgrading && <ShipUpgrades shipId={upgrading} onClose={() => setUpgrading(null)} />}
    </Screen>
  );
}

function ShipRow(props: {
  ship: Ship;
  dispatch: Dispatch | undefined;
  pilotName: string | null;
  onDeadhead: () => void;
  onUpgrades: () => void;
}) {
  const { ship, dispatch, pilotName } = props;
  const now = useClock((s) => s.now);
  const progress = dispatch ? Math.round(dispatchProgress(dispatch, now) * 100) : 0;
  const model = shipModel(ship.modelId);
  // In the upgrade shop until then (CR-009); the clock decides, so it ends on time.
  const inShop = ship.inShopUntil !== null && now < ship.inShopUntil;

  return (
    <Panel as="li" tone={dispatch ? "cyan" : "default"} className="flex flex-col gap-3">
      <div className="flex items-center gap-3">
        <div className="relative grid size-20 shrink-0 place-items-center rounded-xl bg-radial from-cyan-400/15 to-transparent to-70%">
          <Art
            sprite={model.sprite}
            className={`size-18 drop-shadow-[0_6px_10px_rgb(0_0_0/0.7)] ${dispatch ? "rotate-45" : ""}`}
          />
        </div>
        <div className="min-w-0 flex-1">
          <div className="flex items-start justify-between gap-2">
            <span className="truncate font-display text-lg font-bold tracking-wide">
              {ship.name}
            </span>
            {dispatch ? (
              <Pill tone="cyan" icon="send">
                In flight
              </Pill>
            ) : inShop ? (
              <Pill tone="amber">In the shop</Pill>
            ) : (
              <Pill tone="emerald">Idle</Pill>
            )}
          </div>
          <div className="text-xs text-ink-400">{shipModelName(ship.modelId)}</div>
          <div className="mt-1 text-sm text-ink-200">
            {dispatch
              ? `${locationName(dispatch.originId)} → ${locationName(dispatch.destinationId)}`
              : `At ${locationName(ship.locationId ?? "")}`}
            {" · "}
            <span className={pilotName ? "text-ink-300" : "text-amber-300"}>
              {pilotName ?? "No pilot"}
            </span>
          </div>
        </div>
      </div>
      {dispatch && (
        <div>
          <Meter label={`${ship.name} progress`} value={progress} tone="cyan" />
          <div className="mt-1 flex justify-between font-display text-xs text-ink-400">
            <span>{progress}%</span>
            <span>
              Arrives in{" "}
              <span className="text-cyan-200">
                <Countdown to={dispatch.arrivalAt} />
              </span>
            </span>
          </div>
        </div>
      )}
      {inShop && (
        <p aria-label={`${ship.name} shop`} className="font-display text-sm text-amber-200">
          In the shop — <Countdown to={ship.inShopUntil!} format={formatClock} done="done" />
        </p>
      )}
      {ship.status === "idle" && !inShop && (
        <div className="mt-auto flex flex-wrap gap-2">
          {ship.locationId && (
            <Link
              to={`/contracts?location=${ship.locationId}`}
              className={`${buttonClass("primary", "sm")} flex-1 basis-40`}
            >
              <Icon name="jobs" className="size-4" />
              Find work here
            </Link>
          )}
          <Button
            variant="secondary"
            size="sm"
            onClick={props.onDeadhead}
            className="flex-1 basis-40"
          >
            <Icon name="send" className="size-4" />
            Deadhead (fly empty)
          </Button>
        </div>
      )}
      <Button
        variant="ghost"
        size="sm"
        onClick={props.onUpgrades}
        aria-label={`Upgrades for ${ship.name}`}
      >
        Upgrades
        {Object.keys(ship.upgrades).length > 0 &&
          ` · ${Object.values(ship.upgrades).reduce((a, b) => a + b, 0)} installed`}
      </Button>
    </Panel>
  );
}

/** Why a deadhead destination is unavailable, in plain words. */
const DEADHEAD_REASONS: Partial<Record<RepositionFailure, string>> = {
  "cannot-land": "Can't land there",
  "out-of-range": "Out of range",
  "would-strand": "Would be stranded",
  "insufficient-credits": "Not enough credits for fuel",
  "ship-in-shop": "Ship is in the shop",
  "pilot-resting": "Pilot is resting",
  "pilot-not-idle": "Pilot is flying",
  "pilot-not-assigned": "No pilot assigned",
};

/**
 * Fly an idle ship empty to any other discovered location, paying fuel only
 * (CR-002). The sim decides which destinations are possible, as the server will.
 */
export function DeadheadPicker({ ship, onClose }: { ship: Ship; onClose: () => void }) {
  const state = useLoadedPlayer();
  const now = useClock((s) => s.now);
  const reposition = useGameAction("createDispatch");
  // Effective stats: upgraded fuel tanks reach farther (CR-009).
  const model = shipStatsOf(ship);
  const origin = ship.locationId!;
  const pilot = state.pilots.find((p) => p.assignedShipId === ship.id) ?? null;
  const discovered = state.locations.filter((l) => l.discovered).map((l) => l.id);
  const discoveredIds = new Set(discovered);
  const gameNow = realToGame(now, content.config);

  const options = discovered
    .filter((id) => id !== origin)
    .map((id) => {
      const check = validateReposition(
        {
          ship: simShip(ship),
          pilot: {
            id: pilot?.id ?? "",
            isAvatar: pilot?.isAvatar ?? false,
            assignedShipId: pilot ? ship.id : null,
            inFlight: pilot?.status === "in-flight",
            skills: pilot?.skills ?? {},
            restEndsAt: pilot?.restEndsAt ?? null,
          },
          destinationId: id,
          discoveredIds,
          credits: state.company.credits,
          now,
        },
        content,
      );
      return {
        id,
        problem: check.ok ? null : (DEADHEAD_REASONS[check.reason] ?? check.reason),
        fuelCost: tripFuelCost(model, location(origin), location(id), gameNow),
        tripMs: tripRealMs(model, origin, id, 0, now),
      };
    });

  return (
    <Sheet
      titleId="deadhead-title"
      eyebrow="Fly empty"
      title={`Deadhead ${ship.name}`}
      subtitle={`Fly empty from ${locationName(origin)} to another place you know. You pay fuel only.`}
    >
      <ul className="mt-4 space-y-2">
        {options.map((option) => {
          const sprite = content.location(option.id)?.sprite;
          return (
            <li key={option.id}>
              <button
                type="button"
                aria-label={locationName(option.id)}
                disabled={option.problem !== null || reposition.isPending}
                onClick={() =>
                  reposition.mutate(
                    {
                      kind: "reposition",
                      shipId: ship.id,
                      pilotId: pilot!.id,
                      destinationId: option.id,
                    },
                    { onSuccess: onClose },
                  )
                }
                className="flex w-full items-center gap-3 rounded-xl border border-space-600 bg-space-900/60 p-3 text-left transition hover:border-amber-400/70 hover:bg-amber-500/10 active:scale-[0.99] disabled:pointer-events-none disabled:opacity-55"
              >
                {sprite && <Art sprite={sprite} className="size-10 shrink-0" />}
                <span className="min-w-0 flex-1">
                  <span className="flex items-baseline justify-between gap-2">
                    <span className="font-display font-bold tracking-wide">
                      {locationName(option.id)}
                    </span>
                    <span className="font-display text-sm text-ink-300 tabular-nums">
                      {formatCredits(option.fuelCost)} fuel · {formatDuration(option.tripMs)}
                    </span>
                  </span>
                  {option.problem && (
                    <span className="mt-0.5 block text-sm text-rose-300">{option.problem}</span>
                  )}
                </span>
              </button>
            </li>
          );
        })}
      </ul>
      {reposition.isError && (
        <p role="alert" className="mt-3 text-sm text-rose-300">
          {errorMessage(reposition.error)}
        </p>
      )}
      <Button variant="secondary" block onClick={onClose} className="mt-4">
        Cancel
      </Button>
    </Sheet>
  );
}