"use client";

import { buildPriority1CalendarGrid, weekdayLabelsZh } from "@/lib/priority1/calendar-grid";
import { priority1CustomerDisplayUsd } from "@/lib/priority1/display-price";
import { P1_RESULT_UI } from "@/lib/priority1/ui-labels";
import type { Priority1DisplayLine } from "@/modules/priority1/quote-storage";

export type Priority1ShipmentSummary = {
  originZip: string;
  destinationZip: string;
  pickupDate: string;
  weightLb?: number;
  itemsLabel?: string;
};

type Props = {
  lines: Priority1DisplayLine[];
  shipment: Priority1ShipmentSummary;
  onRequestNewQuote?: () => void;
};

function formatUsd(n: number): string {
  return new Intl.NumberFormat("en-US", {
    minimumFractionDigits: 2,
    maximumFractionDigits: 2,
  }).format(n);
}

function lineDisplayUsd(line: Priority1DisplayLine): number {
  return priority1CustomerDisplayUsd(line);
}

export function Priority1FtlScheduleCalendar({
  lines,
  shipment,
  onRequestNewQuote,
}: Props) {
  const { monthLabel, cells } = buildPriority1CalendarGrid(
    shipment.pickupDate,
    lines,
  );
  const weekdays = weekdayLabelsZh();
  const lowest = lines.length
    ? Math.min(...lines.map((l) => lineDisplayUsd(l)))
    : null;

  return (
    <div className="flex min-h-[520px] bg-black text-white">
      <aside className="flex w-[280px] shrink-0 flex-col border-r border-neutral-800 bg-neutral-950 p-4">
        <div className="mb-4 flex h-36 items-center justify-center rounded border border-neutral-800 bg-neutral-900 text-xs text-neutral-500">
          路线地图（{shipment.originZip} → {shipment.destinationZip}）
        </div>
        <div className="mb-4 rounded border border-neutral-800 bg-neutral-900 p-3 text-sm">
          <p className="mb-2 text-xs font-bold tracking-wider text-neutral-400">
            {P1_RESULT_UI.shippingDetails}
          </p>
          <dl className="space-y-1 text-neutral-200">
            <div className="flex justify-between gap-2">
              <dt className="text-neutral-500">{P1_RESULT_UI.from}</dt>
              <dd>{shipment.originZip}</dd>
            </div>
            <div className="flex justify-between gap-2">
              <dt className="text-neutral-500">{P1_RESULT_UI.to}</dt>
              <dd>{shipment.destinationZip}</dd>
            </div>
            <div className="flex justify-between gap-2">
              <dt className="text-neutral-500">{P1_RESULT_UI.date}</dt>
              <dd>{shipment.pickupDate}</dd>
            </div>
            {shipment.weightLb != null && shipment.weightLb > 0 ? (
              <div className="flex justify-between gap-2">
                <dt className="text-neutral-500">{P1_RESULT_UI.weight}</dt>
                <dd>{shipment.weightLb} lb</dd>
              </div>
            ) : null}
            {shipment.itemsLabel ? (
              <div className="flex justify-between gap-2">
                <dt className="text-neutral-500">{P1_RESULT_UI.items}</dt>
                <dd className="text-right">{shipment.itemsLabel}</dd>
              </div>
            ) : null}
          </dl>
        </div>
        {onRequestNewQuote ? (
          <div className="mt-auto">
            <button
              type="button"
              onClick={onRequestNewQuote}
              className="w-full border border-neutral-600 bg-neutral-800 py-3 text-xs font-bold tracking-wide text-white hover:bg-neutral-700"
            >
              {P1_RESULT_UI.requestNewQuote}
            </button>
          </div>
        ) : null}
      </aside>

      <div className="flex flex-1 flex-col p-6">
        <h2 className="mb-4 text-2xl font-bold tracking-wide">
          {P1_RESULT_UI.ftlTitle}
        </h2>
        <div className="mb-6 rounded border border-neutral-800 bg-neutral-900/80 p-4 text-sm text-neutral-300">
          {P1_RESULT_UI.ftlIntro}
          {lowest != null ? (
            <span className="mt-1 block text-[#f5d000]">
              {P1_RESULT_UI.ftlLowest(formatUsd(lowest))}
            </span>
          ) : null}
        </div>

        <div className="rounded border border-neutral-300 bg-white p-4 text-black">
          <div className="mb-3 flex items-baseline justify-between">
            <h3 className="text-xl font-bold text-[#c9a000]">{P1_RESULT_UI.schedule}</h3>
            <span className="text-2xl font-light text-neutral-700">{monthLabel}</span>
          </div>
          <div className="grid grid-cols-7 gap-px bg-neutral-200">
            {weekdays.map((d) => (
              <div
                key={d}
                className="bg-white py-2 text-center text-xs font-semibold text-neutral-600"
              >
                {d}
              </div>
            ))}
            {cells.map((cell) => {
              const day = cell.date.getDate();
              const price =
                cell.line != null
                  ? lineDisplayUsd(cell.line)
                  : cell.priceUsd;
              const hasPrice = cell.inMonth && price != null && price > 0;
              return (
                <div
                  key={cell.date.toISOString()}
                  className={`min-h-[72px] bg-white p-1 text-center ${
                    cell.inMonth ? "" : "opacity-40"
                  }`}
                >
                  <div className="text-sm font-medium text-neutral-800">{day}</div>
                  {hasPrice ? (
                    <div className="mt-1 text-xs font-semibold text-neutral-900">
                      {formatUsd(price!)}
                    </div>
                  ) : cell.inMonth ? (
                    <div className="mt-1 text-[10px] text-neutral-400">—</div>
                  ) : null}
                </div>
              );
            })}
          </div>
        </div>
      </div>
    </div>
  );
}