"use client";

import { ChevronDown, Plus } from "lucide-react";
import { Fragment, useState } from "react";
import { toast } from "sonner";
import { MoneyInput } from "@/components/money-input";
import { ResponsiveDialog } from "@/components/responsive-dialog";
import { Button } from "@/components/ui/button";
import { Field, FieldDescription, FieldError, FieldGroup, FieldLabel } from "@/components/ui/field";
import { Input } from "@/components/ui/input";
import {
  Select,
  SelectContent,
  SelectItem,
  SelectTrigger,
  SelectValue,
} from "@/components/ui/select";
import { tr } from "@/i18n/tr";
import { cn } from "@/lib/utils";
import { ASSET_KEYS, ASSETS, type AssetKey } from "@/shared/assets";
import { todayIstanbul } from "@/shared/dates";
import { formatDate, formatMoney } from "@/shared/format";
import { formatMoneyInput } from "@/shared/money";
import { savePriceAction } from "../actions";
import type { PriceRow } from "../service";

const t = tr.prices;
const d = (ymd: string) => formatDate(`${ymd}T12:00:00+03:00`);

export function PricesView({ rows, canWrite }: { rows: PriceRow[]; canWrite: boolean }) {
  const [editing, setEditing] = useState<AssetKey | null>(null);
  const [openRow, setOpenRow] = useState<AssetKey | null>(null);

  return (
    <div className="flex flex-col gap-4">
      {canWrite ? (
        <div className="flex justify-end">
          <Button onClick={() => setEditing("gram_gold")}>
            <Plus />
            {t.add}
          </Button>
        </div>
      ) : null}
      <div className="overflow-x-auto rounded-xl border bg-card">
        <table className="w-full text-sm">
          <thead className="text-xs text-muted-foreground">
            <tr className="border-b">
              <th className="p-3 text-left font-normal">{t.asset}</th>
              <th className="p-3 text-right font-normal">{t.buy}</th>
              <th className="p-3 text-right font-normal">{t.sell}</th>
              <th className="p-3 text-right font-normal">{t.date}</th>
              <th className="w-10" />
            </tr>
          </thead>
          <tbody className="divide-y tabular-nums">
            {rows.map((r) => (
              <Fragment key={r.assetKey}>
                <tr>
                  <td className="p-3">
                    <button
                      type="button"
                      className="flex items-center gap-1 text-left font-medium disabled:cursor-default"
                      onClick={() => setOpenRow(openRow === r.assetKey ? null : r.assetKey)}
                      disabled={r.history.length < 2}
                      aria-expanded={openRow === r.assetKey}
                    >
                      {r.history.length > 1 ? (
                        <ChevronDown
                          className={cn(
                            "size-4 transition-transform",
                            openRow === r.assetKey && "rotate-180",
                          )}
                        />
                      ) : null}
                      {ASSETS[r.assetKey].label}
                      <span className="text-xs font-normal text-muted-foreground">
                        {t.perUnit(ASSETS[r.assetKey].unit)}
                      </span>
                    </button>
                  </td>
                  <td className="p-3 text-right">
                    {r.latest ? formatMoney(r.latest.buyMinor) : "—"}
                  </td>
                  <td className="p-3 text-right">
                    {r.latest ? formatMoney(r.latest.sellMinor) : "—"}
                  </td>
                  <td className="p-3 text-right text-muted-foreground">
                    {r.latest ? d(r.latest.date) : t.noPrice}
                  </td>
                  <td className="p-1 text-right">
                    {canWrite ? (
                      <Button
                        size="icon-sm"
                        variant="ghost"
                        onClick={() => setEditing(r.assetKey)}
                        aria-label={`${t.add}: ${ASSETS[r.assetKey].label}`}
                      >
                        <Plus />
                      </Button>
                    ) : null}
                  </td>
                </tr>
                {openRow === r.assetKey
                  ? r.history.slice(1).map((h) => (
                      <tr key={h.date} className="bg-muted/30 text-muted-foreground">
                        <td className="p-2 pl-9 text-xs">{t.history}</td>
                        <td className="p-2 text-right">{formatMoney(h.buyMinor)}</td>
                        <td className="p-2 text-right">{formatMoney(h.sellMinor)}</td>
                        <td className="p-2 text-right">{d(h.date)}</td>
                        <td />
                      </tr>
                    ))
                  : null}
              </Fragment>
            ))}
          </tbody>
        </table>
      </div>
      {editing ? (
        <PriceForm
          key={editing}
          assetKey={editing}
          latest={rows.find((r) => r.assetKey === editing)?.latest ?? null}
          onClose={() => setEditing(null)}
        />
      ) : null}
    </div>
  );
}

function PriceForm({
  assetKey: initial,
  latest,
  onClose,
}: {
  assetKey: AssetKey;
  latest: PriceRow["latest"];
  onClose: () => void;
}) {
  const [v, setV] = useState({
    assetKey: initial,
    date: todayIstanbul(),
    buy: latest ? formatMoneyInput(latest.buyMinor) : "",
    sell: latest ? formatMoneyInput(latest.sellMinor) : "",
  });
  const [errors, setErrors] = useState<Record<string, string | undefined>>({});
  const [busy, setBusy] = useState(false);

  async function submit(e: React.FormEvent) {
    e.preventDefault();
    setBusy(true);
    const r = await savePriceAction(v);
    setBusy(false);
    if (r.ok) {
      toast.success(t.saved);
      onClose();
    } else setErrors({ ...r.fieldErrors, root: r.fieldErrors ? undefined : r.error });
  }

  return (
    <ResponsiveDialog
      open
      onOpenChange={(o) => !o && onClose()}
      title={t.add}
      footer={
        <>
          <Button variant="outline" type="button" onClick={onClose}>
            {tr.common.cancel}
          </Button>
          <Button type="submit" form="price-form" disabled={busy}>
            {tr.common.save}
          </Button>
        </>
      }
    >
      <form id="price-form" onSubmit={submit} noValidate>
        <FieldGroup>
          <div className="grid grid-cols-[1fr_auto] gap-3">
            <Field>
              <FieldLabel htmlFor="pr-asset">{t.asset}</FieldLabel>
              <Select
                value={v.assetKey}
                onValueChange={(x) => setV((s) => ({ ...s, assetKey: x as AssetKey }))}
              >
                <SelectTrigger id="pr-asset" className="w-full">
                  <SelectValue>{ASSETS[v.assetKey].label}</SelectValue>
                </SelectTrigger>
                <SelectContent>
                  {ASSET_KEYS.map((k) => (
                    <SelectItem key={k} value={k}>
                      {ASSETS[k].label}
                    </SelectItem>
                  ))}
                </SelectContent>
              </Select>
            </Field>
            <Field data-invalid={Boolean(errors.date)}>
              <FieldLabel htmlFor="pr-date">{t.date}</FieldLabel>
              <Input
                id="pr-date"
                type="date"
                value={v.date}
                max={todayIstanbul()}
                onChange={(e) => setV((s) => ({ ...s, date: e.target.value }))}
              />
              {errors.date ? <FieldError>{errors.date}</FieldError> : null}
            </Field>
          </div>
          <div className="grid grid-cols-2 gap-3">
            <Field data-invalid={Boolean(errors.buy)}>
              <FieldLabel htmlFor="pr-buy">{t.buy}</FieldLabel>
              <MoneyInput
                id="pr-buy"
                value={v.buy}
                onChange={(x) => setV((s) => ({ ...s, buy: x }))}
                autoFocus
              />
              {errors.buy ? <FieldError>{errors.buy}</FieldError> : null}
            </Field>
            <Field>
              <FieldLabel htmlFor="pr-sell">{t.sell}</FieldLabel>
              <MoneyInput
                id="pr-sell"
                value={v.sell}
                onChange={(x) => setV((s) => ({ ...s, sell: x }))}
              />
            </Field>
          </div>
          <FieldDescription className="-mt-2">{t.sellHint}</FieldDescription>
          {errors.root ? <FieldError>{errors.root}</FieldError> : null}
        </FieldGroup>
      </form>
    </ResponsiveDialog>
  );
}