import { AlertTriangle, Landmark } from "lucide-react";
import Link from "next/link";
import { KAKEIBO_COLOR, KakeiboDot } from "@/features/categories/components/kakeibo-badge";
import { tr } from "@/i18n/tr";
import { cn } from "@/lib/utils";
import { formatMoney } from "@/shared/format";
import { KAKEIBO_GROUPS, type KakeiboGroup } from "@/shared/kakeibo";
import type { KakeiboReport } from "../kakeibo";
import { Change, formatPct } from "./report-frame";

const k = tr.kakeibo;
const t = tr.reports.kakeiboReport;

/** Dört grubun (ve grupsuzun) harcamadaki payı: tek yığılmış çubuk + lejant + tablo. */
function Composition({ data }: { data: KakeiboReport }) {
  const s = data.now.summary;
  const parts = [
    ...KAKEIBO_GROUPS.map((g) => ({
      key: g,
      label: k.groups[g],
      share: s.shares[g],
      color: KAKEIBO_COLOR[g],
    })),
    ...(s.ungroupedMinor
      ? [
          {
            key: "UNGROUPED",
            label: k.ungrouped,
            share: s.ungroupedShare,
            color: "var(--muted-foreground)",
          },
        ]
      : []),
  ].filter((p) => p.share > 0);
  return (
    <div className="flex flex-col gap-2">
      <div
        className="flex h-4 w-full gap-0.5 overflow-hidden rounded-md bg-muted"
        role="img"
        aria-label={t.chartLabel}
      >
        {parts.map((p) => (
          <div
            key={p.key}
            className="h-full first:rounded-l-md last:rounded-r-md"
            style={{ width: `${p.share}%`, backgroundColor: p.color }}
            title={`${p.label}: ${formatPct(p.share)}`}
          />
        ))}
      </div>
      <ul className="flex flex-wrap gap-x-4 gap-y-1 text-xs text-muted-foreground">
        {parts.map((p) => (
          <li key={p.key} className="flex items-center gap-1.5">
            <span
              aria-hidden
              className="size-2.5 rounded-sm"
              style={{ backgroundColor: p.color }}
            />
            {p.label} <span className="tabular-nums">{formatPct(p.share)}</span>
          </li>
        ))}
      </ul>
    </div>
  );
}

function GroupCard({ data, group }: { data: KakeiboReport; group: KakeiboGroup }) {
  const s = data.now.summary;
  const rows = data.now.byClass[group];
  const ch = data.change[group];
  return (
    <section
      aria-labelledby={`kg-${group}`}
      className="flex flex-col gap-2 rounded-xl border bg-card p-4"
    >
      <header className="flex items-start gap-2">
        <KakeiboDot group={group} className="mt-1.5" />
        <div className="min-w-0 flex-1">
          <h2 id={`kg-${group}`} className="font-medium">
            {k.groups[group]}
          </h2>
          <p className="text-xs text-muted-foreground">{k.groupHints[group]}</p>
        </div>
        <div className="text-right">
          <p className="text-lg font-semibold tabular-nums">{formatMoney(s.groups[group])}</p>
          <p className="text-xs text-muted-foreground tabular-nums">
            {formatPct(s.shares[group])} ·{" "}
            <Change minor={ch.minor} pct={ch.pct} format={formatMoney} />
          </p>
        </div>
      </header>
      {rows.length ? (
        <ul className="divide-y text-sm">
          {rows.map((r) => (
            <li key={r.id} className="flex justify-between gap-3 py-1.5">
              <span className="min-w-0 truncate">{r.path}</span>
              <span className="shrink-0 tabular-nums">{formatMoney(r.amountMinor)}</span>
            </li>
          ))}
        </ul>
      ) : (
        <p className="text-sm text-muted-foreground">{t.noSpending}</p>
      )}
    </section>
  );
}

/** /raporlar/kakeibo — dört grup, banka maliyeti ve grupsuz harcamalar. */
export function KakeiboReportView({ data }: { data: KakeiboReport }) {
  const s = data.now.summary;
  const bank = data.now.byClass.BANK_COST;
  const ungrouped = data.now.byClass.UNGROUPED;
  const bankChange = data.change.BANK_COST;
  return (
    <div className="flex flex-col gap-4">
      <div className="grid gap-3 md:grid-cols-[minmax(0,1fr)_auto]">
        <div className="flex flex-col gap-3 rounded-xl border bg-card p-4">
          <div className="flex items-baseline justify-between gap-3">
            <span className="text-sm text-muted-foreground">{t.spending}</span>
            <span className="text-xl font-semibold tabular-nums">
              {formatMoney(s.spendingMinor)}
            </span>
          </div>
          <Composition data={data} />
        </div>
        <div className="flex flex-col justify-between gap-1 rounded-xl border bg-card p-4 md:w-64">
          <span className="flex items-center gap-1.5 text-sm text-muted-foreground">
            <Landmark className="size-4" aria-hidden />
            {k.bankCost}
          </span>
          <span className="text-xl font-semibold tabular-nums">{formatMoney(s.bankCostMinor)}</span>
          <span className="text-xs">
            <Change minor={bankChange.minor} pct={bankChange.pct} format={formatMoney} />
          </span>
          <span className="text-[11px] leading-tight text-muted-foreground">{t.bankCostNote}</span>
        </div>
      </div>

      {ungrouped.length ? (
        <section
          aria-labelledby="kg-ungrouped"
          className="flex flex-col gap-2 rounded-xl border border-dashed border-amber-500/50 bg-amber-500/5 p-4"
        >
          <h2 id="kg-ungrouped" className="flex items-center gap-1.5 font-medium">
            <AlertTriangle className="size-4 text-amber-600" aria-hidden />
            {k.ungrouped}: {formatMoney(s.ungroupedMinor)}
          </h2>
          <p className="text-sm text-muted-foreground">
            {t.ungroupedHelp}{" "}
            <Link href="/kategoriler" className="text-primary hover:underline">
              {t.goCategories}
            </Link>
          </p>
          <ul className="divide-y text-sm">
            {ungrouped.map((r) => (
              <li key={r.id} className="flex justify-between gap-3 py-1.5">
                <span className="min-w-0 truncate">{r.path}</span>
                <span className="tabular-nums">{formatMoney(r.amountMinor)}</span>
              </li>
            ))}
          </ul>
        </section>
      ) : null}

      <div className="grid gap-3 lg:grid-cols-2">
        {KAKEIBO_GROUPS.map((g) => (
          <GroupCard key={g} data={data} group={g} />
        ))}
      </div>

      {bank.length ? (
        <section
          aria-labelledby="kg-bank"
          className={cn("flex flex-col gap-2 rounded-xl border bg-card p-4")}
        >
          <h2 id="kg-bank" className="font-medium">
            {k.bankCost}
          </h2>
          <ul className="divide-y text-sm">
            {bank.map((r) => (
              <li key={r.id} className="flex justify-between gap-3 py-1.5">
                <span className="min-w-0 truncate">{r.path}</span>
                <span className="tabular-nums">{formatMoney(r.amountMinor)}</span>
              </li>
            ))}
          </ul>
        </section>
      ) : null}
    </div>
  );
}