import { useQuery } from '@tanstack/react-query';
import { useTRPC } from '@barev/web';
import type { Me } from '../App.tsx';
import { useT, type BoKey } from '../i18n.tsx';
import { I, PlanBadge, Skeleton, sourceKeyLabel } from '../components/kit.tsx';

type Pair = { orders: number; subs: number };
const total = (p: Pair) => p.orders + p.subs;

function greetingKey(): BoKey {
  const h = Number(new Intl.DateTimeFormat('en-GB', { hour: 'numeric', hour12: false, timeZone: 'Asia/Yerevan' }).format(new Date()));
  return h < 12 ? 'dash.morning' : h < 18 ? 'dash.day' : 'dash.evening';
}

export function Dashboard({ me }: { me: Me }) {
  const { t } = useT();
  const trpc = useTRPC();
  const attention = useQuery({ ...trpc.bo.dashboard.attention.queryOptions(), refetchInterval: 30_000 });
  const ov = useQuery({ ...trpc.bo.dashboard.overview.queryOptions(), refetchInterval: 60_000 });
  const firstName = me.name.split(' ')[0];

  return (
    <>
      <h1 className="bo-greet">{t(greetingKey(), { name: firstName })}</h1>
      <Attention data={attention.data} />

      {!ov.data ? (
        <div className="bo-grid">
          <div className="bo-span-12">
            <Skeleton h={260} />
          </div>
          <div className="bo-span-6">
            <Skeleton h={220} />
          </div>
          <div className="bo-span-6">
            <Skeleton h={220} />
          </div>
        </div>
      ) : (
        <>
          {ov.data.money && <Money m={ov.data.money} />}
          <div className="bo-grid">
            <Subs s={ov.data.subs} />
            <Growth g={ov.data.growth} />
            {ov.data.team && <TeamBlock team={ov.data.team} />}
            <Feed items={ov.data.feed} wide={!ov.data.team} />
          </div>
        </>
      )}
    </>
  );
}

// ───── требует внимания ─────

type Att = { unassigned: number; unreadChats: number; webRequests: number; leads: number; appRequests: number; lowRatings: number; expiring: number };
const ATT: { key: keyof Att; href: string; urgent?: boolean; fill: string; ink: string }[] = [
  { key: 'unassigned', href: '#/orders?group=new', urgent: true, fill: 'var(--bc-accent)', ink: '#fff' },
  { key: 'unreadChats', href: '#/chats', urgent: true, fill: 'var(--bc-accent)', ink: '#fff' },
  { key: 'webRequests', href: '#/requests', fill: 'var(--bc-blue)', ink: 'var(--bc-blue-ink)' },
  { key: 'leads', href: '#/moves', fill: 'var(--bc-docs)', ink: 'var(--bc-docs-ink)' },
  { key: 'appRequests', href: '#/requests', fill: 'var(--bc-learn)', ink: 'var(--bc-learn-ink)' },
  { key: 'lowRatings', href: '#/providers', fill: 'var(--bc-pink)', ink: 'var(--bc-plum)' },
  { key: 'expiring', href: '#/clients?expiring=7', fill: 'var(--bc-perks)', ink: 'var(--bc-perks-ink)' },
];

function Attention({ data }: { data?: Att }) {
  const { t } = useT();
  if (!data) return <div className="bo-attn" style={{ minHeight: 58 }} />;
  const items = ATT.filter((a) => data[a.key] > 0);
  return (
    <section className="bo-attn" aria-label={t('dash.attention')}>
      {items.length === 0 ? (
        <span className="bo-attn__ok">
          <I name="check" size={18} />
          {t('dash.allClear')}
        </span>
      ) : (
        items.map((a) => {
          const external = a.href.startsWith('http');
          return (
            <a key={a.key} className="bo-attn__item" href={a.href} {...(external ? { target: '_blank', rel: 'noreferrer' } : {})}>
              <span className="bo-attn__n" style={{ background: a.fill, color: a.ink }}>
                {data[a.key]}
              </span>
              {t(`att.${a.key}`)}
            </a>
          );
        })
      )}
    </section>
  );
}

// ───── деньги ─────

function Delta({ cur, prev, label }: { cur: number; prev: number; label: string }) {
  if (prev <= 0) return null;
  const pct = Math.round(((cur - prev) / prev) * 100);
  const up = pct >= 0;
  return (
    <span className={`bo-delta bo-delta--${up ? 'up' : 'down'}`} title={label}>
      <I name={up ? 'arrowUp' : 'arrowDown'} size={13} stroke={2.4} />
      {Math.abs(pct)}%
    </span>
  );
}

function Money({ m }: { m: { today: Pair; yesterday: Pair; week: Pair; prevWeek: Pair; month: Pair; prevMonth: Pair; series: ({ day: string } & Pair)[] } }) {
  const { t, amd, amdShort, locale } = useT();
  const periods = [
    { label: t('dash.today'), cur: m.today, prev: m.yesterday, extra: t('dash.vsYesterday', { sum: amd(total(m.yesterday)) }) },
    { label: t('dash.week'), cur: m.week, prev: m.prevWeek, extra: t('dash.vsPrev', { period: t('dash.week') }) },
    { label: t('dash.month'), cur: m.month, prev: m.prevMonth, extra: t('dash.vsPrev', { period: t('dash.month') }) },
  ];
  const max = Math.max(1, ...m.series.map(total));
  const dayFmt = new Intl.DateTimeFormat(locale === 'en' ? 'en-GB' : locale === 'hy' ? 'hy-AM' : 'ru-RU', { day: 'numeric', month: 'short' });
  const ORDERS = 'var(--bc-pink)';
  const SUBS = 'var(--bc-perks)';
  return (
    <section className="bo-money" aria-label={t('dash.money')}>
      <div className="bo-money__periods">
        {periods.map((p) => (
          <div key={p.label}>
            <div className="bo-money__label">{p.label}</div>
            <div className="bo-money__sum">{amd(total(p.cur))}</div>
            <div className="bo-money__split">
              <Delta cur={total(p.cur)} prev={total(p.prev)} label={p.extra} />
              <span>
                {t('dash.orders')} {amdShort(p.cur.orders)}
              </span>
              <span>
                {t('dash.subs')} {amdShort(p.cur.subs)}
              </span>
            </div>
          </div>
        ))}
      </div>
      <div className="bo-chart">
        <div className="bo-chart__bars" role="img" aria-label={t('dash.chart')}>
          {m.series.map((d) => {
            const date = dayFmt.format(new Date(`${d.day}T12:00:00+04:00`));
            return (
              <div key={d.day} className="bo-chart__day" data-tip={`${date}: ${amd(total(d))}`}>
                <span className="bo-chart__base" />
                {d.orders > 0 && <span style={{ height: `${(d.orders / max) * 100}%`, background: ORDERS }} />}
                {d.subs > 0 && <span style={{ height: `${(d.subs / max) * 100}%`, background: SUBS }} />}
              </div>
            );
          })}
        </div>
        <div className="bo-chart__legend">
          <span>{t('dash.chart')}</span>
          <span style={{ display: 'flex', gap: 14 }}>
            <span className="bo-key" style={{ ['--key' as string]: ORDERS }}>
              {t('dash.orders')}
            </span>
            <span className="bo-key" style={{ ['--key' as string]: SUBS }}>
              {t('dash.subs')}
            </span>
          </span>
        </div>
      </div>
    </section>
  );
}

// ───── подписки ─────

interface SubsData {
  plus: number;
  elite: number;
  gifts: number;
  expiring: { clientId: string; name: string; plan: 'BAREV_PLUS' | 'ELITE'; endsAt: Date; source: string }[];
  giftClients: number;
  giftConverted: number;
}

function Subs({ s }: { s: SubsData }) {
  const { t, date } = useT();
  const conv = s.giftClients ? Math.round((s.giftConverted / s.giftClients) * 100) : 0;
  return (
    <section className="bo-panel bo-span-7">
      <div className="bo-panel__head">
        <h2 className="bo-h2">{t('dash.subsTitle')}</h2>
        <a className="bo-small bo-muted" href="#/clients?plan=any">
          {t('nav.clients')}
        </a>
      </div>
      <div className="bo-pair" style={{ marginBottom: 6 }}>
        <div>
          <PlanBadge plan="BAREV_PLUS" t={t} />
          <div className="bo-bignum" style={{ marginTop: 8 }}>
            {s.plus}
          </div>
        </div>
        <div>
          <PlanBadge plan="ELITE" t={t} />
          <div className="bo-bignum" style={{ marginTop: 8 }}>
            {s.elite}
          </div>
        </div>
        <div>
          <span className="bo-label">{t('dash.conversion')}</span>
          <div className="bo-bignum" style={{ marginTop: 8 }}>
            {conv}%
          </div>
        </div>
      </div>
      <p className="bo-hint" style={{ marginBottom: 18 }}>
        {t('dash.gifts', { n: s.gifts })}. {t('dash.conversionHint', { paid: s.giftConverted, total: s.giftClients })}.
      </p>
      <h3 className="bo-h3" style={{ marginBottom: 4 }}>
        {t('dash.expiring')}
      </h3>
      {s.expiring.length === 0 ? (
        <p className="bo-hint">{t('dash.noExpiring')}</p>
      ) : (
        <ul className="bo-list">
          {s.expiring.map((e) => (
            <li key={e.clientId + e.plan}>
              <PlanBadge plan={e.plan} t={t} />
              <a className="bo-grow" href={`#/clients/${e.clientId}`}>
                {e.name}
              </a>
              <span className="bo-small bo-muted">{date(e.endsAt)}</span>
            </li>
          ))}
        </ul>
      )}
    </section>
  );
}

// ───── рост ─────

interface GrowthData {
  today: number;
  week: number;
  month: number;
  prevMonth: number;
  sources: { key: string; count: number }[];
  funnel: { leads: number; clients: number; paying: number };
}

function Growth({ g }: { g: GrowthData }) {
  const { t } = useT();
  const maxSrc = Math.max(1, ...g.sources.map((s) => s.count));
  const steps = [
    { key: 'funnel.leads' as const, n: g.funnel.leads, fill: 'var(--bc-blue)', ink: 'var(--bc-blue-ink)' },
    { key: 'funnel.clients' as const, n: g.funnel.clients, fill: 'var(--bc-learn)', ink: 'var(--bc-learn-ink)' },
    { key: 'funnel.paying' as const, n: g.funnel.paying, fill: 'var(--bc-home)', ink: 'var(--bc-home-ink)' },
  ];
  const maxStep = Math.max(1, ...steps.map((s) => s.n));
  return (
    <section className="bo-panel bo-span-5">
      <div className="bo-panel__head">
        <h2 className="bo-h2">{t('dash.growth')}</h2>
      </div>
      <span className="bo-label">{t('dash.newClients')}</span>
      <div className="bo-pair" style={{ margin: '6px 0 4px', alignItems: 'baseline' }}>
        <span>
          <span className="bo-bignum">{g.month}</span> <span className="bo-muted bo-small">{t('dash.month')}</span>
        </span>
        <span>
          <b className="bo-num" style={{ fontSize: 22 }}>
            {g.week}
          </b>{' '}
          <span className="bo-muted bo-small">{t('dash.week')}</span>
        </span>
        <span>
          <b className="bo-num" style={{ fontSize: 22 }}>
            {g.today}
          </b>{' '}
          <span className="bo-muted bo-small">{t('dash.today')}</span>
        </span>
      </div>
      <p className="bo-hint" style={{ marginBottom: 16 }}>
        {t('dash.prevMonth', { n: g.prevMonth })}
      </p>

      <h3 className="bo-h3" style={{ marginBottom: 6 }}>
        {t('dash.sources')}
      </h3>
      {g.sources.length === 0 ? (
        <p className="bo-hint">{t('dash.empty')}</p>
      ) : (
        g.sources.slice(0, 5).map((s) => (
          <div key={s.key} className="bo-bar">
            <span className="bo-grow bo-small">{sourceKeyLabel(t, s.key)}</span>
            <b className="bo-num bo-small">{s.count}</b>
            <div className="bo-bar__track">
              <div className="bo-bar__fill" style={{ width: `${(s.count / maxSrc) * 100}%` }} />
            </div>
          </div>
        ))
      )}

      <h3 className="bo-h3" style={{ margin: '18px 0 8px' }}>
        {t('dash.funnel')}
      </h3>
      <div className="bo-funnel">
        {steps.map((s) => (
          <div key={s.key} className="bo-funnel__step" style={{ ['--fill' as string]: s.fill, ['--ink' as string]: s.ink, width: `${Math.max(48, (s.n / maxStep) * 100)}%` }}>
            <span>{t(s.key)}</span>
            <b className="bo-num">{s.n}</b>
          </div>
        ))}
      </div>
    </section>
  );
}

// ───── команда ─────

interface TeamData {
  topProviders: { id: string; name: string; avg: number; count: number }[];
  bottomProviders: { id: string; name: string; avg: number; count: number }[];
  topPartners: { id: string; name: string; scans: number }[];
}

function TeamBlock({ team }: { team: TeamData }) {
  const { t } = useT();
  const prov = (p: TeamData['topProviders'][number]) => (
    <li key={p.id}>
      <span className="bo-grow">{p.name}</span>
      <span className="bo-small bo-muted">{t('dash.ratings', { n: p.count })}</span>
      <b className="bo-num">★ {p.avg.toFixed(1)}</b>
    </li>
  );
  return (
    <section className="bo-panel bo-span-5">
      <div className="bo-panel__head">
        <h2 className="bo-h2">{t('dash.team')}</h2>
      </div>
      <h3 className="bo-h3">{t('dash.topProviders')}</h3>
      {team.topProviders.length ? <ul className="bo-list">{team.topProviders.map(prov)}</ul> : <p className="bo-hint">{t('dash.empty')}</p>}
      {team.bottomProviders.length > 0 && (
        <>
          <h3 className="bo-h3" style={{ marginTop: 14 }}>
            {t('dash.bottomProviders')}
          </h3>
          <ul className="bo-list">{team.bottomProviders.map(prov)}</ul>
        </>
      )}
      <h3 className="bo-h3" style={{ marginTop: 14 }}>
        {t('dash.topPartners')}
      </h3>
      {team.topPartners.length ? (
        <ul className="bo-list">
          {team.topPartners.map((p) => (
            <li key={p.id}>
              <span className="bo-grow">{p.name}</span>
              <span className="bo-small bo-muted">{t('dash.scans', { n: p.scans })}</span>
            </li>
          ))}
        </ul>
      ) : (
        <p className="bo-hint">{t('dash.empty')}</p>
      )}
      <p className="bo-hint" style={{ marginTop: 14 }}>
        {t('dash.salesSoon')}
      </p>
    </section>
  );
}

// ───── лента ─────

type FeedItem =
  | { kind: 'subscription'; at: Date; clientId: string; who: string; plan: 'BAREV_PLUS' | 'ELITE'; source: string; amount: number | null }
  | { kind: 'payment'; at: Date; clientId: string; who: string; service: string; number: number; amount: number | null }
  | { kind: 'action'; at: Date; by: string | null; action: string; entityId: string | null };

function Feed({ items, wide }: { items: FeedItem[]; wide: boolean }) {
  const { t, dateTime, amd, shared } = useT();
  return (
    <section className={`bo-panel ${wide ? 'bo-span-12' : 'bo-span-7'}`}>
      <div className="bo-panel__head">
        <h2 className="bo-h2">{t('dash.feed')}</h2>
      </div>
      {items.length === 0 ? (
        <p className="bo-hint">{t('dash.empty')}</p>
      ) : (
        <ul className="bo-list">
          {items.map((f, i) => (
            <li key={i}>
              <span className="bo-feed__time">{dateTime(f.at)}</span>
              {f.kind === 'subscription' && (
                <>
                  <PlanBadge plan={f.plan} t={t} />
                  <span className="bo-grow">
                    <a href={`#/clients/${f.clientId}`}>{f.who}</a> <span className="bo-muted">· {t(`subSource.${f.source}`)}</span>
                  </span>
                  {f.amount != null && <b className="bo-num">{amd(f.amount)}</b>}
                </>
              )}
              {f.kind === 'payment' && (
                <>
                  <span className="bo-grow">
                    <a href={`#/clients/${f.clientId}`}>{f.who}</a> <span className="bo-muted">· {shared(`services.${f.service}.name`)} · {t('feed.payment', { number: f.number })}</span>
                  </span>
                  {f.amount != null && <b className="bo-num">{amd(f.amount)}</b>}
                </>
              )}
              {f.kind === 'action' && (
                <span className="bo-grow bo-muted">
                  <b style={{ color: 'var(--bc-ink)' }}>{f.by ?? '—'}</b> {actionLabel(t, f.action)}
                </span>
              )}
            </li>
          ))}
        </ul>
      )}
    </section>
  );
}

export function actionLabel(t: ReturnType<typeof useT>['t'], action: string) {
  const key = `audit.${action}`;
  const tr = t(key);
  return tr === key ? action : tr;
}