'use client';
import { FunctionComponent, useMemo } from 'react';
import { useLocale, useTranslations } from 'next-intl';
import { Paper, Stack, Typography } from '@mui/material';
import StatusChip, { StatusKind } from '@/components/StatusChip';
import PriceBreakdown from '@/components/PriceBreakdown';
import CountdownTimer from '@/components/CountdownTimer';
import AppButton from '@/components/common/AppButton';
import AppIcon from '@/components/common/AppIcon';
import { formatShamsiDate, parseIrr } from '@/utils';
import type { EarningsState, NurseEarningsItem } from '@/services/payouts/types';

export interface EarningsRowProps {
  item: NurseEarningsItem;
  /** Deep-link to the f8 nurse booking detail (`/nurse/visits/{bookingId}`) — never rebuilt here. */
  onViewBooking: (bookingId: number) => void;
  /** Deep-link to this earning's payout detail (paid rows only). */
  onViewPayout: (payoutId: number) => void;
}

/** Each earnings state maps to a distinct semantic chip so the four states read instantly (§5). */
const EARNINGS_STATE_KIND: Record<EarningsState, StatusKind> = {
  pending: 'pending',
  eligible: 'info',
  paid: 'verified',
  clawback_applied: 'rejected',
};

/**
 * One earnings row — a completed booking's contribution to the nurse's pay. Shows the booking reference,
 * the **three-amount breakdown** framed for the nurse (`gross − commission = your payout`, reconciled by
 * `PriceBreakdown`), the **earnings-state chip**, and the state-specific affordance:
 *  - `pending` → "in escrow · dispute window open" + a **display-only** countdown off `disputeWindowEndsAt`
 *    (the server owns eligibility — this never gates anything, only renders time remaining);
 *  - `eligible` → "cleared · awaiting the next weekly batch";
 *  - `paid` → `paidAt` (Shamsi) + `transferReference`, links to the payout detail;
 *  - `clawback_applied` → the net explanation (`original − clawback = net`) so a lower paid total is explained.
 *
 * Money is display-only IRR digit-strings through the money util (no float, no client computation). Every
 * row deep-links to the booking detail. Read-only: no transfer/retry/eligibility action lives here.
 * @component EarningsRow
 */
const EarningsRow: FunctionComponent<EarningsRowProps> = ({ item, onViewBooking, onViewPayout }) => {
  const t = useTranslations('payouts');
  const locale = useLocale();

  // gross + (−commission) = payout — the invariant PriceBreakdown reconciles against.
  const negativeCommissionIrr = useMemo(
    () => String(-parseIrr(item.balinyaarCommissionIrr)),
    [item.balinyaarCommissionIrr],
  );

  return (
    <Paper
      elevation={0}
      data-earnings-state={item.state}
      sx={{ p: 2.5, border: '1px solid', borderColor: 'divider', borderRadius: 2 }}
    >
      <Stack sx={{ gap: 1.75 }}>
        <Stack
          direction="row"
          sx={{ justifyContent: 'space-between', alignItems: 'flex-start', gap: 1.5, flexWrap: 'wrap' }}
        >
          <Stack sx={{ gap: 0.25, minWidth: 0 }}>
            <Typography variant="subtitle1" sx={{ fontWeight: 700 }}>
              {t('booking_ref', { id: item.bookingId })}
            </Typography>
            <Typography variant="body2" sx={{ color: 'text.secondary' }}>
              {item.patientName} · {formatShamsiDate(item.scheduledDate, locale)}
            </Typography>
          </Stack>
          <StatusChip status={EARNINGS_STATE_KIND[item.state]} label={t(`estate_${item.state}`)} />
        </Stack>

        <PriceBreakdown
          rows={[
            { key: 'gross', label: t('amount_gross'), amountIrr: item.grossPriceIrr },
            { key: 'commission', label: t('amount_commission'), amountIrr: negativeCommissionIrr },
          ]}
          totalLabel={t('amount_your_payout')}
          totalAmountIrr={item.nursePayoutAmount}
        />

        {item.state === 'clawback_applied' && item.clawbackAppliedIrr != null && item.netAmountIrr != null ? (
          <Stack sx={{ gap: 0.75 }}>
            <Typography variant="body2" sx={{ color: 'text.secondary' }}>
              {t('clawback_explainer')}
            </Typography>
            <PriceBreakdown
              rows={[
                { key: 'original', label: t('clawback_original'), amountIrr: item.nursePayoutAmount },
                { key: 'clawback', label: t('clawback_amount'), amountIrr: String(-parseIrr(item.clawbackAppliedIrr)) },
              ]}
              totalLabel={t('clawback_net')}
              totalAmountIrr={item.netAmountIrr}
            />
          </Stack>
        ) : null}

        <StateAffordance item={item} onViewPayout={onViewPayout} />

        <Stack direction="row" sx={{ justifyContent: 'flex-end' }}>
          <AppButton
            variant="text"
            color="primary"
            endIcon="visits"
            onClick={() => onViewBooking(item.bookingId)}
          >
            {t('view_booking')}
          </AppButton>
        </Stack>
      </Stack>
    </Paper>
  );
};

/** The state-specific explanation block below the money breakdown. */
const StateAffordance: FunctionComponent<{
  item: NurseEarningsItem;
  onViewPayout: (payoutId: number) => void;
}> = ({ item, onViewPayout }) => {
  const t = useTranslations('payouts');
  const locale = useLocale();

  if (item.state === 'pending') {
    return (
      <Stack
        direction="row"
        sx={{ gap: 1.5, alignItems: 'center', justifyContent: 'space-between', flexWrap: 'wrap' }}
      >
        <Stack direction="row" sx={{ gap: 0.75, alignItems: 'center' }}>
          <AppIcon icon="lock" size={18} color="var(--bal-warning)" />
          <Typography variant="body2" sx={{ color: 'text.secondary' }}>
            {t('pending_affordance')}
          </Typography>
        </Stack>
        {item.disputeWindowEndsAt ? (
          <CountdownTimer
            deadlineIso={item.disputeWindowEndsAt}
            label={t('dispute_window_label')}
            elapsedText={t('dispute_window_elapsed')}
          />
        ) : null}
      </Stack>
    );
  }

  if (item.state === 'eligible') {
    return (
      <Stack direction="row" sx={{ gap: 0.75, alignItems: 'center' }}>
        <AppIcon icon="schedule" size={18} color="var(--bal-info)" />
        <Typography variant="body2" sx={{ color: 'text.secondary' }}>
          {t('eligible_affordance')}
        </Typography>
      </Stack>
    );
  }

  if (item.state === 'paid') {
    return (
      <Stack sx={{ gap: 0.75 }}>
        <Stack direction="row" sx={{ gap: 0.75, alignItems: 'center', flexWrap: 'wrap' }}>
          <AppIcon icon="verified" size={18} color="var(--bal-success)" />
          <Typography variant="body2" sx={{ color: 'text.secondary' }}>
            {item.paidAt ? t('paid_on', { date: formatShamsiDate(item.paidAt, locale) }) : t('estate_paid')}
          </Typography>
        </Stack>
        {item.transferReference ? (
          <Typography variant="caption" sx={{ color: 'text.secondary' }} dir="ltr">
            {t('transfer_reference_label')}: {item.transferReference}
          </Typography>
        ) : null}
        {item.nursePayoutId != null ? (
          <Stack direction="row" sx={{ justifyContent: 'flex-start' }}>
            <AppButton
              variant="text"
              color="primary"
              endIcon="wallet"
              onClick={() => onViewPayout(item.nursePayoutId as number)}
            >
              {t('view_payout')}
            </AppButton>
          </Stack>
        ) : null}
      </Stack>
    );
  }

  // clawback_applied — the net explanation block above already carries the "why"; nothing more here.
  return null;
};

export default EarningsRow;