import { useMemo, useState } from 'react';
import { Button, Card, Empty, Flex, Modal, Progress, Table, Tag, Tooltip, Typography } from 'antd';
import type { TableColumnsType } from 'antd';
import { FontAwesomeIcon } from '@fortawesome/react-fontawesome';
import { faMapLocationDot, faUserTie } from '@fortawesome/free-solid-svg-icons';
import type { UfFaturamento, UfRep } from '@sar/api-interface';
import brazilMap from '@svg-maps/brazil';

const { Text } = Typography;

function fmt(v: number): string {
  return v.toLocaleString('pt-BR', { style: 'currency', currency: 'BRL' });
}

// R$ compacto para a lista lateral (R$ 12,4 mil / R$ 1,2 mi)
function fmtCompacto(v: number): string {
  if (v >= 1_000_000)
    return `R$ ${(v / 1_000_000).toLocaleString('pt-BR', { maximumFractionDigits: 1 })} mi`;
  if (v >= 1_000)
    return `R$ ${(v / 1_000).toLocaleString('pt-BR', { maximumFractionDigits: 1 })} mil`;
  return fmt(v);
}

// Escala sequencial (um matiz, claro→escuro) derivada do azul JCS.
const SEQ_STEPS = ['#dbe9f6', '#aecde9', '#7BA7D7', '#3d74b8', '#004a99'];
const COR_SEM_VENDA = '#edf0f3';

function corDaUf(valor: number, max: number): string {
  if (valor <= 0 || max <= 0) return COR_SEM_VENDA;
  const idx = Math.min(SEQ_STEPS.length - 1, Math.floor((valor / max) * SEQ_STEPS.length));
  return SEQ_STEPS[idx] ?? COR_SEM_VENDA;
}

const NOME_UF = new Map(brazilMap.locations.map((l) => [l.id.toUpperCase(), l.name]));

const repColumns: TableColumnsType<UfRep> = [
  {
    title: 'Representante',
    key: 'rep',
    render: (_: unknown, r: UfRep) => (
      <Flex align="center" gap={8}>
        <FontAwesomeIcon icon={faUserTie} style={{ color: 'var(--jcs-blue)', opacity: 0.45 }} />
        {r.nomeVendedor ?? `Cód. ${r.codVendedor}`}
      </Flex>
    ),
    ellipsis: true,
  },
  {
    title: 'Pedidos',
    dataIndex: 'pedidos',
    width: 90,
    align: 'right',
    className: 'tabular-nums',
  },
  {
    title: 'Clientes',
    dataIndex: 'clientes',
    width: 90,
    align: 'right',
    className: 'tabular-nums',
  },
  {
    title: 'Faturamento',
    dataIndex: 'faturamento',
    width: 150,
    align: 'right',
    render: (v: number) => fmt(v),
    className: 'tabular-nums',
  },
];

function detalheColumns(): TableColumnsType<UfFaturamento> {
  return [
    {
      title: 'Estado',
      key: 'uf',
      render: (_: unknown, r: UfFaturamento) => (
        <Flex align="center" gap={8}>
          <Tag style={{ margin: 0, fontWeight: 700, width: 40, textAlign: 'center' }}>{r.uf}</Tag>
          <Text>{NOME_UF.get(r.uf) ?? 'Sem UF cadastrada'}</Text>
        </Flex>
      ),
    },
    {
      title: 'Pedidos',
      dataIndex: 'pedidos',
      width: 90,
      align: 'right',
      className: 'tabular-nums',
    },
    {
      title: 'Clientes',
      dataIndex: 'clientes',
      width: 90,
      align: 'right',
      className: 'tabular-nums',
    },
    {
      title: 'Faturamento',
      dataIndex: 'faturamento',
      width: 150,
      align: 'right',
      render: (v: number) => (
        <Text strong className="tabular-nums">
          {fmt(v)}
        </Text>
      ),
    },
    {
      title: 'Participação',
      dataIndex: 'pct',
      width: 170,
      render: (pct: number) => (
        <Flex align="center" gap={8}>
          <Progress
            percent={Math.min(pct, 100)}
            size="small"
            strokeColor="var(--jcs-blue)"
            showInfo={false}
            style={{ flex: 1, minWidth: 60 }}
          />
          <Text className="tabular-nums" style={{ fontSize: 'var(--text-sm)', width: 48 }}>
            {pct.toLocaleString('pt-BR')}%
          </Text>
        </Flex>
      ),
    },
  ];
}

export function MapaBrasilCard({
  dados,
  periodoLabel,
}: {
  dados: UfFaturamento[];
  periodoLabel: string;
}) {
  const [detalheAberto, setDetalheAberto] = useState(false);
  const [ufsExpandidas, setUfsExpandidas] = useState<string[]>([]);
  const [ufHover, setUfHover] = useState<string | null>(null);

  const porUf = useMemo(() => new Map(dados.map((d) => [d.uf, d])), [dados]);
  const max = dados.reduce((m, d) => Math.max(m, d.faturamento), 0);
  const comVenda = dados.filter((d) => d.faturamento > 0 && d.uf !== 'ND');
  const topUfs = comVenda.slice(0, 8);
  const semUf = dados.find((d) => d.uf === 'ND');

  const abrirDetalhe = (uf?: string) => {
    const primeira = comVenda[0]?.uf;
    setUfsExpandidas(uf ? [uf] : primeira ? [primeira] : []);
    setDetalheAberto(true);
  };

  return (
    <Card
      title={
        <Flex align="center" gap={8}>
          <FontAwesomeIcon icon={faMapLocationDot} style={{ color: 'var(--jcs-blue)' }} />
          Faturamento por Estado
        </Flex>
      }
      extra={
        <Button type="primary" ghost size="small" onClick={() => abrirDetalhe()}>
          Detalhar
        </Button>
      }
      style={{ height: '100%' }}
      styles={{ body: { paddingTop: 12 } }}
    >
      {dados.length === 0 ? (
        <Empty description="Nenhuma venda no período." image={Empty.PRESENTED_IMAGE_SIMPLE} />
      ) : (
        <Flex gap={16} wrap="wrap">
          {/* Mapa choropleth */}
          <Flex vertical gap={8} style={{ flex: '1 1 260px', minWidth: 240 }}>
            <svg
              viewBox={brazilMap.viewBox}
              role="img"
              aria-label={`Mapa do Brasil com faturamento por estado — ${periodoLabel}`}
              style={{ width: '100%', height: 'auto', maxHeight: 330 }}
            >
              {brazilMap.locations.map((loc) => {
                const uf = loc.id.toUpperCase();
                const dado = porUf.get(uf);
                const valor = dado?.faturamento ?? 0;
                const hover = ufHover === uf;
                return (
                  <Tooltip
                    key={loc.id}
                    title={
                      <Flex vertical gap={2}>
                        <Text strong style={{ color: '#fff' }}>
                          {loc.name} ({uf})
                        </Text>
                        {dado ? (
                          <>
                            <span>
                              {fmt(valor)} · {dado.pct.toLocaleString('pt-BR')}% do total
                            </span>
                            <span>
                              {dado.pedidos} pedido{dado.pedidos !== 1 ? 's' : ''} · {dado.clientes}{' '}
                              cliente{dado.clientes !== 1 ? 's' : ''}
                            </span>
                          </>
                        ) : (
                          <span>Sem vendas no período</span>
                        )}
                      </Flex>
                    }
                  >
                    <path
                      d={loc.path}
                      fill={corDaUf(valor, max)}
                      stroke={hover ? 'var(--jcs-blue-hover)' : '#fff'}
                      strokeWidth={hover ? 2 : 1}
                      style={{ cursor: dado ? 'pointer' : 'default', transition: 'fill 0.15s' }}
                      onMouseEnter={() => setUfHover(uf)}
                      onMouseLeave={() => setUfHover(null)}
                      onClick={() => dado && abrirDetalhe(uf)}
                    />
                  </Tooltip>
                );
              })}
            </svg>

            {/* Legenda da escala */}
            <Flex align="center" gap={6} style={{ paddingInline: 4 }}>
              <Text type="secondary" style={{ fontSize: 'var(--text-xs)' }}>
                Sem venda
              </Text>
              <span
                style={{
                  width: 14,
                  height: 10,
                  background: COR_SEM_VENDA,
                  border: '1px solid #d9d9d9',
                  borderRadius: 2,
                }}
              />
              <span style={{ width: 8 }} />
              <Text type="secondary" style={{ fontSize: 'var(--text-xs)' }}>
                Menor
              </Text>
              {SEQ_STEPS.map((c) => (
                <span key={c} style={{ width: 14, height: 10, background: c, borderRadius: 2 }} />
              ))}
              <Text type="secondary" style={{ fontSize: 'var(--text-xs)' }}>
                Maior
              </Text>
            </Flex>
          </Flex>

          {/* Ranking de estados */}
          <Flex vertical gap={6} style={{ flex: '1 1 190px', minWidth: 180 }}>
            {topUfs.map((d, i) => (
              <Flex
                key={d.uf}
                align="center"
                gap={8}
                style={{
                  padding: '4px 8px',
                  borderRadius: 6,
                  background: ufHover === d.uf ? 'var(--jcs-blue-light)' : undefined,
                  cursor: 'pointer',
                }}
                onMouseEnter={() => setUfHover(d.uf)}
                onMouseLeave={() => setUfHover(null)}
                onClick={() => abrirDetalhe(d.uf)}
              >
                <Text
                  type="secondary"
                  className="tabular-nums"
                  style={{ width: 16, fontSize: 'var(--text-xs)' }}
                >
                  {i + 1}º
                </Text>
                <span
                  style={{
                    width: 10,
                    height: 10,
                    borderRadius: 2,
                    background: corDaUf(d.faturamento, max),
                    border: '1px solid rgba(0,0,0,0.08)',
                    flexShrink: 0,
                  }}
                />
                <Text strong style={{ width: 28 }}>
                  {d.uf}
                </Text>
                <Text
                  className="tabular-nums"
                  style={{ marginLeft: 'auto', fontSize: 'var(--text-sm)' }}
                >
                  {fmtCompacto(d.faturamento)}
                </Text>
                <Text
                  type="secondary"
                  className="tabular-nums"
                  style={{ width: 44, textAlign: 'right', fontSize: 'var(--text-xs)' }}
                >
                  {d.pct.toLocaleString('pt-BR')}%
                </Text>
              </Flex>
            ))}
            {comVenda.length > topUfs.length && (
              <Text type="secondary" style={{ fontSize: 'var(--text-xs)', paddingInline: 8 }}>
                + {comVenda.length - topUfs.length} outro
                {comVenda.length - topUfs.length !== 1 ? 's' : ''} estado
                {comVenda.length - topUfs.length !== 1 ? 's' : ''} — ver Detalhar
              </Text>
            )}
            {semUf && (
              <Text type="secondary" style={{ fontSize: 'var(--text-xs)', paddingInline: 8 }}>
                {fmtCompacto(semUf.faturamento)} sem UF cadastrada
              </Text>
            )}
          </Flex>
        </Flex>
      )}

      {/* Detalhe por estado → representantes */}
      <Modal
        title={
          <Flex align="center" gap={8}>
            <FontAwesomeIcon icon={faMapLocationDot} style={{ color: 'var(--jcs-blue)' }} />
            Faturamento por Estado &mdash; {periodoLabel}
          </Flex>
        }
        open={detalheAberto}
        onCancel={() => setDetalheAberto(false)}
        footer={null}
        width={900}
        centered
      >
        <Table<UfFaturamento>
          rowKey="uf"
          columns={detalheColumns()}
          dataSource={dados}
          pagination={false}
          size="small"
          scroll={{ y: 420 }}
          expandable={{
            expandedRowKeys: ufsExpandidas,
            onExpandedRowsChange: (keys) => setUfsExpandidas([...keys] as string[]),
            expandedRowRender: (r) => (
              <Table<UfRep>
                rowKey="codVendedor"
                columns={repColumns}
                dataSource={r.reps}
                pagination={false}
                size="small"
              />
            ),
          }}
          locale={{ emptyText: 'Nenhuma venda no período.' }}
        />
      </Modal>
    </Card>
  );
}