import { DollarSign } from 'lucide-react';
import { ContractItemType } from '../../../types/contract-item.types';
import { DELIVERABLE_TYPE_LABELS, DeliverableType } from '../../../constants/deliverable-type';
import type { DeliverableDetail } from '../../../types/deliverable.types';

interface Props {
  deliverable: DeliverableDetail;
}

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

function formatNumber(value: number): string {
  return value.toLocaleString('pt-BR', {
    minimumFractionDigits: 0,
    maximumFractionDigits: 2,
  });
}

function resolveTimebox(deliverable: DeliverableDetail): {
  value: number | null;
  source: 'CONTRACT_ITEM' | 'DELIVERABLE' | null;
} {
  if (deliverable.type === DeliverableType.MANUTENCAO) {
    return { value: deliverable.timeboxManutencao ?? null, source: 'DELIVERABLE' };
  }
  const ci = deliverable.contractItem;
  if (!ci) return { value: null, source: null };
  switch (deliverable.type) {
    case DeliverableType.DESCOBERTA:
      return { value: ci.timeboxDescoberta, source: 'CONTRACT_ITEM' };
    case DeliverableType.DESIGN:
      return { value: ci.timeboxDesign, source: 'CONTRACT_ITEM' };
    case DeliverableType.ARQUITETURA:
      return { value: ci.timeboxArquitetura, source: 'CONTRACT_ITEM' };
    case DeliverableType.CONSTRUCAO:
      return { value: ci.timeboxConstrucao, source: 'CONTRACT_ITEM' };
    default:
      return { value: null, source: null };
  }
}

export function EntregavelValuationCard({ deliverable }: Props) {
  const ci = deliverable.contractItem;
  const isSaas = ci?.itemType === ContractItemType.SAAS_LICENSE;
  const { value: timebox, source } = resolveTimebox(deliverable);

  const totalValueNumber = deliverable.totalValue != null ? Number(deliverable.totalValue) : null;

  if (deliverable.type === DeliverableType.LICENCA) {
    if (totalValueNumber == null || ci?.ustValue == null) {
      return (
        <ValuationWarning
          title="Item de contrato sem valor da UST"
          description="Configure o valor da UST no Item de Contrato vinculado para calcular o valor da licença."
        />
      );
    }
    return (
      <div className="rounded-lg border border-border bg-card p-5">
        <div className="flex items-start gap-3">
          <div className="flex h-10 w-10 items-center justify-center rounded-lg bg-isis-blue/10">
            <DollarSign className="h-5 w-5 text-isis-blue" />
          </div>
          <div className="flex flex-1 flex-col gap-2">
            <div>
              <p className="text-[11px] font-medium uppercase tracking-wider text-text-muted">
                Valor Total
              </p>
              <p className="text-2xl font-bold text-isis-blue">
                {formatCurrency(totalValueNumber)}
              </p>
            </div>
            <p className="text-small text-text-secondary">
              1 licença × R$ {formatNumber(ci.ustValue)}/unidade
            </p>
          </div>
        </div>
      </div>
    );
  }

  if (isSaas) {
    return (
      <div className="rounded-lg border border-border bg-card p-5">
        <div className="flex items-center gap-3">
          <div className="flex h-10 w-10 items-center justify-center rounded-lg bg-warning/10">
            <DollarSign className="h-5 w-5 text-warning" />
          </div>
          <div className="flex flex-1 flex-col gap-1">
            <p className="text-[11px] font-medium uppercase tracking-wider text-text-muted">
              Valor Total
            </p>
            <p className="text-2xl font-bold text-warning">R$ 0,00</p>
            <span className="mt-1 inline-flex w-fit rounded-md bg-warning/20 px-2 py-0.5 text-xs font-medium text-warning">
              Licença SaaS — faturamento via OS Mãe
            </span>
          </div>
        </div>
      </div>
    );
  }

  if (deliverable.type === DeliverableType.MANUTENCAO && deliverable.timeboxManutencao == null) {
    return (
      <ValuationWarning
        title="Time-box de manutenção não informado"
        description="Informe o time-box no formulário de edição do Entregável para calcular o valor."
      />
    );
  }

  if (deliverable.type !== DeliverableType.MANUTENCAO && timebox == null) {
    return (
      <ValuationWarning
        title={`Item de contrato sem time-box configurado para o tipo ${DELIVERABLE_TYPE_LABELS[deliverable.type]}`}
        description="Configure o time-box correspondente no Item de Contrato vinculado."
      />
    );
  }

  if (totalValueNumber == null || timebox == null || ci?.ustValue == null) {
    return (
      <div className="rounded-lg border border-border bg-card p-5">
        <div className="flex items-center gap-3">
          <div className="flex h-10 w-10 items-center justify-center rounded-lg bg-isis-blue/10">
            <DollarSign className="h-5 w-5 text-isis-blue" />
          </div>
          <div>
            <p className="text-[11px] font-medium uppercase tracking-wider text-text-muted">
              Valor Total
            </p>
            <p className="text-body text-text-muted">Não valorado</p>
          </div>
        </div>
      </div>
    );
  }

  return (
    <div className="rounded-lg border border-border bg-card p-5">
      <div className="flex items-start gap-3">
        <div className="flex h-10 w-10 items-center justify-center rounded-lg bg-isis-blue/10">
          <DollarSign className="h-5 w-5 text-isis-blue" />
        </div>
        <div className="flex flex-1 flex-col gap-2">
          <div>
            <p className="text-[11px] font-medium uppercase tracking-wider text-text-muted">
              Valor Total
            </p>
            <p className="text-2xl font-bold text-isis-blue">{formatCurrency(totalValueNumber)}</p>
          </div>
          <p className="text-small text-text-secondary">
            {formatNumber(timebox)}h × {deliverable.numWeeks} sem × R$ {formatNumber(ci.ustValue)}
            /UST
          </p>
          <p className="text-xs text-text-muted">
            Time-box{' '}
            {source === 'DELIVERABLE'
              ? '(definido no Entregável)'
              : '(definido no Item de Contrato)'}
          </p>
        </div>
      </div>
    </div>
  );
}

function ValuationWarning({ title, description }: { title: string; description: string }) {
  return (
    <div className="rounded-lg border border-warning/30 bg-warning/10 p-5">
      <div className="flex items-start gap-3">
        <div className="flex h-10 w-10 items-center justify-center rounded-lg bg-warning/20">
          <DollarSign className="h-5 w-5 text-warning" />
        </div>
        <div>
          <p className="text-body font-medium text-warning">{title}</p>
          <p className="mt-1 text-small text-text-secondary">{description}</p>
        </div>
      </div>
    </div>
  );
}