"use client";

import {
  Calendar,
  CheckCircle2,
  Clock,
  DollarSign,
  Edit,
  FileCheck,
  FileText,
  Printer,
  Receipt,
  Send,
  Trash2,
  X,
} from "lucide-react";
import { useEffect, useState } from "react";
import { createPortal } from "react-dom";
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import { Card } from "@/components/ui/card";
import { currency, formatDate } from "@/lib/utils";
import { Contract, ContractStatus } from "@/types/contract";

interface ContractDetailModalProps {
  isOpen: boolean;
  onClose: () => void;
  contract: Contract | null;
  onEdit: (contract: Contract) => void;
  onDelete: (id: string) => void;
  onSignContract?: (contractId: string) => void;
}

export function ContractDetailModal({
  isOpen,
  onClose,
  contract,
  onEdit,
  onDelete,
  onSignContract,
}: ContractDetailModalProps) {
  const [mounted, setMounted] = useState(false);

  useEffect(() => {
    setMounted(true);
  }, []);

  if (!isOpen || !contract || !mounted) return null;

  const isSigned = contract.status === "SIGNED";
  const deposit = Number(contract.depositAmount || 0);
  const totalValue = Number(contract.value || 0);
  const remainingValue = Math.max(totalValue - deposit, 0);

  const renderStatusBadge = (status: ContractStatus) => {
    switch (status) {
      case "SIGNED":
        return <Badge tone="green">Assinado & Vigente</Badge>;
      case "PENDING_SIGNATURE":
        return <Badge tone="blue">Aguardando Assinatura</Badge>;
      case "DRAFT":
        return <Badge tone="blue">Minuta (Rascunho)</Badge>;
      case "EXPIRED":
        return <Badge tone="red">Expirado</Badge>;
      case "TERMINATED":
        return <Badge tone="red">Encerrado</Badge>;
      default:
        return <Badge tone="blue">{status}</Badge>;
    }
  };

  const handlePrintContract = () => {
    window.print();
  };

  const handleSendWhatsApp = () => {
    const phone = contract.customer?.phone?.replace(/\D/g, "") || "";
    const msg = encodeURIComponent(
      `Olá ${contract.customer?.name || ""}! Segue a minuta do seu Contrato de Locação *${contract.code}* para conferência e assinatura.\n\nValor Total: ${currency(contract.value)}\nVigência: ${formatDate(contract.startDate)} até ${formatDate(contract.endDate)}`,
    );
    window.open(`https://wa.me/55${phone}?text=${msg}`, "_blank");
  };

  return createPortal(
    <div className="fixed inset-0 z-[9999] flex items-center justify-center bg-black/60 p-4 backdrop-blur-xs transition-all">
      <Card className="w-full max-w-4xl max-h-[90vh] flex flex-col shadow-2xl overflow-hidden p-0">
        {/* Header do Contrato (Fixo no topo) */}
        <div className="flex flex-wrap items-start justify-between gap-4 border-b px-6 py-4 bg-background shrink-0">
          <div className="flex items-center gap-3">
            <div className="rounded-xl border bg-muted/60 p-3">
              <FileCheck className="h-7 w-7 text-primary" />
            </div>
            <div>
              <div className="flex items-center gap-2">
                <h2 className="text-2xl font-bold font-mono">{contract.code}</h2>
                {renderStatusBadge(contract.status)}
              </div>
              <p className="text-base font-semibold text-foreground mt-0.5">
                {contract.title}
              </p>
              <p className="text-xs text-muted-foreground mt-0.5">
                Cliente: <strong>{contract.customer?.name}</strong> ({contract.customer?.document})
              </p>
            </div>
          </div>

          <div className="flex items-center gap-2">
            {!isSigned && onSignContract && (
              <Button
                variant="primary"
                size="sm"
                className="bg-emerald-600 hover:bg-emerald-700 text-white font-semibold"
                onClick={() => {
                  onSignContract(contract.id);
                }}
              >
                <CheckCircle2 className="mr-1.5 h-4 w-4" /> Registrar Assinatura
              </Button>
            )}
            <Button variant="secondary" size="sm" onClick={handleSendWhatsApp} title="Enviar via WhatsApp">
              <Send className="mr-1.5 h-4 w-4 text-emerald-600" /> WhatsApp
            </Button>
            <Button variant="secondary" size="sm" onClick={handlePrintContract} title="Imprimir Minuta em PDF">
              <Printer className="mr-1.5 h-4 w-4" /> PDF / Imprimir
            </Button>
            <Button variant="secondary" size="sm" onClick={() => onEdit(contract)}>
              <Edit className="mr-1.5 h-4 w-4" /> Editar
            </Button>
            <Button
              variant="ghost"
              size="icon"
              className="text-rose-500 hover:bg-rose-500/10 hover:text-rose-600"
              onClick={() => {
                if (confirm(`Tem certeza que deseja excluir o contrato ${contract.code}?`)) {
                  onDelete(contract.id);
                  onClose();
                }
              }}
            >
              <Trash2 className="h-4 w-4" />
            </Button>
            <Button variant="ghost" size="icon" onClick={onClose}>
              <X className="h-5 w-5" />
            </Button>
          </div>
        </div>

        {/* Corpo Rolável */}
        <div className="flex-1 overflow-y-auto px-6 py-5 space-y-6">
          {/* Resumo de Vigência e Valores */}
          <div className="grid gap-4 sm:grid-cols-4">
            <div className="rounded-xl border bg-muted/40 p-4">
              <p className="text-xs font-medium uppercase text-muted-foreground flex items-center gap-1.5">
                <Calendar className="h-4 w-4 text-blue-500" /> Período de Vigência
              </p>
              <p className="mt-2 text-sm font-bold text-foreground">
                {formatDate(contract.startDate)} até {formatDate(contract.endDate)}
              </p>
            </div>

            <div className="rounded-xl border bg-muted/40 p-4">
              <p className="text-xs font-medium uppercase text-muted-foreground flex items-center gap-1.5">
                <FileText className="h-4 w-4 text-purple-500" /> Valor Total Contratado
              </p>
              <p className="mt-2 text-xl font-bold text-primary">
                {currency(totalValue)}
              </p>
            </div>

            <div className="rounded-xl border bg-muted/40 p-4">
              <p className="text-xs font-medium uppercase text-muted-foreground flex items-center gap-1.5">
                <DollarSign className="h-4 w-4 text-emerald-500" /> Sinal Pago / Entrada
              </p>
              <p className="mt-2 text-sm font-bold text-emerald-600 dark:text-emerald-400">
                {currency(deposit)}
              </p>
              <p className="text-[10px] text-muted-foreground">
                {contract.depositPaidAt ? `Pago em ${formatDate(contract.depositPaidAt)}` : "Sem sinal prévio"}
              </p>
            </div>

            <div className="rounded-xl border bg-muted/40 p-4">
              <p className="text-xs font-medium uppercase text-muted-foreground flex items-center gap-1.5">
                <Receipt className="h-4 w-4 text-amber-500" /> Saldo a Parcelar/Pagar
              </p>
              <p className="mt-2 text-sm font-bold text-amber-600 dark:text-amber-400">
                {currency(remainingValue)}
              </p>
            </div>
          </div>

          {/* Histórico Financeiro e Parcelamento (Contas a Receber) */}
          <div className="rounded-xl border bg-card p-5 space-y-3 shadow-2xs">
            <div className="flex items-center justify-between">
              <h3 className="text-sm font-bold uppercase tracking-wider text-foreground flex items-center gap-2">
                <Receipt className="h-4 w-4 text-primary" />
                Histórico Financeiro & Parcelas (Contas a Receber)
              </h3>
              <span className="text-xs text-muted-foreground">
                {(contract.receivables || []).length} lançamentos vinculados
              </span>
            </div>

            {(!contract.receivables || contract.receivables.length === 0) ? (
              <div className="rounded-lg border border-dashed p-4 text-center text-xs text-muted-foreground">
                Nenhum lançamento financeiro registrado para este contrato.
              </div>
            ) : (
              <div className="overflow-x-auto rounded-lg border">
                <table className="w-full text-left text-xs">
                  <thead className="bg-muted/60 text-muted-foreground border-b font-semibold uppercase tracking-wider">
                    <tr>
                      <th className="px-3.5 py-2.5">Descrição do Lançamento</th>
                      <th className="px-3.5 py-2.5">Vencimento</th>
                      <th className="px-3.5 py-2.5">Valor</th>
                      <th className="px-3.5 py-2.5">Status</th>
                      <th className="px-3.5 py-2.5">Data da Baixa</th>
                    </tr>
                  </thead>
                  <tbody className="divide-y">
                    {contract.receivables.map((rec) => {
                      const isPaid = rec.status === "PAID";
                      const isOverdue = rec.status === "OVERDUE";
                      return (
                        <tr key={rec.id} className="hover:bg-muted/30 transition-colors">
                          <td className="px-3.5 py-2.5 font-medium">{rec.description}</td>
                          <td className="px-3.5 py-2.5 text-muted-foreground">{formatDate(rec.dueDate)}</td>
                          <td className="px-3.5 py-2.5 font-bold font-mono">{currency(rec.amount)}</td>
                          <td className="px-3.5 py-2.5">
                            {isPaid ? (
                              <Badge tone="green">PAGO</Badge>
                            ) : isOverdue ? (
                              <Badge tone="red">ATRASADO</Badge>
                            ) : (
                              <Badge tone="blue">PENDENTE</Badge>
                            )}
                          </td>
                          <td className="px-3.5 py-2.5 text-muted-foreground">
                            {rec.paidAt ? (
                              <span className="inline-flex items-center gap-1 text-emerald-600 dark:text-emerald-400 font-semibold">
                                <CheckCircle2 className="h-3 w-3" /> {formatDate(rec.paidAt)}
                              </span>
                            ) : (
                              <span className="inline-flex items-center gap-1 text-muted-foreground">
                                <Clock className="h-3 w-3" /> Aguardando baixa
                              </span>
                            )}
                          </td>
                        </tr>
                      );
                    })}
                  </tbody>
                </table>
              </div>
            )}
          </div>

          {/* Minuta Contratual / Cláusulas Jurídicas */}
          <div>
            <h3 className="mb-2 text-xs font-semibold uppercase tracking-wider text-muted-foreground">
              Termos e Cláusulas Contratuais
            </h3>

            <div className="rounded-xl border bg-muted/20 p-5 text-xs text-foreground font-mono leading-relaxed whitespace-pre-wrap max-h-56 overflow-y-auto">
              {contract.clauses || "Sem cláusulas registradas nesta minuta."}
            </div>
          </div>

          {/* Observações */}
          {contract.notes && (
            <div className="rounded-xl border bg-blue-500/5 p-4 border-blue-500/20">
              <h3 className="text-xs font-semibold uppercase tracking-wider text-blue-600 dark:text-blue-400">
                Observações do Contrato
              </h3>
              <p className="mt-1 text-sm text-foreground/90">{contract.notes}</p>
            </div>
          )}
        </div>

        {/* Rodapé Fixo */}
        <div className="flex justify-end border-t px-6 py-4 bg-background shrink-0">
          <Button variant="secondary" onClick={onClose}>
            Fechar Contrato
          </Button>
        </div>
      </Card>
    </div>,
    document.body,
  );
}