// Caminho: app/manager/usuario/page.tsx (Refatorado)
"use client";

import React, { useEffect, useState, useCallback } from "react";
import ManagerLayout from "@/components/manager-layout";
import Link from "next/link";
import { Button } from "@/components/ui/button";
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select";
import { Plus, Eye, Filter, Loader2 } from "lucide-react";
import { AlertDialog, AlertDialogCancel, AlertDialogContent, AlertDialogDescription, AlertDialogFooter, AlertDialogHeader, AlertDialogTitle } from "@/components/ui/alert-dialog";
import { login } from "services/api"; // Este import parece incorreto, api.ts não exporta login.
import { usuariosService } from "@/services/usuariosApi"; // Alterado
import { perfisService } from "@/services/perfisApi";   // Adicionado

interface FlatUser {
  id: string;
  user_id: string;
  full_name?: string;
  email: string;
  phone?: string | null;
  role: string;
}

interface UserInfoResponse {
  user: any;
  profile: any;
  roles: string[];
  permissions: Record<string, boolean>;
}

export default function UsersPage() {
  const [users, setUsers] = useState<FlatUser[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  const [detailsDialogOpen, setDetailsDialogOpen] = useState(false);
  const [userDetails, setUserDetails] = useState<UserInfoResponse | null>(null);
  const [selectedRole, setSelectedRole] = useState<string>("");

  const fetchUsers = useCallback(async () => {
    setLoading(true);
    setError(null);
    try {
      // 1) Pega papéis e perfis em paralelo para melhor performance
      const [rolesData, profilesData] = await Promise.all([
          usuariosService.listRoles(), // Alterado
          perfisService.list()         // Alterado
      ]);

      const rolesArray = Array.isArray(rolesData) ? rolesData : [];
      const profilesById = new Map<string, any>();
      if (Array.isArray(profilesData)) {
        for (const p of profilesData) {
          if (p?.id) profilesById.set(p.id, p);
        }
      }

      // 3) Mapear roles -> flat users (lógica inalterada)
      const mapped: FlatUser[] = rolesArray.map((roleItem) => {
        const uid = roleItem.user_id;
        const profile = profilesById.get(uid);
        return {
          id: uid,
          user_id: uid,
          full_name: profile?.full_name ?? "—",
          email: profile?.email ?? "—",
          phone: profile?.phone ?? "—",
          role: roleItem.role ?? "—",
        };
      });

      setUsers(mapped);
    } catch (err: any) {
      console.error("Erro ao buscar usuários:", err);
      setError("Não foi possível carregar os usuários. Veja console.");
      setUsers([]);
    } finally {
      setLoading(false);
    }
  }, []);

  useEffect(() => {
    // Lógica de login inicial mantida, embora o import possa precisar de ajuste para 'autenticacaoApi"
    const init = async () => {
      try { await login(); } catch (e) { console.warn("login falhou no init:", e); }
      await fetchUsers();
    };
    init();
  }, [fetchUsers]);

  const openDetailsDialog = async (flatUser: FlatUser) => {
    setDetailsDialogOpen(true);
    setUserDetails(null);
    try {
      const data = await usuariosService.getFullData(flatUser.user_id); // Alterado
      setUserDetails(data);
    } catch (err: any) {
      console.error("Erro ao carregar detalhes:", err);
      setUserDetails({
        user: { id: flatUser.user_id, email: flatUser.email },
        profile: { full_name: flatUser.full_name, phone: flatUser.phone },
        roles: [flatUser.role],
        permissions: {},
      });
    }
  };

  const filteredUsers =
    selectedRole && selectedRole !== "all" ? users.filter((u) => u.role === selectedRole) : users;

  return (
    <ManagerLayout>
        {/* O JSX restante permanece exatamente o mesmo */}
        <div className="space-y-6">
            <div className="flex items-center justify-between">
                <div>
                    <h1 className="text-2xl font-bold text-gray-900">Usuários</h1>
                    <p className="text-sm text-gray-500">Gerencie usuários.</p>
                </div>
                <Link href="/manager/usuario/novo"><Button className="bg-green-600 hover:bg-green-700"><Plus className="w-4 h-4 mr-2" /> Novo Usuário</Button></Link>
            </div>
            <div className="flex items-center space-x-4 bg-white p-4 rounded-lg border border-gray-200">
                <Filter className="w-5 h-5 text-gray-400" />
                <Select onValueChange={setSelectedRole} value={selectedRole}>
                    <SelectTrigger className="w-[180px]"><SelectValue placeholder="Filtrar por papel" /></SelectTrigger>
                    <SelectContent>
                        <SelectItem value="all">Todos</SelectItem>
                        <SelectItem value="admin">Admin</SelectItem>
                        <SelectItem value="gestor">Gestor</SelectItem>
                        <SelectItem value="medico">Médico</SelectItem>
                        <SelectItem value="secretaria">Secretária</SelectItem>
                        <SelectItem value="user">Usuário</SelectItem>
                    </SelectContent>
                </Select>
            </div>
            <div className="bg-white rounded-lg border border-gray-200 shadow-md overflow-hidden">
                {loading ? <div className="p-8 text-center text-gray-500"><Loader2 className="w-8 h-8 animate-spin mx-auto mb-3 text-green-600" />Carregando usuários...</div>
                : error ? <div className="p-8 text-center text-red-600">{error}</div>
                : filteredUsers.length === 0 ? <div className="p-8 text-center text-gray-500">Nenhum usuário encontrado.</div>
                : <div className="overflow-x-auto"><table className="min-w-full divide-y divide-gray-200"><thead className="bg-gray-50"><tr><th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">ID</th><th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">Nome</th><th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">E-mail</th><th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">Telefone</th><th className="px-6 py-3 text-left text-xs font-medium text-gray-500 uppercase">Cargo</th><th className="px-6 py-3 text-right text-xs font-medium text-gray-500 uppercase">Ações</th></tr></thead><tbody className="bg-white divide-y divide-gray-200">{filteredUsers.map((u) => (<tr key={u.id} className="hover:bg-gray-50"><td className="px-6 py-4 text-sm text-gray-500">{u.id}</td><td className="px-6 py-4 text-sm text-gray-900">{u.full_name}</td><td className="px-6 py-4 text-sm text-gray-500">{u.email}</td><td className="px-6 py-4 text-sm text-gray-500">{u.phone}</td><td className="px-6 py-4 text-sm text-gray-500 capitalize">{u.role}</td><td className="px-6 py-4 text-right"><Button variant="outline" size="icon" onClick={() => openDetailsDialog(u)} title="Visualizar"><Eye className="h-4 w-4" /></Button></td></tr>))}</tbody></table></div>}
            </div>
            <AlertDialog open={detailsDialogOpen} onOpenChange={setDetailsDialogOpen}>
                <AlertDialogContent>
                    <AlertDialogHeader>
                        <AlertDialogTitle className="text-2xl">{userDetails?.profile?.full_name || "Detalhes do Usuário"}</AlertDialogTitle>
                        <AlertDialogDescription>
                            {!userDetails ? <div className="p-4 text-center text-gray-500"><Loader2 className="w-6 h-6 animate-spin mx-auto mb-3 text-green-600" />Buscando dados completos...</div>
                            : <div className="space-y-3 pt-2 text-left text-gray-700"><div><strong>ID:</strong> {userDetails.user.id}</div><div><strong>E-mail:</strong> {userDetails.user.email}</div><div><strong>Nome completo:</strong> {userDetails.profile.full_name}</div><div><strong>Telefone:</strong> {userDetails.profile.phone}</div><div><strong>Roles:</strong> {userDetails.roles?.join(", ")}</div><div><strong>Permissões:</strong><ul className="list-disc list-inside">{Object.entries(userDetails.permissions || {}).map(([k,v]) => <li key={k}>{k}: {v ? "Sim" : "Não"}</li>)}</ul></div></div>}
                        </AlertDialogDescription>
                    </AlertDialogHeader>
                    <AlertDialogFooter><AlertDialogCancel>Fechar</AlertDialogCancel></AlertDialogFooter>
                </AlertDialogContent>
            </AlertDialog>
        </div>
    </ManagerLayout>
  );
}