import { useState } from "react";
import { useQuery, useMutation } from "@tanstack/react-query";
import { queryClient, apiRequest } from "@/lib/queryClient";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Badge } from "@/components/ui/badge";
import { Button } from "@/components/ui/button";
import {
  Dialog,
  DialogContent,
  DialogDescription,
  DialogHeader,
  DialogTitle,
  DialogTrigger,
  DialogFooter,
} from "@/components/ui/dialog";
import {
  Form,
  FormControl,
  FormDescription,
  FormField,
  FormItem,
  FormLabel,
  FormMessage,
} from "@/components/ui/form";
import { Input } from "@/components/ui/input";
import { Switch } from "@/components/ui/switch";
import { Server, Plus, Trash2, Edit } from "lucide-react";
import { format } from "date-fns";
import { useForm } from "react-hook-form";
import { zodResolver } from "@hookform/resolvers/zod";
import { insertRouterSchema, type InsertRouter } from "@shared/schema";
import type { Router } from "@shared/schema";
import { useToast } from "@/hooks/use-toast";

export default function Routers() {
  const { toast } = useToast();
  const [addDialogOpen, setAddDialogOpen] = useState(false);
  const [editDialogOpen, setEditDialogOpen] = useState(false);
  const [editingRouter, setEditingRouter] = useState<Router | null>(null);

  const { data: routers, isLoading } = useQuery<Router[]>({
    queryKey: ["/api/routers"],
  });

  const addForm = useForm<InsertRouter>({
    resolver: zodResolver(insertRouterSchema),
    defaultValues: {
      name: "",
      ipAddress: "",
      apiPort: 8729,
      username: "",
      password: "",
      enabled: true,
    },
  });

  const editForm = useForm<InsertRouter>({
    resolver: zodResolver(insertRouterSchema),
  });

  const addMutation = useMutation({
    mutationFn: async (data: InsertRouter) => {
      return await apiRequest("POST", "/api/routers", data);
    },
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ["/api/routers"] });
      toast({
        title: "Router aggiunto",
        description: "Il router è stato configurato con successo",
      });
      setAddDialogOpen(false);
      addForm.reset();
    },
    onError: (error: any) => {
      toast({
        title: "Errore",
        description: error.message || "Impossibile aggiungere il router",
        variant: "destructive",
      });
    },
  });

  const updateMutation = useMutation({
    mutationFn: async ({ id, data }: { id: string; data: InsertRouter }) => {
      return await apiRequest("PUT", `/api/routers/${id}`, data);
    },
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ["/api/routers"] });
      toast({
        title: "Router aggiornato",
        description: "Le modifiche sono state salvate con successo",
      });
      setEditDialogOpen(false);
      setEditingRouter(null);
      editForm.reset();
    },
    onError: (error: any) => {
      toast({
        title: "Errore",
        description: error.message || "Impossibile aggiornare il router",
        variant: "destructive",
      });
    },
  });

  const deleteMutation = useMutation({
    mutationFn: async (id: string) => {
      await apiRequest("DELETE", `/api/routers/${id}`);
    },
    onSuccess: () => {
      queryClient.invalidateQueries({ queryKey: ["/api/routers"] });
      toast({
        title: "Router eliminato",
        description: "Il router è stato rimosso con successo",
      });
    },
    onError: () => {
      toast({
        title: "Errore",
        description: "Impossibile eliminare il router",
        variant: "destructive",
      });
    },
  });

  const handleAddSubmit = (data: InsertRouter) => {
    addMutation.mutate(data);
  };

  const handleEditSubmit = (data: InsertRouter) => {
    if (editingRouter) {
      updateMutation.mutate({ id: editingRouter.id, data });
    }
  };

  const handleEdit = (router: Router) => {
    setEditingRouter(router);
    editForm.reset({
      name: router.name,
      ipAddress: router.ipAddress,
      apiPort: router.apiPort,
      username: router.username,
      password: router.password,
      enabled: router.enabled,
    });
    setEditDialogOpen(true);
  };

  return (
    <div className="flex flex-col gap-6 p-6" data-testid="page-routers">
      <div className="flex items-center justify-between">
        <div>
          <h1 className="text-3xl font-semibold" data-testid="text-page-title">Router MikroTik</h1>
          <p className="text-muted-foreground" data-testid="text-page-subtitle">
            Gestisci i router connessi al sistema IDS
          </p>
        </div>
        
        <Dialog open={addDialogOpen} onOpenChange={setAddDialogOpen}>
          <DialogTrigger asChild>
            <Button data-testid="button-add-router">
              <Plus className="h-4 w-4 mr-2" />
              Aggiungi Router
            </Button>
          </DialogTrigger>
          <DialogContent className="sm:max-w-[500px]" data-testid="dialog-add-router">
            <DialogHeader>
              <DialogTitle>Aggiungi Router MikroTik</DialogTitle>
              <DialogDescription>
                Configura un nuovo router MikroTik per il sistema IDS. Assicurati che l'API RouterOS (porta 8729/8728) sia abilitata.
              </DialogDescription>
            </DialogHeader>
            
            <Form {...addForm}>
              <form onSubmit={addForm.handleSubmit(handleAddSubmit)} className="space-y-4">
                <FormField
                  control={addForm.control}
                  name="name"
                  render={({ field }) => (
                    <FormItem>
                      <FormLabel>Nome Router</FormLabel>
                      <FormControl>
                        <Input placeholder="es. MikroTik Ufficio" {...field} data-testid="input-name" />
                      </FormControl>
                      <FormDescription>
                        Nome descrittivo per identificare il router
                      </FormDescription>
                      <FormMessage />
                    </FormItem>
                  )}
                />

                <FormField
                  control={addForm.control}
                  name="ipAddress"
                  render={({ field }) => (
                    <FormItem>
                      <FormLabel>Indirizzo IP</FormLabel>
                      <FormControl>
                        <Input placeholder="es. 192.168.1.1" {...field} data-testid="input-ip" />
                      </FormControl>
                      <FormDescription>
                        Indirizzo IP o hostname del router
                      </FormDescription>
                      <FormMessage />
                    </FormItem>
                  )}
                />

                <FormField
                  control={addForm.control}
                  name="apiPort"
                  render={({ field }) => (
                    <FormItem>
                      <FormLabel>Porta API</FormLabel>
                      <FormControl>
                        <Input 
                          type="number" 
                          placeholder="8729" 
                          {...field}
                          onChange={(e) => field.onChange(parseInt(e.target.value))}
                          data-testid="input-port"
                        />
                      </FormControl>
                      <FormDescription>
                        Porta RouterOS API MikroTik (8729 per API-SSL, 8728 per API)
                      </FormDescription>
                      <FormMessage />
                    </FormItem>
                  )}
                />

                <FormField
                  control={addForm.control}
                  name="username"
                  render={({ field }) => (
                    <FormItem>
                      <FormLabel>Username</FormLabel>
                      <FormControl>
                        <Input placeholder="admin" {...field} data-testid="input-username" />
                      </FormControl>
                      <FormMessage />
                    </FormItem>
                  )}
                />

                <FormField
                  control={addForm.control}
                  name="password"
                  render={({ field }) => (
                    <FormItem>
                      <FormLabel>Password</FormLabel>
                      <FormControl>
                        <Input type="password" placeholder="••••••••" {...field} data-testid="input-password" />
                      </FormControl>
                      <FormMessage />
                    </FormItem>
                  )}
                />

                <FormField
                  control={addForm.control}
                  name="enabled"
                  render={({ field }) => (
                    <FormItem className="flex flex-row items-center justify-between rounded-lg border p-3">
                      <div className="space-y-0.5">
                        <FormLabel>Abilitato</FormLabel>
                        <FormDescription>
                          Attiva il router per il blocco automatico degli IP
                        </FormDescription>
                      </div>
                      <FormControl>
                        <Switch
                          checked={field.value}
                          onCheckedChange={field.onChange}
                          data-testid="switch-enabled"
                        />
                      </FormControl>
                    </FormItem>
                  )}
                />

                <DialogFooter>
                  <Button
                    type="button"
                    variant="outline"
                    onClick={() => setAddDialogOpen(false)}
                    data-testid="button-cancel"
                  >
                    Annulla
                  </Button>
                  <Button 
                    type="submit" 
                    disabled={addMutation.isPending}
                    data-testid="button-submit"
                  >
                    {addMutation.isPending ? "Salvataggio..." : "Salva Router"}
                  </Button>
                </DialogFooter>
              </form>
            </Form>
          </DialogContent>
        </Dialog>
      </div>

      <Card data-testid="card-routers">
        <CardHeader>
          <CardTitle className="flex items-center gap-2">
            <Server className="h-5 w-5" />
            Router Configurati ({routers?.length || 0})
          </CardTitle>
        </CardHeader>
        <CardContent>
          {isLoading ? (
            <div className="text-center py-8 text-muted-foreground" data-testid="text-loading">
              Caricamento...
            </div>
          ) : routers && routers.length > 0 ? (
            <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-4">
              {routers.map((router) => (
                <div
                  key={router.id}
                  className="p-4 rounded-lg border hover-elevate"
                  data-testid={`router-card-${router.id}`}
                >
                  <div className="flex items-start justify-between mb-3">
                    <div>
                      <h3 className="font-semibold text-lg" data-testid={`text-name-${router.id}`}>
                        {router.name}
                      </h3>
                      <p className="text-sm font-mono text-muted-foreground" data-testid={`text-ip-${router.id}`}>
                        {router.ipAddress}:{router.apiPort}
                      </p>
                    </div>
                    <Badge
                      variant={router.enabled ? "default" : "secondary"}
                      data-testid={`badge-status-${router.id}`}
                    >
                      {router.enabled ? "Attivo" : "Disabilitato"}
                    </Badge>
                  </div>

                  <div className="space-y-2 text-sm">
                    <div className="flex justify-between">
                      <span className="text-muted-foreground">Username:</span>
                      <span className="font-mono" data-testid={`text-username-${router.id}`}>
                        {router.username}
                      </span>
                    </div>
                    <div className="flex justify-between">
                      <span className="text-muted-foreground">Creato:</span>
                      <span data-testid={`text-created-${router.id}`}>
                        {format(new Date(router.createdAt), "dd/MM/yyyy")}
                      </span>
                    </div>
                    {router.lastSync && (
                      <div className="flex justify-between">
                        <span className="text-muted-foreground">Ultima sync:</span>
                        <span data-testid={`text-sync-${router.id}`}>
                          {format(new Date(router.lastSync), "HH:mm:ss")}
                        </span>
                      </div>
                    )}
                  </div>

                  <div className="flex gap-2 mt-4">
                    <Button
                      variant="outline"
                      size="sm"
                      className="flex-1"
                      onClick={() => handleEdit(router)}
                      data-testid={`button-edit-${router.id}`}
                    >
                      <Edit className="h-4 w-4 mr-2" />
                      Modifica
                    </Button>
                    <Button
                      variant="outline"
                      size="sm"
                      onClick={() => deleteMutation.mutate(router.id)}
                      disabled={deleteMutation.isPending}
                      data-testid={`button-delete-${router.id}`}
                    >
                      <Trash2 className="h-4 w-4" />
                    </Button>
                  </div>
                </div>
              ))}
            </div>
          ) : (
            <div className="text-center py-12 text-muted-foreground" data-testid="text-no-routers">
              <Server className="h-12 w-12 mx-auto mb-2 opacity-50" />
              <p className="mb-2">Nessun router configurato</p>
              <p className="text-sm">Aggiungi il primo router per iniziare</p>
            </div>
          )}
        </CardContent>
      </Card>

      <Dialog open={editDialogOpen} onOpenChange={setEditDialogOpen}>
        <DialogContent className="sm:max-w-[500px]" data-testid="dialog-edit-router">
          <DialogHeader>
            <DialogTitle>Modifica Router</DialogTitle>
            <DialogDescription>
              Modifica le impostazioni del router {editingRouter?.name}
            </DialogDescription>
          </DialogHeader>
          
          <Form {...editForm}>
            <form onSubmit={editForm.handleSubmit(handleEditSubmit)} className="space-y-4">
              <FormField
                control={editForm.control}
                name="name"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>Nome Router</FormLabel>
                    <FormControl>
                      <Input placeholder="es. MikroTik Ufficio" {...field} data-testid="input-edit-name" />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />

              <FormField
                control={editForm.control}
                name="ipAddress"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>Indirizzo IP</FormLabel>
                    <FormControl>
                      <Input placeholder="es. 192.168.1.1" {...field} data-testid="input-edit-ip" />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />

              <FormField
                control={editForm.control}
                name="apiPort"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>Porta API</FormLabel>
                    <FormControl>
                      <Input 
                        type="number" 
                        placeholder="8729" 
                        {...field}
                        onChange={(e) => field.onChange(parseInt(e.target.value))}
                        data-testid="input-edit-port"
                      />
                    </FormControl>
                    <FormDescription>
                      Porta RouterOS API MikroTik (8729 per API-SSL, 8728 per API)
                    </FormDescription>
                    <FormMessage />
                  </FormItem>
                )}
              />

              <FormField
                control={editForm.control}
                name="username"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>Username</FormLabel>
                    <FormControl>
                      <Input placeholder="admin" {...field} data-testid="input-edit-username" />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />

              <FormField
                control={editForm.control}
                name="password"
                render={({ field }) => (
                  <FormItem>
                    <FormLabel>Password</FormLabel>
                    <FormControl>
                      <Input type="password" placeholder="••••••••" {...field} data-testid="input-edit-password" />
                    </FormControl>
                    <FormMessage />
                  </FormItem>
                )}
              />

              <FormField
                control={editForm.control}
                name="enabled"
                render={({ field }) => (
                  <FormItem className="flex flex-row items-center justify-between rounded-lg border p-3">
                    <div className="space-y-0.5">
                      <FormLabel>Abilitato</FormLabel>
                      <FormDescription>
                        Attiva il router per il blocco automatico degli IP
                      </FormDescription>
                    </div>
                    <FormControl>
                      <Switch
                        checked={field.value}
                        onCheckedChange={field.onChange}
                        data-testid="switch-edit-enabled"
                      />
                    </FormControl>
                  </FormItem>
                )}
              />

              <DialogFooter>
                <Button
                  type="button"
                  variant="outline"
                  onClick={() => setEditDialogOpen(false)}
                  data-testid="button-edit-cancel"
                >
                  Annulla
                </Button>
                <Button 
                  type="submit" 
                  disabled={updateMutation.isPending}
                  data-testid="button-edit-submit"
                >
                  {updateMutation.isPending ? "Salvataggio..." : "Salva Modifiche"}
                </Button>
              </DialogFooter>
            </form>
          </Form>
        </DialogContent>
      </Dialog>
    </div>
  );
}