import { useState, useEffect, useRef, useCallback } from "react";
import DashboardLayout from "@/components/DashboardLayout";
import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Textarea } from "@/components/ui/textarea";
import { Switch } from "@/components/ui/switch";
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
import { Badge } from "@/components/ui/badge";
import { trpc } from "@/lib/trpc";
import { 
  Loader2, 
  Save, 
  CheckCircle, 
  Brain, 
  Key, 
  Server, 
  FileCheck,
  AlertCircle,
  Sparkles,
  PenLine,
  Plus,
  Trash2,
  Upload,
  User
} from "lucide-react";
// useRef, useCallback already imported above
import { toast } from "sonner";
import { Checkbox } from "@/components/ui/checkbox";
import { Table, TableBody, TableCell, TableHead, TableHeader, TableRow } from "@/components/ui/table";

function SignaturesSection() {
  const utils = trpc.useUtils();
  const { data: signatures, isLoading } = trpc.signatures.list.useQuery();
  
  const [firstName, setFirstName] = useState("");
  const [lastName, setLastName] = useState("");
  const [mode, setMode] = useState<"file" | "draw">("draw");
  const [previewUrl, setPreviewUrl] = useState<string | null>(null);
  const [fileData, setFileData] = useState<string | null>(null);
  const [fileName, setFileName] = useState("");
  const [mimeType, setMimeType] = useState("image/png");
  const fileInputRef = useRef<HTMLInputElement>(null);
  const canvasRef = useRef<HTMLCanvasElement>(null);
  const isDrawingRef = useRef(false);
  const lastPosRef = useRef<{ x: number; y: number } | null>(null);

  // Initialize canvas
  useEffect(() => {
    if (mode !== "draw") return;
    const canvas = canvasRef.current;
    if (!canvas) return;
    const ctx = canvas.getContext("2d");
    if (!ctx) return;
    ctx.fillStyle = "#ffffff";
    ctx.fillRect(0, 0, canvas.width, canvas.height);
    ctx.strokeStyle = "#1e293b";
    ctx.lineWidth = 2;
    ctx.lineCap = "round";
    ctx.lineJoin = "round";
  }, [mode]);

  const getPos = useCallback((e: React.MouseEvent<HTMLCanvasElement> | React.TouchEvent<HTMLCanvasElement>, canvas: HTMLCanvasElement) => {
    const rect = canvas.getBoundingClientRect();
    const scaleX = canvas.width / rect.width;
    const scaleY = canvas.height / rect.height;
    if ("touches" in e) {
      const touch = e.touches[0];
      return { x: (touch.clientX - rect.left) * scaleX, y: (touch.clientY - rect.top) * scaleY };
    }
    return { x: (e.clientX - rect.left) * scaleX, y: (e.clientY - rect.top) * scaleY };
  }, []);

  const startDrawing = useCallback((e: React.MouseEvent<HTMLCanvasElement> | React.TouchEvent<HTMLCanvasElement>) => {
    e.preventDefault();
    const canvas = canvasRef.current;
    if (!canvas) return;
    isDrawingRef.current = true;
    lastPosRef.current = getPos(e, canvas);
  }, [getPos]);

  const draw = useCallback((e: React.MouseEvent<HTMLCanvasElement> | React.TouchEvent<HTMLCanvasElement>) => {
    e.preventDefault();
    if (!isDrawingRef.current) return;
    const canvas = canvasRef.current;
    if (!canvas) return;
    const ctx = canvas.getContext("2d");
    if (!ctx || !lastPosRef.current) return;
    const pos = getPos(e, canvas);
    ctx.beginPath();
    ctx.moveTo(lastPosRef.current.x, lastPosRef.current.y);
    ctx.lineTo(pos.x, pos.y);
    ctx.stroke();
    lastPosRef.current = pos;
  }, [getPos]);

  const stopDrawing = useCallback(() => {
    isDrawingRef.current = false;
    lastPosRef.current = null;
  }, []);

  const clearCanvas = useCallback(() => {
    const canvas = canvasRef.current;
    if (!canvas) return;
    const ctx = canvas.getContext("2d");
    if (!ctx) return;
    ctx.fillStyle = "#ffffff";
    ctx.fillRect(0, 0, canvas.width, canvas.height);
    setFileData(null);
    setPreviewUrl(null);
  }, []);

  const captureCanvas = useCallback(() => {
    const canvas = canvasRef.current;
    if (!canvas) return;
    const dataUrl = canvas.toDataURL("image/png");
    const base64 = dataUrl.split(",")[1];
    setFileData(base64);
    setPreviewUrl(dataUrl);
    setFileName("signature-dessinee.png");
    setMimeType("image/png");
  }, []);

  const uploadMutation = trpc.signatures.upload.useMutation({
    onSuccess: () => {
      toast.success("Signature ajoutée avec succès !");
      utils.signatures.list.invalidate();
      setFirstName("");
      setLastName("");
      setPreviewUrl(null);
      setFileData(null);
      setFileName("");
    },
    onError: (error) => {
      toast.error(error.message || "Erreur lors de l'ajout de la signature");
    },
  });

  const deleteMutation = trpc.signatures.delete.useMutation({
    onSuccess: () => {
      toast.success("Signature supprimée");
      utils.signatures.list.invalidate();
    },
    onError: (error) => {
      toast.error(error.message || "Erreur lors de la suppression");
    },
  });

  const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
    const file = e.target.files?.[0];
    if (!file) return;
    if (!file.type.startsWith("image/")) {
      toast.error("Veuillez sélectionner une image (PNG, JPG, GIF...)");
      return;
    }
    if (file.size > 2 * 1024 * 1024) {
      toast.error("L'image ne doit pas dépasser 2 Mo");
      return;
    }
    setFileName(file.name);
    setMimeType(file.type);
    const reader = new FileReader();
    reader.onload = (ev) => {
      const result = ev.target?.result as string;
      // result is "data:image/png;base64,XXXX"
      const base64 = result.split(",")[1];
      setFileData(base64);
      setPreviewUrl(result);
    };
    reader.readAsDataURL(file);
  };

  const handleAdd = () => {
    if (!firstName.trim() || !lastName.trim()) {
      toast.error("Veuillez renseigner le prénom et le nom");
      return;
    }
    // In draw mode, capture canvas first
    let finalFileData = fileData;
    let finalFileName = fileName;
    let finalMimeType = mimeType;
    if (mode === "draw") {
      const canvas = canvasRef.current;
      if (!canvas) { toast.error("Erreur canvas"); return; }
      const dataUrl = canvas.toDataURL("image/png");
      finalFileData = dataUrl.split(",")[1];
      finalFileName = "signature-dessinee.png";
      finalMimeType = "image/png";
    }
    if (!finalFileData) {
      toast.error(mode === "draw" ? "Veuillez dessiner votre signature" : "Veuillez sélectionner une image de signature");
      return;
    }
    uploadMutation.mutate({ firstName: firstName.trim(), lastName: lastName.trim(), fileName: finalFileName, fileData: finalFileData, mimeType: finalMimeType });
  };

  return (
    <div className="space-y-6">
      {/* Header */}
      <Card className="border-2 hover:border-primary/50 transition-colors">
        <CardHeader className="bg-gradient-to-r from-emerald-50 to-teal-50 dark:from-emerald-950/20 dark:to-teal-950/20 border-b">
          <div className="flex items-center gap-3">
            <div className="p-2 bg-emerald-500 rounded-lg">
              <PenLine className="w-6 h-6 text-white" />
            </div>
            <div>
              <CardTitle className="text-xl">Gestion des signatures</CardTitle>
              <CardDescription className="mt-1">
                Ajoutez les signatures des responsables pour les documents officiels
              </CardDescription>
            </div>
          </div>
        </CardHeader>
        <CardContent className="space-y-6 pt-6">
          {/* Add form */}
          <div className="p-4 bg-muted/30 rounded-lg border border-dashed border-muted-foreground/30 space-y-4">
            <p className="text-sm font-semibold text-muted-foreground uppercase tracking-wide">Ajouter une signature</p>

            {/* Nom / Prénom */}
            <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
              <div className="space-y-2">
                <Label htmlFor="sig-firstname" className="font-medium">Prénom</Label>
                <Input
                  id="sig-firstname"
                  value={firstName}
                  onChange={(e) => setFirstName(e.target.value)}
                  placeholder="Ex : Jean"
                  className="h-10"
                />
              </div>
              <div className="space-y-2">
                <Label htmlFor="sig-lastname" className="font-medium">Nom</Label>
                <Input
                  id="sig-lastname"
                  value={lastName}
                  onChange={(e) => setLastName(e.target.value)}
                  placeholder="Ex : Dupont"
                  className="h-10"
                />
              </div>
            </div>

            {/* Mode selector */}
            <div className="flex gap-2">
              <Button
                type="button"
                variant={mode === "draw" ? "default" : "outline"}
                size="sm"
                className={mode === "draw" ? "bg-emerald-600 hover:bg-emerald-700 text-white" : ""}
                onClick={() => { setMode("draw"); setPreviewUrl(null); setFileData(null); setFileName(""); }}
              >
                <PenLine className="w-4 h-4 mr-1" /> Dessiner
              </Button>
              <Button
                type="button"
                variant={mode === "file" ? "default" : "outline"}
                size="sm"
                className={mode === "file" ? "bg-emerald-600 hover:bg-emerald-700 text-white" : ""}
                onClick={() => { setMode("file"); setPreviewUrl(null); setFileData(null); setFileName(""); clearCanvas(); }}
              >
                <Upload className="w-4 h-4 mr-1" /> Importer un fichier
              </Button>
            </div>

            {/* Draw mode */}
            {mode === "draw" && (
              <div className="space-y-2">
                <Label className="font-medium">Dessinez votre signature ci-dessous</Label>
                <div className="relative rounded-lg border-2 border-slate-300 bg-white overflow-hidden" style={{ touchAction: "none" }}>
                  <canvas
                    ref={canvasRef}
                    width={600}
                    height={180}
                    className="w-full cursor-crosshair block"
                    style={{ touchAction: "none" }}
                    onMouseDown={startDrawing}
                    onMouseMove={draw}
                    onMouseUp={stopDrawing}
                    onMouseLeave={stopDrawing}
                    onTouchStart={startDrawing}
                    onTouchMove={draw}
                    onTouchEnd={stopDrawing}
                  />
                  <div className="absolute bottom-1 right-2 text-xs text-slate-400 pointer-events-none select-none">
                    Signez ici
                  </div>
                </div>
                <Button
                  type="button"
                  variant="outline"
                  size="sm"
                  onClick={clearCanvas}
                  className="text-muted-foreground"
                >
                  <Trash2 className="w-3.5 h-3.5 mr-1" /> Effacer
                </Button>
              </div>
            )}

            {/* File mode */}
            {mode === "file" && (
              <div className="space-y-2">
                <Label className="font-medium">Image de la signature</Label>
                <div
                  className="flex items-center gap-4 p-3 border-2 border-dashed rounded-lg cursor-pointer hover:border-primary/50 transition-colors"
                  onClick={() => fileInputRef.current?.click()}
                >
                  {previewUrl ? (
                    <img src={previewUrl} alt="Aperçu signature" className="h-16 max-w-[200px] object-contain rounded border bg-white p-1" />
                  ) : (
                    <div className="flex flex-col items-center justify-center w-full py-4 text-muted-foreground gap-2">
                      <Upload className="w-8 h-8" />
                      <span className="text-sm">Cliquez pour sélectionner une image (PNG, JPG, GIF...)</span>
                      <span className="text-xs">Taille max : 2 Mo</span>
                    </div>
                  )}
                  <input
                    ref={fileInputRef}
                    type="file"
                    accept="image/*"
                    className="hidden"
                    onChange={handleFileChange}
                  />
                </div>
                {previewUrl && (
                  <Button variant="ghost" size="sm" className="text-muted-foreground" onClick={() => { setPreviewUrl(null); setFileData(null); setFileName(""); if (fileInputRef.current) fileInputRef.current.value = ""; }}>
                    Changer l'image
                  </Button>
                )}
              </div>
            )}

            <Button
              onClick={handleAdd}
              disabled={uploadMutation.isPending || !firstName || !lastName}
              className="w-full h-10 bg-emerald-600 hover:bg-emerald-700 text-white gap-2"
            >
              {uploadMutation.isPending ? (
                <><Loader2 className="w-4 h-4 animate-spin" /> Enregistrement...</>
              ) : (
                <><Plus className="w-4 h-4" /> Ajouter la signature</>
              )}
            </Button>
          </div>

          {/* Signatures list */}
          {isLoading ? (
            <div className="flex items-center justify-center py-8">
              <Loader2 className="w-6 h-6 animate-spin text-primary" />
            </div>
          ) : !signatures || signatures.length === 0 ? (
            <div className="flex flex-col items-center justify-center py-10 text-muted-foreground gap-3">
              <PenLine className="w-10 h-10 opacity-30" />
              <p className="text-sm">Aucune signature enregistrée</p>
            </div>
          ) : (
            <div className="space-y-3">
              <p className="text-sm font-semibold text-muted-foreground uppercase tracking-wide">
                {signatures.length} signature{signatures.length > 1 ? "s" : ""} enregistrée{signatures.length > 1 ? "s" : ""}
              </p>
              <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4">
                {signatures.map((sig) => (
                  <div
                    key={sig.id}
                    className="group relative flex flex-col items-center gap-3 p-4 rounded-xl border-2 border-border hover:border-emerald-300 bg-card transition-all shadow-sm hover:shadow-md"
                  >
                    {/* Signature image */}
                    <div className="w-full h-24 flex items-center justify-center bg-white rounded-lg border overflow-hidden p-2">
                      <img
                        src={sig.imageUrl}
                        alt={`Signature de ${sig.firstName} ${sig.lastName}`}
                        className="max-h-full max-w-full object-contain"
                        onError={(e) => { (e.target as HTMLImageElement).src = ""; }}
                      />
                    </div>
                    {/* Name */}
                    <div className="flex items-center gap-2 text-center">
                      <div className="p-1.5 bg-emerald-100 dark:bg-emerald-900/30 rounded-full">
                        <User className="w-4 h-4 text-emerald-600" />
                      </div>
                      <span className="font-semibold text-sm">{sig.firstName} {sig.lastName}</span>
                    </div>
                    {/* Date */}
                    <p className="text-xs text-muted-foreground">
                      Ajoutée le {new Date(sig.createdAt).toLocaleDateString("fr-FR")}
                    </p>
                    {/* Delete button */}
                    <Button
                      variant="ghost"
                      size="sm"
                      className="absolute top-2 right-2 opacity-0 group-hover:opacity-100 transition-opacity h-7 w-7 p-0 text-red-500 hover:text-red-700 hover:bg-red-50"
                      onClick={() => deleteMutation.mutate({ id: sig.id })}
                      disabled={deleteMutation.isPending}
                      title="Supprimer cette signature"
                    >
                      <Trash2 className="w-4 h-4" />
                    </Button>
                  </div>
                ))}
              </div>
            </div>
          )}
        </CardContent>
      </Card>
    </div>
  );
}

function LlmFieldsConfigSection() {
  const { data: fields, isLoading } = trpc.llmFieldsConfig.getAll.useQuery();
  const utils = trpc.useUtils();
  
  const updateFieldMutation = trpc.llmFieldsConfig.updateField.useMutation({
    onSuccess: () => {
      toast.success("Configuration mise à jour");
      utils.llmFieldsConfig.getAll.invalidate();
    },
    onError: (error) => {
      toast.error(error.message || "Erreur lors de la mise à jour");
    },
  });
  
  const handleToggle = (fieldName: string, currentValue: number) => {
    updateFieldMutation.mutate({
      fieldName,
      isRequired: currentValue === 1 ? 0 : 1,
    });
  };
  
  if (isLoading) {
    return (
      <div className="flex items-center justify-center py-12">
        <Loader2 className="w-8 h-8 animate-spin text-primary" />
      </div>
    );
  }
  
  const requiredCount = fields?.filter(f => f.isRequired === 1).length || 0;
  const totalCount = fields?.length || 0;
  
  return (
    <div className="space-y-6">
      <div className="flex items-center justify-between p-4 bg-gradient-to-r from-blue-50 to-indigo-50 dark:from-blue-950/20 dark:to-indigo-950/20 rounded-lg border border-blue-200 dark:border-blue-800">
        <div className="flex items-center gap-3">
          <div className="p-2 bg-blue-500 rounded-lg">
            <FileCheck className="w-5 h-5 text-white" />
          </div>
          <div>
            <p className="font-medium text-blue-900 dark:text-blue-100">Configuration actuelle</p>
            <p className="text-sm text-blue-700 dark:text-blue-300">
              {requiredCount} champ{requiredCount > 1 ? 's' : ''} obligatoire{requiredCount > 1 ? 's' : ''} sur {totalCount}
            </p>
          </div>
        </div>
        <Badge variant="secondary" className="text-sm">
          Score 100%
        </Badge>
      </div>
      
      <p className="text-sm text-muted-foreground flex items-start gap-2">
        <AlertCircle className="w-4 h-4 mt-0.5 flex-shrink-0" />
        <span>
          Les champs marqués comme obligatoires doivent être détectés pour atteindre un score de 100%. 
          Les champs optionnels n'affectent pas le score.
        </span>
      </p>
      
      <div className="border rounded-lg overflow-hidden">
        <Table>
          <TableHeader>
            <TableRow className="bg-muted/50">
              <TableHead className="font-semibold">Champ</TableHead>
              <TableHead className="text-center font-semibold">Statut</TableHead>
              <TableHead className="text-center font-semibold">Obligatoire</TableHead>
            </TableRow>
          </TableHeader>
          <TableBody>
            {fields?.map((field) => (
              <TableRow key={field.id} className="hover:bg-muted/30 transition-colors">
                <TableCell className="font-medium">{field.displayName}</TableCell>
                <TableCell className="text-center">
                  {field.isRequired === 1 ? (
                    <Badge variant="default" className="bg-green-500 hover:bg-green-600">
                      Obligatoire
                    </Badge>
                  ) : (
                    <Badge variant="secondary">
                      Optionnel
                    </Badge>
                  )}
                </TableCell>
                <TableCell className="text-center">
                  <div className="flex justify-center">
                    <Checkbox
                      checked={field.isRequired === 1}
                      onCheckedChange={() => handleToggle(field.fieldName, field.isRequired)}
                      disabled={updateFieldMutation.isPending}
                      className="data-[state=checked]:bg-green-500 data-[state=checked]:border-green-500"
                    />
                  </div>
                </TableCell>
              </TableRow>
            ))}
          </TableBody>
        </Table>
      </div>
    </div>
  );
}

export default function Settings() {
  const { data: settings, isLoading } = trpc.settings.get.useQuery();
  const utils = trpc.useUtils();

  const [llmModel, setLlmModel] = useState("");
  const [invoiceNumberKeywords, setInvoiceNumberKeywords] = useState("");
  const [deliveryNoteKeywords, setDeliveryNoteKeywords] = useState("");
  const [orderNumberKeywords, setOrderNumberKeywords] = useState("");
  const [supplierKeywords, setSupplierKeywords] = useState("");
  const [totalAmountKeywords, setTotalAmountKeywords] = useState("");
  const [subscriptionKeywords, setSubscriptionKeywords] = useState("");
  const [sftpHost, setSftpHost] = useState("");
  const [sftpPort, setSftpPort] = useState(22);
  const [sftpUsername, setSftpUsername] = useState("");
  const [sftpPassword, setSftpPassword] = useState("");
  const [sftpRemotePath, setSftpRemotePath] = useState("/");
  const [sftpAutoExport, setSftpAutoExport] = useState(false);
  const [llmLogsRetentionMonths, setLlmLogsRetentionMonths] = useState(3);

  useEffect(() => {
    if (settings) {
      setLlmModel(settings.llmModel || "mistral-large-latest");
      setInvoiceNumberKeywords(settings.invoiceNumberKeywords || "");
      setDeliveryNoteKeywords(settings.deliveryNoteKeywords || "");
      setOrderNumberKeywords(settings.orderNumberKeywords || "");
      setSupplierKeywords(settings.supplierKeywords || "");
      setTotalAmountKeywords(settings.totalAmountKeywords || "");
      setSubscriptionKeywords(settings.subscriptionKeywords || "");
      setSftpHost(settings.sftpHost || "");
      setSftpPort(settings.sftpPort || 22);
      setSftpUsername(settings.sftpUsername || "");
      setSftpPassword(settings.sftpPassword || "");
      setSftpRemotePath(settings.sftpRemotePath || "/");
      setSftpAutoExport(settings.sftpAutoExport === 1);
      setLlmLogsRetentionMonths(settings.llmLogsRetentionMonths || 3);
    }
  }, [settings]);

  const saveMutation = trpc.settings.upsert.useMutation({
    onSuccess: () => {
      toast.success("Paramètres enregistrés avec succès");
      utils.settings.get.invalidate();
    },
    onError: (error) => {
      toast.error(error.message || "Erreur lors de l'enregistrement");
    },
  });

  const testSftpMutation = trpc.sftp.testConnection.useMutation({
    onSuccess: (data) => {
      if (data.success) {
        toast.success("✓ Connexion SFTP réussie");
      } else {
        toast.error("✗ Échec de la connexion SFTP");
      }
    },
    onError: (error) => {
      toast.error(error.message || "Erreur lors du test de connexion");
    },
  });

  const handleSave = () => {
    saveMutation.mutate({
      llmModel,
      invoiceNumberKeywords,
      deliveryNoteKeywords,
      orderNumberKeywords,
      supplierKeywords,
      totalAmountKeywords,
      subscriptionKeywords,
      sftpHost,
      sftpPort,
      sftpUsername,
      sftpPassword,
      sftpRemotePath,
      sftpAutoExport: sftpAutoExport ? 1 : 0,
      llmLogsRetentionMonths,
    });
  };

  const handleTestSftp = () => {
    testSftpMutation.mutate();
  };

  if (isLoading) {
    return (
      <DashboardLayout>
        <div className="flex flex-col items-center justify-center h-64 gap-4">
          <Loader2 className="w-12 h-12 animate-spin text-primary" />
          <p className="text-muted-foreground">Chargement des paramètres...</p>
        </div>
      </DashboardLayout>
    );
  }

  const isSftpConfigured = sftpHost && sftpUsername;

  return (
    <DashboardLayout>
      <div className="max-w-5xl space-y-8">
        {/* Header */}
        <div className="space-y-2">
          <div className="flex items-center gap-3">
            <div className="p-3 bg-gradient-to-br from-blue-500 to-indigo-600 rounded-xl shadow-lg">
              <Sparkles className="w-7 h-7 text-white" />
            </div>
            <div>
              <h1 className="text-4xl font-bold bg-gradient-to-r from-blue-600 to-indigo-600 bg-clip-text text-transparent">
                Paramètres
              </h1>
              <p className="text-muted-foreground mt-1">
                Configurez l'extraction et l'export de vos factures
              </p>
            </div>
          </div>
        </div>

        {/* Tabs Navigation */}
        <Tabs defaultValue="llm" className="space-y-6">
          <TabsList className="grid w-full grid-cols-4 h-auto p-1 bg-muted/50">
            <TabsTrigger 
              value="llm" 
              className="flex items-center gap-2 py-3 data-[state=active]:bg-background data-[state=active]:shadow-sm transition-all"
            >
              <Brain className="w-5 h-5" />
              <span className="font-medium">Intelligence AI</span>
            </TabsTrigger>
            <TabsTrigger 
              value="keywords" 
              className="flex items-center gap-2 py-3 data-[state=active]:bg-background data-[state=active]:shadow-sm transition-all"
            >
              <Key className="w-5 h-5" />
              <span className="font-medium">Mots-clés</span>
            </TabsTrigger>
            <TabsTrigger 
              value="sftp" 
              className="flex items-center gap-2 py-3 data-[state=active]:bg-background data-[state=active]:shadow-sm transition-all"
            >
              <Server className="w-5 h-5" />
              <span className="font-medium">Export SFTP</span>
              {isSftpConfigured && (
                <Badge variant="secondary" className="ml-1 bg-green-100 text-green-700 dark:bg-green-900/30 dark:text-green-400">
                  Configuré
                </Badge>
              )}
            </TabsTrigger>
            <TabsTrigger 
              value="signatures" 
              className="flex items-center gap-2 py-3 data-[state=active]:bg-background data-[state=active]:shadow-sm transition-all"
            >
              <PenLine className="w-5 h-5" />
              <span className="font-medium">Signatures</span>
            </TabsTrigger>
          </TabsList>

          {/* LLM Tab */}
          <TabsContent value="llm" className="space-y-6 animate-in fade-in-50 duration-300">
            <Card className="border-2 hover:border-primary/50 transition-colors">
              <CardHeader className="bg-gradient-to-r from-purple-50 to-pink-50 dark:from-purple-950/20 dark:to-pink-950/20 border-b">
                <div className="flex items-center gap-3">
                  <div className="p-2 bg-purple-500 rounded-lg">
                    <Brain className="w-6 h-6 text-white" />
                  </div>
                  <div>
                    <CardTitle className="text-xl">Configuration du modèle AI</CardTitle>
                    <CardDescription className="mt-1">
                      Paramètres du modèle d'extraction Mistral AI
                    </CardDescription>
                  </div>
                </div>
              </CardHeader>
              <CardContent className="space-y-6 pt-6">
                <div className="space-y-3">
                  <Label htmlFor="llmModel" className="text-base font-semibold">Modèle Mistral</Label>
                  <Input
                    id="llmModel"
                    value={llmModel}
                    onChange={(e) => setLlmModel(e.target.value)}
                    placeholder="mistral-large-latest"
                    className="h-11"
                  />
                  <p className="text-sm text-muted-foreground flex items-center gap-2">
                    <AlertCircle className="w-4 h-4" />
                    Nom du modèle Mistral à utiliser pour l'extraction
                  </p>
                </div>

                <div className="space-y-3">
                  <Label htmlFor="llmLogsRetentionMonths" className="text-base font-semibold">
                    Rétention des logs (mois)
                  </Label>
                  <Input
                    id="llmLogsRetentionMonths"
                    type="number"
                    value={llmLogsRetentionMonths}
                    onChange={(e) => setLlmLogsRetentionMonths(parseInt(e.target.value) || 3)}
                    min={1}
                    max={12}
                    className="h-11"
                  />
                  <p className="text-sm text-muted-foreground flex items-center gap-2">
                    <AlertCircle className="w-4 h-4" />
                    Durée de conservation des logs LLM (1-12 mois)
                  </p>
                </div>
              </CardContent>
            </Card>

            <Card className="border-2 hover:border-primary/50 transition-colors">
              <CardHeader className="bg-gradient-to-r from-blue-50 to-cyan-50 dark:from-blue-950/20 dark:to-cyan-950/20 border-b">
                <div className="flex items-center gap-3">
                  <div className="p-2 bg-blue-500 rounded-lg">
                    <FileCheck className="w-6 h-6 text-white" />
                  </div>
                  <div>
                    <CardTitle className="text-xl">Champs de détection</CardTitle>
                    <CardDescription className="mt-1">
                      Configurez quels champs sont obligatoires pour un score de 100%
                    </CardDescription>
                  </div>
                </div>
              </CardHeader>
              <CardContent className="pt-6">
                <LlmFieldsConfigSection />
              </CardContent>
            </Card>
          </TabsContent>

          {/* Keywords Tab */}
          <TabsContent value="keywords" className="space-y-6 animate-in fade-in-50 duration-300">
            <Card className="border-2 hover:border-primary/50 transition-colors">
              <CardHeader className="bg-gradient-to-r from-amber-50 to-orange-50 dark:from-amber-950/20 dark:to-orange-950/20 border-b">
                <div className="flex items-center gap-3">
                  <div className="p-2 bg-amber-500 rounded-lg">
                    <Key className="w-6 h-6 text-white" />
                  </div>
                  <div>
                    <CardTitle className="text-xl">Mots-clés personnalisés</CardTitle>
                    <CardDescription className="mt-1">
                      Améliorez la détection en ajoutant vos propres mots-clés (séparés par des virgules)
                    </CardDescription>
                  </div>
                </div>
              </CardHeader>
              <CardContent className="space-y-6 pt-6">
                <div className="grid gap-6">
                  <div className="space-y-3">
                    <Label htmlFor="invoiceNumberKeywords" className="text-base font-semibold">
                      Numéro de facture
                    </Label>
                    <Textarea
                      id="invoiceNumberKeywords"
                      value={invoiceNumberKeywords}
                      onChange={(e) => setInvoiceNumberKeywords(e.target.value)}
                      placeholder="Référence, Ref facture, Invoice ref"
                      rows={2}
                      className="resize-none"
                    />
                  </div>

                  <div className="space-y-3">
                    <Label htmlFor="deliveryNoteKeywords" className="text-base font-semibold">
                      Bon de livraison
                    </Label>
                    <Textarea
                      id="deliveryNoteKeywords"
                      value={deliveryNoteKeywords}
                      onChange={(e) => setDeliveryNoteKeywords(e.target.value)}
                      placeholder="Livraison, Delivery, Expédition"
                      rows={2}
                      className="resize-none"
                    />
                  </div>

                  <div className="space-y-3">
                    <Label htmlFor="orderNumberKeywords" className="text-base font-semibold">
                      Numéro de commande
                    </Label>
                    <Textarea
                      id="orderNumberKeywords"
                      value={orderNumberKeywords}
                      onChange={(e) => setOrderNumberKeywords(e.target.value)}
                      placeholder="Cde client, Référence commande, PO Number"
                      rows={2}
                      className="resize-none"
                    />
                  </div>

                  <div className="space-y-3">
                    <Label htmlFor="supplierKeywords" className="text-base font-semibold">
                      Fournisseur
                    </Label>
                    <Textarea
                      id="supplierKeywords"
                      value={supplierKeywords}
                      onChange={(e) => setSupplierKeywords(e.target.value)}
                      placeholder="Vendeur, Société, Émetteur"
                      rows={2}
                      className="resize-none"
                    />
                  </div>

                  <div className="space-y-3">
                    <Label htmlFor="totalAmountKeywords" className="text-base font-semibold">
                      Montant total
                    </Label>
                    <Textarea
                      id="totalAmountKeywords"
                      value={totalAmountKeywords}
                      onChange={(e) => setTotalAmountKeywords(e.target.value)}
                      placeholder="Net à payer, Total à régler, Amount due"
                      rows={2}
                      className="resize-none"
                    />
                  </div>

                  <div className="space-y-3">
                    <Label htmlFor="subscriptionKeywords" className="text-base font-semibold">
                      Abonnement
                    </Label>
                    <Textarea
                      id="subscriptionKeywords"
                      value={subscriptionKeywords}
                      onChange={(e) => setSubscriptionKeywords(e.target.value)}
                      placeholder="Abonnement, Subscription, Mensuel, Annuel, Recurring"
                      rows={2}
                      className="resize-none"
                    />
                    <p className="text-sm text-muted-foreground flex items-center gap-2">
                      <AlertCircle className="w-4 h-4" />
                      Les factures contenant ces mots-clés seront automatiquement marquées comme abonnement
                    </p>
                  </div>
                </div>
              </CardContent>
            </Card>
          </TabsContent>

          {/* SFTP Tab */}
          <TabsContent value="sftp" className="space-y-6 animate-in fade-in-50 duration-300">
            <Card className="border-2 hover:border-primary/50 transition-colors">
              <CardHeader className="bg-gradient-to-r from-green-50 to-emerald-50 dark:from-green-950/20 dark:to-emerald-950/20 border-b">
                <div className="flex items-center gap-3">
                  <div className="p-2 bg-green-500 rounded-lg">
                    <Server className="w-6 h-6 text-white" />
                  </div>
                  <div>
                    <CardTitle className="text-xl">Configuration SFTP</CardTitle>
                    <CardDescription className="mt-1">
                      Paramètres d'export automatique vers un serveur SFTP
                    </CardDescription>
                  </div>
                </div>
              </CardHeader>
              <CardContent className="space-y-6 pt-6">
                <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
                  <div className="space-y-3">
                    <Label htmlFor="sftpHost" className="text-base font-semibold">Hôte SFTP</Label>
                    <Input
                      id="sftpHost"
                      value={sftpHost}
                      onChange={(e) => setSftpHost(e.target.value)}
                      placeholder="sftp.example.com"
                      className="h-11"
                    />
                  </div>

                  <div className="space-y-3">
                    <Label htmlFor="sftpPort" className="text-base font-semibold">Port</Label>
                    <Input
                      id="sftpPort"
                      type="number"
                      value={sftpPort}
                      onChange={(e) => setSftpPort(parseInt(e.target.value) || 22)}
                      className="h-11"
                    />
                  </div>
                </div>

                <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
                  <div className="space-y-3">
                    <Label htmlFor="sftpUsername" className="text-base font-semibold">Nom d'utilisateur</Label>
                    <Input
                      id="sftpUsername"
                      value={sftpUsername}
                      onChange={(e) => setSftpUsername(e.target.value)}
                      placeholder="username"
                      className="h-11"
                    />
                  </div>

                  <div className="space-y-3">
                    <Label htmlFor="sftpPassword" className="text-base font-semibold">Mot de passe</Label>
                    <Input
                      id="sftpPassword"
                      type="password"
                      value={sftpPassword}
                      onChange={(e) => setSftpPassword(e.target.value)}
                      placeholder="••••••••"
                      className="h-11"
                    />
                  </div>
                </div>

                <div className="space-y-3">
                  <Label htmlFor="sftpRemotePath" className="text-base font-semibold">Chemin distant</Label>
                  <Input
                    id="sftpRemotePath"
                    value={sftpRemotePath}
                    onChange={(e) => setSftpRemotePath(e.target.value)}
                    placeholder="/invoices"
                    className="h-11"
                  />
                  <p className="text-sm text-muted-foreground flex items-center gap-2">
                    <AlertCircle className="w-4 h-4" />
                    Les fichiers seront organisés par date: /chemin/YYYY/MM/DD/
                  </p>
                </div>

                <div className="flex items-center justify-between p-4 bg-muted/50 rounded-lg border">
                  <div className="space-y-1">
                    <Label htmlFor="sftpAutoExport" className="text-base font-semibold cursor-pointer">
                      Export automatique
                    </Label>
                    <p className="text-sm text-muted-foreground">
                      Exporter automatiquement les factures après extraction
                    </p>
                  </div>
                  <Switch
                    id="sftpAutoExport"
                    checked={sftpAutoExport}
                    onCheckedChange={setSftpAutoExport}
                    className="data-[state=checked]:bg-green-500"
                  />
                </div>

                <div className="pt-4 border-t">
                  <Button
                    variant="outline"
                    onClick={handleTestSftp}
                    disabled={testSftpMutation.isPending || !sftpHost}
                    className="w-full h-11 text-base"
                    size="lg"
                  >
                    {testSftpMutation.isPending ? (
                      <>
                        <Loader2 className="w-5 h-5 mr-2 animate-spin" />
                        Test en cours...
                      </>
                    ) : (
                      <>
                        <CheckCircle className="w-5 h-5 mr-2" />
                        Tester la connexion SFTP
                      </>
                    )}
                  </Button>
                </div>
              </CardContent>
            </Card>
          </TabsContent>

          {/* Signatures Tab */}
          <TabsContent value="signatures" className="space-y-6 animate-in fade-in-50 duration-300">
            <SignaturesSection />
          </TabsContent>
        </Tabs>

        {/* Save Button */}
        <div className="flex justify-end pt-4 border-t">
          <Button 
            onClick={handleSave} 
            disabled={saveMutation.isPending} 
            size="lg"
            className="h-12 px-8 text-base bg-gradient-to-r from-blue-600 to-indigo-600 hover:from-blue-700 hover:to-indigo-700 shadow-lg hover:shadow-xl transition-all"
          >
            {saveMutation.isPending ? (
              <>
                <Loader2 className="w-5 h-5 mr-2 animate-spin" />
                Enregistrement...
              </>
            ) : (
              <>
                <Save className="w-5 h-5 mr-2" />
                Enregistrer les paramètres
              </>
            )}
          </Button>
        </div>
      </div>
    </DashboardLayout>
  );
}