"use client";

import { useState, useEffect } from "react";
import { 
  Table, 
  TableBody,
  TableCell, 
  TableHead,
  TableHeader,
  TableRow 
} from "@/components/ui/table";
import { Button } from "@/components/ui/button";
import { Input } from "@/components/ui/input";
import { 
  Dialog, 
  DialogContent, 
  DialogHeader, 
  DialogTitle, 
  DialogFooter,
  DialogClose
} from "@/components/ui/dialog";
import { 
  Select, 
  SelectContent, 
  SelectItem, 
  SelectTrigger, 
  SelectValue 
} from "@/components/ui/select";
import {
  Pagination,
  PaginationContent,
  PaginationEllipsis,
  PaginationItem,
  PaginationLink,
  PaginationNext,
  PaginationPrevious,
} from "@/components/ui/pagination";
import { 
  PlusCircle, 
  Pencil, 
  Trash2, 
  Search, 
  X, 
  Loader2,
  BookOpen
} from "lucide-react";
import UploadFileMataKuliah from "@/components/datatable/upload-file-mata-kuliah";
import { useToast } from "@/components/ui/toast-provider";

// Define the MataKuliah type
interface MataKuliah {
  id_mk: number;
  kode_mk: string;
  nama_mk: string;
  sks: number;
  semester: number;
  jenis_mk: 'Wajib' | 'Pilihan Wajib' | 'Pilihan';
  id_prasyarat: number | null;
  nama_prasyarat: string | null;
  created_at: string;
  updated_at: string;
}

export default function DataTableMataKuliah() {
  const { showSuccess, showError } = useToast();
  // State for data
  const [mataKuliah, setMataKuliah] = useState<MataKuliah[]>([]);
  const [filteredData, setFilteredData] = useState<MataKuliah[]>([]);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  
  // State for filtering
  const [searchTerm, setSearchTerm] = useState("");
  const [filterSemester, setFilterSemester] = useState<string>("");
  const [filterJenisMK, setFilterJenisMK] = useState<string>("");
  
  // State for pagination
  const [currentPage, setCurrentPage] = useState(1);
  const [pageSize, setPageSize] = useState(10);
  const [paginatedData, setPaginatedData] = useState<MataKuliah[]>([]);
  
  // State for form
  const [formMode, setFormMode] = useState<"add" | "edit">("add");
  const [formData, setFormData] = useState<Partial<MataKuliah>>({});
  const [isSubmitting, setIsSubmitting] = useState(false);
  const [isDialogOpen, setIsDialogOpen] = useState(false);
  
  // State for delete confirmation
  const [deleteId, setDeleteId] = useState<number | null>(null);
  const [isDeleting, setIsDeleting] = useState(false);
  const [isDeleteDialogOpen, setIsDeleteDialogOpen] = useState(false);

  // State for prasyarat options
  const [prasyaratOptions, setPrasyaratOptions] = useState<MataKuliah[]>([]);

  // Fetch data on component mount
  useEffect(() => {
    fetchMataKuliah();
  }, []);

  // Filter data when search term or filter changes
  useEffect(() => {
    filterData();
  }, [searchTerm, filterSemester, filterJenisMK, mataKuliah]);

  // Update paginated data when filtered data or pagination settings change
  useEffect(() => {
    paginateData();
  }, [filteredData, currentPage, pageSize]);

  // Fetch mata kuliah data from API
  const fetchMataKuliah = async () => {
    try {
      setLoading(true);
      let url = "/api/keloladata/data-mata-kuliah";
      
      // Add filters to URL if they exist
      const params = new URLSearchParams();
      if (searchTerm) {
        params.append("search", searchTerm);
      }
      if (filterSemester && filterSemester !== "all") {
        params.append("semester", filterSemester);
      }
      
      if (params.toString()) {
        url += `?${params.toString()}`;
      }
      
      const response = await fetch(url);
      
      if (!response.ok) {
        throw new Error("Failed to fetch data");
      }
      
      const data = await response.json();
      setMataKuliah(data);
      setFilteredData(data);
      setPrasyaratOptions(data); // Set options for prasyarat dropdown
      setError(null);
    } catch (err) {
      setError("Error fetching data. Please try again later.");
      console.error("Error fetching data:", err);
    } finally {
      setLoading(false);
    }
  };

  // Filter data based on search term and filters
  const filterData = () => {
    let filtered = [...mataKuliah];
    
    // Filter by search term
    if (searchTerm) {
      filtered = filtered.filter(
        (item) =>
          (item.kode_mk && item.kode_mk.toLowerCase().includes(searchTerm.toLowerCase())) ||
          (item.nama_mk && item.nama_mk.toLowerCase().includes(searchTerm.toLowerCase()))
      );
    }
    
    // Filter by semester
    if (filterSemester && filterSemester !== "all") {
      filtered = filtered.filter((item) => item.semester === parseInt(filterSemester));
    }
    
    // Filter by jenis mata kuliah
    if (filterJenisMK && filterJenisMK !== "all") {
      filtered = filtered.filter((item) => item.jenis_mk === filterJenisMK);
    }
    
    setFilteredData(filtered);
    // Reset to first page when filters change
    setCurrentPage(1);
  };

  // Paginate data
  const paginateData = () => {
    const startIndex = (currentPage - 1) * pageSize;
    const endIndex = startIndex + pageSize;
    setPaginatedData(filteredData.slice(startIndex, endIndex));
  };

  // Get total number of pages
  const getTotalPages = () => {
    return Math.ceil(filteredData.length / pageSize);
  };

  // Handle page change
  const handlePageChange = (page: number) => {
    setCurrentPage(page);
  };

  // Handle page size change
  const handlePageSizeChange = (size: string) => {
    setPageSize(Number(size));
    setCurrentPage(1); // Reset to first page when changing page size
  };

  // Reset form data
  const resetForm = () => {
    setFormData({
      jenis_mk: 'Wajib' // Set default value
    });
  };

  // Handle form input changes
  const handleInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {
    const { name, value } = e.target;
    setFormData((prev) => ({ ...prev, [name]: value }));
  };

  // Handle select input changes
  const handleSelectChange = (name: string, value: string) => {
    setFormData((prev) => ({ 
      ...prev, 
      [name]: value === "none" || value === "" ? null : (name === 'id_prasyarat' ? parseInt(value) : value)
    }));
  };

  // Open form dialog for adding new mata kuliah
  const handleAdd = () => {
    setFormMode("add");
    resetForm();
    setIsDialogOpen(true);
  };

  // Open form dialog for editing mata kuliah
  const handleEdit = (data: MataKuliah) => {
    setFormMode("edit");
    setFormData(data);
    setIsDialogOpen(true);
  };

  // Open delete confirmation dialog
  const handleDeleteConfirm = (id: number) => {
    setDeleteId(id);
    setIsDeleteDialogOpen(true);
  };

  // Submit form for add/edit
  const handleSubmit = async (e: React.FormEvent) => {
    e.preventDefault();
    
    try {
      setIsSubmitting(true);
      
      if (formMode === "add") {
        // Add new mata kuliah
        const response = await fetch("/api/keloladata/data-mata-kuliah", {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
          },
          body: JSON.stringify(formData),
        });
        
        const responseData = await response.json();
        
        if (!response.ok) {
          showError("Gagal!", responseData.message || "Failed to add mata kuliah");
          throw new Error(responseData.message || "Failed to add mata kuliah");
        }
        
        showSuccess("Berhasil!", "Mata kuliah berhasil ditambahkan");
      } else {
        // Edit existing mata kuliah
        const response = await fetch(`/api/keloladata/data-mata-kuliah?id=${formData.id_mk}`, {
          method: "PUT",
          headers: {
            "Content-Type": "application/json",
          },
          body: JSON.stringify(formData),
        });
        
        const responseData = await response.json();
        
        if (!response.ok) {
          showError("Gagal!", responseData.message || "Failed to update mata kuliah");
          throw new Error(responseData.message || "Failed to update mata kuliah");
        }
        
        showSuccess("Berhasil!", "Mata kuliah berhasil diperbarui");
      }
      
      // Refresh data after successful operation
      await fetchMataKuliah();
      setIsDialogOpen(false);
      resetForm();
    } catch (err) {
      console.error("Error submitting form:", err);
    } finally {
      setIsSubmitting(false);
    }
  };

  // Delete mata kuliah
  const handleDelete = async () => {
    if (!deleteId) return;
    
    try {
      setIsDeleting(true);
      
      const response = await fetch(`/api/keloladata/data-mata-kuliah?id=${deleteId}`, {
        method: "DELETE",
      });
      
      const responseData = await response.json();
      
      if (!response.ok) {
        showError("Gagal!", responseData.message || "Failed to delete mata kuliah");
        throw new Error(responseData.message || "Failed to delete mata kuliah");
      }
      
      // Refresh data after successful deletion
      await fetchMataKuliah();
      setIsDeleteDialogOpen(false);
      setDeleteId(null);
      showSuccess("Berhasil!", "Mata kuliah berhasil dihapus");
    } catch (err) {
      console.error("Error deleting mata kuliah:", err);
    } finally {
      setIsDeleting(false);
    }
  };

  // Generate pagination items
  const renderPaginationItems = () => {
    const totalPages = getTotalPages();
    const items = [];
    
    // Always show first page
    items.push(
      <PaginationItem key="first">
        <PaginationLink 
          isActive={currentPage === 1} 
          onClick={() => handlePageChange(1)}
          className="cursor-pointer"
        >
          1
        </PaginationLink>
      </PaginationItem>
    );
    
    // Show ellipsis if needed
    if (currentPage > 3) {
      items.push(
        <PaginationItem key="ellipsis-start">
          <PaginationEllipsis />
        </PaginationItem>
      );
    }
    
    // Show pages around current page
    for (let i = Math.max(2, currentPage - 1); i <= Math.min(totalPages - 1, currentPage + 1); i++) {
      if (i === 1 || i === totalPages) continue; // Skip first and last pages as they're always shown
      items.push(
        <PaginationItem key={i}>
          <PaginationLink 
            isActive={currentPage === i} 
            onClick={() => handlePageChange(i)}
            className="cursor-pointer"
          >
            {i}
          </PaginationLink>
        </PaginationItem>
      );
    }
    
    // Show ellipsis if needed
    if (currentPage < totalPages - 2) {
      items.push(
        <PaginationItem key="ellipsis-end">
          <PaginationEllipsis />
        </PaginationItem>
      );
    }
    
    // Always show last page if there's more than one page
    if (totalPages > 1) {
      items.push(
        <PaginationItem key="last">
          <PaginationLink 
            isActive={currentPage === totalPages} 
            onClick={() => handlePageChange(totalPages)}
            className="cursor-pointer"
          >
            {totalPages}
          </PaginationLink>
        </PaginationItem>
      );
    }
    
    return items;
  };

  // Calculate the range of entries being displayed
  const getDisplayRange = () => {
    if (filteredData.length === 0) return { start: 0, end: 0 };
    
    const start = (currentPage - 1) * pageSize + 1;
    const end = Math.min(currentPage * pageSize, filteredData.length);
    
    return { start, end };
  };

  // Get badge color based on semester
  const getSemesterBadgeColor = (semester: number) => {
    const colors = [
      "bg-red-100 text-red-800 dark:bg-red-900 dark:text-red-300",
      "bg-orange-100 text-orange-800 dark:bg-orange-900 dark:text-orange-300", 
      "bg-yellow-100 text-yellow-800 dark:bg-yellow-900 dark:text-yellow-300",
      "bg-green-100 text-green-800 dark:bg-green-900 dark:text-green-300",
      "bg-blue-100 text-blue-800 dark:bg-blue-900 dark:text-blue-300",
      "bg-indigo-100 text-indigo-800 dark:bg-indigo-900 dark:text-indigo-300",
      "bg-purple-100 text-purple-800 dark:bg-purple-900 dark:text-purple-300",
      "bg-pink-100 text-pink-800 dark:bg-pink-900 dark:text-pink-300"
    ];
    return colors[(semester - 1) % colors.length] || "bg-gray-100 text-gray-800 dark:bg-gray-900 dark:text-gray-300";
  };

  // Get badge color based on jenis mata kuliah
  const getJenisMKBadgeColor = (jenis: string) => {
    switch (jenis) {
      case "Wajib":
        return "bg-red-100 text-red-800 dark:bg-red-900 dark:text-red-300";
      case "Pilihan Wajib":
        return "bg-yellow-100 text-yellow-800 dark:bg-yellow-900 dark:text-yellow-300";
      case "Pilihan":
        return "bg-green-100 text-green-800 dark:bg-green-900 dark:text-green-300";
      default:
        return "bg-gray-100 text-gray-800 dark:bg-gray-900 dark:text-gray-300";
    }
  };

  return (
    <div className="space-y-4">
      <div className="flex flex-col sm:flex-row justify-between items-start sm:items-center gap-4">
        <h2 className="text-2xl font-bold dark:text-white">Data Mata Kuliah</h2>
        <div className="flex flex-col sm:flex-row gap-2">
          <UploadFileMataKuliah onUploadSuccess={fetchMataKuliah} />
          <Button onClick={handleAdd}>
            <PlusCircle className="mr-2 h-4 w-4" />
            Tambah Mata Kuliah
          </Button>
        </div>
      </div>

      {/* Filters */}
      <div className="flex flex-col sm:flex-row gap-4">
        <div className="relative flex-1">
          <Search className="absolute left-2.5 top-2.5 h-4 w-4 text-muted-foreground" />
          <Input
            placeholder="Cari berdasarkan kode atau nama mata kuliah..."
            className="pl-8 dark:text-white"
            value={searchTerm}
            onChange={(e) => setSearchTerm(e.target.value)}
          />
          {searchTerm && (
            <X
              className="absolute right-2.5 top-2.5 h-4 w-4 text-muted-foreground cursor-pointer"
              onClick={() => setSearchTerm("")}
            />
          )}
        </div>
        <Select
          value={filterSemester}
          onValueChange={(value) => setFilterSemester(value)}
        >
          <SelectTrigger className="w-[180px] dark:text-white">
            <SelectValue placeholder="Semester" />
          </SelectTrigger>
          <SelectContent>
            <SelectItem value="all">Semua Semester</SelectItem>
            {[1,2,3,4,5,6,7,8].map(sem => (
              <SelectItem key={sem} value={sem.toString()}>Semester {sem}</SelectItem>
            ))}
          </SelectContent>
        </Select>
        <Select
          value={filterJenisMK}
          onValueChange={(value) => setFilterJenisMK(value)}
        >
          <SelectTrigger className="w-[180px] dark:text-white">
            <SelectValue placeholder="Jenis MK" />
          </SelectTrigger>
          <SelectContent>
            <SelectItem value="all">Semua Jenis</SelectItem>
            <SelectItem value="Wajib">Wajib</SelectItem>
            <SelectItem value="Pilihan Wajib">Pilihan Wajib</SelectItem>
            <SelectItem value="Pilihan">Pilihan</SelectItem>
          </SelectContent>
        </Select>
      </div>

      {/* Show entries selector */}
      <div className="flex items-center gap-2 dark:text-white">
        <span className="text-sm">Show</span>
        <Select
          value={pageSize.toString()}
          onValueChange={handlePageSizeChange}
        >
          <SelectTrigger className="w-[80px] dark:text-white">
            <SelectValue placeholder={pageSize.toString()} />
          </SelectTrigger>
          <SelectContent>
            <SelectItem value="5">5</SelectItem>
            <SelectItem value="10">10</SelectItem>
            <SelectItem value="25">25</SelectItem>
            <SelectItem value="50">50</SelectItem>
            <SelectItem value="100">100</SelectItem>
          </SelectContent>
        </Select>
        <span className="text-sm">entries</span>
      </div>

      {/* Table */}
      {loading ? (
        <div className="flex justify-center items-center py-8">
          <Loader2 className="h-8 w-8 animate-spin text-primary" />
        </div>
      ) : error ? (
        <div className="bg-destructive/10 p-4 rounded-md text-destructive text-center">
          {error}
        </div>
      ) : (
        <div className="border rounded-md dark:border-gray-700">
          <Table>
            <TableHeader>
              <TableRow className="dark:border-gray-700">
                <TableHead className="dark:text-gray-300">Kode MK</TableHead>
                <TableHead className="dark:text-gray-300">Nama Mata Kuliah</TableHead>
                <TableHead className="text-center dark:text-gray-300">SKS</TableHead>
                <TableHead className="text-center dark:text-gray-300">Semester</TableHead>
                <TableHead className="text-center dark:text-gray-300">Jenis MK</TableHead>
                <TableHead className="dark:text-gray-300">Prasyarat</TableHead>
                <TableHead className="text-right dark:text-gray-300">Aksi</TableHead>
              </TableRow>
            </TableHeader>
            <TableBody>
              {paginatedData.length === 0 ? (
                <TableRow className="dark:border-gray-700">
                  <TableCell colSpan={7} className="text-center py-8 dark:text-gray-400">
                    Tidak ada data yang sesuai dengan filter
                  </TableCell>
                </TableRow>
              ) : (
                paginatedData.map((mk) => (
                  <TableRow key={mk.id_mk} className="dark:border-gray-700">
                    <TableCell className="font-medium dark:text-white">{mk.kode_mk}</TableCell>
                    <TableCell className="dark:text-white">{mk.nama_mk}</TableCell>
                    <TableCell className="text-center dark:text-white">{mk.sks}</TableCell>
                    <TableCell className="text-center">
                      <span
                        className={`px-2 py-1 rounded-full text-xs font-medium ${getSemesterBadgeColor(mk.semester)}`}
                      >
                        Semester {mk.semester}
                      </span>
                    </TableCell>
                    <TableCell className="text-center">
                      <span
                        className={`px-2 py-1 rounded-full text-xs font-medium ${getJenisMKBadgeColor(mk.jenis_mk)}`}
                      >
                        {mk.jenis_mk}
                      </span>
                    </TableCell>
                    <TableCell className="dark:text-white">
                      {mk.nama_prasyarat || '-'}
                    </TableCell>
                    <TableCell className="text-right">
                      <div className="flex justify-end gap-2">
                        <Button
                          size="sm"
                          variant="outline"
                          onClick={() => handleEdit(mk)}
                        >
                          <Pencil className="h-4 w-4" />
                        </Button>
                        <Button
                          size="sm"
                          variant="outline"
                          className="text-destructive hover:bg-destructive/10"
                          onClick={() => handleDeleteConfirm(mk.id_mk)}
                        >
                          <Trash2 className="h-4 w-4" />
                        </Button>
                      </div>
                    </TableCell>
                  </TableRow>
                ))
              )}
            </TableBody>
          </Table>
        </div>
      )}

      {/* Pagination info and controls */}
      {!loading && !error && filteredData.length > 0 && (
        <div className="flex flex-col sm:flex-row justify-between items-center gap-4">
          <div className="text-sm text-muted-foreground dark:text-white">
            Showing {getDisplayRange().start} to {getDisplayRange().end} of {filteredData.length} entries
          </div>
          <Pagination>
            <PaginationContent className="dark:text-white">
              <PaginationItem>
                <PaginationPrevious 
                  onClick={() => handlePageChange(Math.max(1, currentPage - 1))}
                  className={currentPage === 1 ? "pointer-events-none opacity-50" : "cursor-pointer"}
                />
              </PaginationItem>
              
              {renderPaginationItems()}
              
              <PaginationItem>
                <PaginationNext 
                  onClick={() => handlePageChange(Math.min(getTotalPages(), currentPage + 1))}
                  className={currentPage === getTotalPages() ? "pointer-events-none opacity-50" : "cursor-pointer"}
                />
              </PaginationItem>
            </PaginationContent>
          </Pagination>
        </div>
      )}

      {/* Add/Edit Dialog */}
      <Dialog open={isDialogOpen} onOpenChange={setIsDialogOpen}>
        <DialogContent className="sm:max-w-[600px] dark:bg-slate-900">
          <DialogHeader>
            <DialogTitle className="dark:text-white">
              {formMode === "add" ? "Tambah Mata Kuliah" : "Edit Mata Kuliah"}
            </DialogTitle>
          </DialogHeader>
          <form onSubmit={handleSubmit}>
            <div className="grid gap-4 py-4">
              <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                <div className="space-y-2">
                  <label htmlFor="kode_mk" className="text-sm font-medium dark:text-white">
                    Kode Mata Kuliah <span className="text-destructive">*</span>
                  </label>
                  <Input
                    id="kode_mk"
                    name="kode_mk"
                    value={formData.kode_mk || ""}
                    onChange={handleInputChange}
                    placeholder="Contoh: INF101"
                    className="dark:text-white"
                    required
                  />
                </div>
                <div className="space-y-2">
                  <label htmlFor="sks" className="text-sm font-medium dark:text-white">
                    SKS <span className="text-destructive">*</span>
                  </label>
                  <Input
                    id="sks"
                    name="sks"
                    type="number"
                    min="1"
                    max="6"
                    value={formData.sks || ""}
                    onChange={handleInputChange}
                    className="dark:text-white"
                    required
                  />
                </div>
                <div className="space-y-2">
                  <label htmlFor="jenis_mk" className="text-sm font-medium dark:text-white">
                    Jenis Mata Kuliah <span className="text-destructive">*</span>
                  </label>
                  <Select
                    value={formData.jenis_mk || "Wajib"}
                    onValueChange={(value) => handleSelectChange("jenis_mk", value)}
                  >
                    <SelectTrigger className="dark:text-white">
                      <SelectValue />
                    </SelectTrigger>
                    <SelectContent>
                      <SelectItem value="Wajib">Wajib</SelectItem>
                      <SelectItem value="Pilihan Wajib">Pilihan Wajib</SelectItem>
                      <SelectItem value="Pilihan">Pilihan</SelectItem>
                    </SelectContent>
                  </Select>
                </div>
                <div className="space-y-2 sm:col-span-2">
                  <label htmlFor="nama_mk" className="text-sm font-medium dark:text-white">
                    Nama Mata Kuliah <span className="text-destructive">*</span>
                  </label>
                  <Input
                    id="nama_mk"
                    name="nama_mk"
                    value={formData.nama_mk || ""}
                    onChange={handleInputChange}
                    placeholder="Contoh: Pengantar Informatika"
                    className="dark:text-white"
                    required
                  />
                </div>
                <div className="space-y-2">
                  <label htmlFor="semester" className="text-sm font-medium dark:text-white">
                    Semester <span className="text-destructive">*</span>
                  </label>
                  <Select
                    value={formData.semester?.toString() || ""}
                    onValueChange={(value) => handleSelectChange("semester", value)}
                  >
                    <SelectTrigger className="dark:text-white">
                      <SelectValue placeholder="Pilih Semester" />
                    </SelectTrigger>
                    <SelectContent>
                      {[1,2,3,4,5,6,7,8].map(sem => (
                        <SelectItem key={sem} value={sem.toString()}>Semester {sem}</SelectItem>
                      ))}
                    </SelectContent>
                  </Select>
                </div>
                <div className="space-y-2">
                  <label htmlFor="id_prasyarat" className="text-sm font-medium dark:text-white">
                    Mata Kuliah Prasyarat
                  </label>
                  <Select
                    value={formData.id_prasyarat?.toString() || "none"}
                    onValueChange={(value) => handleSelectChange("id_prasyarat", value)}
                  >
                    <SelectTrigger className="dark:text-white">
                      <SelectValue placeholder="Pilih Prasyarat (Opsional)" />
                    </SelectTrigger>
                    <SelectContent>
                      <SelectItem value="none">Tidak Ada Prasyarat</SelectItem>
                      {prasyaratOptions
                        .filter(mk => mk.id_mk !== formData.id_mk) // Exclude current mata kuliah
                        .map(mk => (
                        <SelectItem key={mk.id_mk} value={mk.id_mk.toString()}>
                          {mk.kode_mk} - {mk.nama_mk}
                        </SelectItem>
                      ))}
                    </SelectContent>
                  </Select>
                </div>
              </div>
            </div>
            <DialogFooter>
              <DialogClose asChild>
                <Button type="button" variant="outline">
                  Batal
                </Button>
              </DialogClose>
              <Button type="submit" disabled={isSubmitting}>
                {isSubmitting && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
                {formMode === "add" ? "Tambah" : "Simpan"}
              </Button>
            </DialogFooter>
          </form>
        </DialogContent>
      </Dialog>

      {/* Delete Confirmation Dialog */}
      <Dialog open={isDeleteDialogOpen} onOpenChange={setIsDeleteDialogOpen}>
        <DialogContent className="sm:max-w-[400px] dark:bg-slate-900">
          <DialogHeader>
            <DialogTitle className="dark:text-white">Konfirmasi Hapus</DialogTitle>
          </DialogHeader>
          <div className="py-4">
            <p className="dark:text-white">Apakah Anda yakin ingin menghapus mata kuliah ini?</p>
            <p className="text-sm text-muted-foreground mt-1 dark:text-gray-400">
              Tindakan ini tidak dapat dibatalkan.
            </p>
          </div>
          <DialogFooter>
            <DialogClose asChild>
              <Button type="button" variant="outline">
                Batal
              </Button>
            </DialogClose>
            <Button
              variant="destructive"
              onClick={handleDelete}
              disabled={isDeleting}
            >
              {isDeleting && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
              Hapus
            </Button>
          </DialogFooter>
        </DialogContent>
      </Dialog>
    </div>
  );
}