"use client";

import React, { useState } from "react";
import Link from "next/link";
import {
  Search,
  RotateCcw,
  Plus,
  Eye,
  Edit2,
  Trash2,
  ChevronLeft,
  ChevronRight,
  FileSpreadsheet,
  FileText,
  BookOpen,
  CheckCircle2,
  X,
  MapPin,
  Clock,
  Layers,
} from "lucide-react";
import { toast } from "sonner";

interface TheoryLectureRecord {
  id: string;
  day: string;
  timing: string;
  subjectCode: string;
  subjectName: string;
  cohort: string;
  hallLocation: string;
  instructorName: string;
  status: "Scheduled" | "In-Progress" | "Completed";
}

const initialTheoryLectures: TheoryLectureRecord[] = [
  {
    id: "th-1",
    day: "Monday",
    timing: "09:00 AM - 10:00 AM",
    subjectCode: "BHM202",
    subjectName: "Food & Beverage Service Theory",
    cohort: "Semester III (Sec A)",
    hallLocation: "Room 102 (North Wing)",
    instructorName: "Prof. Ananya Sen",
    status: "Scheduled",
  },
  {
    id: "th-2",
    day: "Monday",
    timing: "10:00 AM - 11:00 AM",
    subjectCode: "BHM204",
    subjectName: "Front Office Operations Theory",
    cohort: "Semester III (Sec A)",
    hallLocation: "Room 104 (Auditorium)",
    instructorName: "Prof. Priya Nair",
    status: "Scheduled",
  },
  {
    id: "th-3",
    day: "Tuesday",
    timing: "09:00 AM - 10:00 AM",
    subjectCode: "BHM111",
    subjectName: "Foundation Food Production Theory",
    cohort: "Semester I (Sec B)",
    hallLocation: "Room 201 (Lecture Hall)",
    instructorName: "Chef Amit Roy",
    status: "Scheduled",
  },
  {
    id: "th-4",
    day: "Wednesday",
    timing: "11:15 AM - 12:15 PM",
    subjectCode: "BHM205",
    subjectName: "Accommodation Operations Theory",
    cohort: "Semester III (Sec B)",
    hallLocation: "Room 103 (Main Block)",
    instructorName: "Ms. Moumita Bose",
    status: "Scheduled",
  },
  {
    id: "th-5",
    day: "Thursday",
    timing: "02:00 PM - 03:00 PM",
    subjectCode: "BHM301",
    subjectName: "Food Production Management & Control",
    cohort: "Semester V (Sec A)",
    hallLocation: "Room 205 (Executive Hall)",
    instructorName: "Chef Rajesh Sharma",
    status: "Scheduled",
  },
];

export default function TheorySchedulePage() {
  const [theoryLectures, setTheoryLectures] = useState<TheoryLectureRecord[]>(initialTheoryLectures);
  const [selectedDay, setSelectedDay] = useState("All Days");
  const [selectedCohort, setSelectedCohort] = useState("All Cohorts");
  const [searchQuery, setSearchQuery] = useState("");
  const [selectedRows, setSelectedRows] = useState<string[]>([]);
  const [pageSize, setPageSize] = useState("10");

  // Modal State
  const [isModalOpen, setIsModalOpen] = useState(false);
  const [viewingLecture, setViewingLecture] = useState<TheoryLectureRecord | null>(null);
  const [editingId, setEditingId] = useState<string | null>(null);

  const [formData, setFormData] = useState({
    day: "Monday",
    timing: "09:00 AM - 10:00 AM",
    subjectCode: "BHM202",
    subjectName: "Food & Beverage Service Theory",
    cohort: "Semester III (Sec A)",
    hallLocation: "Room 102 (North Wing)",
    instructorName: "Prof. Ananya Sen",
    status: "Scheduled" as "Scheduled" | "In-Progress" | "Completed",
  });

  const filteredLectures = theoryLectures.filter((t) => {
    const matchesDay = selectedDay === "All Days" || t.day === selectedDay;
    const matchesCohort =
      selectedCohort === "All Cohorts" || t.cohort.includes(selectedCohort);
    const matchesSearch =
      searchQuery === "" ||
      t.subjectCode.toLowerCase().includes(searchQuery.toLowerCase()) ||
      t.subjectName.toLowerCase().includes(searchQuery.toLowerCase()) ||
      t.cohort.toLowerCase().includes(searchQuery.toLowerCase()) ||
      t.hallLocation.toLowerCase().includes(searchQuery.toLowerCase()) ||
      t.instructorName.toLowerCase().includes(searchQuery.toLowerCase());
    return matchesDay && matchesCohort && matchesSearch;
  });

  const handleSelectAll = (e: React.ChangeEvent<HTMLInputElement>) => {
    if (e.target.checked) {
      setSelectedRows(filteredLectures.map((t) => t.id));
    } else {
      setSelectedRows([]);
    }
  };

  const handleRowSelect = (id: string) => {
    setSelectedRows((prev) =>
      prev.includes(id) ? prev.filter((r) => r !== id) : [...prev, id]
    );
  };

  const handleResetFilters = () => {
    setSelectedDay("All Days");
    setSelectedCohort("All Cohorts");
    setSearchQuery("");
    toast.info("Filters reset to default");
  };

  const handleOpenAdd = () => {
    setEditingId(null);
    setFormData({
      day: "Monday",
      timing: "09:00 AM - 10:00 AM",
      subjectCode: "",
      subjectName: "",
      cohort: "Semester III (Sec A)",
      hallLocation: "Room 102 (North Wing)",
      instructorName: "Prof. Ananya Sen",
      status: "Scheduled",
    });
    setIsModalOpen(true);
  };

  const handleEdit = (t: TheoryLectureRecord) => {
    setEditingId(t.id);
    setFormData({
      day: t.day,
      timing: t.timing,
      subjectCode: t.subjectCode,
      subjectName: t.subjectName,
      cohort: t.cohort,
      hallLocation: t.hallLocation,
      instructorName: t.instructorName,
      status: t.status,
    });
    setIsModalOpen(true);
  };

  const handleDelete = (id: string) => {
    setTheoryLectures((prev) => prev.filter((t) => t.id !== id));
    toast.success("Theory lecture removed");
  };

  const handleSubmitForm = (e: React.FormEvent) => {
    e.preventDefault();
    if (!formData.subjectCode || !formData.subjectName) {
      toast.error("Please enter Subject Code and Name");
      return;
    }

    if (editingId) {
      setTheoryLectures((prev) =>
        prev.map((t) =>
          t.id === editingId
            ? {
                ...t,
                day: formData.day,
                timing: formData.timing,
                subjectCode: formData.subjectCode.toUpperCase(),
                subjectName: formData.subjectName,
                cohort: formData.cohort,
                hallLocation: formData.hallLocation,
                instructorName: formData.instructorName,
                status: formData.status,
              }
            : t
        )
      );
      toast.success("Theory lecture slot updated");
    } else {
      const newLecture: TheoryLectureRecord = {
        id: `th-${Date.now()}`,
        day: formData.day,
        timing: formData.timing,
        subjectCode: formData.subjectCode.toUpperCase(),
        subjectName: formData.subjectName,
        cohort: formData.cohort,
        hallLocation: formData.hallLocation,
        instructorName: formData.instructorName,
        status: formData.status,
      };
      setTheoryLectures((prev) => [newLecture, ...prev]);
      toast.success("New theory lecture scheduled");
    }
    setIsModalOpen(false);
  };

  const getStatusBadge = (status: "Scheduled" | "In-Progress" | "Completed") => {
    switch (status) {
      case "Scheduled":
        return "bg-[#E0F2FE] text-[#0369A1] border-[#BAE6FD]";
      case "In-Progress":
        return "bg-[#FEF3C7] text-[#B45309] border-[#FDE68A]";
      case "Completed":
        return "bg-[#DCFCE7] text-[#15803D] border-[#BBF7D0]";
    }
  };

  return (
    <div className="space-y-6 pb-12 font-sans bg-[#F8FAFC] min-h-screen">
      {/* 1. Header Bar */}
      <div>
        <div className="flex items-center gap-2 text-xs text-[#64748B] mb-2 font-medium">
          <Link href="/admin/dashboard" className="hover:text-[#1769E8] transition-colors">
            Home
          </Link>
          <span>&gt;</span>
          <Link href="/admin/timetable" className="hover:text-[#1769E8] transition-colors">
            Timetable Management
          </Link>
          <span>&gt;</span>
          <span className="text-[#071A4D] font-semibold">Theory Schedule</span>
        </div>

        <div className="flex flex-col md:flex-row md:items-center justify-between gap-4">
          <div>
            <h1 className="text-3xl font-bold font-heading text-[#071A4D] tracking-tight">
              Theoretical Lecture Schedule
            </h1>
            <p className="text-[15px] text-[#64748B] mt-1 font-normal">
              Classroom lecture allocations, syllabus subject codes, professor timetables, and student cohort sections.
            </p>
          </div>

          <div className="flex items-center gap-3">
            <button
              onClick={() => toast.success("Exporting theory schedule to Excel...")}
              className="px-4 py-2 bg-white border border-[#E2E8F0] rounded-lg text-sm font-medium text-[#334155] hover:bg-slate-50 transition-colors flex items-center gap-2 shadow-xs cursor-pointer"
            >
              <FileSpreadsheet className="w-4 h-4 text-emerald-600" />
              <span>Export</span>
            </button>
            <button
              onClick={() => toast.info("Generating lecture timetable report...")}
              className="px-4 py-2 bg-white border border-[#E2E8F0] rounded-lg text-sm font-medium text-[#334155] hover:bg-slate-50 transition-colors flex items-center gap-2 shadow-xs cursor-pointer"
            >
              <FileText className="w-4 h-4 text-purple-600" />
              <span>Generate Report</span>
            </button>
            <button
              onClick={handleOpenAdd}
              className="px-5 py-2.5 bg-[#1769E8] hover:bg-[#1255be] text-white rounded-lg text-sm font-semibold transition-colors flex items-center gap-2 shadow-sm cursor-pointer"
            >
              <Plus className="w-4 h-4" />
              <span>+ Add Theory Lecture</span>
            </button>
          </div>
        </div>
      </div>

      {/* 2. Filter Bar */}
      <div className="bg-white rounded-xl border border-[#E5EAF0] shadow-xs p-4">
        <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-12 gap-3.5 items-end">
          <div className="lg:col-span-3">
            <label className="block text-[11px] font-semibold text-[#64748B] uppercase tracking-wider mb-1.5">
              Day of Week
            </label>
            <select
              value={selectedDay}
              onChange={(e) => setSelectedDay(e.target.value)}
              className="w-full bg-white border border-[#E2E8F0] text-sm text-[#0F172A] rounded-lg px-3 py-2 font-medium focus:ring-2 focus:ring-[#1769E8]/20 focus:border-[#1769E8] outline-none transition-all cursor-pointer"
            >
              <option>All Days</option>
              <option>Monday</option>
              <option>Tuesday</option>
              <option>Wednesday</option>
              <option>Thursday</option>
              <option>Friday</option>
            </select>
          </div>

          <div className="lg:col-span-4">
            <label className="block text-[11px] font-semibold text-[#64748B] uppercase tracking-wider mb-1.5">
              Semester Cohort
            </label>
            <select
              value={selectedCohort}
              onChange={(e) => setSelectedCohort(e.target.value)}
              className="w-full bg-white border border-[#E2E8F0] text-sm text-[#0F172A] rounded-lg px-3 py-2 font-medium focus:ring-2 focus:ring-[#1769E8]/20 focus:border-[#1769E8] outline-none transition-all cursor-pointer"
            >
              <option>All Cohorts</option>
              <option>Semester I</option>
              <option>Semester III</option>
              <option>Semester V</option>
            </select>
          </div>

          <div className="lg:col-span-3">
            <label className="block text-[11px] font-semibold text-[#64748B] uppercase tracking-wider mb-1.5">
              Search
            </label>
            <div className="relative">
              <Search className="w-4 h-4 absolute left-3 top-1/2 -translate-y-1/2 text-[#94A3B8]" />
              <input
                type="text"
                value={searchQuery}
                onChange={(e) => setSearchQuery(e.target.value)}
                placeholder="Search code, lecture, professor..."
                className="w-full pl-9 pr-3 py-2 bg-white border border-[#E2E8F0] text-sm text-[#0F172A] placeholder:text-[#94A3B8] rounded-lg focus:ring-2 focus:ring-[#1769E8]/20 focus:border-[#1769E8] outline-none transition-all"
              />
            </div>
          </div>

          <div className="lg:col-span-2 flex items-center gap-2">
            <button
              onClick={() => toast.success(`Found ${filteredLectures.length} lecture slots`)}
              className="flex-1 bg-[#1769E8] hover:bg-[#1255be] text-white py-2 rounded-lg text-sm font-semibold transition-colors flex items-center justify-center gap-1.5 shadow-xs cursor-pointer"
            >
              <Search className="w-4 h-4" />
              <span>Search</span>
            </button>
            <button
              onClick={handleResetFilters}
              className="border border-[#E2E8F0] hover:bg-slate-50 text-[#64748B] p-2 rounded-lg text-sm font-medium transition-colors flex items-center justify-center cursor-pointer"
              title="Reset Filters"
            >
              <RotateCcw className="w-4 h-4" />
            </button>
          </div>
        </div>
      </div>

      {/* 3. Full-Width Table Card */}
      <div className="bg-white rounded-xl border border-[#E5EAF0] shadow-xs overflow-hidden">
        <div className="p-4 border-b border-[#E5EAF0] flex items-center justify-between">
          <div className="flex items-center gap-2.5">
            <BookOpen className="w-5 h-5 text-[#1769E8]" />
            <h2 className="font-heading font-bold text-lg text-[#071A4D]">
              Theory Lectures ({filteredLectures.length})
            </h2>
          </div>
          <div className="flex items-center gap-2">
            <select
              value={pageSize}
              onChange={(e) => setPageSize(e.target.value)}
              className="text-xs bg-white border border-[#E2E8F0] rounded-lg px-2.5 py-1.5 font-medium text-[#475569] outline-none cursor-pointer"
            >
              <option value="10">10 per page</option>
              <option value="25">25 per page</option>
            </select>
          </div>
        </div>

        <div className="overflow-x-auto">
          <table className="w-full text-left text-xs border-collapse">
            <thead>
              <tr className="bg-[#F8FAFC] border-b border-[#E5EAF0] text-[#64748B] font-semibold">
                <th className="py-3 px-3.5 w-10 text-center">
                  <input
                    type="checkbox"
                    checked={
                      selectedRows.length === filteredLectures.length &&
                      filteredLectures.length > 0
                    }
                    onChange={handleSelectAll}
                    className="rounded border-[#CBD5E1] text-[#1769E8] focus:ring-0 cursor-pointer"
                  />
                </th>
                <th className="py-3 px-2 w-8 text-center text-[#64748B]">#</th>
                <th className="py-3 px-3.5 font-bold text-[#071A4D]">Day &amp; Timings</th>
                <th className="py-3 px-3.5 font-bold text-[#071A4D]">Subject &amp; Code</th>
                <th className="py-3 px-3.5 font-bold text-[#071A4D]">Cohort Section</th>
                <th className="py-3 px-3.5 font-bold text-[#071A4D]">Lecture Hall</th>
                <th className="py-3 px-3.5 font-bold text-[#071A4D]">Professor / Lecturer</th>
                <th className="py-3 px-3.5 font-bold text-[#071A4D] text-center">Status</th>
                <th className="py-3 px-4 font-bold text-[#071A4D] text-right">Actions</th>
              </tr>
            </thead>
            <tbody className="divide-y divide-[#E5EAF0]">
              {filteredLectures.length === 0 ? (
                <tr>
                  <td colSpan={9} className="py-12 text-center text-slate-400">
                    No theoretical lectures match your search criteria.
                  </td>
                </tr>
              ) : (
                filteredLectures.map((t, idx) => (
                  <tr
                    key={t.id}
                    className={`hover:bg-[#F8FAFC] transition-colors ${
                      selectedRows.includes(t.id) ? "bg-[#EFF6FF]/40" : ""
                    }`}
                  >
                    <td className="py-3.5 px-3.5 text-center">
                      <input
                        type="checkbox"
                        checked={selectedRows.includes(t.id)}
                        onChange={() => handleRowSelect(t.id)}
                        className="rounded border-[#CBD5E1] text-[#1769E8] focus:ring-0 cursor-pointer"
                      />
                    </td>
                    <td className="py-3.5 px-2 text-center text-[#94A3B8] font-medium">
                      {idx + 1}
                    </td>
                    <td className="py-3.5 px-3.5">
                      <div className="font-bold text-[#071A4D] text-xs">{t.day}</div>
                      <div className="font-mono text-[11px] text-[#64748B]">{t.timing}</div>
                    </td>
                    <td className="py-3.5 px-3.5">
                      <div className="flex items-center gap-1.5">
                        <span className="font-mono font-bold text-[10px] bg-[#F1F6FC] text-[#1769E8] px-1.5 py-0.5 rounded border border-[#D0E2FF]">
                          {t.subjectCode}
                        </span>
                        <span className="font-bold text-[#071A4D] text-xs">
                          {t.subjectName}
                        </span>
                      </div>
                    </td>
                    <td className="py-3.5 px-3.5 font-semibold text-[#334155]">
                      {t.cohort}
                    </td>
                    <td className="py-3.5 px-3.5 text-[#475569]">
                      <div className="flex items-center gap-1.5">
                        <MapPin className="w-3.5 h-3.5 text-[#94A3B8]" />
                        <span>{t.hallLocation}</span>
                      </div>
                    </td>
                    <td className="py-3.5 px-3.5 text-[#334155] font-semibold">
                      {t.instructorName}
                    </td>
                    <td className="py-3.5 px-3.5 text-center">
                      <span
                        className={`inline-flex items-center px-2.5 py-0.5 rounded-full text-[11px] font-bold border ${getStatusBadge(
                          t.status
                        )}`}
                      >
                        {t.status}
                      </span>
                    </td>
                    <td className="py-3.5 px-4 text-right">
                      <div className="flex items-center justify-end gap-1.5">
                        <button
                          onClick={() => setViewingLecture(t)}
                          className="p-1.5 text-[#64748B] hover:text-[#1769E8] hover:bg-[#EFF6FF] rounded-md transition-colors cursor-pointer"
                          title="View Details"
                        >
                          <Eye className="w-3.5 h-3.5" />
                        </button>
                        <button
                          onClick={() => handleEdit(t)}
                          className="p-1.5 text-[#64748B] hover:text-[#1769E8] hover:bg-[#EFF6FF] rounded-md transition-colors cursor-pointer"
                          title="Edit Lecture"
                        >
                          <Edit2 className="w-3.5 h-3.5" />
                        </button>
                        <button
                          onClick={() => handleDelete(t.id)}
                          className="p-1.5 text-[#64748B] hover:text-rose-600 hover:bg-rose-50 rounded-md transition-colors cursor-pointer"
                          title="Delete Lecture"
                        >
                          <Trash2 className="w-3.5 h-3.5" />
                        </button>
                      </div>
                    </td>
                  </tr>
                ))
              )}
            </tbody>
          </table>
        </div>

        <div className="p-4 border-t border-[#E5EAF0] flex flex-col sm:flex-row items-center justify-between gap-3 text-xs text-[#64748B]">
          <div>
            Showing 1 to {filteredLectures.length} of {theoryLectures.length} theory lectures
          </div>
          <div className="flex items-center gap-1">
            <button className="p-1.5 border border-[#E2E8F0] rounded-md hover:bg-slate-50 transition-colors cursor-pointer">
              <ChevronLeft className="w-3.5 h-3.5" />
            </button>
            <button className="px-3 py-1 bg-[#1769E8] text-white font-bold rounded-md text-xs">
              1
            </button>
            <button className="p-1.5 border border-[#E2E8F0] rounded-md hover:bg-slate-50 transition-colors cursor-pointer">
              <ChevronRight className="w-3.5 h-3.5" />
            </button>
          </div>
        </div>
      </div>

      {/* 4. MODAL: + Add / Edit Theory Lecture */}
      {isModalOpen && (
        <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/50 backdrop-blur-xs p-4 animate-in fade-in duration-150">
          <div className="bg-white rounded-2xl border border-[#E5EAF0] shadow-xl max-w-lg w-full overflow-hidden">
            <div className="p-4 border-b border-[#E5EAF0] flex items-center justify-between bg-[#F8FAFC]">
              <div className="flex items-center gap-2">
                <BookOpen className="w-5 h-5 text-[#1769E8]" />
                <h3 className="font-heading font-bold text-base text-[#071A4D]">
                  {editingId ? "Edit Theory Lecture" : "Schedule Theory Lecture"}
                </h3>
              </div>
              <button
                onClick={() => setIsModalOpen(false)}
                className="p-1 text-[#64748B] hover:text-[#071A4D] rounded-md transition-colors cursor-pointer"
              >
                <X className="w-5 h-5" />
              </button>
            </div>

            <form onSubmit={handleSubmitForm} className="p-5 space-y-4 text-xs">
              <div className="grid grid-cols-2 gap-3">
                <div>
                  <label className="block font-semibold text-[#334155] mb-1">
                    Day of Week <span className="text-rose-500">*</span>
                  </label>
                  <select
                    value={formData.day}
                    onChange={(e) => setFormData({ ...formData, day: e.target.value })}
                    className="w-full px-3 py-2 border border-[#E2E8F0] rounded-lg text-sm text-[#0F172A] focus:ring-2 focus:ring-[#1769E8]/20 focus:border-[#1769E8] outline-none transition-all bg-white cursor-pointer"
                  >
                    <option>Monday</option>
                    <option>Tuesday</option>
                    <option>Wednesday</option>
                    <option>Thursday</option>
                    <option>Friday</option>
                  </select>
                </div>

                <div>
                  <label className="block font-semibold text-[#334155] mb-1">
                    Lecture Timing
                  </label>
                  <input
                    type="text"
                    value={formData.timing}
                    onChange={(e) => setFormData({ ...formData, timing: e.target.value })}
                    placeholder="e.g. 09:00 AM - 10:00 AM"
                    className="w-full px-3 py-2 border border-[#E2E8F0] rounded-lg text-sm text-[#0F172A] focus:ring-2 focus:ring-[#1769E8]/20 focus:border-[#1769E8] outline-none transition-all font-mono"
                  />
                </div>
              </div>

              <div className="grid grid-cols-2 gap-3">
                <div>
                  <label className="block font-semibold text-[#334155] mb-1">
                    Subject Code <span className="text-rose-500">*</span>
                  </label>
                  <input
                    type="text"
                    required
                    value={formData.subjectCode}
                    onChange={(e) => setFormData({ ...formData, subjectCode: e.target.value })}
                    placeholder="e.g. BHM202"
                    className="w-full px-3 py-2 border border-[#E2E8F0] rounded-lg text-sm text-[#0F172A] uppercase font-mono focus:ring-2 focus:ring-[#1769E8]/20 focus:border-[#1769E8] outline-none transition-all"
                  />
                </div>

                <div>
                  <label className="block font-semibold text-[#334155] mb-1">
                    Subject Name <span className="text-rose-500">*</span>
                  </label>
                  <input
                    type="text"
                    required
                    value={formData.subjectName}
                    onChange={(e) => setFormData({ ...formData, subjectName: e.target.value })}
                    placeholder="e.g. Food & Beverage Service Theory"
                    className="w-full px-3 py-2 border border-[#E2E8F0] rounded-lg text-sm text-[#0F172A] placeholder:text-[#94A3B8] focus:ring-2 focus:ring-[#1769E8]/20 focus:border-[#1769E8] outline-none transition-all"
                  />
                </div>
              </div>

              <div className="grid grid-cols-2 gap-3">
                <div>
                  <label className="block font-semibold text-[#334155] mb-1">
                    Cohort Section
                  </label>
                  <input
                    type="text"
                    value={formData.cohort}
                    onChange={(e) => setFormData({ ...formData, cohort: e.target.value })}
                    placeholder="e.g. Semester III (Sec A)"
                    className="w-full px-3 py-2 border border-[#E2E8F0] rounded-lg text-sm text-[#0F172A] focus:ring-2 focus:ring-[#1769E8]/20 focus:border-[#1769E8] outline-none transition-all"
                  />
                </div>

                <div>
                  <label className="block font-semibold text-[#334155] mb-1">
                    Lecture Hall
                  </label>
                  <input
                    type="text"
                    value={formData.hallLocation}
                    onChange={(e) => setFormData({ ...formData, hallLocation: e.target.value })}
                    placeholder="e.g. Room 102 (North Wing)"
                    className="w-full px-3 py-2 border border-[#E2E8F0] rounded-lg text-sm text-[#0F172A] focus:ring-2 focus:ring-[#1769E8]/20 focus:border-[#1769E8] outline-none transition-all"
                  />
                </div>
              </div>

              <div>
                <label className="block font-semibold text-[#334155] mb-1">
                  Professor / Lecturer
                </label>
                <select
                  value={formData.instructorName}
                  onChange={(e) => setFormData({ ...formData, instructorName: e.target.value })}
                  className="w-full px-3 py-2 border border-[#E2E8F0] rounded-lg text-sm text-[#0F172A] focus:ring-2 focus:ring-[#1769E8]/20 focus:border-[#1769E8] outline-none transition-all bg-white cursor-pointer"
                >
                  <option>Prof. Ananya Sen</option>
                  <option>Prof. Priya Nair</option>
                  <option>Chef Amit Roy</option>
                  <option>Ms. Moumita Bose</option>
                  <option>Chef Rajesh Sharma</option>
                </select>
              </div>

              <div className="flex items-center gap-2 pt-3 border-t border-[#E5EAF0]">
                <button
                  type="button"
                  onClick={() => setIsModalOpen(false)}
                  className="flex-1 py-2 px-3 border border-[#E2E8F0] text-[#64748B] hover:bg-slate-50 rounded-lg text-xs font-semibold transition-colors cursor-pointer"
                >
                  Cancel
                </button>
                <button
                  type="submit"
                  className="flex-1 py-2 px-3 bg-[#1769E8] hover:bg-[#1255be] text-white rounded-lg text-xs font-semibold transition-colors flex items-center justify-center gap-1.5 shadow-xs cursor-pointer"
                >
                  <CheckCircle2 className="w-3.5 h-3.5" />
                  <span>{editingId ? "Update Lecture" : "Save Lecture"}</span>
                </button>
              </div>
            </form>
          </div>
        </div>
      )}

      {/* 5. MODAL: View Lecture Details */}
      {viewingLecture && (
        <div className="fixed inset-0 z-50 flex items-center justify-center bg-black/50 backdrop-blur-xs p-4 animate-in fade-in duration-150">
          <div className="bg-white rounded-2xl border border-[#E5EAF0] shadow-xl max-w-md w-full overflow-hidden">
            <div className="p-4 border-b border-[#E5EAF0] flex items-center justify-between bg-[#F8FAFC]">
              <div className="flex items-center gap-2">
                <BookOpen className="w-5 h-5 text-[#1769E8]" />
                <h3 className="font-heading font-bold text-base text-[#071A4D]">
                  Theory Lecture Overview
                </h3>
              </div>
              <button
                onClick={() => setViewingLecture(null)}
                className="p-1 text-[#64748B] hover:text-[#071A4D] rounded-md transition-colors cursor-pointer"
              >
                <X className="w-5 h-5" />
              </button>
            </div>

            <div className="p-5 space-y-4 text-xs">
              <div className="flex items-center justify-between pb-3 border-b border-[#E5EAF0]">
                <div>
                  <span className="font-mono text-xs font-bold px-2 py-0.5 rounded bg-blue-50 text-[#1769E8] border border-blue-200">
                    {viewingLecture.subjectCode}
                  </span>
                  <h4 className="font-heading font-bold text-base text-[#071A4D] mt-1.5">
                    {viewingLecture.subjectName}
                  </h4>
                </div>
                <span
                  className={`px-2.5 py-1 rounded-full text-xs font-bold border ${getStatusBadge(
                    viewingLecture.status
                  )}`}
                >
                  {viewingLecture.status}
                </span>
              </div>

              <div className="space-y-2.5">
                <div className="flex items-center justify-between p-2.5 bg-[#F8FAFC] rounded-lg border border-[#E5EAF0]">
                  <span className="font-medium text-[#64748B]">Day &amp; Timings</span>
                  <span className="font-bold text-[#071A4D]">{viewingLecture.day} • {viewingLecture.timing}</span>
                </div>
                <div className="flex items-center justify-between p-2.5 bg-[#F8FAFC] rounded-lg border border-[#E5EAF0]">
                  <span className="font-medium text-[#64748B]">Cohort Section</span>
                  <span className="font-semibold text-[#1769E8]">{viewingLecture.cohort}</span>
                </div>
                <div className="flex items-center justify-between p-2.5 bg-[#F8FAFC] rounded-lg border border-[#E5EAF0]">
                  <span className="font-medium text-[#64748B]">Venue Location</span>
                  <span className="font-bold text-[#071A4D]">{viewingLecture.hallLocation}</span>
                </div>
                <div className="flex items-center justify-between p-2.5 bg-[#F8FAFC] rounded-lg border border-[#E5EAF0]">
                  <span className="font-medium text-[#64748B]">Lecturer In-Charge</span>
                  <span className="font-bold text-[#071A4D]">{viewingLecture.instructorName}</span>
                </div>
              </div>

              <div className="flex items-center justify-end gap-2 pt-3 border-t border-[#E5EAF0]">
                <button
                  type="button"
                  onClick={() => {
                    const toEdit = viewingLecture;
                    setViewingLecture(null);
                    handleEdit(toEdit);
                  }}
                  className="py-2 px-3 border border-[#E2E8F0] hover:bg-slate-50 text-[#334155] rounded-lg text-xs font-semibold transition-colors cursor-pointer"
                >
                  Edit Lecture
                </button>
                <button
                  type="button"
                  onClick={() => setViewingLecture(null)}
                  className="py-2 px-4 bg-[#1769E8] hover:bg-[#1255be] text-white rounded-lg text-xs font-semibold transition-colors cursor-pointer"
                >
                  Close
                </button>
              </div>
            </div>
          </div>
        </div>
      )}
    </div>
  );
}