"use client";

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

interface SubstitutionRecord {
  id: string;
  sessionDate: string;
  timeSlot: string;
  subjectCode: string;
  subjectName: string;
  batchName: string;
  roomName: string;
  hours: number;
  originalFaculty: string;
  substituteFaculty: string;
  reason: string;
  status: "Approved" | "Pending" | "Rejected";
}

const initialSubstitutions: SubstitutionRecord[] = [
  {
    id: "subst-101",
    sessionDate: "2026-10-08",
    timeSlot: "09:00 – 13:00",
    subjectCode: "BHM201",
    subjectName: "Food Production Operations Practical",
    batchName: "Batch B1",
    roomName: "Basic Training Kitchen B",
    hours: 4.0,
    originalFaculty: "Chef Rajesh Sharma",
    substituteFaculty: "Chef Amit Roy",
    reason: "Attending NCHMCT Curriculum Moderation Committee Meeting",
    status: "Approved",
  },
  {
    id: "subst-102",
    sessionDate: "2026-10-09",
    timeSlot: "14:00 – 15:00",
    subjectCode: "BHM202",
    subjectName: "Food & Beverage Service Theory",
    batchName: "Semester III",
    roomName: "Lecture Hall 101",
    hours: 1.0,
    originalFaculty: "Prof. Ananya Sen",
    substituteFaculty: "Prof. Priya Nair",
    reason: "On-duty deputation for Raj Bhavan state banquet setup",
    status: "Pending",
  },
  {
    id: "subst-103",
    sessionDate: "2026-10-10",
    timeSlot: "09:00 – 13:00",
    subjectCode: "BHM203",
    subjectName: "Bakery & Confectionery Practical",
    batchName: "Batch B2",
    roomName: "Bakery Lab BAK-1",
    hours: 4.0,
    originalFaculty: "Chef Vikram Singh",
    substituteFaculty: "Chef Debashis Paul",
    reason: "Medical leave - outpatient dental treatment",
    status: "Approved",
  },
];

export default function FacultySubstitutionsPage() {
  const [substitutions, setSubstitutions] = useState<SubstitutionRecord[]>(initialSubstitutions);
  const [selectedStatus, setSelectedStatus] = useState("All Status");
  const [searchQuery, setSearchQuery] = useState("");
  const [selectedRows, setSelectedRows] = useState<string[]>([]);
  const [pageSize, setPageSize] = useState("10");

  // Form State
  const [editingId, setEditingId] = useState<string | null>(null);
  const [formData, setFormData] = useState({
    sessionDate: "2026-10-08",
    timeSlot: "09:00 – 13:00",
    subjectCode: "BHM201",
    subjectName: "Food Production Operations Practical",
    batchName: "Batch B1",
    roomName: "Basic Training Kitchen B",
    hours: 4.0,
    originalFaculty: "Chef Rajesh Sharma",
    substituteFaculty: "Chef Amit Roy",
    reason: "",
    status: "Pending" as "Approved" | "Pending" | "Rejected",
  });

  const filteredSubstitutions = substitutions.filter((s) => {
    const matchesStatus =
      selectedStatus === "All Status" || s.status === selectedStatus;
    const matchesSearch =
      searchQuery === "" ||
      s.subjectCode.toLowerCase().includes(searchQuery.toLowerCase()) ||
      s.originalFaculty.toLowerCase().includes(searchQuery.toLowerCase()) ||
      s.substituteFaculty.toLowerCase().includes(searchQuery.toLowerCase()) ||
      s.sessionDate.includes(searchQuery);
    return matchesStatus && matchesSearch;
  });

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

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

  const handleResetFilters = () => {
    setSelectedStatus("All Status");
    setSearchQuery("");
    toast.info("Filters reset to default");
  };

  const handleEdit = (s: SubstitutionRecord) => {
    setEditingId(s.id);
    setFormData({
      sessionDate: s.sessionDate,
      timeSlot: s.timeSlot,
      subjectCode: s.subjectCode,
      subjectName: s.subjectName,
      batchName: s.batchName,
      roomName: s.roomName,
      hours: s.hours,
      originalFaculty: s.originalFaculty,
      substituteFaculty: s.substituteFaculty,
      reason: s.reason,
      status: s.status,
    });
  };

  const handleDelete = (id: string) => {
    setSubstitutions((prev) => prev.filter((s) => s.id !== id));
    toast.success("Substitution assignment removed");
  };

  const handleCancelForm = () => {
    setEditingId(null);
    setFormData({
      sessionDate: "2026-10-08",
      timeSlot: "09:00 – 13:00",
      subjectCode: "BHM201",
      subjectName: "Food Production Operations Practical",
      batchName: "Batch B1",
      roomName: "Basic Training Kitchen B",
      hours: 4.0,
      originalFaculty: "Chef Rajesh Sharma",
      substituteFaculty: "Chef Amit Roy",
      reason: "",
      status: "Pending",
    });
  };

  const handleSubmitForm = (e: React.FormEvent) => {
    e.preventDefault();
    if (editingId) {
      setSubstitutions((prev) =>
        prev.map((s) =>
          s.id === editingId
            ? {
                ...s,
                sessionDate: formData.sessionDate,
                timeSlot: formData.timeSlot,
                subjectCode: formData.subjectCode,
                subjectName: formData.subjectName,
                batchName: formData.batchName,
                roomName: formData.roomName,
                hours: formData.hours,
                originalFaculty: formData.originalFaculty,
                substituteFaculty: formData.substituteFaculty,
                reason: formData.reason,
                status: formData.status,
              }
            : s
        )
      );
      toast.success("Substitution updated successfully");
    } else {
      const newSub: SubstitutionRecord = {
        id: `subst-${Date.now()}`,
        sessionDate: formData.sessionDate,
        timeSlot: formData.timeSlot,
        subjectCode: formData.subjectCode,
        subjectName: formData.subjectName,
        batchName: formData.batchName,
        roomName: formData.roomName,
        hours: formData.hours,
        originalFaculty: formData.originalFaculty,
        substituteFaculty: formData.substituteFaculty,
        reason: formData.reason,
        status: formData.status,
      };
      setSubstitutions((prev) => [newSub, ...prev]);
      toast.success("New faculty substitution logged");
    }
    handleCancelForm();
  };

  const getStatusBadge = (status: string) => {
    switch (status) {
      case "Approved":
        return "bg-[#DCFCE7] text-[#15803D] border-[#BBF7D0]";
      case "Pending":
        return "bg-[#FEF3C7] text-[#B45309] border-[#FDE68A]";
      case "Rejected":
        return "bg-[#FEE2E2] text-[#DC2626] border-[#FECACA]";
      default:
        return "bg-slate-100 text-slate-700 border-slate-200";
    }
  };

  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/people/faculty" className="hover:text-[#1769E8] transition-colors">
            Faculty Management
          </Link>
          <span>&gt;</span>
          <span className="text-[#071A4D] font-semibold">Faculty Substitutions</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">
              Faculty Substitutions
            </h1>
            <p className="text-[15px] text-[#64748B] mt-1 font-normal">
              Manage temporary instructor substitutions, duty handovers, and conflict checks for absent faculty.
            </p>
          </div>

          <div className="flex items-center gap-3">
            <button
              onClick={() => toast.success("Exporting substitutions 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 faculty substitution 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={() => {
                setEditingId(null);
                setFormData({
                  sessionDate: "2026-10-08",
                  timeSlot: "09:00 – 13:00",
                  subjectCode: "BHM201",
                  subjectName: "Food Production Operations Practical",
                  batchName: "Batch B1",
                  roomName: "Basic Training Kitchen B",
                  hours: 4.0,
                  originalFaculty: "Chef Rajesh Sharma",
                  substituteFaculty: "Chef Amit Roy",
                  reason: "",
                  status: "Pending",
                });
              }}
              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>+ New Substitution</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">
              Status
            </label>
            <select
              value={selectedStatus}
              onChange={(e) => setSelectedStatus(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 Status</option>
              <option>Approved</option>
              <option>Pending</option>
              <option>Rejected</option>
            </select>
          </div>

          <div className="lg:col-span-7">
            <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 subject code, faculty, substitute, or date..."
                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 ${filteredSubstitutions.length} substitutions`)}
              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. Main Split Layout */}
      <div className="grid grid-cols-1 lg:grid-cols-12 gap-6 items-start">
        {/* Left (8 cols): Table */}
        <div className="lg:col-span-8 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">
              <UserCheck className="w-5 h-5 text-[#1769E8]" />
              <h2 className="font-heading font-bold text-lg text-[#071A4D]">
                Substitutions Register ({filteredSubstitutions.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 === filteredSubstitutions.length &&
                        filteredSubstitutions.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]">Date &amp; Slot</th>
                  <th className="py-3 px-3.5 font-bold text-[#071A4D]">Subject &amp; Batch</th>
                  <th className="py-3 px-3.5 font-bold text-[#071A4D]">Original Faculty</th>
                  <th className="py-3 px-3.5 font-bold text-[#071A4D]">Substitute Faculty</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]">
                {filteredSubstitutions.length === 0 ? (
                  <tr>
                    <td colSpan={8} className="py-12 text-center text-slate-400">
                      No substitution assignments match your filters.
                    </td>
                  </tr>
                ) : (
                  filteredSubstitutions.map((s, idx) => (
                    <tr
                      key={s.id}
                      className={`hover:bg-[#F8FAFC] transition-colors ${
                        selectedRows.includes(s.id) ? "bg-[#EFF6FF]/40" : ""
                      }`}
                    >
                      <td className="py-3.5 px-3.5 text-center">
                        <input
                          type="checkbox"
                          checked={selectedRows.includes(s.id)}
                          onChange={() => handleRowSelect(s.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-mono font-bold text-xs text-[#071A4D]">
                          {s.sessionDate}
                        </div>
                        <div className="text-[11px] text-[#64748B]">{s.timeSlot}</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-xs bg-[#F1F6FC] text-[#1769E8] px-2 py-0.5 rounded border border-[#D0E2FF]">
                            {s.subjectCode}
                          </span>
                          <span className="font-semibold text-[#334155]">{s.batchName}</span>
                        </div>
                        <div className="text-[10px] text-[#64748B] mt-0.5">{s.roomName}</div>
                      </td>
                      <td className="py-3.5 px-3.5 font-medium text-[#334155]">
                        {s.originalFaculty}
                      </td>
                      <td className="py-3.5 px-3.5 font-semibold text-[#1769E8]">
                        <div className="flex items-center gap-1">
                          <ArrowRight className="w-3 h-3 text-[#1769E8]" />
                          <span>{s.substituteFaculty}</span>
                        </div>
                      </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(
                            s.status
                          )}`}
                        >
                          {s.status}
                        </span>
                      </td>
                      <td className="py-3.5 px-4 text-right">
                        <div className="flex items-center justify-end gap-1.5">
                          <button
                            onClick={() => toast.info(`Reason: ${s.reason}`)}
                            className="p-1.5 text-[#64748B] hover:text-[#1769E8] hover:bg-[#EFF6FF] rounded-md transition-colors cursor-pointer"
                            title="View Reason"
                          >
                            <Eye className="w-3.5 h-3.5" />
                          </button>
                          <button
                            onClick={() => handleEdit(s)}
                            className="p-1.5 text-[#64748B] hover:text-[#1769E8] hover:bg-[#EFF6FF] rounded-md transition-colors cursor-pointer"
                            title="Edit Record"
                          >
                            <Edit2 className="w-3.5 h-3.5" />
                          </button>
                          <button
                            onClick={() => handleDelete(s.id)}
                            className="p-1.5 text-[#64748B] hover:text-rose-600 hover:bg-rose-50 rounded-md transition-colors cursor-pointer"
                            title="Delete Record"
                          >
                            <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 {filteredSubstitutions.length} of {substitutions.length} substitutions
            </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>

        {/* Right (4 cols): Form + Guidelines */}
        <div className="lg:col-span-4 space-y-5">
          <div className="bg-white rounded-xl border border-[#E5EAF0] shadow-xs p-5">
            <div className="flex items-center justify-between pb-3 mb-4 border-b border-[#E5EAF0]">
              <div className="flex items-center gap-2">
                <UserCheck className="w-4 h-4 text-[#1769E8]" />
                <h3 className="font-heading font-bold text-base text-[#071A4D]">
                  {editingId ? "Edit Substitution" : "Assign Substitute"}
                </h3>
              </div>
              {editingId && (
                <span className="text-[10px] font-bold px-2 py-0.5 bg-amber-50 text-amber-700 border border-amber-200 rounded-full">
                  Editing
                </span>
              )}
            </div>

            <form onSubmit={handleSubmitForm} className="space-y-4 text-xs">
              <div className="grid grid-cols-2 gap-3">
                <div>
                  <label className="block font-semibold text-[#334155] mb-1">
                    Date <span className="text-rose-500">*</span>
                  </label>
                  <input
                    type="date"
                    required
                    value={formData.sessionDate}
                    onChange={(e) =>
                      setFormData({ ...formData, sessionDate: 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 font-mono"
                  />
                </div>

                <div>
                  <label className="block font-semibold text-[#334155] mb-1">
                    Time Slot
                  </label>
                  <select
                    value={formData.timeSlot}
                    onChange={(e) =>
                      setFormData({ ...formData, timeSlot: 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 font-mono"
                  >
                    <option>09:00 – 13:00</option>
                    <option>14:00 – 15:00</option>
                    <option>10:00 – 13:00</option>
                  </select>
                </div>
              </div>

              <div>
                <label className="block font-semibold text-[#334155] mb-1">
                  Absent Faculty Instructor <span className="text-rose-500">*</span>
                </label>
                <select
                  value={formData.originalFaculty}
                  onChange={(e) =>
                    setFormData({ ...formData, originalFaculty: 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>Chef Rajesh Sharma</option>
                  <option>Prof. Ananya Sen</option>
                  <option>Chef Vikram Singh</option>
                  <option>Prof. Priya Nair</option>
                </select>
              </div>

              <div>
                <label className="block font-semibold text-[#334155] mb-1">
                  Substitute Instructor <span className="text-rose-500">*</span>
                </label>
                <select
                  value={formData.substituteFaculty}
                  onChange={(e) =>
                    setFormData({ ...formData, substituteFaculty: 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>Chef Amit Roy</option>
                  <option>Chef Debashis Paul</option>
                  <option>Prof. Priya Nair</option>
                  <option>Ms. Moumita Bose</option>
                </select>
              </div>

              <div>
                <label className="block font-semibold text-[#334155] mb-1">
                  Subject Course
                </label>
                <input
                  type="text"
                  value={`${formData.subjectCode} - ${formData.subjectName}`}
                  onChange={(e) =>
                    setFormData({ ...formData, subjectName: 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"
                />
              </div>

              <div>
                <label className="block font-semibold text-[#334155] mb-1">
                  Official Reason
                </label>
                <textarea
                  rows={2}
                  value={formData.reason}
                  onChange={(e) => setFormData({ ...formData, reason: e.target.value })}
                  placeholder="e.g. Deputation, official review, or sick leave..."
                  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 resize-none"
                />
              </div>

              <div>
                <label className="block font-semibold text-[#334155] mb-1">
                  Approval Status
                </label>
                <select
                  value={formData.status}
                  onChange={(e) =>
                    setFormData({
                      ...formData,
                      status: e.target.value as "Approved" | "Pending" | "Rejected",
                    })
                  }
                  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 value="Pending">Pending HOD Sign-off</option>
                  <option value="Approved">Approved (Session Assigned)</option>
                  <option value="Rejected">Rejected</option>
                </select>
              </div>

              <div className="flex items-center gap-2 pt-3 border-t border-[#E5EAF0]">
                <button
                  type="button"
                  onClick={handleCancelForm}
                  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"
                >
                  <UserCheck className="w-3.5 h-3.5" />
                  <span>{editingId ? "Update" : "Confirm Substitution"}</span>
                </button>
              </div>
            </form>
          </div>

          {/* Policy Card */}
          <div className="bg-white rounded-xl border border-[#E5EAF0] shadow-xs p-4 text-xs">
            <div className="flex items-center gap-2 font-bold text-[#071A4D] mb-2.5 pb-2 border-b border-[#E5EAF0]">
              <Sparkles className="w-4 h-4 text-amber-500" />
              <span>Substitution Governance</span>
            </div>
            <div className="space-y-2 text-[#475569]">
              <div className="flex items-center justify-between">
                <span className="font-medium">Departmental Handover</span>
                <span className="font-mono font-bold text-[#071A4D]">Same Department</span>
              </div>
              <div className="flex items-center justify-between">
                <span className="font-medium">HOD Clearance Window</span>
                <span className="font-mono font-bold text-[#1769E8]">24h Prior</span>
              </div>
              <div className="flex items-center justify-between">
                <span className="font-medium">Teaching Workload Credit</span>
                <span className="font-mono font-bold text-[#071A4D]">Credited to Substitute</span>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
  );
}