"use client";

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

export default function SemesterwiseAttendanceReportPage() {
  const [searchQuery, setSearchQuery] = useState("");
  const [selectedRows, setSelectedRows] = useState<number[]>([]);
  const [pageSize, setPageSize] = useState("10");

  const allRows = [
    ["Semester I (Batch 2026-29)","Odd Session 2026-27","156 Students","312 Sessions","92.40%","144 Students (92.3%)","2.5%"],
    ["Semester III (Batch 2025-28)","Odd Session 2026-27","142 Students","340 Sessions","91.80%","128 Students (90.1%)","2.8%"],
    ["Semester V (Batch 2024-27)","Odd Session 2026-27","138 Students","360 Sessions","93.50%","130 Students (94.2%)","1.4%"],
    ["Diploma Food Prod (2026)","Academic Year 2026-27","45 Students","240 Sessions","90.10%","39 Students (86.6%)","4.4%"],
    ["Diploma F&B Service (2026)","Academic Year 2026-27","40 Students","240 Sessions","88.90%","34 Students (85.0%)","5.0%"]
  ];

  const filteredRows = allRows.filter((r) =>
    searchQuery === "" || r.some((c) => String(c).toLowerCase().includes(searchQuery.toLowerCase()))
  );

  const handleSelectAll = (e: React.ChangeEvent<HTMLInputElement>) => {
    if (e.target.checked) {
      setSelectedRows(filteredRows.map((_, i) => i));
    } else {
      setSelectedRows([]);
    }
  };

  const handleRowSelect = (idx: number) => {
    setSelectedRows((prev) =>
      prev.includes(idx) ? prev.filter((i) => i !== idx) : [...prev, idx]
    );
  };

  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/reports/monthly-matrix" className="hover:text-[#1769E8] transition-colors">
            Reports & Analytics
          </Link>
          <span>&gt;</span>
          <span className="text-[#071A4D] font-semibold">Semester-wise Attendance Report</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">
              Semester-wise Attendance Report
            </h1>
            <p className="text-[15px] text-[#64748B] mt-1 font-normal">
              Semester cohort macro trends, batch comparative statistics, and retention ratios.
            </p>
          </div>

          <div className="flex items-center gap-3">
            <button
              onClick={() => toast.success("Exporting data 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 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={() => toast.info("Opening Export Semester Report dialog...")}
              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>+ Export Semester Report</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 md:grid-cols-12 gap-3.5 items-end">
          <div className="md:col-span-10">
            <label className="block text-[11px] font-semibold text-[#64748B] uppercase tracking-wider mb-1.5">
              Search Records
            </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 records, codes, titles or names..."
                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="md:col-span-2 flex items-center gap-2">
            <button
              onClick={() => toast.success(`Found ${filteredRows.length} matching records`)}
              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={() => setSearchQuery("")}
              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. Data 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">
            <h2 className="font-heading font-bold text-lg text-[#071A4D]">
              Semester-wise Attendance Report ({filteredRows.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 === filteredRows.length && filteredRows.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="px-4 py-3 text-left font-semibold text-[#071A4D]">Academic Cohort</th>
                  <th className="px-4 py-3 text-left font-semibold text-[#071A4D]">Academic Session</th>
                  <th className="px-4 py-3 text-left font-semibold text-[#071A4D]">Total Enrolled</th>
                  <th className="px-4 py-3 text-left font-semibold text-[#071A4D]">Total Sessions Held</th>
                  <th className="px-4 py-3 text-left font-semibold text-[#071A4D]">Cohort Avg Attendance %</th>
                  <th className="px-4 py-3 text-left font-semibold text-[#071A4D]">Eligible for APR</th>
                  <th className="px-4 py-3 text-left font-semibold text-[#071A4D]">Debarred %</th>
                <th className="py-3 px-4 font-bold text-[#071A4D] text-right">Actions</th>
              </tr>
            </thead>
            <tbody className="divide-y divide-[#E5EAF0]">
              <tr key={0} className="border-b border-[#E5EAF0] hover:bg-slate-50/80 transition-colors">
                    <td className="px-4 py-3 font-semibold text-[#071A4D] whitespace-nowrap">Semester I (Batch 2026-29)</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">Odd Session 2026-27</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">156 Students</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">312 Sessions</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">92.40%</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">144 Students (92.3%)</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">2.5%</td>
                    <td className="px-4 py-3 text-right">
                      <div className="flex items-center justify-end gap-1.5">
                        <button
                          onClick={() => toast.info("Viewing details...")}
                          className="p-1 rounded text-slate-400 hover:text-[#071A4D] hover:bg-slate-100 transition-colors cursor-pointer"
                          title="View Details"
                        >
                          <Eye className="w-3.5 h-3.5" />
                        </button>
                        <button
                          onClick={() => toast.info("Edit record...")}
                          className="p-1 rounded text-slate-400 hover:text-[#071A4D] hover:bg-slate-100 transition-colors cursor-pointer"
                          title="Edit Record"
                        >
                          <Edit2 className="w-3.5 h-3.5" />
                        </button>
                      </div>
                    </td>
                  </tr>
                <tr key={1} className="border-b border-[#E5EAF0] hover:bg-slate-50/80 transition-colors">
                    <td className="px-4 py-3 font-semibold text-[#071A4D] whitespace-nowrap">Semester III (Batch 2025-28)</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">Odd Session 2026-27</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">142 Students</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">340 Sessions</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">91.80%</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">128 Students (90.1%)</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">2.8%</td>
                    <td className="px-4 py-3 text-right">
                      <div className="flex items-center justify-end gap-1.5">
                        <button
                          onClick={() => toast.info("Viewing details...")}
                          className="p-1 rounded text-slate-400 hover:text-[#071A4D] hover:bg-slate-100 transition-colors cursor-pointer"
                          title="View Details"
                        >
                          <Eye className="w-3.5 h-3.5" />
                        </button>
                        <button
                          onClick={() => toast.info("Edit record...")}
                          className="p-1 rounded text-slate-400 hover:text-[#071A4D] hover:bg-slate-100 transition-colors cursor-pointer"
                          title="Edit Record"
                        >
                          <Edit2 className="w-3.5 h-3.5" />
                        </button>
                      </div>
                    </td>
                  </tr>
                <tr key={2} className="border-b border-[#E5EAF0] hover:bg-slate-50/80 transition-colors">
                    <td className="px-4 py-3 font-semibold text-[#071A4D] whitespace-nowrap">Semester V (Batch 2024-27)</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">Odd Session 2026-27</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">138 Students</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">360 Sessions</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">93.50%</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">130 Students (94.2%)</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">1.4%</td>
                    <td className="px-4 py-3 text-right">
                      <div className="flex items-center justify-end gap-1.5">
                        <button
                          onClick={() => toast.info("Viewing details...")}
                          className="p-1 rounded text-slate-400 hover:text-[#071A4D] hover:bg-slate-100 transition-colors cursor-pointer"
                          title="View Details"
                        >
                          <Eye className="w-3.5 h-3.5" />
                        </button>
                        <button
                          onClick={() => toast.info("Edit record...")}
                          className="p-1 rounded text-slate-400 hover:text-[#071A4D] hover:bg-slate-100 transition-colors cursor-pointer"
                          title="Edit Record"
                        >
                          <Edit2 className="w-3.5 h-3.5" />
                        </button>
                      </div>
                    </td>
                  </tr>
                <tr key={3} className="border-b border-[#E5EAF0] hover:bg-slate-50/80 transition-colors">
                    <td className="px-4 py-3 font-semibold text-[#071A4D] whitespace-nowrap">Diploma Food Prod (2026)</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">Academic Year 2026-27</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">45 Students</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">240 Sessions</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">90.10%</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">39 Students (86.6%)</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">4.4%</td>
                    <td className="px-4 py-3 text-right">
                      <div className="flex items-center justify-end gap-1.5">
                        <button
                          onClick={() => toast.info("Viewing details...")}
                          className="p-1 rounded text-slate-400 hover:text-[#071A4D] hover:bg-slate-100 transition-colors cursor-pointer"
                          title="View Details"
                        >
                          <Eye className="w-3.5 h-3.5" />
                        </button>
                        <button
                          onClick={() => toast.info("Edit record...")}
                          className="p-1 rounded text-slate-400 hover:text-[#071A4D] hover:bg-slate-100 transition-colors cursor-pointer"
                          title="Edit Record"
                        >
                          <Edit2 className="w-3.5 h-3.5" />
                        </button>
                      </div>
                    </td>
                  </tr>
                <tr key={4} className="border-b border-[#E5EAF0] hover:bg-slate-50/80 transition-colors">
                    <td className="px-4 py-3 font-semibold text-[#071A4D] whitespace-nowrap">Diploma F&amp;B Service (2026)</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">Academic Year 2026-27</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">40 Students</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">240 Sessions</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">88.90%</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">34 Students (85.0%)</td>
                    <td className="px-4 py-3 text-[#334155] text-xs whitespace-nowrap">5.0%</td>
                    <td className="px-4 py-3 text-right">
                      <div className="flex items-center justify-end gap-1.5">
                        <button
                          onClick={() => toast.info("Viewing details...")}
                          className="p-1 rounded text-slate-400 hover:text-[#071A4D] hover:bg-slate-100 transition-colors cursor-pointer"
                          title="View Details"
                        >
                          <Eye className="w-3.5 h-3.5" />
                        </button>
                        <button
                          onClick={() => toast.info("Edit record...")}
                          className="p-1 rounded text-slate-400 hover:text-[#071A4D] hover:bg-slate-100 transition-colors cursor-pointer"
                          title="Edit Record"
                        >
                          <Edit2 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 {filteredRows.length} of {allRows.length} records
          </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>
    </div>
  );
}