@extends('layouts.app')

@section('title', 'Students Directory')
@section('page_header', 'Student Interns Directory')

@section('content')
<div class="space-y-6" x-data="{ importModalOpen: false }">

    <!-- Top Action Bar -->
    <div class="flex flex-col md:flex-row items-stretch md:items-center justify-between gap-4 bg-white p-6 rounded-3xl border border-slate-200/80 shadow-sm">
        <div>
            <h2 class="text-xl font-extrabold text-slate-900">Registered Student Interns</h2>
            <p class="text-xs text-slate-500">Filter students by college, age, course domain, or search by name</p>
        </div>

        <div class="flex items-center gap-3">
            <!-- CSV Bulk Import Trigger -->
            <button @click="importModalOpen = true" 
                    class="inline-flex items-center gap-2 bg-slate-100 hover:bg-slate-200 text-slate-700 font-bold text-xs px-4 py-2.5 rounded-xl border border-slate-200 transition-all">
                <i data-lucide="file-up" class="w-4 h-4 text-emerald-600"></i>
                <span>Bulk CSV Import</span>
            </button>

            <!-- Export Filtered CSV -->
            <a href="{{ route('admin.students.export_csv', request()->query()) }}" 
               class="inline-flex items-center gap-2 bg-slate-100 hover:bg-slate-200 text-slate-700 font-bold text-xs px-4 py-2.5 rounded-xl border border-slate-200 transition-all">
                <i data-lucide="file-down" class="w-4 h-4 text-emerald-600"></i>
                <span>Export CSV</span>
            </a>

            <!-- Add Student Button -->
            <a href="{{ route('admin.students.create') }}" 
               class="inline-flex items-center gap-2 bg-emerald-600 hover:bg-emerald-700 text-white font-bold text-xs px-4 py-2.5 rounded-xl shadow-lg shadow-emerald-600/20 transition-all">
                <i data-lucide="user-plus" class="w-4 h-4"></i>
                <span>Add New Student</span>
            </a>
        </div>
    </div>

    <!-- Filter Bar Card -->
    <div class="bg-white p-6 rounded-3xl border border-slate-200/80 shadow-sm">
        <form method="GET" action="{{ route('admin.students.index') }}" class="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-5 gap-4">
            
            <!-- Search Input -->
            <div class="lg:col-span-2 relative">
                <label class="block text-[10px] font-bold text-slate-400 uppercase tracking-wider mb-1">Search Student</label>
                <div class="relative">
                    <input type="text" name="search" value="{{ request('search') }}" 
                           placeholder="Search Name, Email, Phone, Certificate ID..." 
                           class="w-full pl-9 pr-4 py-2.5 rounded-xl border border-slate-200 bg-slate-50 text-xs font-semibold focus:bg-white focus:border-emerald-600 outline-none">
                    <i data-lucide="search" class="w-4 h-4 text-slate-400 absolute left-3 top-3"></i>
                </div>
            </div>

            <!-- College Filter -->
            <div>
                <label class="block text-[10px] font-bold text-slate-400 uppercase tracking-wider mb-1">Filter by College</label>
                <select name="college_id" onchange="this.form.submit()" class="w-full py-2.5 px-3 rounded-xl border border-slate-200 bg-slate-50 text-xs font-semibold focus:bg-white focus:border-emerald-600 outline-none">
                    <option value="">All Colleges</option>
                    @foreach($colleges as $col)
                        <option value="{{ $col->id }}" {{ request('college_id') == $col->id ? 'selected' : '' }}>
                            {{ $col->name }}
                        </option>
                    @endforeach
                </select>
            </div>

            <!-- Course Filter -->
            <div>
                <label class="block text-[10px] font-bold text-slate-400 uppercase tracking-wider mb-1">Filter by Course</label>
                <select name="course_id" onchange="this.form.submit()" class="w-full py-2.5 px-3 rounded-xl border border-slate-200 bg-slate-50 text-xs font-semibold focus:bg-white focus:border-emerald-600 outline-none">
                    <option value="">All Courses</option>
                    @foreach($courses as $crs)
                        <option value="{{ $crs->id }}" {{ request('course_id') == $crs->id ? 'selected' : '' }}>
                            {{ $crs->title }}
                        </option>
                    @endforeach
                </select>
            </div>

            <!-- Clear Filters button -->
            <div class="flex items-end gap-2">
                <button type="submit" class="flex-1 bg-emerald-600 text-white font-bold text-xs py-2.5 rounded-xl hover:bg-emerald-700 transition-colors">
                    Filter
                </button>
                @if(request()->hasAny(['search', 'college_id', 'course_id', 'min_age']))
                <a href="{{ route('admin.students.index') }}" class="p-2.5 bg-slate-100 text-slate-600 rounded-xl hover:bg-slate-200" title="Reset Filters">
                    <i data-lucide="rotate-ccw" class="w-4 h-4"></i>
                </a>
                @endif
            </div>
        </form>
    </div>

    <!-- Students Table -->
    <div class="bg-white rounded-3xl border border-slate-200/80 shadow-sm overflow-hidden">
        <div class="overflow-x-auto">
            <table class="w-full text-left text-xs">
                <thead class="bg-slate-50 text-slate-500 uppercase tracking-wider font-bold border-b border-slate-200">
                    <tr>
                        <th class="p-4">Student Name</th>
                        <th class="p-4">College</th>
                        <th class="p-4">Contact Info</th>
                        <th class="p-4">Age / Gender</th>
                        <th class="p-4 text-center">Certificates</th>
                        <th class="p-4 text-right">Actions</th>
                    </tr>
                </thead>
                <tbody class="divide-y divide-slate-100 font-medium">
                    @forelse($students as $student)
                    <tr class="hover:bg-slate-50/80 transition-colors">
                        <td class="p-4">
                            <div class="flex items-center gap-3">
                                <div class="w-9 h-9 rounded-full bg-emerald-100 text-emerald-800 font-extrabold flex items-center justify-center text-xs flex-shrink-0">
                                    {{ strtoupper(substr($student->full_name, 0, 1)) }}
                                </div>
                                <div>
                                    <a href="{{ route('admin.students.show', $student->id) }}" class="font-bold text-slate-900 hover:text-emerald-600">
                                        {{ $student->full_name }}
                                    </a>
                                    <span class="block text-[11px] text-slate-400">Added {{ $student->created_at->format('d M Y') }}</span>
                                </div>
                            </div>
                        </td>

                        <td class="p-4 text-slate-700 font-semibold">
                            {{ $student->college->name ?? 'Direct Applicant' }}
                        </td>

                        <td class="p-4 space-y-0.5">
                            <div class="text-slate-800 font-semibold">{{ $student->email ?? 'No email' }}</div>
                            <div class="text-slate-500 text-[11px]">{{ $student->phone ?? 'No phone' }}</div>
                        </td>

                        <td class="p-4 text-slate-700">
                            {{ $student->age ? $student->age . ' yrs' : 'N/A' }} 
                            @if($student->gender)
                                • <span class="text-slate-500">{{ $student->gender }}</span>
                            @endif
                        </td>

                        <td class="p-4 text-center">
                            <span class="font-extrabold text-emerald-800 bg-emerald-100 px-3 py-1 rounded-full text-xs">
                                {{ $student->certificates->count() }} Issued
                            </span>
                        </td>

                        <td class="p-4 text-right space-x-1">
                            <!-- Quick Certificate Issue -->
                            <a href="{{ route('admin.certificates.create', ['student_id' => $student->id]) }}" 
                               class="p-2 text-emerald-600 hover:bg-emerald-50 rounded-xl inline-block" title="Issue Certificate">
                                <i data-lucide="award" class="w-4 h-4"></i>
                            </a>

                            <!-- View -->
                            <a href="{{ route('admin.students.show', $student->id) }}" 
                               class="p-2 text-slate-600 hover:bg-slate-100 rounded-xl inline-block" title="View Profile">
                                <i data-lucide="eye" class="w-4 h-4"></i>
                            </a>

                            <!-- Edit -->
                            <a href="{{ route('admin.students.edit', $student->id) }}" 
                               class="p-2 text-blue-600 hover:bg-blue-50 rounded-xl inline-block" title="Edit Student">
                                <i data-lucide="edit-3" class="w-4 h-4"></i>
                            </a>
                        </td>
                    </tr>
                    @empty
                    <tr>
                        <td colspan="6" class="p-8 text-center text-slate-400">No student records found.</td>
                    </tr>
                    @endforelse
                </tbody>
            </table>
        </div>

        @if($students->hasPages())
        <div class="p-4 border-t border-slate-100">
            {{ $students->links() }}
        </div>
        @endif
    </div>

    <!-- Bulk CSV Import Modal -->
    <div x-show="importModalOpen" x-cloak class="fixed inset-0 z-50 flex items-center justify-center p-4 bg-slate-900/60 backdrop-blur-sm">
        <div class="bg-white rounded-3xl p-8 max-w-md w-full space-y-6 shadow-2xl">
            <div class="flex items-center justify-between border-b border-slate-100 pb-4">
                <h3 class="text-lg font-bold text-slate-900">Bulk Import Students via CSV</h3>
                <button @click="importModalOpen = false" class="text-slate-400 hover:text-slate-600">
                    <i data-lucide="x" class="w-5 h-5"></i>
                </button>
            </div>

            <form action="{{ route('admin.students.import_csv') }}" method="POST" enctype="multipart/form-data" class="space-y-4">
                @csrf
                <p class="text-xs text-slate-500 leading-relaxed">
                    Upload a CSV file containing columns: <span class="font-semibold text-slate-700">Full Name, Email, Phone, Age, Gender, College Name</span>.
                </p>

                <div>
                    <label class="block text-xs font-bold text-slate-700 uppercase tracking-wider mb-2">Select CSV File</label>
                    <input type="file" name="csv_file" accept=".csv, .txt" required
                           class="w-full text-xs text-slate-500 file:mr-4 file:py-2.5 file:px-4 file:rounded-xl file:border-0 file:text-xs file:font-bold file:bg-emerald-50 file:text-emerald-700 hover:file:bg-emerald-100">
                </div>

                <div class="flex items-center justify-end gap-3 pt-4 border-t border-slate-100">
                    <button type="button" @click="importModalOpen = false" class="px-4 py-2.5 rounded-xl border border-slate-200 text-xs font-bold text-slate-600 hover:bg-slate-50">
                        Cancel
                    </button>
                    <button type="submit" class="px-5 py-2.5 rounded-xl bg-emerald-600 hover:bg-emerald-700 text-white text-xs font-bold shadow-lg shadow-emerald-600/20">
                        Upload & Import
                    </button>
                </div>
            </form>
        </div>
    </div>

</div>
@endsection