@extends('layouts.dashboard')

@section('title', 'Course Registration')

@section('page-content')
<div class="space-y-6">
    <!-- Page Header -->
    <div class="flex items-center justify-between">
        <div>
            <h1 class="text-2xl font-bold text-gray-900">Course Registration</h1>
            <p class="text-gray-600 mt-1">{{ $currentYear->name }} - {{ $currentSemester->name }}</p>
        </div>
        <div class="flex items-center space-x-3">
            <a href="{{ route('courses.enrolled') }}" class="px-4 py-2 bg-white border border-gray-300 text-gray-700 rounded-lg hover:bg-gray-50">
                View Enrollment History
            </a>
        </div>
    </div>

    <!-- Credit Summary -->
    <div class="bg-gradient-to-r from-blue-600 to-indigo-700 rounded-xl shadow-sm p-6 text-white">
        <div class="flex items-center justify-between">
            <div>
                <h3 class="text-lg font-semibold">Total Credits Enrolled</h3>
                <p class="text-3xl font-bold mt-2">{{ $totalCreditsEnrolled }} / {{ $maxCredits }}</p>
                <p class="text-blue-100 text-sm mt-1">Credits for current semester</p>
            </div>
            <div class="text-right">
                <p class="text-sm text-blue-100">Courses Enrolled</p>
                <p class="text-3xl font-bold">{{ $enrolledCourses->count() }}</p>
            </div>
        </div>
        <div class="mt-4">
            <div class="w-full bg-white bg-opacity-20 rounded-full h-3">
                <div class="bg-white rounded-full h-3 transition-all" style="width: {{ min(($totalCreditsEnrolled / $maxCredits) * 100, 100) }}%"></div>
            </div>
        </div>
    </div>

    @if(session('success'))
    <div class="bg-green-50 border border-green-200 text-green-800 px-4 py-3 rounded-lg">
        {{ session('success') }}
    </div>
    @endif

    @if(session('error'))
    <div class="bg-red-50 border border-red-200 text-red-800 px-4 py-3 rounded-lg">
        {{ session('error') }}
    </div>
    @endif

    <!-- Two Column Layout -->
    <div class="grid grid-cols-1 lg:grid-cols-2 gap-6">
        <!-- Enrolled Courses -->
        <div class="bg-white rounded-xl shadow-sm p-6 border border-gray-100">
            <div class="flex items-center justify-between mb-4">
                <h2 class="text-lg font-semibold text-gray-900">Enrolled Courses</h2>
                <span class="px-3 py-1 bg-blue-100 text-blue-800 text-sm font-medium rounded-full">
                    {{ $enrolledCourses->count() }} courses
                </span>
            </div>

            @if($enrolledCourses->isEmpty())
                <div class="text-center py-12">
                    <svg class="mx-auto h-12 w-12 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M12 6.253v13m0-13C10.832 5.477 9.246 5 7.5 5S4.168 5.477 3 6.253v13C4.168 18.477 5.754 18 7.5 18s3.332.477 4.5 1.253m0-13C13.168 5.477 14.754 5 16.5 5c1.747 0 3.332.477 4.5 1.253v13C19.832 18.477 18.247 18 16.5 18c-1.746 0-3.332.477-4.5 1.253"/>
                    </svg>
                    <p class="mt-2 text-sm text-gray-500">You haven't enrolled in any courses yet</p>
                    <p class="text-xs text-gray-400 mt-1">Choose courses from the available list</p>
                </div>
            @else
                <div class="space-y-3">
                    @foreach($enrolledCourses as $enrollment)
                        <div class="border border-gray-200 rounded-lg p-4 hover:border-blue-300 transition-colors">
                            <div class="flex items-start justify-between">
                                <div class="flex-1">
                                    <div class="flex items-center space-x-2">
                                        <span class="font-mono text-sm font-bold text-blue-600">{{ $enrollment->course->code }}</span>
                                        <span class="px-2 py-0.5 bg-green-100 text-green-700 text-xs rounded-full">Enrolled</span>
                                    </div>
                                    <h4 class="font-medium text-gray-900 mt-1">{{ $enrollment->course->name }}</h4>
                                    <div class="flex items-center space-x-4 mt-2 text-xs text-gray-500">
                                        <span>{{ $enrollment->course->credit_hours }} Credits</span>
                                        <span>{{ $enrollment->course->course_type }}</span>
                                        <span>Enrolled: {{ $enrollment->enrollment_date->format('M d, Y') }}</span>
                                    </div>
                                </div>
                                <form method="POST" action="{{ route('courses.drop', $enrollment) }}" onsubmit="return confirm('Are you sure you want to drop this course?')">
                                    @csrf
                                    @method('DELETE')
                                    <button type="submit" class="text-red-600 hover:text-red-800 text-sm font-medium">
                                        Drop
                                    </button>
                                </form>
                            </div>
                        </div>
                    @endforeach
                </div>
            @endif
        </div>

        <!-- Available Courses -->
        <div class="bg-white rounded-xl shadow-sm p-6 border border-gray-100">
            <div class="flex items-center justify-between mb-4">
                <h2 class="text-lg font-semibold text-gray-900">Available Courses</h2>
                <span class="px-3 py-1 bg-gray-100 text-gray-800 text-sm font-medium rounded-full">
                    {{ $availableCourses->count() }} courses
                </span>
            </div>

            @if($availableCourses->isEmpty())
                <div class="text-center py-12">
                    <svg class="mx-auto h-12 w-12 text-gray-400" fill="none" stroke="currentColor" viewBox="0 0 24 24">
                        <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"/>
                    </svg>
                    <p class="mt-2 text-sm text-gray-500">No available courses</p>
                    <p class="text-xs text-gray-400 mt-1">You're enrolled in all program courses or max credits reached</p>
                </div>
            @else
                <div class="space-y-3 max-h-[600px] overflow-y-auto">
                    @foreach($availableCourses as $course)
                        <div class="border border-gray-200 rounded-lg p-4 hover:border-blue-300 transition-colors">
                            <div class="flex items-start justify-between">
                                <div class="flex-1">
                                    <div class="flex items-center space-x-2">
                                        <span class="font-mono text-sm font-bold text-gray-900">{{ $course->code }}</span>
                                        @if($course->prerequisites->count() > 0)
                                            <span class="px-2 py-0.5 bg-yellow-100 text-yellow-700 text-xs rounded-full">Has Prerequisites</span>
                                        @endif
                                    </div>
                                    <h4 class="font-medium text-gray-900 mt-1">{{ $course->name }}</h4>
                                    <div class="flex items-center space-x-4 mt-2 text-xs text-gray-500">
                                        <span>{{ $course->credit_hours }} Credits</span>
                                        <span>{{ $course->course_type }}</span>
                                    </div>
                                    @if($course->prerequisites->count() > 0)
                                        <div class="mt-2">
                                            <p class="text-xs text-gray-600">Prerequisites:</p>
                                            <div class="flex flex-wrap gap-1 mt-1">
                                                @foreach($course->prerequisites as $prereq)
                                                    <span class="text-xs px-2 py-0.5 bg-gray-100 text-gray-700 rounded">{{ $prereq->code }}</span>
                                                @endforeach
                                            </div>
                                        </div>
                                    @endif
                                </div>
                                <form method="POST" action="{{ route('courses.enroll') }}">
                                    @csrf
                                    <input type="hidden" name="course_id" value="{{ $course->id }}">
                                    <button type="submit" class="px-4 py-2 bg-blue-600 text-white text-sm font-medium rounded-lg hover:bg-blue-700 whitespace-nowrap">
                                        Enroll
                                    </button>
                                </form>
                            </div>
                        </div>
                    @endforeach
                </div>
            @endif
        </div>
    </div>
</div>
@endsection