@extends('layouts.app')

@section('content')
<div class="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-6">
    <div class="bg-white overflow-hidden shadow sm:rounded-lg">
        <div class="px-4 py-5 sm:px-6">
            <h3 class="text-xl leading-6 font-semibold text-gray-900">
                Edit Online Courses
            </h3>
        </div>

        <div class="px-4 py-5 sm:p-6">
            @if ($errors->any())
            <div class="bg-red-100 border border-red-400 text-red-700 px-4 py-3 rounded mb-4">
                <ul>
                    @foreach ($errors->all() as $error)
                    <li>{{ $error }}</li>
                    @endforeach
                </ul>
            </div>
            @endif

            <form action="{{ request()->is('admin/*') ? route('admin.OnlineCourses.update', $onlineCourse->id) : (request()->is('coordinator/*') ? route('coordinator.OnlineCourses.update', $onlineCourse->id) : route('faculty.OnlineCourses.update', $onlineCourse->id)) }}" method="POST" enctype="multipart/form-data">
                @csrf
                @method('PUT')
                <div class="space-y-6">
                    <!-- course Information -->
                    <div class="grid grid-cols-1 sm:grid-cols-2 gap-4">
                        <div>
                            <label for="course" class="block text-sm font-medium text-gray-700">Course Name</label>
                            <input type="text" name="course" id="course" value="{{ old('course', $onlineCourse->course) }}" class="mt-1 focus:ring-indigo-500 focus:border-indigo-500 block w-full shadow-sm sm:text-sm border-gray-300 rounded-md" required>
                        </div>
                    </div>

                    <!-- offered_by -->
                    <div>
                        <label for="offered_by" class="block text-sm font-medium text-gray-700">Offered By</label>
                        <input type="text" name="offered_by" id="offered_by" value="{{ old('offered_by', $onlineCourse->offered_by) }}" class="mt-1 focus:ring-indigo-500 focus:border-indigo-500 block w-full shadow-sm sm:text-sm border-gray-300 rounded-md" required>
                    </div>


                    <!-- Department and Faculty Name -->
                    <div class="grid grid-cols-2 sm:grid-cols-2 gap-4">
                        <div>
                            <label for="department" class="block text-sm font-medium text-gray-700">Department</label>
                            <input type="text" name="department" id="department" value="{{ $onlineCourse->department->name ?? 'Unknown' }}" class="mt-1 focus:ring-indigo-500 focus:border-indigo-500 block w-full shadow-sm sm:text-sm border-gray-300 rounded-md bg-gray-100" disabled>
                        </div>
                        <div>
                            <label for="faculty_name" class="block text-sm font-medium text-gray-700">Faculty Name</label>
                            <input type="text" name="faculty_name" id="faculty_name" value="{{ $onlineCourse->user->name ?? 'Unknown' }}" class="mt-1 focus:ring-indigo-500 focus:border-indigo-500 block w-full shadow-sm sm:text-sm border-gray-300 rounded-md bg-gray-100" disabled>
                        </div>
                    </div>

                    <div class="grid grid-cols-2 gap-4">
                        <div>
                            <label for="start_date" class="block text-sm font-medium text-gray-700">Start Date</label>
                            <input type="date" name="start_date" id="start_date" value="{{ old('start_date', \Carbon\Carbon::parse($onlineCourse->start_date)->format('Y-m-d')) }}" class="mt-1 focus:ring-indigo-500 focus:border-indigo-500 block w-full shadow-sm sm:text-sm border-gray-300 rounded-md" required onchange="calculateDays()">
                        </div>
                        <div>
                            <label for="end_date" class="block text-sm font-medium text-gray-700">End Date</label>
                            <input type="date" name="end_date" id="end_date" value="{{ old('end_date', \Carbon\Carbon::parse($onlineCourse->end_date)->format('Y-m-d')) }}" class="mt-1 focus:ring-indigo-500 focus:border-indigo-500 block w-full shadow-sm sm:text-sm border-gray-300 rounded-md" required onchange="calculateDays()">
                        </div>
                        <div>
                            <label for="num_days" class="block text-sm font-medium text-gray-700">Number of Days</label>
                            <input type="text" name="num_days" id="num_days" value="{{ old('num_days', $onlineCourse->num_days) }}" class="mt-1 focus:ring-indigo-500 focus:border-indigo-500 block w-full shadow-sm sm:text-sm border-gray-300 rounded-md bg-gray-100" readonly>
                        </div>
                    </div>

                    <!-- Proof File -->
                    <div>
                        <label for="proof" class="block text-sm font-medium text-gray-700">Upload Proof</label>
                        @if ($onlineCourse->proof)
                        <div class="mb-2">
                            <span class="text-sm text-gray-600">Current file:</span>
                            <a href="{{ asset('storage/' . $onlineCourse->proof) }}" target="_blank" class="ml-2 text-blue-600 hover:text-blue-800">View</a>
                        </div>
                        @endif
                        <input type="file" name="proof" id="proof" class="mt-1 block w-full text-sm text-gray-500
                            file:mr-4 file:py-2 file:px-4
                            file:rounded-full file:border-0
                            file:text-sm file:font-semibold
                            file:bg-blue-50 file:text-blue-700
                            hover:file:bg-blue-100">
                        <p class="mt-1 text-xs text-gray-500">Accepted formats: JPG, JPEG, PNG, PDF, DOC, DOCX, ZIP</p>
                    </div>
                </div>

                <!-- Submit Button -->
                <div class="mt-6 flex items-center justify-end">
                    <a href="{{ request()->is('admin/*') ? route('admin.OnlineCoursesResponses') : (request()->is('coordinator/*') ? route('coordinator.OnlineCoursesResponses') : route('faculty.OnlineCoursesResponses')) }}" class="bg-gray-200 py-2 px-4 border border-gray-300 rounded-md shadow-sm text-sm font-medium text-gray-700 hover:bg-gray-300 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-gray-500 mr-3">
                        Cancel
                    </a>
                    <button type="submit" class="inline-flex justify-center py-2 px-4 border border-transparent text-sm font-medium rounded-md text-white bg-black">
                        Update
                    </button>
                </div>
            </form>
        </div>
    </div>
</div>

<script>
    function calculateDays() {
        const startDate = new Date(document.getElementById('start_date').value);
        const endDate = new Date(document.getElementById('end_date').value);
        if (startDate && endDate) {
            const diffTime = Math.abs(endDate - startDate);
            const numDays = Math.ceil(diffTime / (1000 * 60 * 60 * 24)) + 1; // +1 to include both start and end days
            document.getElementById('num_days').value = numDays;
        }
    }

    // Calculate days on page load
    document.addEventListener('DOMContentLoaded', function() {
        calculateDays();
    });
</script>

@endsection