@extends("layouts.admin")

@section("content")
<div class="container mx-auto px-4 py-6">
    <div class="flex justify-between items-center mb-6">
        <h1 class="text-3xl font-bold text-gray-800 dark:text-gray-100">Modules</h1>
        <x-ui.button variant="save" href="{{ route('admin.modules.create') }}">
            Add New Module
        </x-ui.button>
    </div>

    @if (session("success"))
        <x-ui.feedback.alert type="success">
            <strong class="font-bold">Success!</strong>
            <span class="block sm:inline">{{ session("success") }}</span>
        </x-ui.feedback.alert>
    @endif

    <x-ui.layout.card>
        <div class="overflow-x-auto">
            <div class="min-w-full inline-block align-middle">
                @if($modulesByTier->isEmpty())
                    <p class="text-gray-700 dark:text-gray-300 p-6">No modules found. <a href="{{ route('admin.modules.create') }}" class="text-blue-500 hover:underline">Add one now</a>.</p>
                @else
                    @foreach ($modulesByTier as $tierId => $tierModules)
                        @php
                            $tier = $tierModules->first()->tier; // Get the tier object from the first module
                        @endphp
                        <h2 class="text-2xl font-semibold text-gray-700 dark:text-gray-200 px-6 py-4 bg-gray-100 dark:bg-gray-750 rounded-t-lg mt-6 border-b border-gray-200 dark:border-gray-700">{{ $tier ? $tier->name : "Uncategorized" }}</h2>
                        <x-ui.data.table :headers="['Order', 'Name', 'Description', '']">
                            <tbody class="sortable-list" data-tier-id="{{ $tierId }}">
                                @forelse ($tierModules->sortBy("order") as $module)
                                    <tr data-id="{{ $module->id }}">
                                        <td class="px-6 py-4 whitespace-nowrap text-sm text-gray-500 dark:text-gray-400 cursor-move sort-handle">{{ $module->order }}</td>
                                        <td class="px-6 py-4 whitespace-nowrap text-sm font-medium text-gray-900 dark:text-gray-100">{{ $module->name }}</td>
                                        <td class="px-6 py-4 text-sm text-gray-500 dark:text-gray-400 prose-custom dark:prose-invert max-w-xs truncate">{!! $module->description !!}</td>
                                        <td class="px-6 py-4 whitespace-nowrap text-right text-sm font-medium">
                                            <x-ui.button-group align="end">
                                                <x-ui.button variant="view" size="sm" href="{{ route('learning.module.show', $module) }}">
                                                    View
                                                </x-ui.button>
                                                <x-ui.button variant="edit" size="sm" href="{{ route('admin.modules.edit', $module) }}">
                                                    Edit
                                                </x-ui.button>
                                                <x-ui.button variant="analytics" size="sm" href="{{ route('admin.assessments.index', ['module' => $module->id]) }}">
                                                    Manage Assessment
                                                </x-ui.button>
                                                <x-ui.button 
                                                    variant="delete" 
                                                    size="sm" 
                                                    method="DELETE" 
                                                    action="{{ route('admin.modules.destroy', $module) }}"
                                                    confirm="Are you sure you want to delete this module?"
                                                >
                                                    Delete
                                                </x-ui.button>
                                            </x-ui.button-group>
                                        </td>
                                    </tr>
                                @empty
                                    <tr>
                                        <td colspan="4" class="px-6 py-4 text-sm text-gray-500 dark:text-gray-400 text-center">No modules in this tier.</td>
                                    </tr>
                                @endforelse
                            </tbody>
                        </x-ui.data.table>
                    @endforeach
                @endif
            </div>
        </div>
    </x-ui.layout.card>
</div>
@endsection

@push("scripts")
@if (Route::has("admin.modules.reorder"))
<script src="https://cdn.jsdelivr.net/npm/sortablejs@latest/Sortable.min.js"></script>
<script>
    document.addEventListener("DOMContentLoaded", function() {
        const sortableLists = document.querySelectorAll(".sortable-list");
        sortableLists.forEach(sortableList => {
            new Sortable(sortableList, {
                animation: 150,
                handle: ".sort-handle",
                ghostClass: "bg-blue-100 dark:bg-gray-700",
                onUpdate: function (evt) {
                    const tierId = evt.to.getAttribute("data-tier-id"); 
                    const order = Array.from(evt.to.children).map((row, index) => ({
                        id: row.getAttribute("data-id"),
                        order: index + 1
                    }));
                    fetch("{{ route('admin.modules.reorder') }}", {
                        method: "POST",
                        headers: {
                            "Content-Type": "application/json",
                            "X-CSRF-TOKEN": document.querySelector("meta[name='csrf-token']").getAttribute("content")
                        },
                        body: JSON.stringify({ order: order, tier_id: tierId })
                    })
                    .then(response => response.json())
                    .then(data => {
                        if(data.success) {
                            console.log("Module order updated successfully");
                            Array.from(evt.to.children).forEach((row, index) => {
                                row.querySelector(".sort-handle").textContent = index + 1;
                            });
                        } else {
                            console.error("Failed to update module order", data.message || "");
                        }
                    })
                    .catch(error => {
                        console.error("Error updating module order:", error);
                    });
                }
            });
        });
    });
</script>
@else
<script>
    document.addEventListener("DOMContentLoaded", function() {
        const sortHandles = document.querySelectorAll(".sort-handle");
        sortHandles.forEach(handle => {
            handle.style.cursor = "default";
            handle.title = "Reordering disabled";
        });
    });
</script>
@endif
@endpush