@extends('layouts.app')
@section('title', 'Редактировать заявку #' . $courseRequest->id)
@section('content')
<div class="container-fluid">
    <div class="row">
        <nav class="col-md-3 col-lg-2 d-md-block sidebar"><div class="position-sticky pt-3">@include('partials._sidebar')</div></nav>
        <main class="col-md-9 ms-sm-auto col-lg-10 px-md-4 main-content">
            <div class="d-flex justify-content-between align-items-center pt-3 pb-2 mb-3 border-bottom">
                <h1 class="h2">Редактировать заявку #{{ $courseRequest->id }}</h1>
                <a href="{{ route('admin.course-requests.show', $courseRequest) }}" class="btn btn-secondary btn-sm">Назад</a>
            </div>
            
            <form action="{{ route('admin.course-requests.update', $courseRequest) }}" method="POST" id="editRequestForm">
                @csrf
                @method('PUT')
                <div class="row">
                    <div class="col-md-8 mb-4">
                        <div class="card shadow-sm">
                            <div class="card-header bg-primary text-white d-flex justify-content-between align-items-center">
                                <h5 class="mb-0">Элементы заявки</h5>
                                <button type="button" class="btn btn-sm btn-light" data-bs-toggle="modal" data-bs-target="#addElementModal">
                                    <i class="bi bi-plus-lg"></i> Добавить элемент
                                </button>
                            </div>
                            <div class="card-body">
                                <div id="items-container">
                                    <!-- Сюда добавляются элементы -->
                                </div>
                                <input type="hidden" name="items_json" id="items_json" value="[]">
                                @error('items_json')<div class="invalid-feedback d-block">{{ $message }}</div>@enderror
                            </div>
                        </div>
                    </div>
                    
                    <div class="col-md-4 mb-4">
                        <div class="card shadow-sm">
                            <div class="card-header bg-success text-white"><h5 class="mb-0">Дополнительно</h5></div>
                            <div class="card-body">
                                <div class="mb-3">
                                    <label class="form-label">Заметка</label>
                                    <textarea name="note" class="form-control" rows="4">{{ old('note', $courseRequest->note) }}</textarea>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
                
                <button type="submit" class="btn btn-primary">Сохранить изменения</button>
                <a href="{{ route('admin.course-requests.show', $courseRequest) }}" class="btn btn-secondary">Отмена</a>
            </form>
        </main>
    </div>
</div>

<!-- Modal добавления элемента -->
<div class="modal fade" id="addElementModal" tabindex="-1">
    <div class="modal-dialog modal-lg">
        <div class="modal-content">
            <div class="modal-header">
                <h5 class="modal-title">Добавить элемент заявки</h5>
                <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
            </div>
            <div class="modal-body">
                <form id="addElementForm">
                    <div class="row g-3">
                        <div class="col-md-12">
                            <label class="form-label">Курс *</label>
                            <select id="element_course_id" class="form-select" required></select>
                        </div>
                        <div class="col-md-4">
                            <label class="form-label">Организация</label>
                            <select id="element_organization_id" class="form-select"></select>
                            <small class="text-muted">И</small>
                        </div>
                        <div class="col-md-4">
                            <label class="form-label">Группа</label>
                            <div id="element_group_ids"></div>
                            <small class="text-muted">И</small>
                        </div>
                        <div class="col-md-4">
                            <label class="form-label">Пользователь</label>
                            <div id="element_user_ids"></div>
                        </div>
                        <div class="col-md-6">
                            <label class="form-label">Дата начала *</label>
                            <input type="date" id="element_start_date" class="form-control" required>
                        </div>
                        <div class="col-md-6">
                            <label class="form-label">Дата окончания</label>
                            <input type="date" id="element_end_date" class="form-control">
                        </div>
                    </div>
                </form>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Отмена</button>
                <button type="button" class="btn btn-primary" id="addElementBtn">Добавить в заявку</button>
            </div>
        </div>
    </div>
</div>

@push('scripts')
<link href="https://cdn.jsdelivr.net/npm/tom-select@2.3.1/dist/css/tom-select.css" rel="stylesheet">
<script src="https://cdn.jsdelivr.net/npm/tom-select@2.3.1/dist/js/tom-select.complete.min.js"></script>
<script>
// Данные элементов
let items = @json($courseRequest->items->map(fn($item) => [
    'id' => $item->id,
    'course_id' => $item->course_id,
    'course_name' => $item->course->title,
    'organization_id' => $item->organization_id,
    'organization_name' => $item->organization?->name,
    'group_ids' => $item->group_id ? [$item->group_id] : [],
    'group_names' => $item->group_id ? [$item->group->name] : [],
    'user_ids' => $item->user_id ? [$item->user_id] : [],
    'user_names' => $item->user_id ? [$item->user->name] : [],
    'start_date' => $item->start_date->format('Y-m-d'),
    'end_date' => $item->end_date?->format('Y-m-d')
]) ?? []);

let elementCounter = items.length;
let courseSelect, orgSelect, groupTags, userTags;

// Инициализация TomSelect при открытии modal
document.getElementById('addElementModal').addEventListener('show.bs.modal', function() {
    if (!courseSelect) {
        courseSelect = new TomSelect('#element_course_id', {
            valueField: 'id', labelField: 'text', searchField: 'text',
            placeholder: 'Выберите курс...', preload: false,
            load: function(query, callback) {
                if (query.length < 2) return callback();
                fetch('/api/courses/search?q=' + encodeURIComponent(query))
                    .then(response => response.json()).then(json => callback(json)).catch(() => callback());
            }
        });
    }
    if (!orgSelect) {
        orgSelect = new TomSelect('#element_organization_id', {
            valueField: 'id', labelField: 'text', searchField: 'text',
            placeholder: 'Не выбрано', preload: false,
            load: function(query, callback) {
                if (query.length < 2) return callback();
                fetch('/api/organizations/search?q=' + encodeURIComponent(query))
                    .then(response => response.json()).then(json => callback(json)).catch(() => callback());
            }
        });
    }
    if (!groupTags) {
        groupTags = new TomSelect('#element_group_ids', {
            valueField: 'id', labelField: 'text', searchField: 'text',
            placeholder: 'Выберите группы...', preload: false,
            load: function(query, callback) {
                if (query.length < 2) return callback();
                fetch('/api/groups/search?q=' + encodeURIComponent(query))
                    .then(response => response.json()).then(json => callback(json)).catch(() => callback());
            }
        });
    }
    if (!userTags) {
        userTags = new TomSelect('#element_user_ids', {
            valueField: 'id', labelField: 'text', searchField: 'text',
            placeholder: 'Выберите пользователей...', preload: false,
            load: function(query, callback) {
                if (query.length < 2) return callback();
                fetch('/api/users/search?q=' + encodeURIComponent(query))
                    .then(response => response.json()).then(json => callback(json)).catch(() => callback());
            }
        });
    }
});

document.getElementById('addElementModal').addEventListener('hidden.bs.modal', function() {
    if (courseSelect) courseSelect.clear();
    if (orgSelect) orgSelect.clear();
    if (groupTags) groupTags.clear();
    if (userTags) userTags.clear();
    document.getElementById('element_start_date').value = '';
    document.getElementById('element_end_date').value = '';
});

document.getElementById('addElementBtn').addEventListener('click', function() {
    const courseId = courseSelect.getValue();
    const organizationId = orgSelect.getValue();
    const groupIds = groupTags.getValue();
    const userIds = userTags.getValue();
    const startDate = document.getElementById('element_start_date').value;
    const endDate = document.getElementById('element_end_date').value;
    
    if (!courseId) { alert('Выберите курс'); return; }
    if (!startDate) { alert('Укажите дату начала'); return; }
    
    items.push({
        id: elementCounter++,
        course_id: courseId,
        course_name: courseSelect.options[courseId]?.text || 'Курс',
        organization_id: organizationId || null,
        organization_name: organizationId ? orgSelect.options[organizationId]?.text : null,
        group_ids: Array.isArray(groupIds) ? groupIds : (groupIds ? [groupIds] : []),
        group_names: Array.isArray(groupIds) ? groupIds.map(id => groupTags.options[id]?.text) : (groupIds ? [groupTags.options[groupIds]?.text] : []),
        user_ids: Array.isArray(userIds) ? userIds : (userIds ? [userIds] : []),
        user_names: Array.isArray(userIds) ? userIds.map(id => userTags.options[id]?.text) : (userIds ? [userTags.options[userIds]?.text] : []),
        start_date: startDate,
        end_date: endDate || null
    });
    
    updateItemsDisplay();
    bootstrap.Modal.getInstance(document.getElementById('addElementModal')).hide();
});

function updateItemsDisplay() {
    const container = document.getElementById('items-container');
    document.getElementById('items_json').value = JSON.stringify(items);
    
    if (items.length === 0) {
        container.innerHTML = '<p class="text-muted text-center py-4">Нет элементов. Нажмите "Добавить элемент"</p>';
        return;
    }
    
    container.innerHTML = items.map((item, index) => {
        let recipients = [];
        if (item.organization_name) recipients.push(`<span class="badge bg-primary">${item.organization_name}</span>`);
        if (item.group_names && item.group_names.length > 0) {
            item.group_names.forEach(name => recipients.push(`<span class="badge bg-info">${name}</span>`));
        }
        if (item.user_names && item.user_names.length > 0) {
            item.user_names.forEach(name => recipients.push(`<span class="badge bg-success">${name}</span>`));
        }
        if (recipients.length === 0) recipients.push('<span class="text-muted">—</span>');
        
        return `
            <div class="border rounded p-3 mb-3 bg-light">
                <div class="d-flex justify-content-between align-items-start">
                    <div class="flex-grow-1">
                        <div class="mb-2"><strong>Курс:</strong> ${item.course_name}</div>
                        <div class="mb-2"><strong>Получатели:</strong> ${recipients.join(' ')}</div>
                        <div><strong>Даты:</strong> ${item.start_date} ${item.end_date ? '→ ' + item.end_date : ''}</div>
                    </div>
                    <button type="button" class="btn btn-sm btn-outline-danger" onclick="removeItem(${item.id})">
                        <i class="bi bi-trash"></i>
                    </button>
                </div>
            </div>
        `;
    }).join('');
}

window.removeItem = function(id) {
    items = items.filter(item => item.id !== id);
    updateItemsDisplay();
};

document.getElementById('editRequestForm').addEventListener('submit', function(e) {
    if (items.length === 0) {
        e.preventDefault();
        alert('Добавьте хотя бы один элемент');
    }
});

updateItemsDisplay();
</script>
@endpush
@endsection