@php
    /** @var \Illuminate\Support\Collection|\Illuminate\Database\Eloquent\Collection $messages */
    $messages = $messages ?? collect();
    $users = $users ?? collect();
    $responsibleUserIds = array_map('intval', $responsibleUserIds ?? []);
    $contextKey = $contextKey ?? 'chat';
    $title = $title ?? 'Чат';
    $submitLabel = $submitLabel ?? 'Отправить';
    $canSendNotifications = hasRole('admin,manager');
    $notificationValue = old('notification_type', \App\Models\ChatMessage::NOTIFICATION_NONE);
    $selectedTargetUserIds = collect(old('target_user_ids', []))
        ->map(static fn ($id) => (int) $id)
        ->filter()
        ->unique()
        ->values()
        ->all();
@endphp

<div class="chat-block mt-3" data-chat-block data-context-key="{{ $contextKey }}">
    <hr>
    <h5>{{ $title }}</h5>

    <div class="chat-card">
        <div class="chat-messages-wrap">
            <div class="chat-messages" data-chat-messages>
                @forelse($messages as $message)
                    <div class="chat-message">
                        <div class="chat-message-header">
                            <div>
                                <strong>{{ $message->user?->name ?? 'Пользователь' }}</strong>
                                @if($message->notification_type === \App\Models\ChatMessage::NOTIFICATION_USER && $message->targetUser)
                                    <span class="text-muted">для {{ $message->targetUser->name }}</span>
                                @elseif($message->notification_type === \App\Models\ChatMessage::NOTIFICATION_RESPONSIBLES)
                                    <span class="badge text-bg-light border">Уведомления: админы/менеджер/бригадир</span>
                                @elseif($message->notification_type === \App\Models\ChatMessage::NOTIFICATION_ALL)
                                    <span class="badge text-bg-light border">Уведомления: выбранные получатели</span>
                                @endif
                            </div>
                            <small class="text-muted">{{ $message->created_at?->format('d.m.Y H:i') }}</small>
                        </div>

                        @if(!empty($message->message))
                            <div class="chat-message-text">{{ $message->message }}</div>
                        @endif

                        @if($message->files->isNotEmpty())
                            <div class="chat-message-files">
                                @foreach($message->files as $file)
                                    @if(\Illuminate\Support\Str::startsWith((string) $file->mime_type, 'image/'))
                                        <a href="{{ $file->link }}" target="_blank" data-toggle="lightbox" data-gallery="chat-{{ $contextKey }}" data-size="fullscreen">
                                            <img src="{{ $file->link }}" alt="{{ $file->original_name }}" class="img-thumbnail">
                                        </a>
                                    @else
                                        <a href="{{ $file->link }}" target="_blank" class="btn btn-sm btn-outline-secondary">
                                            <i class="bi bi-paperclip"></i> {{ $file->original_name }}
                                        </a>
                                    @endif
                                @endforeach
                            </div>
                        @endif
                    </div>
                @empty
                    <div class="text-muted px-1">Сообщений пока нет.</div>
                @endforelse
            </div>

            <button type="button" class="btn btn-primary btn-sm chat-scroll-bottom d-none" data-chat-scroll-bottom>
                <i class="bi bi-arrow-down"></i>
            </button>
        </div>
    </div>

    <form action="{{ $action }}" method="post" enctype="multipart/form-data" class="mt-3" data-chat-form>
        @csrf

        <div class="row g-2 align-items-start">
            <div class="col-12 col-lg-5">
                <label class="form-label" for="chat-message-{{ $contextKey }}">Сообщение</label>
                <textarea
                    class="form-control"
                    id="chat-message-{{ $contextKey }}"
                    name="message"
                    rows="3"
                    placeholder="Введите сообщение"
                >{{ old('message') }}</textarea>
            </div>

            <div class="col-12 col-md-4 col-lg-3">
                <label class="form-label" for="chat-notification-{{ $contextKey }}">Уведомление</label>
                <select
                    class="form-select chat-notification-type"
                    id="chat-notification-{{ $contextKey }}"
                    name="notification_type"
                    data-chat-context-key="{{ $contextKey }}"
                    @disabled(!$canSendNotifications)
                >
                    <option value="{{ \App\Models\ChatMessage::NOTIFICATION_NONE }}" @selected($notificationValue === \App\Models\ChatMessage::NOTIFICATION_NONE)>Нет</option>
                    @if($canSendNotifications)
                        <option value="{{ \App\Models\ChatMessage::NOTIFICATION_RESPONSIBLES }}" @selected($notificationValue === \App\Models\ChatMessage::NOTIFICATION_RESPONSIBLES)>Админы, менеджер, бригадир</option>
                        <option value="{{ \App\Models\ChatMessage::NOTIFICATION_ALL }}" @selected($notificationValue === \App\Models\ChatMessage::NOTIFICATION_ALL)>Все</option>
                    @endif
                </select>
                @if(!$canSendNotifications)
                    <input type="hidden" name="notification_type" value="{{ \App\Models\ChatMessage::NOTIFICATION_NONE }}">
                @endif
            </div>

            <div class="col-12 col-md-4 col-lg-2">
                <label class="form-label" for="chat-attachments-{{ $contextKey }}">Файлы</label>
                <input class="form-control" id="chat-attachments-{{ $contextKey }}" type="file" name="attachments[]" multiple>
            </div>

            <div class="col-12">
                <div class="row g-2 align-items-center {{ $canSendNotifications && $notificationValue !== \App\Models\ChatMessage::NOTIFICATION_NONE ? '' : 'd-none' }}"
                     data-chat-recipient-picker-wrap>
                    <div class="col-12 col-md-auto">
                        <button
                            type="button"
                            class="btn btn-outline-secondary btn-sm"
                            data-chat-open-recipient-modal
                            data-bs-toggle="modal"
                            data-bs-target="#chatRecipientsModal-{{ $contextKey }}"
                        >
                            Выбрать получателей
                        </button>
                    </div>
                    <div class="col-12 col-md">
                        <div class="small text-muted chat-recipient-summary" data-chat-recipient-summary>
                            Получатели не выбраны
                        </div>
                    </div>
                </div>
                <div data-chat-hidden-targets>
                    @foreach($selectedTargetUserIds as $selectedTargetUserId)
                        <input type="hidden" name="target_user_ids[]" value="{{ $selectedTargetUserId }}">
                    @endforeach
                </div>
            </div>

            <div class="col-12 text-end">
                <button class="btn btn-primary btn-sm" type="submit">{{ $submitLabel }}</button>
            </div>
        </div>
    </form>

    @if($canSendNotifications)
        <div class="modal fade" id="chatRecipientsModal-{{ $contextKey }}" tabindex="-1" aria-labelledby="chatRecipientsModalLabel-{{ $contextKey }}" aria-hidden="true">
            <div class="modal-dialog modal-dialog-scrollable">
                <div class="modal-content">
                    <div class="modal-header">
                        <h1 class="modal-title fs-5" id="chatRecipientsModalLabel-{{ $contextKey }}">Получатели уведомления</h1>
                        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Закрыть"></button>
                    </div>
                    <div class="modal-body" data-chat-recipient-modal-body>
                        <div class="d-flex justify-content-between align-items-center gap-2 mb-2 flex-wrap">
                            <div class="small text-muted" data-chat-recipient-hint></div>
                            <div class="d-flex gap-2">
                                <button type="button" class="btn btn-sm btn-outline-primary" data-chat-check-visible>Выбрать видимых</button>
                                <button type="button" class="btn btn-sm btn-outline-secondary" data-chat-uncheck-visible>Снять видимые</button>
                            </div>
                        </div>

                        <div class="chat-recipient-list">
                            @foreach($users as $userId => $userName)
                                <label class="form-check mb-2 chat-recipient-item"
                                       data-chat-recipient-item
                                       data-user-id="{{ $userId }}"
                                       data-user-name="{{ $userName }}"
                                       data-chat-responsible="{{ in_array((int) $userId, $responsibleUserIds, true) ? '1' : '0' }}">
                                    <input
                                        class="form-check-input"
                                        type="checkbox"
                                        value="{{ $userId }}"
                                        data-chat-recipient-checkbox
                                        @checked(in_array((int) $userId, $selectedTargetUserIds, true))
                                    >
                                    <span class="form-check-label">{{ $userName }}</span>
                                </label>
                            @endforeach
                        </div>
                    </div>
                    <div class="modal-footer">
                        <button type="button" class="btn btn-outline-secondary btn-sm" data-bs-dismiss="modal">Закрыть</button>
                        <button type="button" class="btn btn-primary btn-sm" data-chat-apply-recipients data-bs-dismiss="modal">Применить</button>
                    </div>
                </div>
            </div>
        </div>
    @endif
</div>

@once
    @push('scripts')
        <script type="module">
            function initChatBlock(block) {
                const messages = block.querySelector('[data-chat-messages]');
                const scrollButton = block.querySelector('[data-chat-scroll-bottom]');
                const form = block.querySelector('[data-chat-form]');
                const notificationType = block.querySelector('.chat-notification-type');
                const recipientPickerWrap = block.querySelector('[data-chat-recipient-picker-wrap]');
                const hiddenTargets = block.querySelector('[data-chat-hidden-targets]');
                const summary = block.querySelector('[data-chat-recipient-summary]');
                const modal = block.querySelector('.modal');

                const scrollToBottom = (force = false) => {
                    if (!messages) {
                        return;
                    }

                    const isNearBottom = messages.scrollHeight - messages.scrollTop - messages.clientHeight < 48;
                    if (force || isNearBottom) {
                        messages.scrollTop = messages.scrollHeight;
                    }
                };

                const syncScrollButton = () => {
                    if (!messages || !scrollButton) {
                        return;
                    }

                    const shouldShow = messages.scrollHeight - messages.scrollTop - messages.clientHeight > 80;
                    scrollButton.classList.toggle('d-none', !shouldShow);
                };

                const getSelectedIds = () => Array.from(hiddenTargets.querySelectorAll('input[name="target_user_ids[]"]'))
                    .map((input) => Number(input.value))
                    .filter((value) => value > 0);

                const setSelectedIds = (ids) => {
                    hiddenTargets.innerHTML = '';
                    ids.forEach((id) => {
                        const input = document.createElement('input');
                        input.type = 'hidden';
                        input.name = 'target_user_ids[]';
                        input.value = String(id);
                        hiddenTargets.appendChild(input);
                    });
                };

                const visibleRecipientItems = () => Array.from(block.querySelectorAll('[data-chat-recipient-item]'))
                    .filter((item) => !item.hidden);

                const syncRecipientSummary = () => {
                    if (!summary || !notificationType) {
                        return;
                    }

                    if (notificationType.value === 'none') {
                        summary.textContent = 'Уведомления выключены';
                        return;
                    }

                    const selectedIds = getSelectedIds();
                    if (!selectedIds.length) {
                        summary.textContent = 'Получатели не выбраны';
                        return;
                    }

                    const names = selectedIds
                        .map((id) => block.querySelector('[data-chat-recipient-item][data-user-id="' + id + '"]'))
                        .filter(Boolean)
                        .map((item) => item.dataset.userName);

                    summary.textContent = 'Выбрано: ' + names.join(', ');
                };

                const applyRecipientFilter = (preserveSelection = true) => {
                    if (!notificationType || !modal) {
                        return;
                    }

                    const isResponsibles = notificationType.value === 'responsibles';
                    const isAll = notificationType.value === 'all';
                    const recipientItems = Array.from(block.querySelectorAll('[data-chat-recipient-item]'));
                    const selectedIds = new Set(getSelectedIds());
                    const visibleIds = [];

                    recipientItems.forEach((item) => {
                        const isResponsible = item.dataset.chatResponsible === '1';
                        const visible = isAll || (isResponsibles && isResponsible);
                        const checkbox = item.querySelector('[data-chat-recipient-checkbox]');

                        item.hidden = !visible;
                        checkbox.disabled = !visible;

                        if (visible) {
                            visibleIds.push(Number(item.dataset.userId));
                        } else {
                            checkbox.checked = false;
                        }
                    });

                    if (!preserveSelection) {
                        recipientItems.forEach((item) => {
                            const checkbox = item.querySelector('[data-chat-recipient-checkbox]');
                            if (!checkbox.disabled) {
                                checkbox.checked = true;
                            }
                        });
                    } else {
                        recipientItems.forEach((item) => {
                            const checkbox = item.querySelector('[data-chat-recipient-checkbox]');
                            checkbox.checked = !checkbox.disabled && selectedIds.has(Number(item.dataset.userId));
                        });

                        const hasVisibleSelected = recipientItems.some((item) => {
                            const checkbox = item.querySelector('[data-chat-recipient-checkbox]');
                            return !checkbox.disabled && checkbox.checked;
                        });

                        if (!hasVisibleSelected && visibleIds.length) {
                            recipientItems.forEach((item) => {
                                const checkbox = item.querySelector('[data-chat-recipient-checkbox]');
                                if (!checkbox.disabled) {
                                    checkbox.checked = true;
                                }
                            });
                        }
                    }

                    const hint = block.querySelector('[data-chat-recipient-hint]');
                    if (hint) {
                        hint.textContent = isResponsibles
                            ? 'Доступны только админы, менеджер и бригадир текущей сущности.'
                            : 'Доступны все пользователи.';
                    }
                };

                const commitRecipientSelection = () => {
                    if (!notificationType || notificationType.value === 'none') {
                        setSelectedIds([]);
                        syncRecipientSummary();
                        return;
                    }

                    const ids = visibleRecipientItems()
                        .map((item) => item.querySelector('[data-chat-recipient-checkbox]'))
                        .filter((checkbox) => checkbox && checkbox.checked)
                        .map((checkbox) => Number(checkbox.value))
                        .filter((value) => value > 0);

                    setSelectedIds(ids);
                    syncRecipientSummary();
                };

                if (messages) {
                    requestAnimationFrame(() => {
                        scrollToBottom(true);
                        syncScrollButton();
                    });
                    setTimeout(() => {
                        scrollToBottom(true);
                        syncScrollButton();
                    }, 150);
                    messages.addEventListener('scroll', syncScrollButton);
                }

                if (scrollButton) {
                    scrollButton.addEventListener('click', () => scrollToBottom(true));
                }

                if (notificationType) {
                    notificationType.addEventListener('change', (event) => {
                        const enabled = event.target.value !== 'none';

                        if (recipientPickerWrap) {
                            recipientPickerWrap.classList.toggle('d-none', !enabled);
                        }

                        if (!enabled) {
                            setSelectedIds([]);
                            syncRecipientSummary();
                            return;
                        }

                        applyRecipientFilter(false);
                        commitRecipientSelection();

                        if (modal) {
                            bootstrap.Modal.getOrCreateInstance(modal).show();
                        }
                    });
                }

                block.querySelector('[data-chat-open-recipient-modal]')?.addEventListener('click', () => {
                    applyRecipientFilter(true);
                });

                block.querySelector('[data-chat-check-visible]')?.addEventListener('click', () => {
                    visibleRecipientItems().forEach((item) => {
                        const checkbox = item.querySelector('[data-chat-recipient-checkbox]');
                        if (checkbox) {
                            checkbox.checked = true;
                        }
                    });
                });

                block.querySelector('[data-chat-uncheck-visible]')?.addEventListener('click', () => {
                    visibleRecipientItems().forEach((item) => {
                        const checkbox = item.querySelector('[data-chat-recipient-checkbox]');
                        if (checkbox) {
                            checkbox.checked = false;
                        }
                    });
                });

                block.querySelector('[data-chat-apply-recipients]')?.addEventListener('click', commitRecipientSelection);
                modal?.addEventListener('hidden.bs.modal', () => {
                    if (notificationType && notificationType.value !== 'none') {
                        commitRecipientSelection();
                    }
                });

                form?.addEventListener('submit', () => {
                    if (notificationType && notificationType.value !== 'none') {
                        commitRecipientSelection();
                    }
                });

                applyRecipientFilter(true);
                if (notificationType && notificationType.value !== 'none') {
                    commitRecipientSelection();
                } else {
                    syncRecipientSummary();
                }
            }

            document.querySelectorAll('[data-chat-block]').forEach(initChatBlock);
        </script>
    @endpush
@endonce