@extends('admin.layouts.app', ['title' => 'Assign Merchants'])

@section('content')
    <div class="d-flex align-items-center justify-content-between flex-wrap gap-3 mb-4">
        <div>
            <h1 class="h4 mb-0">Assign Merchants</h1>
            <div class="text-muted small">Choose which merchants {{ $subAdmin->name }} can access.</div>
        </div>
        <a href="{{ route('admin.sub_admins.index') }}" class="btn btn-outline-secondary btn-sm">
            <i class="bi bi-arrow-left me-1"></i> Back to Sub Admin Roles
        </a>
    </div>

    <div class="card admin-card mb-4">
        <div class="card-body d-flex flex-wrap gap-3 justify-content-between align-items-center">
            <div>
                <div class="fw-semibold">{{ $subAdmin->name }}</div>
                <div class="text-muted small">{{ $subAdmin->email }}</div>
            </div>
            <div class="d-flex flex-wrap gap-2 align-items-center">
                <span class="badge {{ $subAdmin->is_active ? 'text-bg-success' : 'text-bg-secondary' }}">
                    {{ $subAdmin->is_active ? 'Active' : 'Inactive' }}
                </span>
                <span class="badge text-bg-light border"><span id="subAdminMerchantCount">{{ count($assignedUserIds) }} selected</span></span>
            </div>
        </div>
    </div>

    <div class="card admin-card">
        <div class="card-body">
            @if (session('status'))
                <div class="alert alert-success">{{ session('status') }}</div>
            @endif

            @if ($errors->any())
                <div class="alert alert-danger">{{ $errors->first() }}</div>
            @endif

            <form method="POST" action="{{ route('admin.sub_admins.assign.update', $subAdmin) }}">
                @csrf
                @method('PUT')

                <div class="row g-3 align-items-center mb-4">
                    <div class="col-lg-7">
                        <label for="subAdminMerchantSearch" class="form-label small text-muted mb-1">Search merchants</label>
                        <div class="position-relative">
                            <i class="bi bi-search position-absolute top-50 translate-middle-y ms-3 text-muted"></i>
                            <input type="search" id="subAdminMerchantSearch" class="form-control ps-5" placeholder="Search by merchant name, username, or email">
                        </div>
                    </div>
                    <div class="col-lg-5">
                        <div class="small text-muted mb-1">Access scope</div>
                        <div class="fw-semibold">Only selected merchants will be manageable for this sub admin.</div>
                    </div>
                </div>

                <div class="row g-3" id="subAdminMerchantGrid">
                    @forelse ($users as $user)
                        @php($isAssigned = in_array((int) $user->id, $assignedUserIds, true))
                        <div class="col-12 col-md-6 col-xl-4" data-merchant-card data-search="{{ strtolower(trim(implode(' ', array_filter([$user->name, $user->username, $user->email])))) }}">
                            <label class="card h-100 border-0 shadow-sm">
                                <div class="card-body">
                                    <div class="form-check mb-3">
                                        <input
                                            class="form-check-input sub-admin-merchant-checkbox"
                                            type="checkbox"
                                            name="assigned_user_ids[]"
                                            value="{{ $user->id }}"
                                            id="assigned_user_{{ $user->id }}"
                                            {{ $isAssigned ? 'checked' : '' }}
                                        >
                                        <label class="form-check-label fw-semibold" for="assigned_user_{{ $user->id }}">
                                            {{ $user->name }}
                                        </label>
                                    </div>

                                    <div class="small text-muted mb-2">{{ $user->email }}</div>

                                    <div class="d-flex flex-wrap gap-2">
                                        <span class="badge text-bg-light border">{{ $user->username ?: 'No username' }}</span>
                                        <span class="badge {{ $user->status ? 'text-bg-success' : 'text-bg-secondary' }}">
                                            {{ $user->status ? 'Active' : 'Inactive' }}
                                        </span>
                                    </div>
                                </div>
                            </label>
                        </div>
                    @empty
                        <div class="col-12">
                            <div class="text-center text-muted py-4">No merchants found.</div>
                        </div>
                    @endforelse
                </div>

                <div id="subAdminMerchantEmptyState" class="text-center text-muted py-4 d-none">
                    No merchants match your search.
                </div>

                <div class="d-flex justify-content-end gap-2 mt-4">
                    <a href="{{ route('admin.sub_admins.index') }}" class="btn btn-outline-secondary">Cancel</a>
                    <button type="submit" class="btn btn-primary">Save Merchant Assignment</button>
                </div>
            </form>
        </div>
    </div>
@endsection

@push('scripts')
    <script>
        document.addEventListener('DOMContentLoaded', function () {
            const searchInput = document.getElementById('subAdminMerchantSearch');
            const merchantCards = Array.from(document.querySelectorAll('[data-merchant-card]'));
            const countElement = document.getElementById('subAdminMerchantCount');
            const emptyState = document.getElementById('subAdminMerchantEmptyState');

            const updateCount = function () {
                if (!countElement) {
                    return;
                }

                const selectedCount = document.querySelectorAll('.sub-admin-merchant-checkbox:checked').length;
                countElement.textContent = selectedCount + ' selected';
            };

            const applySearch = function () {
                if (!searchInput || !emptyState) {
                    return;
                }

                const query = searchInput.value.trim().toLowerCase();
                let visibleCount = 0;

                merchantCards.forEach(function (card) {
                    const haystack = card.getAttribute('data-search') || '';
                    const shouldShow = query === '' || haystack.includes(query);

                    card.classList.toggle('d-none', !shouldShow);

                    if (shouldShow) {
                        visibleCount += 1;
                    }
                });

                emptyState.classList.toggle('d-none', visibleCount !== 0);
            };

            document.addEventListener('change', function (event) {
                if (event.target.classList.contains('sub-admin-merchant-checkbox')) {
                    updateCount();
                }
            });

            if (searchInput) {
                searchInput.addEventListener('input', applySearch);
            }

            updateCount();
            applySearch();
        });
    </script>
@endpush