@extends('admin.layouts.layouts')

@section('title', 'Employee Tree')

@section('content')
    <style>
        .genealogy-scroll {
            overflow-x: auto;
            padding: 20px;
        }

        .genealogy-tree {
            display: inline-block;
            text-align: center;
        }

        .genealogy-tree ul {
            padding-top: 20px;
            position: relative;
            padding-left: 0;
            display: flex;
            justify-content: center;
        }

        .genealogy-tree li {
            list-style-type: none;
            text-align: center;
            position: relative;
            padding: 20px 5px 0 5px;
        }

        .genealogy-tree li::before, .genealogy-tree li::after {
            content: '';
            position: absolute;
            top: 0;
            border-top: 2px solid #4CAF50;
            width: 50%;
            height: 20px;
        }

        .genealogy-tree li::before {
            right: 50%;
            border-right: 2px solid #4CAF50;
        }

        .genealogy-tree li::after {
            left: 50%;
            border-left: 2px solid #4CAF50;
        }

        .genealogy-tree li:only-child::before,
        .genealogy-tree li:only-child::after {
            display: none;
        }

        .genealogy-tree li:only-child {
            padding-top: 0;
        }

        .genealogy-tree li:first-child::before,
        .genealogy-tree li:last-child::after {
            border: none;
        }

        .genealogy-tree ul ul::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            border-left: 2px solid #4CAF50;
            width: 0;
            height: 20px;
        }

        .member-view-box {
            display: inline-block;
            padding: 10px 15px;
            border: 2px solid #4CAF50;
            border-radius: 8px;
            background: #e8f5e9;
            min-width: 120px;
        }

        .member-details h3 {
            margin: 0;
            font-size: 14px;
            color: #333;
        }

        .member-details p {
            margin: 2px 0 0;
            font-size: 12px;
            color: #666;
        }

    </style>
    <div class="page-header">
        <h3 class="page-title">Employee Tree</h3>
        <nav aria-label="breadcrumb">
            <ol class="breadcrumb">
                <li class="breadcrumb-item"><a href="{{ route('admin.dashboard') }}">Dashboard</a></li>
                <li class="breadcrumb-item">Employee</a></li>
                <li class="breadcrumb-item active" aria-current="page">Employee Tree</li>
            </ol>
        </nav>
    </div>

    <div class="card">
        <div class="card-body">
            @php
                function renderGenealogyTree($node) {
                    if (!$node || !isset($node['employee'])) return;

                    echo '<li>';
                    echo    '<div class="member-view-box">';
                    echo        '<div class="member-details">';
                    echo            '<h3>' . e($node['employee']->employee_name) . '</h3>';
                    echo            '<p>' . e($node['employee']->employeeDesignation->name) . '</p>';
                    echo        '</div>';
                    echo    '</div>';

                    if (!empty($node['children'])) {
                        echo '<ul>';
                        foreach ($node['children'] as $child) {
                            renderGenealogyTree($child);
                        }
                        echo '</ul>';
                    }

                    echo '</li>';
                }
            @endphp

            <div class="genealogy-body genealogy-scroll">
                <div class="genealogy-tree">
                    <ul>
                        @php renderGenealogyTree($tree); @endphp
                    </ul>
                </div>
            </div>
        </div>
    </div>
@endsection

@section('page-js')
    <script type="text/javascript">
        document.addEventListener('DOMContentLoaded', () => {
            document.querySelectorAll('.tree-children').forEach(childrenContainer => {
                const horizontal = childrenContainer.querySelector('.tree-horizontal');
                const children = childrenContainer.querySelectorAll('.tree-child');

                if (!horizontal || children.length < 2) return;

                const containerRect = childrenContainer.getBoundingClientRect();
                const firstChildRect = children[0].getBoundingClientRect();
                const lastChildRect = children[children.length - 1].getBoundingClientRect();

                const firstCenter = (firstChildRect.left - containerRect.left) + firstChildRect.width / 2;
                const lastCenter = (lastChildRect.left - containerRect.left) + lastChildRect.width / 2;

                horizontal.style.left = `${firstCenter}px`;
                horizontal.style.width = `${lastCenter - firstCenter}px`;
            });
        });

    </script>
    <script src="{{ asset('assets/js/admin/employee-master.js') }}"></script>
@endsection