@extends('layouts.app', ['path' => 'attendance.calendar'])

@section('content')
    <div class="content" data-color="primary">
        <div class="d-md-flex d-block align-items-center justify-content-between page-breadcrumb mb-3">
            <div class="my-auto mb-2">
                <h2 class="mb-1">Employee Calendar</h2>
                <nav>
                    <ol class="breadcrumb mb-0">
                        <li class="breadcrumb-item">
                            <a href="{{ route('dashboard') }}"><i class="ti ti-smart-home"></i></a>
                        </li>
                        <li class="breadcrumb-item">Attendance</li>
                        <li class="breadcrumb-item active" aria-current="page">Calendar</li>
                    </ol>
                </nav>
            </div>
            <div class="d-flex my-xl-auto right-content align-items-center flex-wrap gap-2">
                
                <div class="mb-2 d-flex align-items-center gap-2">
                    <button class="btn btn-light" id="calPrev"><i class="ti ti-chevron-left"></i></button>
                    <div class="h5 mb-0" id="calTitle">March 2025</div>
                    <button class="btn btn-light" id="calNext"><i class="ti ti-chevron-right"></i></button>
                    <button class="btn btn-outline-primary ms-2" id="calToday">Today</button>
                </div>
            </div>
        </div>

        @include('partials.alerts')

        <div class="card">
            <div class="card-header d-flex align-items-center justify-content-between flex-wrap row-gap-3">
                <h5>Work Calendar</h5>
                <div class="d-flex align-items-center gap-2">
                    <span class="badge bg-success">Working Day</span>
                    <span class="badge bg-secondary">Weekend</span>
                    <span class="badge bg-warning text-dark">Holiday</span>
                    <span class="badge bg-info text-dark">Rescheduled</span>
                </div>
            </div>
            <div class="card-body p-0">
                <div class="table-responsive">
                    <table class="table mb-0 calendar-table">
                        <thead class="table-light">
                            <tr>
                                <th style="width:14.28%">Sun</th>
                                <th style="width:14.28%">Mon</th>
                                <th style="width:14.28%">Tue</th>
                                <th style="width:14.28%">Wed</th>
                                <th style="width:14.28%">Thu</th>
                                <th style="width:14.28%">Fri</th>
                                <th style="width:14.28%">Sat</th>
                            </tr>
                        </thead>
                        <tbody id="calBody"></tbody>
                    </table>
                </div>
            </div>
        </div>
    </div>

    <style>
        .calendar-table td { height: 120px; vertical-align: top; }
        @media (max-width: 992px) { .calendar-table td { height: 100px; } }
        @media (max-width: 576px) { .calendar-table td { height: 80px; } }
    </style>
    <script>
        (function(){
            const title = document.getElementById('calTitle');
            const body = document.getElementById('calBody');
            const btnPrev = document.getElementById('calPrev');
            const btnNext = document.getElementById('calNext');
            const btnToday = document.getElementById('calToday');
            let current = new Date();

            function formatTitle(d){
                return d.toLocaleString('default', { month: 'long', year: 'numeric' });
            }

            function startOfMonth(d){
                return new Date(d.getFullYear(), d.getMonth(), 1);
            }

            function daysInMonth(d){
                return new Date(d.getFullYear(), d.getMonth()+1, 0).getDate();
            }

            function render(){
                const first = startOfMonth(current);
                const total = daysInMonth(current);
                const startWeekDay = first.getDay(); // 0=Sun
                title.textContent = formatTitle(current);
                let html = '';
                let day = 1;
                for(let row=0; row<6; row++){
                    html += '<tr>';
                    for(let col=0; col<7; col++){
                        if(row === 0 && col < startWeekDay){
                            html += '<td class="align-top p-2 text-muted"><div class="small">&nbsp;</div></td>';
                        } else if(day > total){
                            html += '<td class="align-top p-2 text-muted"><div class="small">&nbsp;</div></td>';
                        } else {
                            const isWeekend = (col === 0 || col === 6);
                            const cls = isWeekend ? ' bg-light' : '';
                            html += '<td class="align-top p-2'+cls+'">'
                                + '<div class="small fw-semibold">'+day+'</div>'
                                + (!isWeekend ? '<span class="badge bg-success mt-1">Shift A</span>' : '<span class="badge bg-secondary mt-1">Weekend</span>')
                                + '</td>';
                            day++;
                        }
                    }
                    html += '</tr>';
                    if(day > total) break;
                }
                body.innerHTML = html;
            }

            btnPrev.addEventListener('click', function(){
                current = new Date(current.getFullYear(), current.getMonth()-1, 1);
                render();
            });
            btnNext.addEventListener('click', function(){
                current = new Date(current.getFullYear(), current.getMonth()+1, 1);
                render();
            });
            btnToday.addEventListener('click', function(){
                current = new Date();
                render();
            });

            render();
        })();
    </script>
@endsection