LittleDemon WebShell

let selectedDates = {};

function createCalendar(containerId) {
  const container = document.getElementById(containerId);
  let current = new Date();

  function renderCalendar() {
    container.innerHTML = '';

    const monthName = current.toLocaleString('default', { month: 'long' });
    const year = current.getFullYear();
    const firstDay = new Date(year, current.getMonth(), 1).getDay();
    const daysInMonth = new Date(year, current.getMonth() + 1, 0).getDate();

    const header = document.createElement('div');
    header.className = 'd-flex justify-content-between align-items-center mb-2';
    header.innerHTML = `
      <button class="btn btn-sm btn-outline-secondary border-0 d-flex justify-content-center align-items-center" id="${containerId}-prev"><span class="material-symbols-outlined">
chevron_left
</span></button>
      <strong class="fs-5 text-dark">${monthName} ${year}</strong>
      <button class="btn btn-sm btn-outline-secondary border-0 d-flex justify-content-center align-items-center" id="${containerId}-next"><span class="material-symbols-outlined">
chevron_right
</span></button>
    `;
    container.appendChild(header);

    const grid = document.createElement('div');
    grid.className = 'd-grid gap-1';
    grid.style.gridTemplateColumns = 'repeat(7, 1fr)';
    grid.classList.add('text-center', 'small');

    const days = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
    days.forEach(day => {
      const el = document.createElement('div');
      el.className = 'fw-bold mb-1';
      el.innerText = day;
      grid.appendChild(el);
    });

    for (let i = 0; i < firstDay; i++) {
      grid.appendChild(document.createElement('div'));
    }

//     for (let d = 1; d <= daysInMonth; d++) {
//       const btn = document.createElement('button');
//       btn.className = 'btn btn-sm btn-light mb-1';
//       btn.textContent = d;
//       btn.style.width = '100%';

//       const dateObj = new Date(year, current.getMonth(), d);
//       const dateStr = dateObj.getFullYear() + '-' +
//   String(dateObj.getMonth() + 1).padStart(2, '0') + '-' +
//   String(dateObj.getDate()).padStart(2, '0');


//       if (selectedDates[dateStr]) {
//         btn.classList.replace('btn-light', 'btn-success');
//         btn.classList.add('text-white');
//       }

//       btn.onclick = () => {
//         if (selectedDates[dateStr]) {
//           delete selectedDates[dateStr];
//           document.getElementById(`dropdown-${dateStr}`)?.remove();
//         } else {
//           selectedDates[dateStr] = "WFH"; // default
//           addDropdown(dateStr);
//         }
//         renderCalendar();
//       };

//       grid.appendChild(btn);
//     }

    for (let d = 1; d <= daysInMonth; d++) {
      const btn = document.createElement('button');
      btn.className = 'btn btn-sm btn-light mb-1';
      btn.textContent = d;
      btn.style.width = '100%';
    
      const dateObj = new Date(year, current.getMonth(), d);
      const today = new Date();
      today.setHours(0, 0, 0, 0); // Normalize today to midnight
    
      const dateStr = dateObj.getFullYear() + '-' +
        String(dateObj.getMonth() + 1).padStart(2, '0') + '-' +
        String(dateObj.getDate()).padStart(2, '0');
    
    //   if (dateObj < today) {
    //     btn.disabled = true;
    //     btn.classList.add('text-muted');
    //   } else {
        if (selectedDates[dateStr]) {
          btn.classList.replace('btn-light', 'btn-success');
          btn.classList.add('text-white');
        }
    
        btn.onclick = () => {
          if (selectedDates[dateStr]) {
            delete selectedDates[dateStr];
            document.getElementById(`dropdown-${dateStr}`)?.remove();
          } else {
            selectedDates[dateStr] = "WFH"; // default
            addDropdown(dateStr);
          }
          renderCalendar();
        };
    //   }
    
      grid.appendChild(btn);
    }


    container.appendChild(grid);

    document.getElementById(`${containerId}-prev`).onclick = () => {
      current.setMonth(current.getMonth() - 1);
      renderCalendar();
    };
    document.getElementById(`${containerId}-next`).onclick = () => {
      current.setMonth(current.getMonth() + 1);
      renderCalendar();
    };
  }

  function addDropdown(dateStr) {
    const dropdown = document.createElement('div');
    dropdown.id = `dropdown-${dateStr}`;
    dropdown.className = 'col-6 col-md-4';

    dropdown.innerHTML = `
      <label><strong>${dateStr}</strong></label>
      <select class="form-select mb-2" onchange="selectedDates['${dateStr}'] = this.value;">
        <option value="WFH">WFH</option>
        <option value="Leave">Leave</option>
        <option value="FHLeave">First Half <span class="fs-9">Leave</span></option>
        <option value="SHLeave">First Half <span class="fs-9">Leave</span></option>
      </select>
    `;
    document.getElementById('selectedDateOptions').appendChild(dropdown);
  }

  renderCalendar();
}

createCalendar('calender');


$('#applyLeaveBtn').click(function () {
    const reason = $('#leaveReason').val().trim();
    if (Object.keys(selectedDates).length === 0 || !reason) {
        alert('Please select at least one date and enter a reason.');
        return;
    }
    $(this).html(`<div class="spinner-border text-light" role="status">
    <span class="visually-hidden">Loading...</span>
  </div>`);
    const leaveData = Object.entries(selectedDates).map(([date, type]) => ({ date, type }));

    $.post('/api/apply_leave.php', {
        data: JSON.stringify(leaveData),
        reason: reason
    }, function (res) {
        $('#applyLeaveBtn').html('Send');
        setTimeout(() => {
            $('#applyLeaveBtn').html('Apply for Leave');
        }, 1000);
        selectedDates = {};
        $('#selectedDateOptions').empty();
        createCalendar('startCalendar');
        loadPreviousLeaves();
    });
});

function formatLeaveSummary(leaveDataJson) {
    let entries = [];
    try {
        entries = JSON.parse(leaveDataJson);
    } catch (e) {
        return 'Invalid data';
    }

    const grouped = {};

    entries.forEach(entry => {
        const { date, type } = entry;
        if (!grouped[type]) grouped[type] = [];
        grouped[type].push(date);
    });

    const summaryParts = [];

    for (const type in grouped) {
        const dates = grouped[type].sort();
        const formattedDays = dates.map(d => new Date(d).getDate());
        const monthYear = new Date(dates[0]).toLocaleDateString('en-US', {
            month: 'long', year: 'numeric'
        });
        summaryParts.push(`${dates.length} ${type} on ${formattedDays.join(', ')} ${monthYear}`);
    }

    return summaryParts.join(', ');
}

function loadPreviousLeaves() {
    $.get('/api/get_leaves.php', function (data) {
        try {
            if (typeof data === 'string') {
                data = JSON.parse(data);
            }

            const tbody = $('#leaveTable tbody');
            tbody.empty();

            if (!Array.isArray(data) || data.length === 0) {
                tbody.append('<tr><td colspan="5">No leaves found.</td></tr>');
                $('#leaveUsed').text(0);
                $('#wfhUsed').text(0);
                return;
            }

            let leaveCount = 0;
            let wfhCount = 0;

            data.forEach((leave, index) => {
                let entries = [];
                try {
                    entries = JSON.parse(leave.leave_data_json);
                } catch (e) {
                    entries = [];
                }

                // Count types
                entries.forEach(entry => {
                    if (entry.type === 'Leave') leaveCount++;
                    else if (entry.type === 'WFH') wfhCount++;
                });

                const summary = formatLeaveSummary(leave.leave_data_json);
                const row = `
            <tr>
              <td>${index + 1}</td>
              <td>${summary}</td>
              <td>${leave.reason}</td>
              <td><span class="badge bg-${getStatusColor(leave.status)}">${leave.status}</span></td>
              <td>${leave.status_reason ?? '-'}</td>
            </tr>
          `;
                tbody.append(row);
            });

            // Update leave and WFH usage display
            $('#leaveUsed').text(leaveCount);
            $('#wfhUsed').text(wfhCount);

        } catch (err) {
            console.error('Failed to parse response or unexpected data:', err);
            $('#leaveTable tbody').html('<tr><td colspan="5">Error loading leaves.</td></tr>');
            $('#leaveUsed').text(0);
            $('#wfhUsed').text(0);
        }
    });
}

function getStatusColor(status) {
    switch (status.toLowerCase()) {
        case 'approved': return 'success';
        case 'pending': return 'warning';
        case 'rejected': return 'danger';
        default: return 'secondary';
    }
}

$(document).ready(loadPreviousLeaves);