// Copyright © 2026 Olaf Kolkman
// SPDX-License-Identifier: GPL-3.0-or-later

(() => {
const labelAuthNotice = document.querySelector('#label-auth-notice');
const labelControls = document.querySelector('#label-controls');
const labelForm = document.querySelector('#label-form');
const labelNameInput = document.querySelector('#label-name');
const labelStatus = document.querySelector('#label-status');
const labelList = document.querySelector('#label-list');
const accessToken = localStorage.getItem('linklogAccessToken');
let currentUserId = null;

function authHeaders(includeJson = false) {
  return {
    ...(includeJson ? {'Content-Type': 'application/json'} : {}),
    ...(accessToken ? {Authorization: `Bearer ${accessToken}`} : {}),
  };
}

function setStatus(message, isError = false) {
  if (!labelStatus) return;
  labelStatus.textContent = message;
  labelStatus.style.color = isError ? '#b91c1c' : '#166534';
}

async function responseError(response, fallback) {
  try {
    const result = await response.json();
    return result.detail || result.message || fallback;
  } catch {
    return fallback;
  }
}

function renderLabels(labels) {
  if (!labelList) return;
  if (!labels || labels.length === 0) {
    labelList.innerHTML = '<p>No labels found.</p>';
    return;
  }

  labelList.replaceChildren(...labels.map((label) => {
    const row = document.createElement('div');
    row.className = 'plugin-row';

    const isOwned = label.created_by === currentUserId;

    const contentContainer = document.createElement('div');
    contentContainer.style.display = 'flex';
    contentContainer.style.alignItems = 'center';
    contentContainer.style.justifySpaceBetween = 'space-between';
    contentContainer.style.width = '100%';

    const text = document.createElement('span');
    text.textContent = `${label.name}${isOwned ? '' : (label.creator ? ` (${label.creator})` : ' (default)')}`;

    contentContainer.appendChild(text);

    if (isOwned) {
      const actions = document.createElement('div');
      actions.style.display = 'flex';
      actions.style.gap = '8px';

      const editButton = document.createElement('button');
      editButton.type = 'button';
      editButton.textContent = 'Edit';
      editButton.addEventListener('click', () => {
        showInlineEdit(row, label);
      });

      const deleteButton = document.createElement('button');
      deleteButton.type = 'button';
      deleteButton.className = 'danger-button';
      deleteButton.textContent = 'Delete';
      deleteButton.addEventListener('click', async () => {
        if (!confirm(`Are you sure you want to delete "${label.name}"?`)) return;
        setStatus('');
        const response = await fetch(`/api/user/labels/${label.id}`, {
          method: 'DELETE',
          headers: authHeaders(),
        });
        if (response.ok) {
          setStatus(`Deleted label ${label.name}`);
          loadLabels();
        } else {
          setStatus(await responseError(response, 'Could not delete label'), true);
        }
      });

      actions.append(editButton, deleteButton);
      contentContainer.appendChild(actions);
    }

    row.appendChild(contentContainer);
    return row;
  }));
}

function showInlineEdit(rowContainer, label) {
  rowContainer.replaceChildren();

  const editForm = document.createElement('form');
  editForm.style.display = 'flex';
  editForm.style.gap = '8px';
  editForm.style.width = '100%';
  editForm.style.alignItems = 'center';

  const input = document.createElement('input');
  input.type = 'text';
  input.value = label.name;
  input.required = true;
  input.style.flex = '1';

  const saveButton = document.createElement('button');
  saveButton.type = 'submit';
  saveButton.textContent = 'Save';

  const cancelButton = document.createElement('button');
  cancelButton.type = 'button';
  cancelButton.textContent = 'Cancel';
  cancelButton.addEventListener('click', () => {
    loadLabels();
  });

  editForm.append(input, saveButton, cancelButton);

  editForm.addEventListener('submit', async (e) => {
    e.preventDefault();
    const newName = input.value.trim();
    if (!newName) return;
    setStatus('');
    const response = await fetch(`/api/user/labels/${label.id}`, {
      method: 'PUT',
      headers: authHeaders(true),
      body: JSON.stringify({ name: newName }),
    });
    if (response.ok) {
      setStatus(`Updated label to ${newName}`);
      loadLabels();
    } else {
      setStatus(await responseError(response, 'Could not update label'), true);
    }
  });

  rowContainer.appendChild(editForm);
  input.focus();
}

async function loadLabels() {
  try {
    const response = await fetch('/api/user/labels', { headers: authHeaders() });
    if (!response.ok) throw new Error('Could not load labels');
    const labels = await response.json();
    renderLabels(labels);
  } catch (error) {
    setStatus('Error loading labels', true);
  }
}

async function init() {
  if (!accessToken) {
    if (labelAuthNotice) labelAuthNotice.classList.remove('hidden');
    if (labelControls) labelControls.classList.add('hidden');
    return;
  }

  if (labelAuthNotice) labelAuthNotice.classList.add('hidden');
  if (labelControls) labelControls.classList.remove('hidden');

  try {
    const meResponse = await fetch('/api/auth/me', { headers: authHeaders() });
    if (meResponse.ok) {
      const me = await meResponse.json();
      currentUserId = me.id;
    }
  } catch {
    // Proceed if me fails
  }

  await loadLabels();

  if (labelForm) {
    labelForm.addEventListener('submit', async (e) => {
      e.preventDefault();
      const name = labelNameInput.value.trim();
      if (!name) return;
      setStatus('');
      const response = await fetch('/api/user/labels', {
        method: 'POST',
        headers: authHeaders(true),
        body: JSON.stringify({ name }),
      });
      if (response.ok) {
        labelNameInput.value = '';
        setStatus(`Added label ${name}`);
        loadLabels();
      } else {
        setStatus(await responseError(response, 'Could not add label'), true);
      }
    });
  }
}

document.addEventListener('DOMContentLoaded', init);
if (document.readyState !== 'loading') {
  init();
}
})();