var editorType = '';
var editorFields = [];
var currentID = null;
var allIDs = [];
var treeData = { root: [], dirs: {} };
var collapsedDirs = {};

function initEditor(type, fields) {
  editorType = type;
  editorFields = fields;
  loadList();
  var hash = window.location.hash.substring(1);
  if (hash) { loadItem(hash); }
}

function loadList() {
  API.get('/api/' + editorType).then(function(data) {
    if (Array.isArray(data)) {
      treeData = { root: data, dirs: {} };
      allIDs = data.slice();
    } else {
      treeData = { root: data.root || [], dirs: data.dirs || {} };
      allIDs = treeData.root.slice();
      Object.keys(treeData.dirs).sort().forEach(function(dir) {
        Array.prototype.push.apply(allIDs, treeData.dirs[dir]);
      });
    }
    renderList('');
  }).catch(function(e) {
    notify('Failed to load list: ' + e.message, 'error');
  });
}

function renderList(filter) {
  var el = $('#listEntries');
  var f = (filter || '').toLowerCase();

  var html = '';
  var hasDirs = Object.keys(treeData.dirs).length > 0;

  if (treeData.root.length > 0 || !hasDirs) {
    html += renderDirGroup(hasDirs ? 'Root' : '', treeData.root, f);
  }

  if (hasDirs) {
    Object.keys(treeData.dirs).sort().forEach(function(dir) {
      html += renderDirGroup(dir, treeData.dirs[dir], f);
    });
  }

  el.innerHTML = html;
}

function renderDirGroup(name, ids, filter) {
  if (ids.length === 0 && !filter) return '';
  var isFiltering = !!filter;
  var displayIds = ids;
  if (isFiltering) {
    displayIds = ids.filter(function(id) { return String(id).toLowerCase().indexOf(filter) >= 0; });
    if (displayIds.length === 0) return '';
  }
  var expanded = isFiltering ? true : (collapsedDirs[name] === true);
  var displayName = name || editorType.charAt(0).toUpperCase() + editorType.slice(1);
  var h = '<div class="dir-group">';
  if (name) {
    h += '<div class="dir-header" onclick="toggleDir(\'' + escAttr(name) + '\')">';
    h += '<span class="dir-arrow">' + (expanded ? '&#9660;' : '&#9654;') + '</span>';
    h += '<span class="dir-name">' + esc(displayName) + '</span>';
    h += '<span class="dir-count">' + (isFiltering ? displayIds.length + '/' + ids.length : ids.length) + '</span>';
    h += '</div>';
  }
  h += '<div class="dir-items"' + (name && !expanded ? ' style="display:none"' : '') + '>';
  displayIds.forEach(function(id) {
    h += '<div class="item' + (id === currentID ? ' active' : '') + '" onclick="loadItem(\'' + esc(id) + '\')">' + esc(id) + '</div>';
  });
  h += '</div>';
  h += '</div>';
  return h;
}

function toggleDir(name) {
  collapsedDirs[name] = collapsedDirs[name] !== true;
  renderList('');
}

function filterList(val) {
  renderList(val);
}

function loadItem(id) {
  currentID = id;
  renderList('');
  window.location.hash = id;
  API.get('/api/' + editorType + '/' + encodeURIComponent(id)).then(function(data) {
    renderEditor(id, data);
  }).catch(function(e) {
    $('#editorMain').innerHTML = '<p style="color:var(--danger)">Failed to load: ' + esc(e.message) + '</p>';
  });
}

function renderEditor(id, data) {
  var obj = data;
  var html = '<h2>' + esc(editorType.charAt(0).toUpperCase() + editorType.slice(1)) + ': ' + esc(id) + '</h2>';

  html += '<div class="tabs"><button class="tab active" onclick="switchTab(event,\'fields\')">Fields</button>';
  html += '<button class="tab" onclick="switchTab(event,\'yaml\')">Raw YAML</button></div>';

  html += '<div class="tab-content" id="tabFields">';
  html += '<div class="form-grid">';
  editorFields.forEach(function(f) {
    var val = getNested(obj, f.key);
    val = val === undefined || val === null ? '' : val;
    var cls = f.type === 'textarea' ? 'form-group full' : 'form-group';
    if (f.type === 'textarea') {
      var displayVal;
      if (f.encode) {
        displayVal = f.encode(val);
      } else if (typeof val === 'object') {
        displayVal = JSON.stringify(val, null, 2);
      } else {
        displayVal = String(val);
      }
      html += '<div class="'+cls+'"><label>' + esc(f.label) + '</label><textarea id="f_' + esc(f.key) + '" rows="4">' + esc(displayVal) + '</textarea></div>';
    } else if (f.type === 'checkbox') {
      html += '<div class="'+cls+'"><label><input type="checkbox" id="f_' + esc(f.key) + '"' + (val ? ' checked' : '') + '> ' + esc(f.label) + '</label></div>';
    } else if (f.type === 'number') {
      html += '<div class="'+cls+'"><label>' + esc(f.label) + '</label><input type="number" id="f_' + esc(f.key) + '" value="' + escAttr(String(val)) + '"></div>';
    } else if (f.type === 'color') {
      html += '<div class="'+cls+' color-field"><label>' + esc(f.label) + '</label><span class="color-swatch" style="background:#' + escAttr(String(val) || '808080') + '"></span><input id="f_' + esc(f.key) + '" value="' + escAttr(String(val) || '') + '"></div>';
    } else {
      html += '<div class="'+cls+'"><label>' + esc(f.label) + '</label><input id="f_' + esc(f.key) + '" value="' + escAttr(String(val)) + '"></div>';
    }
  });
  html += '</div>';
  html += '</div>';

  html += '<div class="tab-content" id="tabYaml" style="display:none">';
  html += '<pre>' + esc(obj._raw || JSON.stringify(obj, null, 2)) + '</pre>';
  html += '</div>';

  html += '<div class="btn-row">';
  html += '<button class="btn btn-primary" onclick="saveItem(\'' + esc(id) + '\')">Save</button>';
  html += '<button class="btn btn-danger" onclick="deleteItem(\'' + esc(id) + '\')">Delete</button>';
  html += '</div>';

  $('#editorMain').innerHTML = html;
  setTimeout(function() {
    document.querySelectorAll('.color-field').forEach(function(el) { bindColorField(el); });
  }, 50);
}

function saveItem(id) {
  var data = {};
  editorFields.forEach(function(f) {
    var el = $('#f_' + f.key);
    if (!el) return;
    var val;
    if (f.type === 'checkbox') {
      val = el.checked;
    } else if (f.type === 'number') {
      val = parseFloat(el.value) || 0;
    } else if (f.type === 'textarea') {
      val = el.value;
    } else {
      val = el.value;
    }
    if (f.parser) {
      val = f.parser(val);
    }
    setNested(data, f.key, val);
  });
  data.id = id;

  API.put('/api/' + editorType + '/' + encodeURIComponent(id), data).then(function() {
    notify(editorType + ' ' + id + ' saved', 'success');
    updateUndoBar();
  }).catch(function(e) { notify('Save failed: ' + e.message, 'error'); });
}

function deleteItem(id) {
  if (!confirm('Delete ' + editorType + ' "' + id + '"?')) return;
  API.del('/api/' + editorType + '/' + encodeURIComponent(id)).then(function() {
    notify(editorType + ' ' + id + ' deleted', 'success');
    updateUndoBar();
    currentID = null;
    $('#editorMain').innerHTML = '<p style="color:#888;text-align:center;margin-top:60px">Deleted</p>';
    loadList();
  }).catch(function(e) { notify('Delete failed: ' + e.message, 'error'); });
}

function createNew() {
  var name = prompt(editorType + ' ID:');
  if (!name) return;
  API.post('/api/' + editorType, {id: name}).then(function() {
    notify(editorType + ' ' + name + ' created', 'success');
    updateUndoBar();
    loadList();
    loadItem(name);
  }).catch(function(e) { notify('Create failed: ' + e.message, 'error'); });
}

function switchTab(e, tab) {
  e.target.parentElement.querySelectorAll('.tab').forEach(function(t) { t.classList.remove('active'); });
  e.target.classList.add('active');
  var tabs = $('#editorMain').querySelectorAll('.tab-content');
  tabs.forEach(function(t) { t.style.display = 'none'; });
  var target = document.getElementById('tab' + tab.charAt(0).toUpperCase() + tab.slice(1));
  if (target) target.style.display = 'block';

  if (tab === 'yaml' && currentID) {
    API.get('/api/' + editorType + '/' + encodeURIComponent(currentID)).then(function(data) {
      var pre = document.querySelector('#tabYaml pre');
      if (pre) pre.textContent = data._raw || JSON.stringify(data, null, 2);
    });
  }
}

function getNested(obj, path) {
  return path.split('.').reduce(function(o, k) { return o && o[k] !== undefined ? o[k] : undefined; }, obj);
}

function setNested(obj, path, val) {
  var keys = path.split('.');
  var last = keys.pop();
  var target = keys.reduce(function(o, k) {
    if (!o[k]) o[k] = {};
    return o[k];
  }, obj);
  target[last] = val;
}

function esc(s) { return String(s || '').replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;').replace(/"/g,'&quot;'); }
function escAttr(s) { return String(s || '').replace(/&/g,'&amp;').replace(/"/g,'&quot;'); }

window.refreshPage = function() { loadList(); if (currentID) loadItem(currentID); };