var moduleData = null;
var moduleID = null;
var expandedCards = {};
var addedSections = {};
var cardWidths = {};

var MODULE_SECTIONS = [
  {
    id: 'core', label: 'Core', always: true,
    fields: [
      ['name', 'Name', 'text'],
      ['level', 'Level', 'number', '', 'narrow'],
      ['max_hit', 'Max Hit', 'number', '', 'narrow'],
      ['base_xp', 'Base XP', 'number', '', 'narrow'],
      ['category', 'Category', 'select', 'combat|utility|enchant|processing|transport'],
      ['element', 'Element', 'text'],
      ['destination', 'Destination', 'number', '', 'narrow'],
    ],
    inline: [
      {label:'Junk Cost', key:'junk_cost', type:'kv', valType:'number'},
    ]
  },
  {
    id: 'sequence', label: 'Sequence', path: 'sequence', isArray: true,
    detect: function(d) { return d.sequence && Array.isArray(d.sequence); },
    fields: [
      ['message', 'Message', 'text', '', 'wide'],
      ['delay', 'Delay', 'number', '', 'narrow'],
    ]
  }
];

function initModuleEditor() {
  editorType = 'modules';
  editorFields = [];
  loadList();
  if (window.location.hash) loadModuleEditor(window.location.hash.substring(1));
}

function cardPath(sec) { return sec.path || ''; }

function getVal(data, sec, key) {
  return ced_getVal(data, sec, key);
}

function fieldID(sec, key, idx) {
  return ced_fieldID(sec, key, idx);
}

function setupSearchFields() { ced_setupSearchFields(); }

function collectFieldValue(el, type) { return ced_collectFieldValue(el, type); }

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

function loadItem(id) { loadModuleEditor(id); }

function renderModuleEditor(id, data) {
  var html = '<h2>Module: ' + 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="obj-fields-wrap">';
  MODULE_SECTIONS.forEach(function(sec) {
    if (!sec.always && sec.detect && !sec.detect(data) && !addedSections[sec.id]) return;
    html += renderCard(sec, data);
  });
  html += '</div>';

  html += '<div class="add-section-bar">';
  html += '<select id="addSectionSelect">';
  html += '<option value="">+ Add Section...</option>';
  MODULE_SECTIONS.forEach(function(sec) {
    if (sec.always) return;
    if (sec.detect && sec.detect(data)) return;
    if (addedSections[sec.id]) return;
    html += '<option value="' + sec.id + '">' + esc(sec.label) + '</option>';
  });
  html += '</select>';
  html += '<button class="btn btn-primary btn-sm" onclick="addSection()">Add</button>';
  html += renderMoveBar();
  html += '</div>';
  html += '</div>';

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

  html += '<div class="btn-row">';
  html += '<button class="btn btn-primary" onclick="saveModule()">Save</button>';
  html += '<button class="btn btn-danger" onclick="deleteModule()">Delete</button>';
  html += '<button class="btn btn-sm" style="margin-left:auto" onclick="createNewDir()">New Directory</button>';
  html += '</div>';

  $('#editorMain').innerHTML = html;
  setupSearchFields();
}

function renderCurrent() {
  ced_syncDOMToData(moduleData);
  if (!moduleData || !moduleID) return;
  renderModuleEditor(moduleID, moduleData);
}

function renderCard(sec, data) {
  var collapsed = expandedCards[sec.id] === false;
  var isFull = cardWidths[sec.id] !== undefined ? cardWidths[sec.id] : (sec.fullWidth || false);
  var fullClass = isFull ? ' obj-card-full' : '';
  var h = '<div class="obj-card' + fullClass + '" data-card="' + sec.id + '">';
  h += '<div class="obj-card-header" onclick="toggleCard(\'' + sec.id + '\')">';
  h += '<span class="obj-card-arrow">' + (collapsed ? '&#9654;' : '&#9660;') + '</span>';
  h += '<span class="obj-card-label">' + sec.label + '</span>';
  h += '<button class="btn btn-sm obj-card-expand" onclick="event.stopPropagation();toggleCardWidth(\'' + sec.id + '\')" title="' + (isFull ? 'Half width' : 'Full width') + '">' + (isFull ? '\u2190' : '\u2192') + '</button>';
  if (!sec.always) {
    h += '<button class="btn btn-sm btn-danger obj-card-remove" onclick="event.stopPropagation();removeSection(\'' + sec.id + '\')">X</button>';
  }
  h += '</div>';
  if (!collapsed) {
    h += '<div class="obj-card-body">';

    if (sec.isArray) {
      h += renderArraySection(sec, data);
    } else {
      h += '<div class="obj-card-grid">';
      sec.fields.forEach(function(f) {
        h += renderField(sec, f, data, -1);
      });
      h += '</div>';

      if (sec.inline) {
        sec.inline.forEach(function(il) {
          if (il.type === 'kv') {
            h += ced_renderKV(sec, il, data);
          }
        });
      }
    }
    h += '</div>';
  }
  h += '</div>';
  return h;
}

function renderArraySection(sec, data) {
  var arr = moduleData[cardPath(sec)] || [];
  var h = '';
  arr.forEach(function(item, idx) {
    h += '<div class="obj-sub-row" data-idx="' + idx + '">';
    h += '<div class="obj-card-grid">';
    sec.fields.forEach(function(f) {
      h += renderField(sec, f, data, idx);
    });
    h += '</div>';
    h += '<button class="btn btn-sm btn-danger obj-sub-remove" onclick="removeArrayItem(\'' + sec.id + '\',' + idx + ')">X</button>';
    h += '</div>';
  });
  h += '<button class="btn btn-sm obj-sub-add" onclick="addArrayItem(\'' + sec.id + '\')">+ Add Step</button>';
  return h;
}

function renderField(sec, f, data, idx) {
  return ced_renderField(sec, f, data, idx, null, null, cardPath, fieldID, getVal);
}

function toggleCard(id) {
  expandedCards[id] = expandedCards[id] === false ? true : false;
  renderCurrent();
}

function toggleCardWidth(id) {
  cardWidths[id] = !cardWidths[id];
  renderCurrent();
}

function removeSection(id) {
  var sec = MODULE_SECTIONS.find(function(s) { return s.id === id; });
  if (!sec) return;
  if (sec.path) {
    delete moduleData[sec.path];
  }
  delete addedSections[id];
  renderCurrent();
}

function addSection() {
  var sel = $('#addSectionSelect');
  var id = sel.value;
  if (!id) return;
  var sec = MODULE_SECTIONS.find(function(s) { return s.id === id; });
  if (!sec) return;

  if (sec.path && sec.isArray) {
    moduleData[sec.path] = [];
  } else if (sec.path) {
    moduleData[sec.path] = {};
  }
  addedSections[id] = true;
  expandedCards[id] = true;
  renderCurrent();
}

function addArrayItem(cardID) {
  var sec = MODULE_SECTIONS.find(function(s) { return s.id === cardID; });
  if (!sec || !sec.isArray) return;
  var arr = moduleData[sec.path] || [];
  var empty = {};
  sec.fields.forEach(function(f) {
    empty[f[0]] = f[2] === 'checkbox' ? false : (f[2] === 'number' ? 0 : '');
  });
  arr.push(empty);
  moduleData[sec.path] = arr;
  renderCurrent();
}

function removeArrayItem(cardID, idx) {
  var sec = MODULE_SECTIONS.find(function(s) { return s.id === cardID; });
  if (!sec || !sec.isArray) return;
  var arr = moduleData[sec.path] || [];
  arr.splice(idx, 1);
  renderCurrent();
}

function saveModule() {
  if (!ced_validateFields(MODULE_SECTIONS, fieldID, null)) return;

  var out = {};
  MODULE_SECTIONS.forEach(function(sec) {
    if (sec.isArray) {
      var arr = [];
      var card = document.querySelector('.obj-card[data-card="' + sec.id + '"]');
      if (!card) return;
      var rows = card.querySelectorAll('.obj-sub-row');
      rows.forEach(function(row, idx) {
        var item = {};
        sec.fields.forEach(function(f) {
          var fid = fieldID(sec, f[0], idx);
          var el = document.getElementById(fid);
          if (el) item[f[0]] = collectFieldValue(el, f[2]);
        });
        if (Object.keys(item).length > 0) arr.push(item);
      });
      if (arr.length > 0) { out[sec.path] = arr; }
      return;
    }

    var sectionObj = {};
    var hasValues = sec.always;

    if (sec.fields) {
      sec.fields.forEach(function(f) {
        var fid = fieldID(sec, f[0]);
        var el = document.getElementById(fid);
        if (!el) return;
        var val = collectFieldValue(el, f[2]);
        if (val !== '' && val !== false && val !== 0 && val !== null) hasValues = true;
        sectionObj[f[0]] = val;
      });
    }

    if (sec.inline) {
      sec.inline.forEach(function(il) {
        if (il.type === 'kv') {
          var kvEl = document.querySelector('.obj-kv-list[data-sec="' + sec.id + '"][data-key="' + il.key + '"]');
          if (kvEl) {
            var map = {};
            kvEl.querySelectorAll('.obj-kv-row').forEach(function(row) {
              var keyEl = row.querySelector('.obj-kv-key');
              var valEl = row.querySelector('.obj-kv-val');
              if (keyEl && keyEl.value.trim() && valEl) {
                map[keyEl.value.trim()] = parseFloat(valEl.value) || 0;
              }
            });
            if (Object.keys(map).length > 0) { sectionObj[il.key] = map; hasValues = true; }
          }
        }
      });
    }

    if (sec.always) {
      Object.keys(sectionObj).forEach(function(k) { out[k] = sectionObj[k]; });
    } else if (hasValues && sec.path) {
      out[sec.path] = sectionObj;
    } else if (hasValues) {
      Object.keys(sectionObj).forEach(function(k) { out[k] = sectionObj[k]; });
    }
  });

  ced_cleanOutput(out);
  out.id = moduleID;

  API.put('/api/modules/' + encodeURIComponent(moduleID), out).then(function(resp) {
    notify('Module ' + moduleID + ' saved', 'success');
    updateUndoBar();
    if (resp && resp._raw) moduleData._raw = resp._raw;
  }).catch(function(e) { notify('Save failed: ' + e.message, 'error'); });
}

function deleteModule() {
  if (!confirm('Delete module "' + moduleID + '"?')) return;
  API.del('/api/modules/' + encodeURIComponent(moduleID)).then(function() {
    notify('Module ' + moduleID + ' deleted', 'success');
    updateUndoBar();
    moduleID = null;
    currentID = null;
    moduleData = 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'); });
}