class PhysicalPositionMenu {

  // 1) Server-side: provide the option groups
  getAllMenuData() {
    return {
      positionGroups: [
        { group: 'Positional', options: [
            { value: 'upstream',     label: '⬅ Upstream'     },
            { value: 'atEquipment',  label: '⚙️ At Equipment' },
            { value: 'downstream',   label: '➡ Downstream'   }
          ]
        }
      ]
    };
  }

  // 2) HTML template (pure markup)
  getHtmlTemplate() {
    return `
    <hr />
    <h3>Physical Position vs parent</h3>
      <div class="form-row">
        <label for="node-input-positionVsParent"><i class="fa fa-map-marker"></i>Position</label>
        <select id="node-input-positionVsParent" style="width:70%;">
          <!-- optgroups will be injected -->
        </select>
      </div>
    <hr />
    `;
  }

  // 3) HTML injector
  getHtmlInjectionCode(nodeName) {
    const tpl = this.getHtmlTemplate()
      .replace(/`/g,'\\`').replace(/\$/g,'\\$');
    return `
      // PhysicalPosition HTML injection for ${nodeName}
      window.EVOLV.nodes.${nodeName}.positionMenu.injectHtml = function() {
        const ph = document.getElementById('position-fields-placeholder');
        if (ph && !ph.hasChildNodes()) {
          ph.innerHTML = \`${tpl}\`;
        }
      };
    `;
  }

  // 4) Data-loader injector
  getDataInjectionCode(nodeName) {
    return `
      // PhysicalPosition data loader for ${nodeName}
      window.EVOLV.nodes.${nodeName}.positionMenu.loadData = function(node) {
        const data = window.EVOLV.nodes.${nodeName}.menuData.position;
        const sel  = document.getElementById('node-input-positionVsParent');
        if (!sel) return;
        sel.innerHTML = '';
        (data.positionGroups||[]).forEach(grp => {
          const optg = document.createElement('optgroup');
          optg.label = grp.group;
          grp.options.forEach(o=>{
            const opt = document.createElement('option');
            opt.value = o.value;
            opt.textContent = o.label;
            optg.appendChild(opt);
          });
          sel.appendChild(optg);
        });
        // default to “atEquipment” if not set
        sel.value = node.positionVsParent || 'atEquipment';
      };
    `;
  }

  // 5) (no special events needed, but stub for symmetry)
  getEventInjectionCode(nodeName) {
    return `
      // PhysicalPosition events for ${nodeName}
      window.EVOLV.nodes.${nodeName}.positionMenu.wireEvents = function(node) {
        // no dynamic behavior
      };
    `;
  }

  // 6) Save-logic injector
  getSaveInjectionCode(nodeName) {
    return `
      // PhysicalPosition Save injection for ${nodeName}
      window.EVOLV.nodes.${nodeName}.positionMenu.saveEditor = function(node) {
        const sel = document.getElementById('node-input-positionVsParent');
        node.positionVsParent = sel? sel.value : 'atEquipment';
        return true;
      };
    `;
  }

  // 7) Compose everything into one client bundle
  getClientInitCode(nodeName) {
    const htmlCode   = this.getHtmlInjectionCode(nodeName);
    const dataCode   = this.getDataInjectionCode(nodeName);
    const eventCode  = this.getEventInjectionCode(nodeName);
    const saveCode   = this.getSaveInjectionCode(nodeName);

    return `
      // --- PhysicalPositionMenu for ${nodeName} ---
      window.EVOLV.nodes.${nodeName}.positionMenu =
        window.EVOLV.nodes.${nodeName}.positionMenu || {};

      ${htmlCode}
      ${dataCode}
      ${eventCode}
      ${saveCode}

      // hook into oneditprepare
      window.EVOLV.nodes.${nodeName}.positionMenu.initEditor = function(node) {
        this.injectHtml();
        this.loadData(node);
        this.wireEvents(node);
      };
    `;
  }
}

module.exports = PhysicalPositionMenu;