const prevImageBtn = document.getElementById("prevImageBtn");
const nextImageBtn = document.getElementById("nextImageBtn");
const currentImageNameEl = document.getElementById("currentImageName");
const saveImageNavBtn = document.getElementById("saveImageBtn");
const canvas = document.getElementById("imageCanvas");
const ctx = canvas ? canvas.getContext("2d") : null;
const saveBtn = document.getElementById("saveCropBtn");
const addSelectionBtn = document.getElementById("addSelectionBtn");
const clearAllSelectionsBtn = document.getElementById("clearAllSelectionsBtn");
const selectionsListEl = document.getElementById("selectionsList");
const statusEl = document.getElementById("status");
const modeInputs = document.querySelectorAll('input[name="mode"]');
const clearSelectionBtn = document.getElementById("clearSelectionBtn");
const titleInput = document.getElementById("title_de");
const positionInput = document.getElementById("position_de");
const actionInput = document.getElementById("action_de");
const conditionInput = document.getElementById("condition_de");
const objectsListEl = document.getElementById("objectsList");
const objectsTagsEl = document.getElementById("objectsTags");
const generateDetailsBtn = document.getElementById("generateDetailsBtn");
const generateSentenceBtn = document.getElementById("generateSentenceBtn");
const detailTitleEl = document.getElementById("detailTitle");
const detailPositionEl = document.getElementById("detailPosition");
const detailActionEl = document.getElementById("detailAction");
const detailConditionEl = document.getElementById("detailCondition");
const detailHierarchyEl = document.getElementById("detailHierarchy");
const detailParentEl = document.getElementById("detailParent");
const detailLabelEnEl = document.getElementById("detailLabelEn");
const detailLabelDeEl = document.getElementById("detailLabelDe");
const detailLabelSeEl = document.getElementById("detailLabelSe");
const detailColorEnEl = document.getElementById("detailColorEn");
const detailAdjectiveEnEl = document.getElementById("detailAdjectiveEn");
const detailActionVerbEnEl = document.getElementById("detailActionVerbEn");
const detailPrepositionEnEl = document.getElementById("detailPrepositionEn");
const detailRelativePositionEnEl = document.getElementById("detailRelativePositionEn");
const detailSeasonEnEl = document.getElementById("detailSeasonEn");
const detailSentenceQuestionSimpleEl = document.getElementById("detailSentenceQuestionSimple");
const detailSentenceAnswerSimpleEl = document.getElementById("detailSentenceAnswerSimple");
const detailSentenceQuestionAdvancedEl = document.getElementById("detailSentenceQuestionAdvanced");
const detailSentenceAnswerAdvancedEl = document.getElementById("detailSentenceAnswerAdvanced");
const sentencesListEl = document.getElementById("sentencesList");

let currentImage = null;
let currentFilename = null;

let isDragging = false;
let startX = 0;
let startY = 0;
let currentX = 0;
let currentY = 0;
let displayScale = 1; // Verhältnis: Canvas-Größe zu Originalbild

let mode = "rect"; // "rect" oder "polygon"
let polygonPoints = [];
let isPolygonClosed = false;
let currentObjects = []; // gespeicherte Objekte (Ausschnitte) zum aktuellen Bild
let selectedObjectId = null;
let currentSelections = []; // Gesammelte Auswahlen für das aktuelle Objekt

let imageList = Array.isArray(window.initialImages) ? window.initialImages : [];
let currentImageIndex =
  typeof window.initialImageIndex === "number" ? window.initialImageIndex : imageList.length ? imageList.length - 1 : -1;
const isGeneratePage = window.isGeneratePage === true;

function setStatus(text, isError = false) {
  if (!statusEl) {
    // Auf Seiten ohne Status-Element (z.B. GenerateIt) nur in der Konsole loggen
    if (text) {
      console[isError ? "error" : "log"](text);
    }
    return;
  }
  statusEl.textContent = text;
  statusEl.className = isError ? "status error" : "status ok";
}

function updateDetailsPanel(obj) {
  if (!detailTitleEl) return; // Nur auf GenerateIt vorhanden
  if (!obj) {
    detailTitleEl.textContent = "";
    detailPositionEl.textContent = "";
    detailActionEl.textContent = "";
    detailConditionEl.textContent = "";
    detailHierarchyEl.textContent = "";
    detailParentEl.textContent = "";
    if (detailLabelEnEl) {
      detailLabelEnEl.textContent = "";
      detailLabelDeEl.textContent = "";
      detailLabelSeEl.textContent = "";
      detailColorEnEl.textContent = "";
      detailAdjectiveEnEl.textContent = "";
      detailActionVerbEnEl.textContent = "";
      detailPrepositionEnEl.textContent = "";
      detailRelativePositionEnEl.textContent = "";
      detailSeasonEnEl.textContent = "";
    }
    if (detailSentenceQuestionSimpleEl) detailSentenceQuestionSimpleEl.textContent = "";
    if (detailSentenceAnswerSimpleEl) detailSentenceAnswerSimpleEl.textContent = "";
    if (detailSentenceQuestionAdvancedEl) detailSentenceQuestionAdvancedEl.textContent = "";
    if (detailSentenceAnswerAdvancedEl) detailSentenceAnswerAdvancedEl.textContent = "";
    return;
  }
  // Debug: prüfen, welches Objekt gerade angezeigt werden soll
  try {
    console.log("updateDetailsPanel für Objekt:", obj.id, obj);
  } catch (e) {
    console.log("updateDetailsPanel aufgerufen", obj);
  }
  detailTitleEl.textContent = obj.title_de || "";
  detailPositionEl.textContent = obj.position_de || "";
  detailActionEl.textContent = obj.action_de || "";
  detailConditionEl.textContent = obj.condition_de || "";
  detailHierarchyEl.textContent = obj.hierarchy != null ? String(obj.hierarchy) : "";
  // Parent-Index und Name: anhand der index-Eigenschaft und title_de des Parent-Objekts bestimmen
  let parentDisplay = "";
  if (obj.parent_id && Array.isArray(currentObjects)) {
    const parent = currentObjects.find((o) => o.id === obj.parent_id);
    if (parent && typeof parent.index === "number") {
      const parentName = parent.title_de || "ohne Titel";
      parentDisplay = `${parent.index} - ${parentName}`;
    }
  }
  detailParentEl.textContent = parentDisplay;

  if (detailLabelEnEl) {
    detailLabelEnEl.textContent = obj.label_en || "";
    if (detailLabelDeEl) detailLabelDeEl.textContent = obj.label_de || "";
    if (detailLabelSeEl) detailLabelSeEl.textContent = obj.label_se || "";
    if (detailColorEnEl) detailColorEnEl.textContent = obj.color_en || "";
    if (detailAdjectiveEnEl) detailAdjectiveEnEl.textContent = obj.adjective_en || "";
    if (detailActionVerbEnEl) detailActionVerbEnEl.textContent = obj.action_verb_en || "";
    if (detailPrepositionEnEl) detailPrepositionEnEl.textContent = obj.preposition_en || "";
    if (detailRelativePositionEnEl) detailRelativePositionEnEl.textContent = obj.relative_position_en || "";
    if (detailSeasonEnEl) detailSeasonEnEl.textContent = obj.season_en || "";
  }
  if (detailSentenceQuestionSimpleEl && obj.latest_sentence) {
    detailSentenceQuestionSimpleEl.textContent = obj.latest_sentence.question_simple_en || "";
    detailSentenceAnswerSimpleEl.textContent = obj.latest_sentence.answer_simple_en || "";
    detailSentenceQuestionAdvancedEl.textContent = obj.latest_sentence.question_advanced_en || "";
    detailSentenceAnswerAdvancedEl.textContent = obj.latest_sentence.answer_advanced_en || "";
  }
}

function clearCanvas() {
  if (!ctx || !canvas) return;
  ctx.clearRect(0, 0, canvas.width, canvas.height);
}

function drawImageAndSelection() {
  if (!currentImage || !ctx || !canvas) return;
  clearCanvas();
  // Bild vollständig in der aktuellen Canvas-Größe zeichnen (skaliert, ohne Beschnitt)
  ctx.drawImage(currentImage, 0, 0, canvas.width, canvas.height);

  // Gespeicherte Objekte als farbige Rahmen/Polygone einzeichnen
  if (currentObjects && currentObjects.length > 0) {
    for (const obj of currentObjects) {
      if (!obj.visible) continue;
      const bbox = obj.bbox;
      const polygon = obj.polygon;
      const hierarchy = obj.hierarchy || 1;
       const isSelected = selectedObjectId && obj.id === selectedObjectId;
      const indexLabel = typeof obj.index === "number" ? String(obj.index) : "";

      ctx.save();
      // Linien- und Füllfarbe nach Hierarchie
      let stroke = "#14532d";
      let fill = "rgba(20, 83, 45, 0.2)"; // Fallback
      if (hierarchy === 1) {
        stroke = "#6b7280"; // grau
        fill = "rgba(107, 114, 128, 0.2)"; // 20 %
      } else if (hierarchy === 2) {
        stroke = "#eab308"; // gelb
        fill = "rgba(234, 179, 8, 0.3)"; // 30 %
      } else if (hierarchy === 3) {
        stroke = "#dc2626"; // rot
        fill = "rgba(220, 38, 38, 0.3)"; // 30 %
      }
      ctx.strokeStyle = stroke;
      ctx.fillStyle = fill;
      ctx.lineWidth = isSelected ? 3 : 2;
      ctx.setLineDash(isSelected ? [2, 2] : [4, 3]);

      if (polygon && Array.isArray(polygon) && polygon.length >= 3) {
        ctx.beginPath();
        ctx.moveTo(polygon[0].x * displayScale, polygon[0].y * displayScale);
        for (let i = 1; i < polygon.length; i++) {
          ctx.lineTo(polygon[i].x * displayScale, polygon[i].y * displayScale);
        }
        ctx.closePath();
        ctx.fill();
        ctx.stroke();
      } else if (bbox) {
        const bx = bbox.x * displayScale;
        const by = bbox.y * displayScale;
        const bw = bbox.width * displayScale;
        const bh = bbox.height * displayScale;
        ctx.fillRect(bx, by, bw, bh);
        ctx.strokeRect(bx, by, bw, bh);
      }

      // Zusätzlicher weißer Rand für hervorgehobenes Objekt
      if (isSelected) {
        ctx.strokeStyle = "#ffffff";
        ctx.lineWidth = 2;
        ctx.setLineDash([]);
        if (polygon && Array.isArray(polygon) && polygon.length >= 3) {
          ctx.beginPath();
          ctx.moveTo(polygon[0].x * displayScale, polygon[0].y * displayScale);
          for (let i = 1; i < polygon.length; i++) {
            ctx.lineTo(polygon[i].x * displayScale, polygon[i].y * displayScale);
          }
          ctx.closePath();
          ctx.stroke();
        } else if (bbox) {
          const bx = bbox.x * displayScale;
          const by = bbox.y * displayScale;
          const bw = bbox.width * displayScale;
          const bh = bbox.height * displayScale;
          ctx.strokeRect(bx, by, bw, bh);
        }
      }

      // Index-Zahl in der Mitte des Objekts anzeigen
      if (indexLabel) {
        let centerX;
        let centerY;
        if (bbox) {
          centerX = (bbox.x + bbox.width / 2) * displayScale;
          centerY = (bbox.y + bbox.height / 2) * displayScale;
        } else if (polygon && Array.isArray(polygon) && polygon.length > 0) {
          const xs = polygon.map((p) => p.x);
          const ys = polygon.map((p) => p.y);
          centerX = (Math.min(...xs) + Math.max(...xs)) / 2 * displayScale;
          centerY = (Math.min(...ys) + Math.max(...ys)) / 2 * displayScale;
        }
        if (centerX != null && centerY != null) {
          ctx.save();
          ctx.font = "bold 12px system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif";
          ctx.textAlign = "center";
          ctx.textBaseline = "middle";
          // dunkler Hintergrundkreis
          ctx.fillStyle = "rgba(15, 23, 42, 0.7)";
          ctx.beginPath();
          ctx.arc(centerX, centerY, 10, 0, Math.PI * 2);
          ctx.fill();
          // weiße Zahl
          ctx.fillStyle = "#ffffff";
          ctx.fillText(indexLabel, centerX, centerY + 0.5);
          ctx.restore();
        }
      }
      ctx.restore();
    }
  }

  if (mode === "rect") {
    if (isDragging || (startX !== currentX && startY !== currentY)) {
      const x = Math.min(startX, currentX);
      const y = Math.min(startY, currentY);
      const w = Math.abs(currentX - startX);
      const h = Math.abs(currentY - startY);

      if (w > 0 && h > 0) {
        ctx.save();
        ctx.strokeStyle = "#f97316"; // Neon-Orange für neue Objekte
        ctx.fillStyle = "rgba(249, 115, 22, 0.3)"; // 30 % Füllung
        ctx.lineWidth = 2;
        ctx.setLineDash([6, 4]);
        ctx.fillRect(x, y, w, h);
        ctx.strokeRect(x, y, w, h);
        ctx.restore();
      }
    }
  } else if (mode === "polygon") {
    if (polygonPoints.length > 0) {
      ctx.save();
      ctx.strokeStyle = "#f97316"; // Neon-Orange für neue Objekte
      ctx.fillStyle = "rgba(249, 115, 22, 0.3)"; // 30 % Füllung
      ctx.lineWidth = 2;
      ctx.setLineDash([]);

      ctx.beginPath();
      ctx.moveTo(polygonPoints[0].x, polygonPoints[0].y);
      for (let i = 1; i < polygonPoints.length; i++) {
        ctx.lineTo(polygonPoints[i].x, polygonPoints[i].y);
      }
      if (!isPolygonClosed && isDragging) {
        // Vorschau-Linie zur aktuellen Mausposition
        ctx.lineTo(currentX, currentY);
      }

      if (isPolygonClosed) {
        ctx.closePath();
        ctx.fill();
      }
      ctx.stroke();

      // Punkte markieren
      for (const p of polygonPoints) {
        ctx.beginPath();
        ctx.arc(p.x, p.y, 3, 0, Math.PI * 2);
        ctx.fillStyle = "#ea580c";
        ctx.fill();
      }

      ctx.restore();
    }
  }
}

function resetSelection() {
  isDragging = false;
  startX = startY = currentX = currentY = 0;
  polygonPoints = [];
  isPolygonClosed = false;
  if (addSelectionBtn) {
    addSelectionBtn.disabled = true;
  }
  drawImageAndSelection();
}

// Funktion zum Rendern der Auswahlen-Liste
function renderSelectionsList() {
  if (!selectionsListEl) return;
  
  if (!currentSelections || currentSelections.length === 0) {
    selectionsListEl.innerHTML = '<div class="selections-empty">Noch keine Auswahlen hinzugefügt.</div>';
    if (saveBtn) {
      saveBtn.disabled = true;
    }
    return;
  }
  
  selectionsListEl.innerHTML = currentSelections.map((sel, idx) => {
    const num = idx + 1;
    if (sel.mode === "rect") {
      return `
        <div class="selection-item">
          <strong>Auswahl ${num}</strong> (Rechteck): 
          x=${sel.bbox.x}, y=${sel.bbox.y}, w=${sel.bbox.width}, h=${sel.bbox.height}
        </div>
      `;
    } else {
      return `
        <div class="selection-item">
          <strong>Auswahl ${num}</strong> (Polygon): 
          ${sel.polygon ? sel.polygon.length + " Punkte" : "–"}
        </div>
      `;
    }
  }).join("");
  
  if (saveBtn) {
    saveBtn.disabled = !currentFilename || currentSelections.length === 0;
  }
}

// Auswahl zur Liste hinzufügen
function addCurrentSelection() {
  if (!currentFilename) return;
  
  let selection = null;
  
  if (mode === "rect") {
    const w = Math.abs(currentX - startX);
    const h = Math.abs(currentY - startY);
    if (w <= 0 || h <= 0) {
      setStatus("Bitte zuerst einen Rechteck-Bereich auswählen.", true);
      return;
    }
    const x = Math.min(startX, currentX);
    const y = Math.min(startY, currentY);
    selection = {
      mode: "rect",
      bbox: {
        x: Math.round(x / displayScale),
        y: Math.round(y / displayScale),
        width: Math.round(w / displayScale),
        height: Math.round(h / displayScale),
      },
    };
  } else if (mode === "polygon") {
    if (!isPolygonClosed || polygonPoints.length < 3) {
      setStatus("Bitte Polygon mit Doppelklick schließen (mind. 3 Punkte).", true);
      return;
    }
    selection = {
      mode: "polygon",
      polygon: polygonPoints.map((p) => ({
        x: Math.round(p.x / displayScale),
        y: Math.round(p.y / displayScale),
      })),
    };
  }
  
  if (selection) {
    currentSelections.push(selection);
    renderSelectionsList();
    resetSelection();
    setStatus(`Auswahl ${currentSelections.length} hinzugefügt.`);
  }
}

async function loadObjectsForCurrentImage() {
  if (!currentFilename) {
    currentObjects = [];
    if (objectsListEl) objectsListEl.innerHTML = "";
    if (objectsTagsEl) objectsTagsEl.innerHTML = "";
    selectedObjectId = null;
    updateDetailsPanel(null);
    return;
  }
  try {
    const res = await fetch(`/api/objects?filename=${encodeURIComponent(currentFilename)}`);
    if (!res.ok) {
      throw new Error("Fehler beim Laden der Objekte");
    }
    const data = await res.json();
    const objects = (data.objects || []).map((o) => ({
      ...o,
      visible: true,
    }));
    currentObjects = objects;
    if (!selectedObjectId && objects.length > 0) {
      selectedObjectId = objects[0].id;
    }
    if (!objectsListEl) {
      // Auf Seiten ohne Liste (falls später nötig)
      if (isGeneratePage && objects.length > 0) {
        updateDetailsPanel(objects[0]);
      }
      return;
    }

    if (objects.length === 0) {
      objectsListEl.innerHTML = '<div class="object-item-text">Noch keine Objekte gespeichert.</div>';
      if (objectsTagsEl) objectsTagsEl.innerHTML = "";
      updateDetailsPanel(null);
      return;
    }

    objectsListEl.innerHTML = "";
    if (objectsTagsEl) objectsTagsEl.innerHTML = "";
    for (const obj of objects) {
      const wrapper = document.createElement("div");
      wrapper.className = "object-item";

      const header = document.createElement("div");
      header.className = "object-item-header";

      if (!isGeneratePage) {
        const checkbox = document.createElement("input");
        checkbox.type = "checkbox";
        checkbox.checked = true;
        checkbox.addEventListener("click", (ev) => {
          ev.stopPropagation();
          const found = currentObjects.find((o) => o.id === obj.id);
          if (found) {
            found.visible = checkbox.checked;
            drawImageAndSelection();
          }
        });
        header.appendChild(checkbox);
      }

      const img = document.createElement("img");
      if (obj.image_file) {
        img.src = `/objects_image/${encodeURIComponent(obj.image_file)}`;
        img.alt = obj.title_de || obj.id || "";
      }

      const select = document.createElement("select");
      select.className = "object-hierarchy-select";
      [1, 2, 3].forEach((level) => {
        const opt = document.createElement("option");
        opt.value = String(level);
        opt.textContent = String(level);
        if ((obj.hierarchy || 1) === level) {
          opt.selected = true;
        }
        select.appendChild(opt);
      });
      select.addEventListener("click", (ev) => ev.stopPropagation());
      select.addEventListener("change", async () => {
        const newVal = parseInt(select.value, 10);
        const found = currentObjects.find((o) => o.id === obj.id);
        if (found) {
          found.hierarchy = newVal;
        }
        try {
          await fetch(`/api/object/${encodeURIComponent(obj.id)}/hierarchy`, {
            method: "POST",
            headers: { "Content-Type": "application/json" },
            body: JSON.stringify({ hierarchy: newVal }),
          });
        } catch (err) {
          console.error("Fehler beim Speichern der Hierarchie", err);
        }
        drawImageAndSelection();
      });

      const parentSelect = document.createElement("select");
      parentSelect.className = "object-parent-select";
      const noneOpt = document.createElement("option");
      noneOpt.value = "";
      noneOpt.textContent = "-";
      parentSelect.appendChild(noneOpt);
      for (const other of objects) {
        if (other.id === obj.id) continue;
        const opt = document.createElement("option");
        opt.value = other.id;
        opt.textContent = String(other.index);
        if (obj.parent_id && obj.parent_id === other.id) {
          opt.selected = true;
        }
        parentSelect.appendChild(opt);
      }
      parentSelect.addEventListener("click", (ev) => ev.stopPropagation());
      parentSelect.addEventListener("change", async () => {
        const value = parentSelect.value || null;
        const found = currentObjects.find((o) => o.id === obj.id);
        if (found) {
          found.parent_id = value;
        }
        try {
          await fetch(`/api/object/${encodeURIComponent(obj.id)}/parent`, {
            method: "POST",
            headers: { "Content-Type": "application/json" },
            body: JSON.stringify({ parent_id: value }),
          });
        } catch (err) {
          console.error("Fehler beim Speichern der Parent-Relation", err);
        }
      });

      const text = document.createElement("div");
      text.className = "object-item-text";
      const title = document.createElement("strong");
      title.textContent = obj.title_de || obj.id || "Ohne Titel";
      const subtitle = document.createElement("span");
      subtitle.textContent = obj.position_de || "";

      text.appendChild(title);
      if (subtitle.textContent) text.appendChild(subtitle);

      header.appendChild(img);
      header.appendChild(select);
      header.appendChild(parentSelect);
      header.appendChild(text);

      wrapper.appendChild(header);

      if (!isGeneratePage) {
        const details = document.createElement("div");
        details.className = "object-item-details";

        const makeRow = (labelText, key, placeholder = "") => {
          const row = document.createElement("div");
          const label = document.createElement("label");
          label.textContent = labelText;
          const input = document.createElement("input");
          input.type = "text";
          input.value = obj[key] || "";
          if (placeholder) input.placeholder = placeholder;
          input.addEventListener("click", (ev) => ev.stopPropagation());
          input.addEventListener("change", () => {
            const found = currentObjects.find((o) => o.id === obj.id);
            if (found) found[key] = input.value;
          });
          row.appendChild(label);
          row.appendChild(input);
          return { row, input };
        };

        const { row: titleRow, input: titleInputLocal } = makeRow("Titel", "title_de");
        const { row: posRow, input: posInputLocal } = makeRow("Position", "position_de");
        const { row: actionRow, input: actionInputLocal } = makeRow("Status", "action_de", "z.B. sitzt");
        const { row: condRow, input: condInputLocal } = makeRow("Zustand", "condition_de", "z.B. rostig");

        const saveBtn = document.createElement("button");
        saveBtn.type = "button";
        saveBtn.className = "object-icon-button";
        saveBtn.textContent = "💾";
        saveBtn.addEventListener("click", async (ev) => {
          ev.stopPropagation();
          const payload = {
            title_de: titleInputLocal.value,
            position_de: posInputLocal.value,
            action_de: actionInputLocal.value,
            condition_de: condInputLocal.value,
          };
          try {
            await fetch(`/api/object/${encodeURIComponent(obj.id)}`, {
              method: "POST",
              headers: { "Content-Type": "application/json" },
              body: JSON.stringify(payload),
            });
            const found = currentObjects.find((o) => o.id === obj.id);
            if (found) {
              Object.assign(found, payload);
            }
            // Text im Header aktualisieren
            title.textContent = payload.title_de || obj.id || "Ohne Titel";
            subtitle.textContent = payload.position_de || "";
            // Details wieder schließen
            details.classList.remove("visible");
          } catch (err) {
            console.error("Fehler beim Speichern der Objekt-Metadaten", err);
          }
        });

        details.appendChild(titleRow);
        details.appendChild(posRow);
        details.appendChild(actionRow);
        details.appendChild(condRow);
        details.appendChild(saveBtn);

        wrapper.appendChild(details);

        const editBtn = document.createElement("button");
        editBtn.type = "button";
        editBtn.className = "object-icon-button";
        editBtn.textContent = "📝";
        editBtn.addEventListener("click", (ev) => {
          ev.stopPropagation();
          selectedObjectId = obj.id;
          drawImageAndSelection();
          details.classList.toggle("visible");
        });

        header.appendChild(editBtn);
      }

      wrapper.addEventListener("click", () => {
        selectedObjectId = obj.id;
        drawImageAndSelection();
        if (isGeneratePage) {
          updateDetailsPanel(obj);
          loadSentencesForObject(obj.id);
        }
      });

      objectsListEl.appendChild(wrapper);
    }

    // Tags mit allen Objektnamen unter der Liste
    if (objectsTagsEl) {
      for (const obj of objects) {
        const tag = document.createElement("span");
        tag.className = "object-tag";
        tag.textContent = obj.title_de || obj.id || "Ohne Titel";
        objectsTagsEl.appendChild(tag);
      }
    }

    // Standard: erstes Objekt im Detail anzeigen (GenerateIt)
    if (isGeneratePage && objects.length > 0) {
      const first = objects[0];
      if (!selectedObjectId) {
        selectedObjectId = first.id;
      }
      updateDetailsPanel(first);
      loadSentencesForObject(first.id);
    }
  } catch (e) {
    console.error(e);
  }
}

modeInputs.forEach((input) => {
  input.addEventListener("change", () => {
    mode = input.value;
    resetSelection();
  });
});

if (clearSelectionBtn) {
  clearSelectionBtn.addEventListener("click", () => {
    resetSelection();
  });
}

function updateImageNav() {
  const hasImages = imageList.length > 0 && currentImageIndex >= 0;
  if (currentImageNameEl) {
    currentImageNameEl.textContent = hasImages ? imageList[currentImageIndex] : "–";
  }
  if (prevImageBtn) {
    prevImageBtn.disabled = !hasImages || currentImageIndex <= 0;
  }
  if (nextImageBtn) {
    nextImageBtn.disabled = !hasImages || currentImageIndex >= imageList.length - 1;
  }
  if (saveImageNavBtn) {
    saveImageNavBtn.disabled = !hasImages;
  }
}

function loadCurrentImage() {
  if (!imageList.length || currentImageIndex < 0 || currentImageIndex >= imageList.length) {
    currentFilename = null;
    currentImage = null;
    clearCanvas();
    updateImageNav();
    loadObjectsForCurrentImage();
    return;
  }

  const filename = imageList[currentImageIndex];
  currentFilename = filename;
  if (saveBtn) {
    saveBtn.disabled = true;
  }
  setStatus("");
  clearCanvas();
  updateImageNav();

  if (!canvas || !ctx) {
    // Kein Canvas vorhanden (z.B. GenerateIt) -> nur Objekte laden
    currentImage = null;
    loadObjectsForCurrentImage();
    return;
  }

  const img = new Image();
  img.onload = () => {
    currentImage = img;
    // Bild so skalieren, dass es in die verfügbare Fläche passt (Breite + Höhe)
    const wrapper = canvas.parentElement;
    const maxWidth = wrapper.clientWidth - 16;
    const maxHeight = window.innerHeight * 0.7;
    const scale = Math.min(maxWidth / img.width, maxHeight / img.height, 1);
    displayScale = isFinite(scale) && scale > 0 ? scale : 1;

    canvas.width = img.width * displayScale;
    canvas.height = img.height * displayScale;
    resetSelection();
    drawImageAndSelection();
    loadObjectsForCurrentImage();
  };
  img.onerror = () => {
    setStatus("Fehler beim Laden des Bildes.", true);
  };
  img.src = `/pictures/${encodeURIComponent(filename)}`;
}

if (prevImageBtn) {
  prevImageBtn.addEventListener("click", () => {
    if (currentImageIndex > 0) {
      currentImageIndex -= 1;
      loadCurrentImage();
    }
  });
}

if (nextImageBtn) {
  nextImageBtn.addEventListener("click", () => {
    if (currentImageIndex < imageList.length - 1) {
      currentImageIndex += 1;
      loadCurrentImage();
    }
  });
}

if (saveImageNavBtn) {
  saveImageNavBtn.addEventListener("click", async () => {
    if (!currentFilename) return;
    try {
      setStatus("Bild wird gespeichert ...");
      const res = await fetch("/api/image/save", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ filename: currentFilename }),
      });
      const data = await res.json();
      if (!res.ok) {
        setStatus(data.error || "Fehler beim Speichern des Bildes.", true);
        return;
      }
      // Seite neu laden, damit das Bild aus der Übersicht verschwindet
      window.location.href = "/draw";
    } catch (err) {
      console.error(err);
      setStatus("Netzwerk-/Serverfehler beim Bild-Speichern.", true);
    }
  });
}

// Initiales Bild laden (standardmäßig das zuletzt geänderte)
loadCurrentImage();

if (canvas) {
  canvas.addEventListener("mousedown", (e) => {
  if (!currentImage) return;
  const rect = canvas.getBoundingClientRect();
  const scaleX = canvas.width / rect.width;
  const scaleY = canvas.height / rect.height;

  const x = (e.clientX - rect.left) * scaleX;
  const y = (e.clientY - rect.top) * scaleY;

  if (mode === "rect") {
    startX = x;
    startY = y;
    currentX = startX;
    currentY = startY;
    isDragging = true;
  } else if (mode === "polygon") {
    if (isPolygonClosed) {
      // neue Polygon-Auswahl starten
      polygonPoints = [];
      isPolygonClosed = false;
    }
    polygonPoints.push({ x, y });
    isDragging = true;
  }
  drawImageAndSelection();
  });

  canvas.addEventListener("mousemove", (e) => {
  if (!currentImage) return;
  if (!isDragging) return;
  const rect = canvas.getBoundingClientRect();
  const scaleX = canvas.width / rect.width;
  const scaleY = canvas.height / rect.height;

  currentX = (e.clientX - rect.left) * scaleX;
  currentY = (e.clientY - rect.top) * scaleY;
  drawImageAndSelection();
  });

  canvas.addEventListener("mouseup", (e) => {
  if (!currentImage) return;
  isDragging = false;

  if (mode === "rect") {
    const w = Math.abs(currentX - startX);
    const h = Math.abs(currentY - startY);
    if (addSelectionBtn) {
      addSelectionBtn.disabled = w <= 0 || h <= 0 || !currentFilename;
    }
  } else if (mode === "polygon") {
    // Doppelklick = Polygon schließen
    if (e.detail === 2 && polygonPoints.length >= 3) {
      isPolygonClosed = true;
      if (addSelectionBtn) {
        addSelectionBtn.disabled = !currentFilename;
      }
    }
  }
  drawImageAndSelection();
  });

  canvas.addEventListener("mouseleave", () => {
  if (!currentImage) return;
  if (isDragging) {
    isDragging = false;
    drawImageAndSelection();
  }
  });
}

// Button: Auswahl hinzufügen
if (addSelectionBtn) {
  addSelectionBtn.addEventListener("click", () => {
    addCurrentSelection();
  });
}

// Button: Alle Auswahlen löschen
if (clearAllSelectionsBtn) {
  clearAllSelectionsBtn.addEventListener("click", () => {
    currentSelections = [];
    renderSelectionsList();
    resetSelection();
    setStatus("Alle Auswahlen gelöscht.");
  });
}

// Button: Objekt speichern (mit allen Auswahlen)
if (saveBtn) {
  saveBtn.addEventListener("click", async () => {
    if (!currentFilename || !canvas || !ctx) return;
    
    if (!currentSelections || currentSelections.length === 0) {
      setStatus("Bitte mindestens eine Auswahl hinzufügen.", true);
      return;
    }
    
    const payload = {
      filename: currentFilename,
      selections: currentSelections.map((sel, idx) => ({
        number: idx + 1,
        mode: sel.mode,
        bbox: sel.bbox || null,
        polygon: sel.polygon || null,
      })),
      title_de: titleInput ? titleInput.value || "" : "",
      position_de: positionInput ? positionInput.value || "" : "",
      action_de: actionInput ? actionInput.value || "" : "",
      condition_de: conditionInput ? conditionInput.value || "" : "",
    };

    try {
      setStatus("Speichere Objekt mit allen Auswahlen ...");
      const res = await fetch("/api/crop", {
        method: "POST",
        headers: {
          "Content-Type": "application/json",
        },
        body: JSON.stringify(payload),
      });

      const data = await res.json();
      if (!res.ok) {
        setStatus(data.error || "Unbekannter Fehler beim Speichern.", true);
        return;
      }

      // Backend liefert: { id, image_file, meta_file }
      setStatus(`Gespeichert – ID: ${data.id} (${currentSelections.length} Auswahlen)`);
      
      // Auswahlen zurücksetzen
      currentSelections = [];
      renderSelectionsList();
      resetSelection();
      
      // Metadaten-Felder leeren
      if (titleInput) titleInput.value = "";
      if (positionInput) positionInput.value = "";
      if (actionInput) actionInput.value = "";
      if (conditionInput) conditionInput.value = "";
      
      // Liste der Objekte aktualisieren
      loadObjectsForCurrentImage();
    } catch (err) {
      console.error(err);
      setStatus("Netzwerk-/Serverfehler beim Speichern.", true);
    }
  });
}

// KI‑Details für aktuelles Objekt auf GenerateIt erzeugen
if (generateDetailsBtn) {
  generateDetailsBtn.addEventListener("click", async () => {
    if (!currentObjects.length) {
      alert("Keine Objekte für dieses Bild vorhanden.");
      return;
    }
    let target = currentObjects.find((o) => o.id === selectedObjectId);
    if (!target) {
      target = currentObjects[0];
      selectedObjectId = target.id;
    }

    generateDetailsBtn.disabled = true;
    const originalText = generateDetailsBtn.textContent;
    generateDetailsBtn.textContent = "⏳ KI‑Details...";

    try {
      const res = await fetch(`/api/object/${encodeURIComponent(target.id)}/generate_details`, {
        method: "POST",
      });
      const data = await res.json();
      if (!res.ok) {
        console.error("Fehler von /generate_details:", data);
        alert(data.error || "Fehler beim Generieren der KI‑Details.");
        return;
      }

      // Objekt in currentObjects aktualisieren
      const found = currentObjects.find((o) => o.id === target.id);
      if (found) {
        console.log("KI-Details erhalten:", data);
        Object.assign(found, data);
        console.log("Objekt nach Update:", found);
        updateDetailsPanel(found);
      } else {
        console.error("Objekt nicht in currentObjects gefunden:", target.id);
      }
    } catch (err) {
      console.error("Netzwerkfehler bei generate_details", err);
      alert("Netzwerkfehler beim Aufruf der KI.");
    } finally {
      generateDetailsBtn.disabled = false;
      generateDetailsBtn.textContent = originalText;
    }
  });
}

// Sätze für ein Objekt von der API laden und im Panel anzeigen
async function loadSentencesForObject(objectId) {
  if (!isGeneratePage) return;
  try {
    const res = await fetch(`/api/object/${encodeURIComponent(objectId)}/sentences`);
    if (!res.ok) return;
    const data = await res.json();
    const sentences = Array.isArray(data.sentences) ? data.sentences : [];
    
    // Neuesten Satz in der KI-Sentence-Sektion anzeigen
    if (detailSentenceQuestionSimpleEl && detailSentenceAnswerSimpleEl && detailSentenceQuestionAdvancedEl && detailSentenceAnswerAdvancedEl) {
      if (!sentences.length) {
        detailSentenceQuestionSimpleEl.textContent = "";
        detailSentenceAnswerSimpleEl.textContent = "";
        detailSentenceQuestionAdvancedEl.textContent = "";
        detailSentenceAnswerAdvancedEl.textContent = "";
      } else {
        const last = sentences[sentences.length - 1];
        detailSentenceQuestionSimpleEl.textContent = last.question_simple_en || "";
        detailSentenceAnswerSimpleEl.textContent = last.answer_simple_en || "";
        detailSentenceQuestionAdvancedEl.textContent = last.question_advanced_en || "";
        detailSentenceAnswerAdvancedEl.textContent = last.answer_advanced_en || "";
        const found = currentObjects.find((o) => o.id === objectId);
        if (found) {
          found.latest_sentence = last;
        }
      }
    }
    
    // Alle Sätze in der Liste anzeigen
    renderSentencesList(sentences);
  } catch (err) {
    console.error("Fehler beim Laden der Sätze", err);
    if (sentencesListEl) {
      sentencesListEl.innerHTML = '<div class="sentence-item-empty">Fehler beim Laden der Sätze.</div>';
    }
  }
}

// Funktion zum Rendern der Sätze-Liste
function renderSentencesList(sentences) {
  if (!sentencesListEl) return;
  
  if (!sentences || sentences.length === 0) {
    sentencesListEl.innerHTML = '<div class="sentence-item-empty">Noch keine Sätze vorhanden.</div>';
    return;
  }
  
  // Sätze in umgekehrter Reihenfolge anzeigen (neueste zuerst)
  const reversed = [...sentences].reverse();
  sentencesListEl.innerHTML = reversed.map((sentence, idx) => {
    const questionSimple = sentence.question_simple_en || "";
    const answerSimple = sentence.answer_simple_en || "";
    const questionAdvanced = sentence.question_advanced_en || "";
    const answerAdvanced = sentence.answer_advanced_en || "";
    return `
      <div class="sentence-item">
        <div style="font-weight: 600; color: #1e40af; margin-bottom: 4px; font-size: 0.85rem;">Einfach:</div>
        <div class="sentence-item-question">${escapeHtml(questionSimple)}</div>
        <div class="sentence-item-answer">${escapeHtml(answerSimple)}</div>
        <div style="font-weight: 600; color: #1e40af; margin-top: 8px; margin-bottom: 4px; font-size: 0.85rem;">Fortgeschritten:</div>
        <div class="sentence-item-question">${escapeHtml(questionAdvanced)}</div>
        <div class="sentence-item-answer">${escapeHtml(answerAdvanced)}</div>
      </div>
    `;
  }).join("");
}

// Hilfsfunktion zum Escapen von HTML
function escapeHtml(text) {
  const div = document.createElement("div");
  div.textContent = text;
  return div.innerHTML;
}

// KI‑Sentence für aktuelles Objekt auf GenerateIt erzeugen
if (generateSentenceBtn) {
  generateSentenceBtn.addEventListener("click", async () => {
    if (!currentObjects.length) {
      alert("Keine Objekte für dieses Bild vorhanden.");
      return;
    }
    let target = currentObjects.find((o) => o.id === selectedObjectId);
    if (!target) {
      target = currentObjects[0];
      selectedObjectId = target.id;
    }

    generateSentenceBtn.disabled = true;
    const originalText = generateSentenceBtn.textContent;
    generateSentenceBtn.textContent = "⏳ KI‑Sentence...";

    try {
      const res = await fetch(`/api/object/${encodeURIComponent(target.id)}/generate_sentence`, {
        method: "POST",
      });
      const data = await res.json();
      if (!res.ok) {
        console.error("Fehler von /generate_sentence:", data);
        alert(data.error || "Fehler beim Generieren der KI‑Sentence.");
        return;
      }

      if (data.sentence) {
        if (detailSentenceQuestionSimpleEl) detailSentenceQuestionSimpleEl.textContent = data.sentence.question_simple_en || "";
        if (detailSentenceAnswerSimpleEl) detailSentenceAnswerSimpleEl.textContent = data.sentence.answer_simple_en || "";
        if (detailSentenceQuestionAdvancedEl) detailSentenceQuestionAdvancedEl.textContent = data.sentence.question_advanced_en || "";
        if (detailSentenceAnswerAdvancedEl) detailSentenceAnswerAdvancedEl.textContent = data.sentence.answer_advanced_en || "";
        const found = currentObjects.find((o) => o.id === target.id);
        if (found) {
          found.latest_sentence = data.sentence;
        }
        // Sätze neu laden, um die Liste zu aktualisieren
        await loadSentencesForObject(target.id);
      }
    } catch (err) {
      console.error("Netzwerkfehler bei generate_sentence", err);
      alert("Netzwerkfehler beim Aufruf der KI‑Sentence.");
    } finally {
      generateSentenceBtn.disabled = false;
      generateSentenceBtn.textContent = originalText;
    }
  });
}