feat: 2 columns web for structure

src/screens/Writing/CustomizeSongStructure.web.js

@@ -7,6 +7,7 @@ import React, {
 } from "react";
 import {
   Image,
+  Pressable,
   ScrollView,
   StyleSheet,
   Text,
@@ -28,6 +29,29 @@ import CreateLyricsHeader from "./components/CreateLyricsHeader";
 
 const ROW_HEIGHT = 54;
 
+const PALETTE_SEGMENT_OVERRIDES = [
+  {
+    type: "pont",
+    description:
+      "Transition contrastée qui relance l’énergie avant d’entrer dans la dernière partie.",
+  },
+  {
+    type: "interlude_melodique",
+    description:
+      "Respiration instrumentale qui met la mélodie à l’honneur sans paroles.",
+  },
+  {
+    type: "final_apogee",
+    description:
+      "Clôture apothéose qui amplifie l’émotion pour un final impactant.",
+  },
+  {
+    type: "fade_out",
+    description:
+      "Sortie progressive où le morceau disparaît doucement dans le mix.",
+  },
+];
+
 const getScrollY = () => (typeof window !== "undefined" ? window.scrollY : 0);
 
 const randomSuffix = () => Math.random().toString(36).slice(2, 8);
@@ -62,11 +86,19 @@ const CustomizeSongStructure = ({ baseStructure = [], onChange }) => {
     buildSortableItems(sanitizedBase)
   );
   const [activeItemId, setActiveItemId] = useState(null);
+  const [insertPreviewIndex, setInsertPreviewIndex] = useState(null);
   const containerRef = useRef(null);
+  const sortableItemsRef = useRef(sortableItems);
   const dragStateRef = useRef({
     itemId: null,
+    paletteType: null,
+    pointerId: null,
     containerTop: 0,
+    containerRect: null,
+    targetIndex: null,
+    isOverContainer: false,
   });
+  const globalListenersRef = useRef({ move: null, up: null });
 
   const extractValues = useCallback(
     (items) =>
@@ -84,6 +116,10 @@ const CustomizeSongStructure = ({ baseStructure = [], onChange }) => {
     });
   }, [sanitizedBase, extractValues]);
 
+  useEffect(() => {
+    sortableItemsRef.current = sortableItems;
+  }, [sortableItems]);
+
   useEffect(() => {
     onChange?.(extractValues(sortableItems));
   }, [sortableItems, extractValues, onChange]);
@@ -103,11 +139,18 @@ const CustomizeSongStructure = ({ baseStructure = [], onChange }) => {
     });
   }, [sortableItems]);
 
-  const optionalSegments = useMemo(
+  const paletteSegments = useMemo(
     () =>
       OPTIONAL_STRUCTURE_SEGMENTS.map((type) => {
         const meta = getSegmentMeta(type);
-        return { type, label: meta?.label || formatStructureLabel(type, 1) };
+        const override = PALETTE_SEGMENT_OVERRIDES.find(
+          (segment) => segment.type === type
+        );
+        return {
+          type,
+          label: meta?.label || formatStructureLabel(type, 1),
+          description: override?.description || "",
+        };
       }),
     []
   );
@@ -131,8 +174,8 @@ const CustomizeSongStructure = ({ baseStructure = [], onChange }) => {
     [extractValues]
   );
 
-  const handleOptionalSegmentPress = useCallback(
-    (type) => {
+  const addOptionalSegment = useCallback(
+    (type, insertIndex = null) => {
       const meta = getSegmentMeta(type);
       setSortableItems((prev) => {
         const currentValues = extractValues(prev);
@@ -145,14 +188,16 @@ const CustomizeSongStructure = ({ baseStructure = [], onChange }) => {
           });
         }
 
-        const allowsMultiple = meta?.allowMultiple !== false;
-        if (!allowsMultiple && nextValues.includes(type)) {
-          const filtered = nextValues.filter((value) => value !== type);
-          const sanitized = sanitizeStructureList(filtered);
-          return buildSortableItems(sanitized);
+        if (meta?.allowMultiple === false) {
+          nextValues = nextValues.filter((value) => value !== type);
         }
 
-        nextValues.push(type);
+        const targetIndex =
+          typeof insertIndex === "number"
+            ? clamp(insertIndex, 0, nextValues.length)
+            : nextValues.length;
+
+        nextValues.splice(targetIndex, 0, type);
         const sanitized = sanitizeStructureList(nextValues);
         return buildSortableItems(sanitized);
       });
@@ -160,10 +205,200 @@ const CustomizeSongStructure = ({ baseStructure = [], onChange }) => {
     [extractValues]
   );
 
-  const handleGrant = useCallback((itemId, event) => {
+  const resetDragState = useCallback(() => {
+    dragStateRef.current = {
+      itemId: null,
+      paletteType: null,
+      pointerId: null,
+      containerTop: 0,
+      containerRect: null,
+      targetIndex: null,
+      isOverContainer: false,
+    };
+  }, []);
+
+  const cleanupPointerListeners = useCallback(() => {
+    if (typeof window !== "undefined") {
+      const { move, up } = globalListenersRef.current;
+      if (move) {
+        window.removeEventListener("pointermove", move);
+      }
+      if (up) {
+        window.removeEventListener("pointerup", up);
+        window.removeEventListener("pointercancel", up);
+      }
+      globalListenersRef.current = { move: null, up: null };
+    }
+    if (typeof document !== "undefined") {
+      document.body.style.userSelect = "";
+      document.body.style.cursor = "";
+    }
+    resetDragState();
+  }, [resetDragState]);
+
+  useEffect(() => {
+    return () => {
+      cleanupPointerListeners();
+    };
+  }, [cleanupPointerListeners]);
+
+  const handleGlobalPointerMove = useCallback(
+    (event) => {
+      const dragState = dragStateRef.current;
+      if (!dragState.itemId && !dragState.paletteType) return;
+      if (
+        dragState.pointerId != null &&
+        event?.pointerId != null &&
+        dragState.pointerId !== event.pointerId
+      ) {
+        return;
+      }
+
+      const scrollY = getScrollY();
+      const absoluteY =
+        typeof event.pageY === "number"
+          ? event.pageY
+          : typeof event.clientY === "number"
+            ? event.clientY + scrollY
+            : scrollY;
+      const pointerY = absoluteY - (dragState.containerTop || 0);
+
+      if (dragState.itemId) {
+        setSortableItems((prev) => {
+          const currentIndex = prev.findIndex(
+            (it) => it.id === dragState.itemId
+          );
+          if (currentIndex === -1) return prev;
+          const maxIndex = Math.max(prev.length - 1, 0);
+          const targetIndex = clamp(
+            Math.floor(pointerY / ROW_HEIGHT),
+            0,
+            maxIndex
+          );
+          if (targetIndex === currentIndex) return prev;
+          return reorder(prev, currentIndex, targetIndex);
+        });
+        return;
+      }
+
+      const rect = dragState.containerRect;
+      const listLength = sortableItemsRef.current.length;
+      const isOver =
+        rect == null
+          ? true
+          : event.clientX >= rect.left &&
+            event.clientX <= rect.right &&
+            event.clientY >= rect.top &&
+            event.clientY <= rect.bottom;
+      dragStateRef.current.isOverContainer = isOver;
+
+      if (!isOver) {
+        if (insertPreviewIndex !== null) {
+          setInsertPreviewIndex(null);
+        }
+        dragStateRef.current.targetIndex = null;
+        return;
+      }
+
+      const containerHeight = rect?.height ?? listLength * ROW_HEIGHT;
+      let targetIndex = Math.floor(pointerY / ROW_HEIGHT);
+      if (pointerY < 0) targetIndex = 0;
+      if (pointerY > containerHeight) targetIndex = listLength;
+      targetIndex = clamp(targetIndex, 0, listLength);
+
+      if (dragStateRef.current.targetIndex !== targetIndex) {
+        dragStateRef.current.targetIndex = targetIndex;
+        setInsertPreviewIndex(targetIndex);
+      }
+    },
+    [insertPreviewIndex, setSortableItems]
+  );
+
+  const handleGlobalPointerUp = useCallback(
+    (event) => {
+      const dragState = dragStateRef.current;
+      if (!dragState.itemId && !dragState.paletteType) return;
+      if (
+        dragState.pointerId != null &&
+        event?.pointerId != null &&
+        dragState.pointerId !== event.pointerId
+      ) {
+        return;
+      }
+
+      if (dragState.itemId) {
+        setSortableItems((prev) =>
+          buildSortableItems(extractValues(prev))
+        );
+      } else if (dragState.paletteType) {
+        let isOver = dragState.isOverContainer;
+        let targetIndex = dragState.targetIndex;
+        const rect = dragState.containerRect;
+
+        if (rect && (!isOver || typeof targetIndex !== "number")) {
+          const scrollY = getScrollY();
+          const absoluteY =
+            typeof event.pageY === "number"
+              ? event.pageY
+              : typeof event.clientY === "number"
+                ? event.clientY + scrollY
+                : scrollY;
+          const pointerY = absoluteY - (dragState.containerTop || 0);
+          const within =
+            event.clientX >= rect.left &&
+            event.clientX <= rect.right &&
+            event.clientY >= rect.top &&
+            event.clientY <= rect.bottom;
+
+          if (within) {
+            isOver = true;
+            const listLength = sortableItemsRef.current.length;
+            const containerHeight = rect?.height ?? listLength * ROW_HEIGHT;
+            let computedIndex = Math.floor(pointerY / ROW_HEIGHT);
+            if (pointerY < 0) computedIndex = 0;
+            if (pointerY > containerHeight) computedIndex = listLength;
+            targetIndex = clamp(computedIndex, 0, listLength);
+          }
+        }
+
+        if (isOver && typeof targetIndex === "number") {
+          addOptionalSegment(dragState.paletteType, targetIndex);
+        }
+      }
+
+      setActiveItemId(null);
+      setInsertPreviewIndex(null);
+      cleanupPointerListeners();
+    },
+    [addOptionalSegment, cleanupPointerListeners, extractValues]
+  );
+
+  const attachGlobalListeners = useCallback(() => {
+    if (typeof window === "undefined") return;
+    if (globalListenersRef.current.move) return;
+
+    const moveListener = (event) => handleGlobalPointerMove(event);
+    const upListener = (event) => handleGlobalPointerUp(event);
+
+    window.addEventListener("pointermove", moveListener);
+    window.addEventListener("pointerup", upListener);
+    window.addEventListener("pointercancel", upListener);
+
+    globalListenersRef.current = {
+      move: moveListener,
+      up: upListener,
+    };
+  }, [handleGlobalPointerMove, handleGlobalPointerUp]);
+
+  const startItemDrag = useCallback(
+    (itemId, event) => {
+      const nativeEvent = event?.nativeEvent || {};
+      if (typeof nativeEvent.button === "number" && nativeEvent.button !== 0)
+        return;
+      event?.preventDefault?.();
+
       const rect = containerRef.current?.getBoundingClientRect();
       const scrollY = getScrollY();
-    const nativeEvent = event.nativeEvent || {};
       const fallbackY =
         typeof nativeEvent.pageY === "number"
           ? nativeEvent.pageY
@@ -171,58 +406,101 @@ const CustomizeSongStructure = ({ baseStructure = [], onChange }) => {
             ? nativeEvent.clientY + scrollY
             : scrollY;
       const containerTop = rect ? rect.top + scrollY : fallbackY;
+
       dragStateRef.current = {
         itemId,
+        paletteType: null,
+        pointerId:
+          typeof nativeEvent.pointerId === "number"
+            ? nativeEvent.pointerId
+            : null,
         containerTop,
+        containerRect: rect
+          ? {
+              top: rect.top,
+              bottom: rect.bottom,
+              left: rect.left,
+              right: rect.right,
+              height: rect.height,
+            }
+          : null,
+        targetIndex: null,
+        isOverContainer: true,
       };
+
       setActiveItemId(itemId);
+      setInsertPreviewIndex(null);
+
       if (typeof document !== "undefined") {
         document.body.style.userSelect = "none";
+        document.body.style.cursor = "grabbing";
       }
-  }, []);
 
-  const handleMove = useCallback((event) => {
-    const { itemId, containerTop } = dragStateRef.current;
-    if (!itemId) return;
-    const nativeEvent = event.nativeEvent || {};
+      attachGlobalListeners();
+    },
+    [attachGlobalListeners]
+  );
+
+  const startPaletteDrag = useCallback(
+    (type, event) => {
+      const nativeEvent = event?.nativeEvent || {};
+      if (typeof nativeEvent.button === "number" && nativeEvent.button !== 0)
+        return;
+      event?.preventDefault?.();
+
+      const rect = containerRef.current?.getBoundingClientRect();
       const scrollY = getScrollY();
-    const absoluteY =
+      const fallbackY =
         typeof nativeEvent.pageY === "number"
           ? nativeEvent.pageY
           : typeof nativeEvent.clientY === "number"
             ? nativeEvent.clientY + scrollY
             : scrollY;
-    const pointerY = absoluteY - containerTop;
+      const containerTop = rect ? rect.top + scrollY : fallbackY;
 
-    setSortableItems((prev) => {
-      const currentIndex = prev.findIndex((it) => it.id === itemId);
-      if (currentIndex === -1) return prev;
-      const targetIndex = clamp(
-        Math.floor(pointerY / ROW_HEIGHT),
-        0,
-        Math.max(prev.length - 1, 0)
-      );
-      if (targetIndex === currentIndex) return prev;
-      return reorder(prev, currentIndex, targetIndex);
-    });
-  }, []);
-
-  const handleRelease = useCallback(() => {
-    setSortableItems((prev) => buildSortableItems(extractValues(prev)));
       dragStateRef.current = {
         itemId: null,
-      containerTop: 0,
-    };
-    setActiveItemId(null);
-    if (typeof document !== "undefined") {
-      document.body.style.userSelect = "";
+        paletteType: type,
+        pointerId:
+          typeof nativeEvent.pointerId === "number"
+            ? nativeEvent.pointerId
+            : null,
+        containerTop,
+        containerRect: rect
+          ? {
+              top: rect.top,
+              bottom: rect.bottom,
+              left: rect.left,
+              right: rect.right,
+              height: rect.height,
             }
-  }, [extractValues]);
+          : null,
+        targetIndex: null,
+        isOverContainer: false,
+      };
+
+      setActiveItemId(`palette-${type}`);
+      setInsertPreviewIndex(null);
+
+      if (typeof document !== "undefined") {
+        document.body.style.userSelect = "none";
+        document.body.style.cursor = "grabbing";
+      }
+
+      attachGlobalListeners();
+    },
+    [attachGlobalListeners]
+  );
 
   const StructureRow = ({ item }) => {
     const baseType = item?.type || item?.value;
     const meta = getSegmentMeta(baseType);
     const canRemove = meta?.optional === true;
+    const isIntroduction =
+      baseType === "short_intro" ||
+      baseType === "long_intro" ||
+      baseType === "intro" ||
+      baseType === "introduction";
     const containerStyle = StyleSheet.flatten([
       styles.rowContainer,
       activeItemId === item.id ? styles.activeItem : null,
@@ -252,16 +530,14 @@ const CustomizeSongStructure = ({ baseStructure = [], onChange }) => {
                 <Image source={icons.close} style={styles.removeIcon} />
               </TouchableOpacity>
             )}
+            {!isIntroduction && (
               <View
                 style={styles.handleWrapper}
-              onStartShouldSetResponder={() => true}
-              onResponderGrant={(event) => handleGrant(item.id, event)}
-              onResponderMove={handleMove}
-              onResponderRelease={handleRelease}
-              onResponderTerminate={handleRelease}
+                onPointerDown={(event) => startItemDrag(item.id, event)}
               >
                 <Image source={icons.dragDots} style={styles.handleIcon} />
               </View>
+            )}
           </View>
         </View>
       </CreateLyricsHeader>
@@ -269,16 +545,17 @@ const CustomizeSongStructure = ({ baseStructure = [], onChange }) => {
   };
 
   return (
-    <View style={{ flex: 1, gap: 10, marginTop: 16 }}>
+    <View style={styles.container}>
       <CreateLyricsHeader
         title="Personnalise la structure de ta chanson"
         subTitle="Réorganise par glisser-déposer"
       />
-      <View style={{ flex: 1 }}>
       <ScrollView
         contentContainerStyle={styles.scrollContent}
         showsVerticalScrollIndicator={false}
       >
+        <View style={styles.columns}>
+          <View style={styles.column}>
             <View style={styles.sectionTag}>
               <Text style={styles.sectionTagText}>Structure actuelle</Text>
             </View>
@@ -288,11 +565,22 @@ const CustomizeSongStructure = ({ baseStructure = [], onChange }) => {
               style={styles.blurSection}
             >
               <View style={styles.listContainer} ref={containerRef}>
-              {labeledItems.map((item) => (
-                <StructureRow key={item.id} item={item} />
+                {labeledItems.map((item, index) => (
+                  <React.Fragment key={item.id}>
+                    {insertPreviewIndex === index && (
+                      <View style={styles.dropPreview} />
+                    )}
+                    <StructureRow item={item} />
+                  </React.Fragment>
                 ))}
+                {insertPreviewIndex != null &&
+                  insertPreviewIndex >= labeledItems.length && (
+                    <View style={styles.dropPreview} />
+                  )}
               </View>
             </ItemContainer>
+          </View>
+          <View style={[styles.column, styles.paletteColumn]}>
             <View style={[styles.sectionTag, styles.addSectionTag]}>
               <Text style={styles.sectionTagText}>Éléments à ajouter</Text>
             </View>
@@ -301,52 +589,109 @@ const CustomizeSongStructure = ({ baseStructure = [], onChange }) => {
               disableKeyboardHeight
               style={styles.blurSection}
             >
-            <View style={styles.optionsContainer}>
-              {optionalSegments.map((segment) => {
+              <View style={styles.paletteList}>
+                {paletteSegments.map((segment) => {
                   const count = segmentCounts[segment.type] || 0;
-                const selected = count > 0;
+                  const isActive = activeItemId === `palette-${segment.type}`;
                   const blurStyle = StyleSheet.flatten([
                     styles.itemBlur,
-                  selected ? styles.selectedBlur : null,
+                    styles.paletteItemBlur,
+                    isActive ? styles.activeBlur : null,
                   ]);
                   const badgeStyle = StyleSheet.flatten([
                     styles.countBadge,
-                  selected ? styles.countBadgeActive : null,
+                    count > 0 ? styles.countBadgeActive : null,
                   ]);
 
                   return (
-                  <CreateLyricsHeader
+                    <View
                       key={segment.type}
+                      style={styles.paletteCardWrapper}
+                      onPointerDown={(event) =>
+                        startPaletteDrag(segment.type, event)
+                      }
+                    >
+                      <CreateLyricsHeader
                         tint="dark"
                         intensity={40}
                         showBorder={false}
-                    onPress={() => handleOptionalSegmentPress(segment.type)}
                         containerStyle={styles.rowContainer}
                         blurViewStyle={blurStyle}
                       >
-                    <View style={styles.row}>
+                        <View style={styles.paletteRow}>
+                          <View style={styles.paletteTextWrapper}>
                             <Text style={styles.rowText}>{segment.label}</Text>
+                            {segment.description ? (
+                              <Text style={styles.paletteDescription}>
+                                {segment.description}
+                              </Text>
+                            ) : null}
+                          </View>
+                          <View style={styles.paletteActions}>
+                            <Pressable
+                              onPointerDown={(ev) => ev?.stopPropagation?.()}
+                              onPressIn={(ev) => ev?.stopPropagation?.()}
+                              onPress={(ev) => {
+                                ev?.stopPropagation?.();
+                                addOptionalSegment(segment.type);
+                                setInsertPreviewIndex(null);
+                                setActiveItemId(null);
+                              }}
+                              hitSlop={{ top: 8, right: 8, bottom: 8, left: 8 }}
+                              style={({ pressed }) =>
+                                StyleSheet.flatten([
+                                  styles.addButton,
+                                  pressed ? styles.addButtonPressed : null,
+                                ])
+                              }
+                            >
+                              <Image source={icons.add} style={styles.addIcon} />
+                            </Pressable>
                             <View style={badgeStyle}>
                               <Text style={styles.countBadgeText}>{count}</Text>
                             </View>
                           </View>
+                        </View>
                       </CreateLyricsHeader>
+                    </View>
                   );
                 })}
               </View>
             </ItemContainer>
-        </ScrollView>
           </View>
         </View>
+      </ScrollView>
+    </View>
   );
 };
 
 export default CustomizeSongStructure;
 
 const styles = StyleSheet.create({
+  container: {
+    flex: 1,
+    gap: 10,
+    marginTop: 16,
+  },
   scrollContent: {
     paddingBottom: 24,
-    gap: 12,
+    gap: 24,
+  },
+  columns: {
+    flexDirection: "row",
+    flexWrap: "wrap",
+    gap: 24,
+    alignItems: "flex-start",
+  },
+  column: {
+    flexGrow: 1,
+    flexBasis: 0,
+    minWidth: 320,
+    gap: 16,
+  },
+  paletteColumn: {
+    flexBasis: 360,
+    maxWidth: 420,
   },
   sectionTag: {
     alignSelf: "flex-start",
@@ -354,10 +699,9 @@ const styles = StyleSheet.create({
     paddingVertical: 6,
     borderRadius: 999,
     backgroundColor: "rgba(255,255,255,0.12)",
-    marginTop: 12,
   },
   addSectionTag: {
-    marginTop: 24,
+    marginTop: 0,
   },
   sectionTagText: {
     fontSize: 12,
@@ -366,12 +710,19 @@ const styles = StyleSheet.create({
     letterSpacing: 1,
     textTransform: "uppercase",
   },
+  blurSection: {
+    width: "100%",
+  },
   listContainer: {
     gap: 12,
   },
-  blurSection: {
-    marginTop: 12,
-    width: "100%",
+  dropPreview: {
+    height: ROW_HEIGHT,
+    borderRadius: 14,
+    borderWidth: 1,
+    borderStyle: "dashed",
+    borderColor: Palette.transparentWhite,
+    backgroundColor: "rgba(255,255,255,0.08)",
   },
   rowContainer: {
     borderRadius: 14,
@@ -387,10 +738,13 @@ const styles = StyleSheet.create({
     alignItems: "center",
     justifyContent: "space-between",
   },
-  activeBlur: {
-    backgroundColor: Palette.transparentWhite,
+  paletteItemBlur: {
+    alignItems: "stretch",
+    justifyContent: "flex-start",
+    flexDirection: "column",
+    paddingVertical: 16,
   },
-  selectedBlur: {
+  activeBlur: {
     backgroundColor: Palette.transparentWhite,
   },
   row: {
@@ -429,9 +783,46 @@ const styles = StyleSheet.create({
     tintColor: Palette.white,
     cursor: "grab",
   },
-  optionsContainer: {
+  paletteList: {
     gap: 12,
   },
+  paletteCardWrapper: {
+    cursor: "grab",
+  },
+  paletteRow: {
+    flexDirection: "row",
+    alignItems: "flex-start",
+    justifyContent: "space-between",
+    gap: 16,
+  },
+  paletteTextWrapper: {
+    flex: 1,
+    gap: 6,
+  },
+  paletteDescription: {
+    fontSize: 14,
+    lineHeight: 20,
+    color: "rgba(255,255,255,0.75)",
+    fontFamily: FONT_FAMILY.InterRegular,
+  },
+  paletteActions: {
+    flexDirection: "row",
+    alignItems: "center",
+    gap: 8,
+  },
+  addButton: {
+    padding: 8,
+    borderRadius: 999,
+    backgroundColor: "rgba(255,255,255,0.08)",
+  },
+  addButtonPressed: {
+    backgroundColor: "rgba(255,255,255,0.18)",
+  },
+  addIcon: {
+    width: 18,
+    height: 18,
+    tintColor: Palette.white,
+  },
   countBadge: {
     minWidth: 28,
     paddingHorizontal: 8,