/**
 * 选中节点的样式浮层。把颜色、文字排版、背景与旋转/拉伸模式转换成作用域编辑动作，不在此保存样式副本。
 */
"use client";

import { AnimatePresence, motion, useReducedMotion } from "motion/react";
import { NodeToolbar, Position, type NodeProps } from "@xyflow/react";
import { AlignCenter, AlignLeft, AlignRight, Bold, Italic, RotateCw, Underline } from "lucide-react";
import type { CanvasNode } from "@/lib/canvas";
import type { TextStyle } from "@/lib/canvas-elements";
import { ResizeToggle } from "./transformable-node";
import {useCanvasOverlay} from "./canvas-overlays";
import {useScopedNodeEditing} from "./node-editing";
import {canvasKeyContext} from "@/lib/canvas-bindings/input-router";
import styles from "./canvas.module.css";

/** NodeToolbar负责定位，AnimatePresence负责选中/取消选中时的进出动画，减少动态效果时关闭位移与时长。
 * 浮层注册到overlay索引，保证Portal中的输入也能归属于正确视图与元素。 */
export function NodeStyleToolbar({ id, data, selected }: NodeProps<CanvasNode>) {
  const overlay=useCanvasOverlay(id,"node-style");
  const reduce = useReducedMotion();
  const editing = useScopedNodeEditing(id,data.__headlessTarget);
  const style = data.textStyle || {};
  // 只有text/script/plain-text展示文字排版；图片不展示前景/背景色，图标可调颜色但不展示拉伸开关。
  const text = data.kind === "text" || data.kind === "script" || data.kind === "plain-text";
  /** 统一样式动作入口；字号作为独立可选参数，避免把它混进textStyle的字段空间。 */
  const patch = (value: TextStyle, fontSize?: number) => editing.style(id, value, fontSize);
  // 颜色输入用现有值或默认色；字号仅提交8—160范围，透明背景在取色器中显示白色但不自动写回模型。
  // 加粗/斜体/下划线按当前值取反，对齐和行高直接提交所选值；清除背景明确写transparent。
  // 常规事件停止冒泡；Escape只在非组合输入、非文本编辑且未被处理时关闭当前节点的变换模式。
  return <AnimatePresence>{selected && <NodeToolbar style={{ zIndex: 100, pointerEvents: "auto" }} isVisible={true} position={Position.Top} offset={34}>
    <motion.div ref={overlay} initial={{ opacity: 0, y: reduce ? 0 : 5 }} animate={{ opacity: 1, y: 0 }} exit={{ opacity: 0, y: reduce ? 0 : 5 }} transition={{ duration: reduce ? 0 : 0.14 }} className={`${styles.styleToolbar} nodrag nopan nowheel`} data-node-style={id} role="toolbar" aria-label="元素样式"
      onPointerDown={(event) => event.stopPropagation()} onClick={(event) => event.stopPropagation()} onDoubleClick={(event) => event.stopPropagation()}
      onKeyDown={(event) => {
        // 其它按键留给当前控件并阻断全局快捷键；Escape让输入上下文先决定是否可用于退出模式。
        if(event.key!=="Escape"){event.stopPropagation();return;}
        if(event.defaultPrevented||event.nativeEvent.isComposing||canvasKeyContext(event.nativeEvent).textEditing)return;
        // The registered overlay owns its mode dismissal; global shortcuts stay out.
        editing.rotate(null);editing.resize(null);event.preventDefault();event.stopPropagation();
      }}>
      {!(["image", "plain-image"].includes(data.kind)) && <label title="文字或图标颜色" className={styles.colorPicker}><span style={{ background: style.color || "#37352f" }} /><input aria-label="文字或图标颜色" type="color" value={style.color || "#37352f"} onChange={(event) => patch({ color: event.target.value })} /></label>}
      {text && <>
        <select aria-label="字体" value={style.fontFamily || "sans"} onChange={(event) => patch({ fontFamily: event.target.value as TextStyle["fontFamily"] })}><option value="sans">正文</option><option value="serif">衬线</option><option value="mono">等宽</option></select>
        <input aria-label="字号" title="字号" type="number" min={8} max={160} value={data.fontSize || (data.kind === "plain-text" ? 24 : 13)} onChange={(event) => { const size = Number(event.target.value); if (size >= 8 && size <= 160) patch({}, size); }} />
        {([["bold", Bold, "加粗"], ["italic", Italic, "斜体"], ["underline", Underline, "下划线"]] as const).map(([key, Icon, label]) => <button key={key} aria-label={label} aria-pressed={!!style[key]} title={label} onClick={() => patch({ [key]: !style[key] })}><Icon size={16} /></button>)}
        {([["left", AlignLeft, "左对齐"], ["center", AlignCenter, "居中"], ["right", AlignRight, "右对齐"]] as const).map(([align, Icon, label]) => <button key={align} aria-label={label} aria-pressed={(style.align || "left") === align} title={label} onClick={() => patch({ align })}><Icon size={16} /></button>)}
        <select aria-label="行距" title="行距" value={style.lineHeight || 1.5} onChange={(event) => patch({ lineHeight: Number(event.target.value) })}><option value={1}>1</option><option value={1.25}>1.25</option><option value={1.5}>1.5</option><option value={1.8}>1.8</option><option value={2}>2</option></select>
      </>}
      {!(["image", "plain-image"].includes(data.kind)) && <label className={styles.colorPicker} title="背景色"><span style={{ background: style.background && style.background !== "transparent" ? style.background : "#ffffff" }} /><input aria-label="背景色" type="color" value={style.background && style.background !== "transparent" ? style.background : "#ffffff"} onChange={(event) => patch({ background: event.target.value })} /></label>}
      {!(["image", "plain-image"].includes(data.kind)) && <button title="清除背景" aria-label="清除背景" onClick={() => patch({ background: "transparent" })}>∅</button>}
      {data.kind !== "icon" && <ResizeToggle id={id} renderedTarget={data.__headlessTarget} />}
      <button data-rotate-toggle={id} title="旋转模式" aria-label="旋转模式" aria-pressed={editing.rotating === id} onClick={() => editing.rotate(editing.rotating === id ? null : id)}><RotateCw size={16} /></button>
    </motion.div>
  </NodeToolbar>}</AnimatePresence>;
}