import Teleport from '@/components/Teleport'

import * as TextboxConfig from './module/TextboxConfig'
import fabric from "../../js/fabric-adapter";
import {markRaw,reactive} from "vue";
// 将默认的 clipSettings 提取为常量
const DEFAULT_CLIP_SETTINGS = {
  shape: '',
  width: 100,
  height: 100,
  radius: 50,
  offsetX: 50,
  offsetY: 50,
  showClipStroke: true,
  strokeColor: '#000000',
  strokeWidth: 1,
  rectRadius: 0,
  svgUrl: '',
  svgWidth: 100,
  svgHeight: 100,
  fillColor: '#FFFFFF', // 背景色
  fillOpacity: 0.5, // 背景透明度
};

export default  {
  components: {
    Teleport,
  },
  data() {
    return {
      TextboxConfig:TextboxConfig,
      options:TextboxConfig.fontFamily,
      fontFamilyStyle:"",
      opacityValue: 1,
      clipPreview: {
        dataUrl: '',
        maxOffsetX: 0,
        maxOffsetY: 0,
        maxWidth: 0,
        maxHeight: 0,
        maxRadius: 0,
      },
      layerState: {
        fontSize: 16,
        lineHeight: 1.2,
        charSpacing: 0,
        fill: '#000000',
        textAlign: 'left',
      },
      shadowText:{
        x:0,
        y:0,
        vague:0,
        color:'#000',
      },

      clipSettings: {
        ...DEFAULT_CLIP_SETTINGS,
      },
      strokeObj: null, // 用于引用当前描边图形
      imageSize: {
        width: 100,
        height: 100,
        keepRatio: true,
        originalRatio: 1, // 原始宽高比
        lastAdjusted: 'width' // 最后调整的维度 ('width' 或 'height')
      },
      // 响应式的文字内容状态（用于解决markRaw后的响应式问题）
      reactiveTextContent: ''
    }
  },
  props: {
  },
  computed: {
    editLayer(){
      let object = {}
      if(this.selected && this.selected.length === 1){
        object = this.selected[0]
      }
      // return reactive(object)
      return object
    },
    fontFamily(){
      let obj = {}
      this.TextboxConfig.fontFamily.map(item=>{
        obj[item.name] = item
      })
      return obj
    },
    shadow(){
      let  shadowText = this.shadowText
      return `${shadowText.x}px ${shadowText.y}px ${shadowText.vague}px  ${shadowText.color} `
    }
  },
  watch: {
    editLayer(){
      // 自动加载文字对象的字体
      if (this.editLayer && (this.editLayer.type === 'textbox' || this.editLayer.type === 'text')) {
        const fontFamily = this.editLayer.fontFamily
        if (fontFamily && fontFamily !== 'Arial') {
          // 如果是自定义字体，自动加载
          this.setFontFamily(fontFamily, this.editLayer).catch(err => {
            console.warn('自动加载字体失败:', err)
          })
        }
      }

      this.fontFamilyStyle = this.editLayer.fontFamily



      this.opacityValue = (this.editLayer && typeof this.editLayer.opacity === 'number')
        ? this.editLayer.opacity
        : 1
      this.layerState = {
        ...this.layerState,
        text: this.editLayer?.text ?? '',
        fontSize: this.editLayer?.fontSize ?? 16,
        lineHeight: this.editLayer?.lineHeight ?? 1,
        charSpacing: this.editLayer?.charSpacing ?? 0,
        fill: this.editLayer?.fill ?? '#000000',
        textAlign: this.editLayer?.textAlign ?? 'left',
      }

      // 同步响应式文字内容状态
      this.reactiveTextContent = this.editLayer?.text ?? '';
      switch (this.editLayer.type){
        case "textbox":
          if(this.editLayer.shadow){
            this.shadowText = {
              x:this.editLayer.shadow.offsetX || 0,
              y:this.editLayer.shadow.offsetY || 0,
              vague:this.editLayer.shadow.blur || 0,
              color:this.editLayer.shadow.color || '#000',
            }
          }else{
            this.shadowText = {
              x:0,
              y:0,
              vague:0,
              color:'#000'
            }
          }
          break;
        case "image":
          // 计算原始宽高比（基于图片的原始尺寸）
          const originalWidth = this.editLayer.width || 100;
          const originalHeight = this.editLayer.height || 100;
          const originalRatio = originalWidth / originalHeight;

          // 更新图片尺寸显示
          this.imageSize = {
            width: Math.round(this.editLayer.getScaledWidth() || originalWidth),
            height: Math.round(this.editLayer.getScaledHeight() || originalHeight),
            keepRatio: true,
            originalRatio: originalRatio,
            lastAdjusted: 'width'
          };

          // 优先使用默认值
          let imageSettings = { ...DEFAULT_CLIP_SETTINGS };

          // 如果图片对象有保存的裁剪设置，优先使用
          if (this.editLayer.clipSettings) {
            imageSettings = { ...imageSettings, ...this.editLayer.clipSettings };
          }
          // 否则从 clipPath 恢复基本几何属性
          else if (this.editLayer.clipPath) {
            imageSettings = {
              ...imageSettings,
              width: this.editLayer.clipPath.width || imageSettings.width,
              height: this.editLayer.clipPath.height || imageSettings.height,
              offsetX: this.editLayer.clipPath.left || imageSettings.offsetX,
              offsetY: this.editLayer.clipPath.top || imageSettings.offsetY,
              shape: this.editLayer.clipPath.type || imageSettings.shape,
            };
          }

          // 如果没有剪裁路径，则 shape 为 ""
          if (!this.editLayer.clipPath) {
            imageSettings.shape = '';
          }

          // 更新 clipSettings，用于 UI 显示
          this.clipSettings = imageSettings;

          // 如果有裁剪设置，恢复背景对象
          if (imageSettings.shape && this.editLayer.clipSettings) {
            this.createClipBackground();
          }

          // 为图片对象添加尺寸变化监听
          if (this.editLayer.type === 'image') {
            // 移除之前可能的监听器
            this.editLayer.off('scaling', this.updateImageSizeFromCanvas);
            // 添加新的监听器
            this.editLayer.on('scaling', this.updateImageSizeFromCanvas);
          }

          // 同步描边图形（如果存在）
          if (this.editLayer.strokeObj) {
            this.fcanvas.add(markRaw(this.editLayer.strokeObj));
          }
          this.updateClipPreview && this.updateClipPreview()
          break;
      }
    },
    selected(){
      this.opacityValue = (this.editLayer && typeof this.editLayer.opacity === 'number')
        ? this.editLayer.opacity
        : 1
      this.layerState = {
        ...this.layerState,
        text: this.editLayer?.text ?? '',
        fontSize: this.editLayer?.fontSize ?? 16,
        lineHeight: this.editLayer?.lineHeight ?? 1,
        charSpacing: this.editLayer?.charSpacing ?? 0,
        fill: this.editLayer?.fill ?? '#000000',
        textAlign: this.editLayer?.textAlign ?? 'left',
      }

      // 同步响应式文字内容状态
      this.reactiveTextContent = this.editLayer?.text ?? '';

      // 更新图片尺寸显示
      if (this.editLayer && this.editLayer.type === 'image') {
        const originalWidth = this.editLayer.width || 100;
        const originalHeight = this.editLayer.height || 100;
        const originalRatio = originalWidth / originalHeight;

        this.imageSize = {
          width: Math.round(this.editLayer.getScaledWidth() || originalWidth),
          height: Math.round(this.editLayer.getScaledHeight() || originalHeight),
          keepRatio: this.imageSize.keepRatio, // 保持当前的保持比例设置
          originalRatio: originalRatio,
          lastAdjusted: this.imageSize.lastAdjusted || 'width'
        };
      }
    }
  },
  created() {
  },
  mounted() {
  },
  methods:{
    judge(){
        return this.editLayer?.id
    },
    //翻转
    Flip(type){
      if(!this.judge()) return;
      switch (type){
        case 'X':
          this.editLayer.set({
            flipX:!this.editLayer.flipX,
          })
          break;
        case 'Y':
          this.editLayer.set({
            flipY:!this.editLayer.flipY,
          })
          break;
      }
      this.updateCanvasState()
      this.fcanvas.requestRenderAll()

    },
    //合并组
    setGroup(){
      const group = this.fcanvas.getActiveObject().toGroup();
      this.fcanvas.requestRenderAll();
      this.selected = [group]
      if(this.getLayers) this.getLayers()
      this.updateCanvasState()
    },
    //取消组
    unGroup(){
      if (!this.fcanvas.getActiveObject()) {
        return;
      }
      if (this.fcanvas.getActiveObject().type !== 'group') {
        return;
      }
      this.fcanvas.getActiveObject().toActiveSelection();
      this.selected = this.fcanvas.getActiveObject()._objects
      this.fcanvas.requestRenderAll();
      if(this.getLayers) this.getLayers()
      this.updateCanvasState()
    },
    //编辑文字
    editObj(data = {
      label:'',
      value:'',
      action:'set',
    }){
      if(!this.judge()) return;
      let {label,value,action } = data
      action = action || 'set'
      // 构造待设置的参数；仅当 label 为 fill 且当前无填充时兜底 #000
      let params = value
      if (label) {
        params = { [label]: value }
        if (label === 'fill' && !this.editLayer.fill) {
          params.fill = value || '#000'
        }
      }

      this.editLayer[action](params)
      if (Array.isArray(this.editLayer._objects)){
        this.editLayer._objects?.forEach(item=>{
          item[action](params)
        })
      }

      // 同步常用文本状态到 layerState，避免 UI 视图不同步
      if (['fontSize','lineHeight','charSpacing','fill','textAlign'].includes(label)) {
        this.layerState = {
          ...this.layerState,
          [label]: value,
        }
      }

      this.updateCanvasState()
      this.fcanvas.requestRenderAll()
    },
    // 通用设置图层属性，解决 markRaw 不响应问题
    setLayerAttr(name, val){
      if(!this.editLayer) return
      this.layerState = {
        ...this.layerState,
        [name]: val,
      }
      this.editLayer.set(name, val)
      if(Array.isArray(this.editLayer._objects)){
        this.editLayer._objects.forEach(o => o.set(name, val))
      }
      this.updateCanvasState()
      this.fcanvas && this.fcanvas.requestRenderAll()
    },
    // 设置透明度（解决 Vue3 markRaw 不响应）
    setOpacity(val){
      if(!this.editLayer) return
      const num = Number(val)
      this.opacityValue = num
      this.editLayer.set('opacity', num)
      if(Array.isArray(this.editLayer._objects)){
        this.editLayer._objects.forEach(o => o.set('opacity', num))
      }
      this.updateCanvasState()
      this.fcanvas && this.fcanvas.requestRenderAll()
    },
    async setFontFamily(val,item=null){
      console.log(val)
      console.log(item)
      console.log(this.fontFamily)
      if(!item && !this.judge()) return;
      let font = this.fontFamily[val]
      console.log(font)
      if(!font) return;

      await loadFont(font.name,font.src)
      let obj = item || this.editLayer
      if(typeof obj.set !== 'function') return;
      obj.set({'fontFamily': val});
      obj.setSelectionStyles({'fontFamily': val});
      this.fontFamilyStyle = val
      this.updateCanvasState()
      await this.$nextTick()
      this.fcanvas.requestRenderAll()

      async function loadFont(_fontName, _fontUrl) {

        return  new Promise((resolve, reject) => {

          if (checkFont(_fontName)) {
            console.log('已有字体：', _fontName)
            return resolve(true)
          }

          let prefont = new FontFace(
            _fontName,
            'url(' + _fontUrl + ')'
          );

          prefont.load().then(function (loaded_face) {

            document.fonts.add(loaded_face);
            // document.body.style.fontFamily = (_fontFamily ? _fontFamily + ',' : _fontFamily) + _fontName;

            console.log('字体加载成功', loaded_face, document.fonts)
            return resolve(true)

          }).catch(function (error) {
            console.log('字体加载失败', error)
            return reject(error)
          })

        })
      }
      function checkFont(name){
        let values = document.fonts.values();
        let isHave=false;
        let item = values.next();
        while(!item.done&&!isHave)
        {
          let fontFace=item.value;
          if(fontFace.family==name)
          {
            isHave=true;
          }
          item=values.next();
        }
        return isHave;
      }
    },
    remoteMethod(query){
      if (query !== '') {
          this.options = this.TextboxConfig.fontFamily.filter(item => {
            return item.localFile.toLowerCase()
              .indexOf(query.toLowerCase()) > -1;
          });
      } else {
        this.options = this.TextboxConfig.fontFamily
      }
    },
    async applyClipPath() {
      if (!this.judge()) return;


      const { shape, width, height, radius, offsetX, offsetY, rectRadius } = this.clipSettings;


      if (shape === '') {
        // 选择“无”时，直接清除剪裁
        this.clearClipPath();
        return;
      }
      try {
        // 创建纯剪裁区域（不带描边）
        let clipObj;

        if (shape === 'svg') {
            // 使用 fabric.js 加载远程 SVG
          clipObj = await new Promise((resolve, reject) => {
              fabric.loadSVGFromURL(
                  this.clipSettings.svgUrl,
                  (loadedObjects, options) => {
                    console.log('=============');
                    // 创建组合对象
                    const svgGroup = fabric.util.groupSVGElements(loadedObjects, options);
                    console.log(svgGroup);
                    // 设置尺寸
                    svgGroup.scaleToWidth(this.clipSettings.svgWidth);
                    console.log(this.clipSettings.svgWidth);
                    // svgGroup.scaleToHeight(this.clipSettings.svgHeight);

                    svgGroup.set({

                      absolutePositioned: true,
                      left: offsetX,
                      top: offsetY,
                    })
                    resolve(svgGroup);
                  }
              )
            });
          }else if (shape === 'rect') {
          if (width <= 0 || height <= 0) throw new Error('尺寸必须大于0');

          clipObj = new fabric.Rect({
            width: width,
            height: height,
            left: offsetX,
            top: offsetY,
            rx: rectRadius,
            ry: rectRadius,
            absolutePositioned: true
          });
        } else if(shape === 'circle') {
          if (radius <= 0) throw new Error('半径必须大于0');

          clipObj = new fabric.Circle({
            radius: radius,
            left: offsetX,
            top: offsetY,
            absolutePositioned: true
          });
        }

        // 应用剪裁区域
        this.editLayer.set({ clipPath: clipObj });

        // 保存裁剪设置到图片对象
        this.editLayer.clipSettings = { ...this.clipSettings };

        // 创建背景对象（方案二：独立背景对象）
        this.createClipBackground();

        // 更新画布
        this.updateClipStroke()
        this.updateCanvasState();
        this.fcanvas.requestRenderAll();
        this.updateClipPreview && this.updateClipPreview(true)
      } catch (error) {
        console.error('剪裁区域创建失败:', error);
        this.$message.error('剪裁设置错误: ' + error.message);
      }
    },

    // 创建裁剪背景对象（方案二：独立背景对象）
    createClipBackground() {
      if (!this.judge() || !this.clipSettings.shape) return;

      // 移除现有的背景对象
      if (this.editLayer.clipBackgroundObj) {
        this.fcanvas.remove(this.editLayer.clipBackgroundObj);
        this.editLayer.clipBackgroundObj = null;
      }

      const { shape, width, height, radius, offsetX, offsetY, rectRadius, fillColor, fillOpacity, strokeColor, strokeWidth } = this.clipSettings;

      let bgObj;

      if (shape === 'rect') {
        bgObj = new fabric.Rect({
          width: width,
          height: height,
          left: offsetX,
          top: offsetY,
          rx: rectRadius,
          ry: rectRadius,
          fill: fillColor,
          stroke: strokeColor,
          strokeWidth: strokeWidth,
          opacity: fillOpacity,
          selectable: false,
          evented: false,
          absolutePositioned: true
        });
      } else if (shape === 'circle') {
        bgObj = new fabric.Circle({
          radius: radius,
          left: offsetX,
          top: offsetY,
          fill: fillColor,
          stroke: strokeColor,
          strokeWidth: strokeWidth,
          opacity: fillOpacity,
          selectable: false,
          evented: false,
          absolutePositioned: true
        });
      }

      if (bgObj) {
        // 绑定到当前对象
        this.editLayer.clipBackgroundObj = bgObj;

        // 添加到画布
        this.fcanvas.add(markRaw(bgObj));

        // 确保层级正确：背景在最下面，图片在上面
        this.fcanvas.sendToBack(bgObj);
        this.fcanvas.bringToFront(this.editLayer);
      }
    },
    // 切换剪裁形状，自动填充默认值（位置跟随图层，尺寸为画布一半）
    onClipShapeChange(shape){
      if(!this.editLayer || this.editLayer.type !== 'image'){
        this.clipSettings.shape = shape
        return
      }
      if(!shape){
        this.clipSettings.shape = ''
        this.clearClipPath()
        this.updateClipPreview && this.updateClipPreview(true)
        return
      }
      const obj = this.editLayer
      const bounds = obj.getBoundingRect(true)
      const canvasW = this.fcanvas?.width || obj.canvas?.width || 800
      const canvasH = this.fcanvas?.height || obj.canvas?.height || 800
      const initWidth = Math.max(10, Math.round(canvasW / 2))
      const initHeight = initWidth // 高度和宽度保持一致
      const initRadius = Math.max(5, Math.round(Math.min(canvasW, canvasH) / 4))
      const initSettings = {
        shape,
        offsetX: Math.round(bounds.left),
        offsetY: Math.round(bounds.top),
        width: initWidth,
        height: initHeight,
        radius: initRadius,
        rectRadius: this.clipSettings.rectRadius || 0,
      }
      this.clipSettings = { ...this.clipSettings, ...initSettings }
      this.applyClipPath()
    },
    // 预览辅助，若用户保持旧样式可忽略 dataUrl
    updateClipPreview(force=false){
      if(!this.editLayer || this.editLayer.type !== 'image') return
      const obj = this.editLayer
      const bounds = obj.getBoundingRect(true)
      this.clipPreview = {
        ...this.clipPreview,
        maxOffsetX: Math.max(0, Math.floor(bounds.width)),
        maxOffsetY: Math.max(0, Math.floor(bounds.height)),
        maxWidth: Math.max(10, Math.floor(bounds.width)),
        maxHeight: Math.max(10, Math.floor(bounds.height)),
        maxRadius: Math.max(5, Math.floor(Math.min(bounds.width, bounds.height)/2)),
      }
      if(force || this.clipPreview.dataUrl === ''){
        try{
          // clone 可能是异步的（带 filters 时），使用回调形式避免 callback is not a function
          obj.clone((cloned)=>{
            if(!cloned) return
            const tmp = new fabric.Canvas(document.createElement('canvas'), { width: Math.min(200, bounds.width), height: Math.min(200, bounds.height) })
            cloned.scaleToWidth(tmp.width)
            tmp.add(cloned)
            tmp.renderAll()
            this.clipPreview.dataUrl = tmp.toDataURL({ format:'png', multiplier:1 })
            tmp.dispose()
          })
        }catch(e){
          console.warn('clip preview failed', e)
        }
      }
    },
    updateClipStroke() {
      if (!this.judge() || !this.clipSettings.showClipStroke) return;

      return;;

      const { shape, width, height, radius, offsetX, offsetY, strokeColor, strokeWidth, rectRadius } = this.clipSettings;

      // 移除当前对象已有的描边图形（如果存在）
      if (this.editLayer.strokeObj) {
        this.fcanvas.remove(this.editLayer.strokeObj);
        this.editLayer.strokeObj = null;
      }

      // 创建新的描边图形
      let strokeObj;
      if (shape === 'rect') {
        strokeObj = new fabric.Rect({
          width: width,
          height: height,
          left: offsetX,
          top: offsetY,
          rx: rectRadius,
          ry: rectRadius,
          stroke: strokeColor,
          sort:this.editLayer.sort,
          strokeWidth: strokeWidth,
          fill: null,
          selectable: false,
          evented: false
        });
      } else {
        strokeObj = new fabric.Circle({
          radius: radius,
          left: offsetX,
          top: offsetY,
          sort:this.editLayer.sort,
          stroke: strokeColor,
          strokeWidth: strokeWidth,
          fill: null,
          selectable: false,
          evented: false
        });
      }

      // 将描边图形绑定到当前对象
      this.editLayer.strokeObj = strokeObj;
      this.fcanvas.add(markRaw(strokeObj));
      this.fcanvas.requestRenderAll();
    },
    removeClipStroke() {
      if (this.clipStrokeObject) {
        this.fcanvas.remove(this.clipStrokeObject);
        this.clipStrokeObject = null;
      }
    },


    clearClipPath() {
      if (!this.judge()) return;

      // 清除剪裁路径
      this.editLayer.set({ clipPath: null });

      // 移除描边图形（如果存在）
      if (this.editLayer.strokeObj) {
        this.fcanvas.remove(this.editLayer.strokeObj);
        this.editLayer.strokeObj = null;
      }

      // 移除背景对象（如果存在）
      if (this.editLayer.clipBackgroundObj) {
        this.fcanvas.remove(this.editLayer.clipBackgroundObj);
        this.editLayer.clipBackgroundObj = null;
      }

      // 清除保存的裁剪设置
      delete this.editLayer.clipSettings;

      // 重置UI设置
      this.clipSettings = { ...DEFAULT_CLIP_SETTINGS };

      // 更新画布状态
      this.updateCanvasState();
      this.fcanvas.requestRenderAll();
    },

    // 更新图片尺寸
    updateImageSize(adjustedField) {
      if (!this.judge() || this.editLayer.type !== 'image') return;

      const { width, height, keepRatio } = this.imageSize;
      const originalWidth = this.editLayer.width;
      const originalHeight = this.editLayer.height;

      if (keepRatio) {
        // 保持宽高比的情况下，使用Fabric.js内置的scaleToWidth/scaleToHeight
        // 这些函数本身就会保持比例
        if (adjustedField === 'width') {
          this.editLayer.scaleToWidth(width);
          // 更新UI显示
          this.imageSize.height = Math.round(this.editLayer.getScaledHeight());
        } else {
          this.editLayer.scaleToHeight(height);
          // 更新UI显示
          this.imageSize.width = Math.round(this.editLayer.getScaledWidth());
        }
      } else {
        // 不保持比例的情况下，直接设置scaleX和scaleY
        const scaleX = width / originalWidth;
        const scaleY = height / originalHeight;

        this.editLayer.set({
          scaleX: scaleX,
          scaleY: scaleY
        });
      }

      // 重新计算边界和位置
      this.editLayer.setCoords();

      // 更新画布状态（撤销功能）
      this.updateCanvasState();
      this.fcanvas.requestRenderAll();

      // 更新剪裁预览（如果有剪裁）
      this.updateClipPreview && this.updateClipPreview(true);
    }

  }

}