<template>
  <div style="width: 100%; height: 500px">
    <!-- 2D散点图 -->
    <div style="display: flex; align-items: center; padding-top: 20px">
      <div style="margin-right: 20px; display: flex; align-items: center">
        <el-select
          size="small"
          v-model="color1"
          @change="updateChartColor"
          placeholder="选择配色方案"
          style="width: 200px"
        >
          <el-option
            v-for="(scheme, index) in colorSchemes"
            :key="index"
            :label="scheme.label"
            :value="scheme.colors"
            :style="getOptionStyle(scheme.colors)"
          ></el-option>
        </el-select>
        <span style="margin-left: 10px">自定义颜色</span>
      </div>
      <!-- 图表类型切换按钮 -->
      <div>
        <el-button size="small" @click="setChartType('scatter')"
          >散点图</el-button
        >
        <el-button size="small" @click="setChartType('line')">折线图</el-button>
      </div>
    </div>
    <!-- 点大小控制 -->
    <div style="display: flex; align-items: center">
      <!-- <span style="margin-right: 10px">点大小</span> -->
      <el-slider
        v-model="pointSize"
        :min="1"
        :max="15"
        :step="1"
        label="点的大小"
        show-stops
        style="width: 150px"
        @change="updateChartColor"
      ></el-slider>
    </div>
    <div
      v-loading="loading"
      :ref="'plotlyChart-' + index"
      style="width: 100%; height: 450px"
    >
      <el-empty v-if="isError" description="请求失败"></el-empty>
    </div>
  </div>
</template>

<script>
import Plotly from "plotly.js-dist";
import axios from "axios";
import { myMixin } from "@/mixins/chartRequestMixin";
import { colorSchemes } from "@/views/overview/js/colors";
export default {
  props: {
    fileAddr: {
      default: "",
      type: String,
    },
    index: {
      type: String,
    },
  },
  data() {
    return {
      pointSize: 5, // 默认点大小
      color1: colorSchemes[0].colors, // 默认颜色
      // 配色方案列表（每个方案是一个颜色数组）
      colorSchemes: [...colorSchemes],
      chartData: {},
      chartType: "scatter", // 初始化为散点图 (scatter)
      // color1: "", // 默认颜色
      selectedPoints: [],
      originalColors: [],
      originalSizes: [],
    };
  },
  mixins: [myMixin],
  async mounted() {
    this.getData();
  },
  methods: {
    // 根据配色方案设置每个选项的样式
    getOptionStyle(scheme) {
      return {
        background: `linear-gradient(to right, ${scheme.join(", ")})`,
        color: "#fff",
        height: "30px",
        lineHeight: "30px",
        borderRadius: "4px",
      };
    },
    async getData() {
      if (this.fileAddr !== "") {
        try {
          this.loading = true;
          this.cancelToken = axios.CancelToken.source();
          const resultChartsData = await axios.get(this.fileAddr, {
            cancelToken: this.cancelToken.token,
          });
          if (typeof resultChartsData.data === "string") {
            let dataString = resultChartsData.data;
            // 如果数据字符串的开头和结尾可能有多余的字符（比如非法字符），可以进行清理
            dataString = dataString.trim(); // 去除前后空格
            // 如果数据包含了类似 "Infinity" 或其他无法解析的字符，替换它们
            dataString = dataString.replace(/Infinity/g, '"Infinity"'); // 例如，将 "Infinity" 转换为字符串
            try {
              const parsedData = JSON.parse(dataString);
              this.chartData = parsedData;
            } catch (error) {
              console.error("JSON 解析失败:", error);
            }
          } else {
            this.chartData = resultChartsData.data;
          }
          this.drawChart();
          this.isError = false;
          this.loading = false;
        } catch (error) {
          this.isError = true;
          this.loading = false;
        }
      }
    },
    // 清理非法字符（如换行符等）
    cleanJsonString(jsonString) {
      return jsonString.replace(/[\n\r\t]/g, "").replace(/,\s*([\]}])/g, "$1"); // 清理换行符等
    },
    drawChart() {
      if (!this.$refs[`plotlyChart-${this.index}`]) {
        return false;
      }
      const data = this.chartData.data && this.chartData.data[0];
      let trace = {};
      // 保存原始颜色和大小
      this.originalColors = [...data.yData];
      this.originalSizes = new Array(data.xData.length).fill(6); // 初始点大小
      if (this.chartType === "scatter") {
        // 绘制 2D 散点图
        console.log("重新绘制图表", this.color1);
        trace = {
          x: data.xData,
          y: data.yData,
          mode: "markers",
          type: "scattergl", // 这里改为 scattergl
          text: data.engineName, // 提示文本
          marker: {
            color: data.yData, // 根据 yData 的值设置颜色
            // colorscale: "Viridis", // 使用的颜色区间
            colorscale: this.color1
              ? [
                  [0, "#F9FDD2"], // 颜色从 this.color1 开始
                  [1, this.color1], // 结束颜色为其他颜色
                ]
              : [
                  [0, "#F9FDD2"],
                  [0.15, "#E9F6BD"],
                  [0.3, "#C2E3B9"],
                  [0.45, "#8AC8BE"],
                  [0.6, "#5CA8BF"],
                  [0.75, "#407DB3"],
                  [0.9, "#2E4C9A"],
                  [1, "#1B2973"],
                ],
            colorbar: {
              title: data.colorbartitle, // 色标标题
            },
            size: new Array(data.xData.length).fill(this.pointSize), // 点的大小
          },
          hovertemplate:
            `${this.chartData.xaixs}:` +
            ` %{x} <br> ` +
            `${this.chartData.yaixs}:` +
            "%{y} <br> <extra></extra>",
          // customdata: data.colorbar || data.color, // 将格式化后的时间存入 customdata
        };
      } else if (this.chartType === "line") {
        // 折线图
        trace = {
          x: data.xData,
          y: data.yData,
          mode: "lines",
          type: "scattergl", // 折线图
          text: data.engineName,
          line: {
            color: this.color1, // 使用自定义颜色
          },
        };
      } else if (this.chartType === "bar") {
        // 柱状图
        trace = {
          x: data.xData,
          y: data.yData,
          type: "bar", // 柱状图
          marker: {
            color: this.color1, // 使用自定义颜色
          },
        };
      }
      // 图表布局;
      const layout = {
        title: data.title,
        xaxis: {
          title: this.chartData.xaixs,
          gridcolor: "rgb(255,255,255)", // 网格线颜色
          tickcolor: "rgb(255,255,255)",
          backgroundcolor: "#e5ecf6",
          showbackground: true, // 显示背景
        },
        yaxis: {
          title: this.chartData.yaixs,
          gridcolor: "rgb(255,255,255)", // 网格线颜色
          tickcolor: "rgb(255,255,255)",
          backgroundcolor: "#e5ecf6",
          showbackground: true, // 显示背景
        },
        showlegend: false,
        plot_bgcolor: "#e5ecf6",
        gridcolor: "#fff", // 设置网格线颜色
        // plot_bgcolor: "rad",
        // gridcolor: "#d3d3d3", // 设置网格线颜色
      };
      const config = {
        modeBarButtonsToAdd: [
          {
            name: "选择",
            icon: Plotly.Icons.pencil,
            click: (gd) => this.handleSelectClick(gd),
          },
          {
            name: "清除选中",
            icon: Plotly.Icons.undo,
            click: (gd) => this.handleClearSelect(gd),
          },
          {
            name: "下载CSV文件",
            icon: Plotly.Icons.disk,
            click: (gd) => this.handleDownloadCSV(gd),
          },
        ],
        modeBarButtonsToRemove: [
          // 移除不需要的工具按钮
          "lasso2d",
        ],
        displaylogo: false,
        editable: true,
        scrollZoom: false,
      };
      // 使用 Plotly 绘制图表
      Plotly.react(
        this.$refs[`plotlyChart-${this.index}`],
        [trace],
        layout,
        config
      ).then(() => {
        // 确保在图表加载完成后设置工具栏按钮
        const plotElement = this.$refs[`plotlyChart-${this.index}`];
        Plotly.relayout(plotElement, layout); // 使用 relayout 来确保自定义按钮应用
      });
    },

    handleSelectClick(gd) {
      // 绑定 plotly_click 事件
      gd.on("plotly_click", (data) => {
        const pointIndex = data.points[0].pointIndex;
        const xClick = data.points[0].x;
        const yClick = data.points[0].y;

        // 将点击的点添加到选中的点数组
        this.selectedPoints.push({
          x: xClick, // 点击点的 x 坐标
          y: yClick, // 点击点的 y 坐标
          index: pointIndex, // 点击点的索引
          time: data.points[0].text, // 点击点的时间信息
        });

        // 初始化颜色和大小数组
        let newColors = [...this.originalColors];
        let newSize = [...this.originalSizes];

        // 如果选中的点数大于等于3，进行多边形选择区域的处理
        if (this.selectedPoints.length >= 3) {
          const xv = this.selectedPoints.map((p) => p.x);
          const yv = this.selectedPoints.map((p) => p.y);

          // 判断点是否在多边形内
          function inPolygon(x, y, xv, yv) {
            let inside = false;
            for (let i = 0, j = xv.length - 1; i < xv.length; j = i++) {
              const intersect =
                yv[i] > y !== yv[j] > y &&
                x < ((xv[j] - xv[i]) * (y - yv[i])) / (yv[j] - yv[i]) + xv[i];
              if (intersect) inside = !inside;
            }
            return inside;
          }

          // 用于跟踪已添加的 (x, y) 组合
          const addedPoints = {};

          // 遍历图表数据中的所有点，检查是否在多边形内
          gd.data[0].x.forEach((xVal, i) => {
            const yVal = gd.data[0].y[i];
            if (inPolygon(xVal, yVal, xv, yv)) {
              const pointKey = `${xVal}-${yVal}`;
              if (!addedPoints[pointKey]) {
                this.selectedPoints.push({
                  x: gd.data[0].x[i],
                  y: gd.data[0].y[i],
                  time: gd.data[0].text[i],
                });

                newColors[i] = "red"; // 高亮选择的点
                newSize[i] = 10; // 设置点的大小
                addedPoints[pointKey] = true;
              }
            }
          });
        }

        // 更新选中点的颜色和大小
        this.selectedPoints.forEach((point) => {
          newColors[point.index] = "red";
          newSize[point.index] = 10;
        });

        // 使用 Plotly.restyle 更新颜色和大小
        Plotly.restyle(gd, {
          "marker.color": [newColors],
          "marker.size": [newSize],
        });

        // 处理选中的数据
        this.getSelectData(this.selectedPoints, gd.layout);
      });
    },

    handleClearSelect(gd) {
      this.selectedPoints = [];
      Plotly.restyle(gd, {
        "marker.color": [this.originalColors],
        "marker.size": [this.originalSizes],
      });
    },
    getSelectData(selectedPoints, layout) {
      // 在这里处理选中的数据，您可以将其展示或导出等
      console.log("选中的点数据：", selectedPoints);
      console.log("布局信息：", layout);
    },
    handleDownloadCSV(gd) {
      if (this.selectedPoints.length === 0) {
        alert("没有选中的数据");
        return;
      }
      this.downloadCSV();
    },

    downloadCSV() {
      const headers = [this.chartData.xaixs, this.chartData.yaixs];
      const csvRows = [headers]; // 保存标头
      // 使用 Set 或 Map 去重
      const uniquePoints = [];
      this.selectedPoints.forEach((point) => {
        if (!uniquePoints.some((p) => p.x === point.x && p.y === point.y)) {
          uniquePoints.push(point);
        }
      });

      // 将去重后的点加入 CSV 数据
      uniquePoints.forEach((point) => {
        csvRows.push(`${point.x},${point.y}`);
      });

      const csvString = csvRows.join("\n");
      const blob = new Blob([csvString], { type: "text/csv; charset=utf-8" });
      const url = URL.createObjectURL(blob);
      const a = document.createElement("a");
      a.href = url;
      a.download = "selected_data.csv";
      a.click();
      URL.revokeObjectURL(url);
    },
    setChartType(type) {
      // 切换图表类型
      this.chartType = type;
      this.drawChart(); // 重新绘制图表
    },

    updateChartColor(color) {
      // 更新图表颜色
      // this.color1 = color;
      console.log(this.color1, "this.color1");
      this.drawChart();
    },
  },
};
</script>

<style scoped></style>
