"use client";

import { useState, useEffect, useRef } from "react";
import { useApp } from "@/contexts/AppContext";
import * as echarts from "echarts";

export default function APYHistoryCard() {
  const { t } = useApp();
  const [activeTab, setActiveTab] = useState<"apy" | "price">("apy");
  const chartRef = useRef<HTMLDivElement>(null);
  const chartInstance = useRef<echarts.ECharts | null>(null);

  // 生成从#FBEADE到#C65122的9个渐变颜色
  const getColorGradient = () => {
    const colors = [
      "#FBEADE",
      "#F5D4BE",
      "#EFBF9E",
      "#E9AA7E",
      "#E3955E",
      "#DD804E",
      "#D76B3E",
      "#D1562E",
      "#C65122",
    ];
    return colors;
  };

  const chartData = [4.2, 5.1, 5.8, 6.3, 7.1, 8.2, 9.5, 10.8, 12.4];

  useEffect(() => {
    if (chartRef.current) {
      chartInstance.current = echarts.init(chartRef.current);
      updateChart();
    }

    const handleResize = () => {
      chartInstance.current?.resize();
    };
    window.addEventListener("resize", handleResize);

    return () => {
      window.removeEventListener("resize", handleResize);
      chartInstance.current?.dispose();
    };
  }, [activeTab]);

  const updateChart = () => {
    if (!chartInstance.current) return;

    const colors = getColorGradient();

    // 模拟价格数据
    const priceData = [1.12, 1.15, 1.18, 1.14, 1.21, 1.19, 1.25, 1.28, 1.32];

    const option: echarts.EChartsOption = {
      grid: {
        left: 0,
        right: 0,
        top: 10,
        bottom: 0,
      },
      tooltip: {
        trigger: "axis",
        show: true,
        confine: true,
        backgroundColor: "rgba(17, 24, 39, 0.9)",
        borderColor: "#374151",
        textStyle: {
          color: "#f9fafb",
          fontSize: 12,
          fontWeight: 500,
        },
        formatter: function(params: any) {
          const data = params[0];
          const suffix = activeTab === "apy" ? "%" : " USDC";
          return `<div style="padding: 4px 8px;">
            <span style="color: #9ca3af; font-size: 11px;">Day ${data.dataIndex + 1}</span><br/>
            <span style="color: #10b981; font-weight: 600; font-size: 14px;">${data.value}${suffix}</span>
          </div>`;
        },
      },
      xAxis: {
        type: "category",
        data: chartData.map((_, i) => i + 1),
        axisLine: {
          show: false,
        },
        axisTick: {
          show: false,
        },
        axisLabel: {
          show: false,
        },
      },
      yAxis: {
        type: "value",
        axisLine: {
          show: false,
        },
        axisTick: {
          show: false,
        },
        axisLabel: {
          show: false,
        },
        splitLine: {
          show: false,
        },
      },
      series: [
        activeTab === "apy"
          ? {
              data: chartData.map((value, index) => ({
                value,
                itemStyle: {
                  color: colors[index],
                  borderRadius: [2, 2, 0, 0],
                },
              })),
              type: "bar",
              barWidth: "50%",
            }
          : {
              data: priceData,
              type: "line",
              smooth: true,
              symbol: "circle",
              symbolSize: 6,
              lineStyle: {
                color: "#10b981",
                width: 2,
              },
              itemStyle: {
                color: "#10b981",
              },
              areaStyle: {
                color: {
                  type: "linear",
                  x: 0,
                  y: 0,
                  x2: 0,
                  y2: 1,
                  colorStops: [
                    { offset: 0, color: "rgba(16, 185, 129, 0.3)" },
                    { offset: 1, color: "rgba(16, 185, 129, 0)" },
                  ],
                },
              },
            },
      ],
    };

    chartInstance.current.setOption(option);
  };

  return (
    <div className="bg-bg-surface dark:bg-gray-800 rounded-3xl border border-border-gray dark:border-gray-700 p-6 flex flex-col gap-6">
      {/* Tabs */}
      <div className="flex gap-6 border-b border-border-gray dark:border-gray-700">
        <button
          onClick={() => setActiveTab("apy")}
          className={`pb-3 px-1 text-body-small font-bold transition-colors ${
            activeTab === "apy"
              ? "text-text-primary dark:text-white border-b-2 border-text-primary dark:border-white -mb-[1px]"
              : "text-text-tertiary dark:text-gray-400"
          }`}
        >
          {t("apy.apyHistory")}
        </button>
        <button
          onClick={() => setActiveTab("price")}
          className={`pb-3 px-1 text-body-small font-bold transition-colors ${
            activeTab === "price"
              ? "text-text-primary dark:text-white border-b-2 border-text-primary dark:border-white -mb-[1px]"
              : "text-text-tertiary dark:text-gray-400"
          }`}
        >
          {t("apy.priceHistory")}
        </button>
      </div>

        {/* Chart Area */}
        <div className="flex flex-col gap-4">
          <div className="flex items-center justify-between">
            <span className="text-caption-tiny font-medium text-text-tertiary dark:text-gray-400">
              {t("apy.lastDays")}
            </span>
          </div>

          {/* ECharts Chart */}
          <div
            ref={chartRef}
            className="w-full"
            style={{
              height: "140px",
              background: activeTab === "price" 
                ? "linear-gradient(0deg, rgba(16, 185, 129, 0.1) 0%, transparent 100%)"
                : undefined,
            }}
          />

          {/* Stats */}
          <div className="flex flex-col gap-2">
            <div className="flex items-center justify-between">
              <span className="text-caption-tiny font-medium text-text-tertiary dark:text-gray-400">
                {t("apy.highest")}
              </span>
              <span className="text-body-small font-bold text-text-primary dark:text-white">
                {activeTab === "apy" ? "24.8%" : "$1.32"}
              </span>
            </div>
            <div className="flex items-center justify-between">
              <span className="text-caption-tiny font-medium text-text-tertiary dark:text-gray-400">
                {t("apy.lowest")}
              </span>
              <span className="text-body-small font-bold text-text-primary dark:text-white">
                {activeTab === "apy" ? "18.2%" : "$1.12"}
              </span>
            </div>
          </div>
        </div>
    </div>
  );
}