import React, { useState, Fragment } from "react";
import { createRoot } from "react-dom/client";
import { AgCharts } from "ag-charts-react";
import {
  AgCartesianChartOptions,
  AgErrorBarItemStylerParams,
} from "ag-charts-enterprise";
import { getData, getData2 } from "./data";
import "ag-charts-enterprise";
import clone from "clone";

const highlightStyle = {
  item: { stroke: "red" },
  series: { dimOpacity: 0.3 },
};
const itemStyler = (param: AgErrorBarItemStylerParams<any>) => {
  const errorBarStyle = { strokeWidth: 3 };
  if (param.highlighted) {
    return { ...errorBarStyle, ...highlightStyle.item };
  } else {
    return errorBarStyle;
  }
};
function randomDelta(min: number, max: number) {
  return Math.random() * (max - min) + min;
}

const ChartExample = () => {
  const [options, setOptions] = useState<AgCartesianChartOptions>({
    title: {
      text: "Monthly Average Temperatures with Error Bars (Celsius)",
    },
    series: [
      {
        data: getData(),
        xKey: "month",
        yKey: "temperature",
        yName: "Canada",
        errorBar: {
          yLowerKey: "temperatureLower",
          yUpperKey: "temperatureUpper",
          itemStyler,
        },
        highlightStyle,
      },
      {
        data: getData2(),
        xKey: "month",
        yKey: "temperature",
        yName: "Australia",
        errorBar: {
          yLowerKey: "temperatureLower",
          yUpperKey: "temperatureUpper",
          itemStyler,
        },
        highlightStyle,
      },
    ],
  });

  const line = () => {
    const nextOptions = clone(options);

    if (nextOptions.series !== undefined) {
      for (const opt of nextOptions.series) {
        opt.type = "line";
      }
    }

    setOptions(nextOptions);
  };

  const bar = () => {
    const nextOptions = clone(options);

    if (nextOptions.series !== undefined) {
      for (const opt of nextOptions.series) {
        opt.type = "bar";
      }
    }

    setOptions(nextOptions);
  };

  const resetData = () => {
    const nextOptions = clone(options);

    if (nextOptions.series !== undefined) {
      nextOptions.series[0].data = getData();
      nextOptions.series[1].data = getData2();
    }

    setOptions(nextOptions);
  };

  const removeOdds = () => {
    const nextOptions = clone(options);

    if (nextOptions.series !== undefined) {
      const fn = (_value: Datum, index: number): boolean => {
        return index % 2 === 0;
      };
      nextOptions.series[0].data = getData().filter(fn);
      nextOptions.series[1].data = getData2().filter(fn);
    }

    setOptions(nextOptions);
  };

  const removeOddsErrors = () => {
    const nextOptions = clone(options);

    if (nextOptions.series !== undefined) {
      const fn = (value: Datum, index: number): Datum => {
        if (index % 2 === 1) {
          const { month, temperature } = value;
          return { month, temperature };
        } else {
          return value;
        }
      };
      nextOptions.series[0].data = getData().map(fn);
      nextOptions.series[1].data = getData2().map(fn);
    }

    setOptions(nextOptions);
  };

  const randomiseData = () => {
    const nextOptions = clone(options);

    if (nextOptions.series !== undefined) {
      const fn = (value: Datum): Datum => {
        const delta = randomDelta(-4, 4);
        const { month, temperature, temperatureLower, temperatureUpper } =
          value;
        if (temperatureLower === undefined || temperatureUpper === undefined) {
          return {
            month,
            temperature: temperature + delta,
          };
        } else {
          return {
            month,
            temperature: temperature + delta,
            temperatureLower: temperatureLower + delta,
            temperatureUpper: temperatureUpper + delta,
          };
        }
      };
      nextOptions.series[0].data = nextOptions.series[0].data?.map(fn);
      nextOptions.series[1].data = nextOptions.series[1].data?.map(fn);
    }

    setOptions(nextOptions);
  };

  const randomiseErrors = () => {
    const nextOptions = clone(options);

    if (nextOptions.series !== undefined) {
      const fn = (value: Datum): Datum => {
        const { month, temperature, temperatureLower, temperatureUpper } =
          value;
        if (temperatureLower === undefined || temperatureUpper === undefined) {
          return { month, temperature };
        }
        return {
          month,
          temperature,
          temperatureLower: value.temperature - randomDelta(0, 2.5),
          temperatureUpper: value.temperature + randomDelta(0, 2.5),
        };
      };
      nextOptions.series[0].data = nextOptions.series[0].data?.map(fn);
      nextOptions.series[1].data = nextOptions.series[1].data?.map(fn);
    }

    setOptions(nextOptions);
  };

  return (
    <Fragment>
      <div className="toolbar">
        <button onClick={line}>Line</button>
        <button onClick={bar}>Bar</button>
        <button onClick={resetData}>Reset Data</button>
        <button onClick={removeOdds}>No Odd Months</button>
        <button onClick={removeOddsErrors}>No Odd Errors</button>
        <button onClick={randomiseData}>Randomise Data</button>
        <button onClick={randomiseErrors}>Randomise Errors</button>
      </div>
      <AgCharts options={options as any} />
    </Fragment>
  );
};

const root = createRoot(document.getElementById("root")!);
root.render(<ChartExample />);

/** DARK MODE START **/
import { AgCharts as __chartAPI } from "ag-charts-community";

let darkmode =
  (localStorage["documentation:darkmode"] ||
    String(matchMedia("(prefers-color-scheme: dark)").matches)) === "true";

const isAgThemeOrUndefined = (theme) => {
  return (
    theme == null || (typeof theme === "string" && theme.startsWith("ag-"))
  );
};

const getDarkmodeTheme = (theme = "ag-default", preset) => {
  const baseTheme =
    preset === "price-volume" ? "ag-financial" : theme.replace(/-dark$/, "");
  return darkmode ? baseTheme + "-dark" : baseTheme;
};

__chartAPI.optionsMutationFn = function update(options, preset) {
  const nextOptions = { ...options };
  const theme = options.theme;
  if (isAgThemeOrUndefined(theme)) {
    nextOptions.theme = getDarkmodeTheme(theme, preset);
  } else if (
    typeof theme === "object" &&
    isAgThemeOrUndefined(theme.baseTheme)
  ) {
    nextOptions.theme = {
      ...options.theme,
      baseTheme: getDarkmodeTheme(theme.baseTheme, preset),
    };
  }
  return nextOptions;
};

const applyDarkmode = () => {
  document.documentElement.setAttribute("data-dark-mode", darkmode);
  const charts = document.querySelectorAll("[data-ag-charts]");
  charts.forEach((element) => {
    const chart = __chartAPI.getInstance(element.parentElement);
    if (chart == null) return;
    // This is just needed to trigger the theme update
    chart.update(chart.getOptions());
  });
  return charts.length !== 0;
};

if (!applyDarkmode()) {
  /* React defers updates. Rather than try and hook into the API, just wait until the darkmode is applied. */
  const observer = new MutationObserver(() => {
    if (applyDarkmode()) {
      observer.disconnect();
    }
  });
  observer.observe(document.body, {
    attributes: true,
    childList: true,
    subtree: true,
  });
}
window.addEventListener("message", (event) => {
  if (event.data && event.data.type === "color-scheme-change") {
    darkmode = event.data.darkmode;
    applyDarkmode();
  }
});
/** DARK MODE END **/