import React, { useRef, useEffect } from "react";
import { useRecoilValue, useSetRecoilState } from "recoil";
import { useHotkeys } from "react-hotkeys-hook";
import { motion } from "framer-motion";
import { Svg2Png } from "svg2png-converter";
import { saveAs } from "file-saver";
import { Copy, X, CheckCircle, Download } from "phosphor-react";
import ReactGA from "react-ga";

import {
  iconWeightAtom,
  iconSizeAtom,
  iconColorAtom,
  iconPreviewOpenAtom,
} from "../../state/atoms";
import useTransientState from "../../hooks/useTransientState";
import TagCloud from "./TagCloud";
import { IconEntry } from "../../lib";

const panelVariants = {
  open: {
    opacity: 1,
    height: "100%",
    marginTop: "4px",
    marginBottom: "4px",
    transition: { type: "tween", duration: 0.1 },
  },
  collapsed: {
    opacity: 0,
    height: "0px",
    marginTop: "0px",
    marginBottom: "0px",
    transition: { type: "tween", duration: 0.1 },
  },
};

const contentVariants = {
  open: { opacity: 1, transition: { duration: 0.2, delay: 0.1 } },
  collapsed: { opacity: 0, transition: { duration: 0 } },
};

const buttonColor = "#35313D";
const successColor = "#1FA647";
const disabledColor = "#B7B7B7";

interface InfoPanelProps {
  index: number;
  spans: number;
  isDark: boolean;
  entry: IconEntry;
}

const DetailsPanel: React.FC<InfoPanelProps> = (props) => {
  const { index, spans, isDark, entry } = props;
  const { name, Icon, categories, tags } = entry;
  const weight = useRecoilValue(iconWeightAtom);
  const size = useRecoilValue(iconSizeAtom);
  const color = useRecoilValue(iconColorAtom);
  const setOpen = useSetRecoilState(iconPreviewOpenAtom);
  const [copied, setCopied] = useTransientState<string | false>(false, 2000);
  const ref = useRef<SVGSVGElement>(null);

  useHotkeys("esc", () => setOpen(false));

  useEffect(
    () => ReactGA.event({ category: "Grid", action: "Details", label: name }),
    [name]
  );

  const buttonBarStyle: React.CSSProperties = {
    color: isDark ? "white" : buttonColor,
  };
  const snippetButtonStyle: React.CSSProperties =
    weight === "duotone"
      ? { color: disabledColor, userSelect: "none" }
      : { color: buttonColor };

  const snippets = {
    html:
      weight === "duotone"
        ? "This weight is not yet supported"
        : `<i class="ph-${name}${
            weight === "regular" ? "" : `-${weight}`
          }"></i>`,
    react: `<${Icon.displayName} size={${size}} ${
      color !== "#000000" ? `color="${color}" ` : ""
    }${weight === "regular" ? "" : `weight="${weight}" `}/>`,
    vue: `<ph${Icon.displayName!.replace(
      /([a-z0-9]|(?=[A-Z]))([A-Z])/g,
      "$1-$2"
    ).toLowerCase()} :size="${size}" ${
      color !== "#000000" ? `color="${color}" ` : ""
    }${weight === "regular" ? "" : `weight="${weight}" `}/>`,
    flutter: 
      weight === "duotone"
        ? "This weight is not yet supported"
        : `Icon(\n  PhosphorIcons.${
            Icon.displayName!.replace(/^\w/, (c) => c.toLowerCase())
          }${weight === "regular"
            ? ""
            : weight.replace(/^\w/, (c) => c.toUpperCase())
          },\n  size: ${size.toFixed(1)},\n  color: Color(0xff${
            color.replace("#", "")
          }),\n)`,
  };

  const handleCopySnippet = (
    event: React.MouseEvent<HTMLButtonElement, MouseEvent>,
    type: "html" | "react" | "vue" | "flutter"
  ) => {
    event.currentTarget.blur();
    setCopied(type);
    const data = snippets[type];
    data && void navigator.clipboard?.writeText(data);
  };

  const handleCopySVG = (
    event: React.MouseEvent<HTMLButtonElement, MouseEvent>
  ) => {
    event.currentTarget.blur();
    setCopied("svg");
    ref.current && void navigator.clipboard?.writeText(ref.current.outerHTML);
  };

  const handleDownloadSVG = (
    event: React.MouseEvent<HTMLButtonElement, MouseEvent>
  ) => {
    event.currentTarget.blur();
    if (!ref.current?.outerHTML) return;
    const blob = new Blob([ref.current.outerHTML]);
    saveAs(blob, `${name}${weight === "regular" ? "" : `-${weight}`}.svg`);
  };

  const handleDownloadPNG = async (
    event: React.MouseEvent<HTMLButtonElement, MouseEvent>
  ) => {
    event.currentTarget.blur();
    if (!ref.current?.outerHTML) return;
    Svg2Png.save(
      ref.current,
      `${name}${weight === "regular" ? "" : `-${weight}`}.png`,
      { scaleX: 2.667, scaleY: 2.667 }
    );
  };

  return (
    <motion.section
      className="info-box"
      animate="open"
      exit="collapsed"
      variants={panelVariants}
      style={{
        order: index + (spans - (index % spans)),
        color: isDark ? "white" : "black",
      }}
    >
      <motion.div
        initial="collapsed"
        animate="open"
        exit="collapsed"
        variants={contentVariants}
        className="icon-preview"
      >
        <Icon ref={ref} color={color} weight={weight} size={192} />
        <p>{name}</p>
        <TagCloud
          name={name}
          tags={Array.from(
            new Set<string>([...categories, ...name.split("-"), ...tags])
          )}
          isDark={isDark}
        />
      </motion.div>
      <motion.div
        initial="collapsed"
        animate="open"
        exit="collapsed"
        variants={contentVariants}
        className="icon-usage"
      >
        <div className="snippet">
          React
          <pre tabIndex={0}>
            <span>{snippets.react}</span>
            <button
              title="Copy snippet"
              onClick={(e) => handleCopySnippet(e, "react")}
            >
              {copied === "react" ? (
                <CheckCircle size={24} color={successColor} weight="fill" />
              ) : (
                <Copy size={24} color={buttonColor} weight="fill" />
              )}
            </button>
          </pre>
        </div>
        <div className="snippet">
          Vue
          <pre tabIndex={0}>
            <span>{snippets.vue}</span>
            <button
              title="Copy snippet"
              onClick={(e) => handleCopySnippet(e, "vue")}
            >
              {copied === "vue" ? (
                <CheckCircle size={24} color={successColor} weight="fill" />
              ) : (
                <Copy size={24} color={buttonColor} weight="fill" />
              )}
            </button>
          </pre>
        </div>
        <div className="snippet">
          HTML/CSS
          <pre tabIndex={0} style={snippetButtonStyle}>
            <span>{snippets.html}</span>
            <button
              title="Copy snippet"
              onClick={(e) => handleCopySnippet(e, "html")}
              disabled={weight === "duotone"}
              style={snippetButtonStyle}
            >
              {copied === "html" ? (
                <CheckCircle size={24} color={successColor} weight="fill" />
              ) : (
                <Copy
                  size={24}
                  color={snippetButtonStyle.color}
                  weight="fill"
                />
              )}
            </button>
          </pre>
        </div>
        <div className="snippet">
          Flutter
          <pre tabIndex={0} style={snippetButtonStyle}>
            <span>{snippets.flutter}</span>
            <button
              title="Copy snippet"
              onClick={(e) => handleCopySnippet(e, "flutter")}
              disabled={weight === "duotone"}
              style={snippetButtonStyle}
            >
              {copied === "flutter" ? (
                <CheckCircle size={24} color={successColor} weight="fill" />
              ) : (
                <Copy size={24} color={snippetButtonStyle.color} weight="fill" />
              )}
            </button>
          </pre>
        </div>

        <div className="button-row">
          <button style={buttonBarStyle} onClick={handleDownloadPNG}>
            <Download size={32} color="currentColor" weight="fill" /> Download
            PNG
          </button>
          <button style={buttonBarStyle} onClick={handleDownloadSVG}>
            <Download size={32} color="currentColor" weight="fill" /> Download
            SVG
          </button>
          <button style={buttonBarStyle} onClick={handleCopySVG}>
            {copied === "svg" ? (
              <CheckCircle size={32} color={successColor} weight="fill" />
            ) : (
              <Copy size={32} color="currentColor" weight="fill" />
            )}
            {copied === "svg" ? "Copied!" : "Copy SVG"}
          </button>
        </div>
      </motion.div>
      <motion.span
        initial="collapsed"
        animate="open"
        exit="collapsed"
        variants={contentVariants}
        title="Close"
      >
        <X
          className="close-icon"
          tabIndex={0}
          color={buttonBarStyle.color}
          size={32}
          weight="fill"
          onClick={() => setOpen(false)}
          onKeyDown={(e) => {
            e.key === "Enter" && setOpen(false);
          }}
        />
      </motion.span>
    </motion.section>
  );
};

export default DetailsPanel;