import React from "react";
import { Badge, Box, Skeleton, Tooltip } from "@chakra-ui/core";
import { ExternalLinkIcon, ChevronRightIcon } from "@chakra-ui/icons";

import {
  ItemBadgeList,
  ItemKindBadge,
  ItemThumbnail,
} from "./components/ItemCard";
import { Heading1 } from "./util";

function ItemPageLayout({ children, item, isEmbedded }) {
  return (
    <Box>
      <ItemPageHeader item={item} isEmbedded={isEmbedded} />
      <Box>{children}</Box>
    </Box>
  );
}

function ItemPageHeader({ item, isEmbedded }) {
  return (
    <Box
      display="flex"
      alignItems="center"
      justifyContent="flex-start"
      width="100%"
    >
      <SubtleSkeleton isLoaded={item?.thumbnailUrl} marginRight="4">
        <ItemThumbnail item={item} size="lg" isActive flex="0 0 auto" />
      </SubtleSkeleton>
      <Box>
        <SubtleSkeleton isLoaded={item?.name}>
          <Heading1
            lineHeight="1.1"
            // Nudge down the size a bit in the embed case, to better fit the
            // tighter layout!
            size={isEmbedded ? "xl" : "2xl"}
          >
            {item?.name || "Item name here"}
          </Heading1>
        </SubtleSkeleton>
        <ItemPageBadges item={item} isEmbedded={isEmbedded} />
      </Box>
    </Box>
  );
}

/**
 * SubtleSkeleton hides the skeleton animation until a second has passed, and
 * doesn't fade in the content if it loads near-instantly. This helps avoid
 * flash-of-content stuff!
 *
 * For plain Skeletons, we often use <Delay><Skeleton /></Delay> instead. But
 * that pattern doesn't work as well for wrapper skeletons where we're using
 * placeholder content for layout: we don't want the delay if the content
 * really _is_ present!
 */
export function SubtleSkeleton({ isLoaded, ...props }) {
  const [shouldFadeIn, setShouldFadeIn] = React.useState(false);
  const [shouldShowSkeleton, setShouldShowSkeleton] = React.useState(false);

  React.useEffect(() => {
    const t = setTimeout(() => {
      if (!isLoaded) {
        setShouldFadeIn(true);
      }
    }, 150);
    return () => clearTimeout(t);
  });

  React.useEffect(() => {
    const t = setTimeout(() => setShouldShowSkeleton(true), 500);
    return () => clearTimeout(t);
  });

  return (
    <Skeleton
      fadeDuration={shouldFadeIn ? undefined : 0}
      startColor={shouldShowSkeleton ? undefined : "transparent"}
      endColor={shouldShowSkeleton ? undefined : "transparent"}
      isLoaded={isLoaded}
      {...props}
    />
  );
}

function ItemPageBadges({ item, isEmbedded }) {
  const searchBadgesAreLoaded = item?.name != null && item?.isNc != null;

  return (
    <ItemBadgeList marginTop="1">
      <SubtleSkeleton isLoaded={item?.isNc != null}>
        <ItemKindBadge isNc={item.isNc} isPb={item.isPb} />
      </SubtleSkeleton>
      {
        // If the createdAt date is null (loaded and empty), hide the badge.
        item.createdAt !== null && (
          <SubtleSkeleton
            // Distinguish between undefined (still loading) and null (loaded and
            // empty).
            isLoaded={item.createdAt !== undefined}
          >
            <Badge
              display="block"
              minWidth="5.25em"
              boxSizing="content-box"
              textAlign="center"
            >
              {item.createdAt && <ShortTimestamp when={item.createdAt} />}
            </Badge>
          </SubtleSkeleton>
        )
      }
      <SubtleSkeleton isLoaded={searchBadgesAreLoaded}>
        <LinkBadge
          href={`https://impress.openneo.net/items/${item.id}`}
          isEmbedded={isEmbedded}
        >
          Classic DTI
        </LinkBadge>
      </SubtleSkeleton>
      <SubtleSkeleton isLoaded={searchBadgesAreLoaded}>
        <LinkBadge
          href={
            "https://items.jellyneo.net/search/?name=" +
            encodeURIComponent(item.name) +
            "&name_type=3"
          }
          isEmbedded={isEmbedded}
        >
          Jellyneo
        </LinkBadge>
      </SubtleSkeleton>
      <SubtleSkeleton isLoaded={searchBadgesAreLoaded}>
        {!item?.isNc && !item?.isPb && (
          <LinkBadge
            href={
              "http://www.neopets.com/market.phtml?type=wizard&string=" +
              encodeURIComponent(item.name)
            }
            isEmbedded={isEmbedded}
          >
            Shop Wiz
          </LinkBadge>
        )}
      </SubtleSkeleton>
      <SubtleSkeleton isLoaded={searchBadgesAreLoaded}>
        {!item?.isNc && !item?.isPb && (
          <LinkBadge
            href={
              "http://www.neopets.com/portal/supershopwiz.phtml?string=" +
              encodeURIComponent(item.name)
            }
            isEmbedded={isEmbedded}
          >
            Super Wiz
          </LinkBadge>
        )}
      </SubtleSkeleton>
      <SubtleSkeleton isLoaded={searchBadgesAreLoaded}>
        {!item?.isNc && !item?.isPb && (
          <LinkBadge
            href={
              "http://www.neopets.com/island/tradingpost.phtml?type=browse&criteria=item_exact&search_string=" +
              encodeURIComponent(item.name)
            }
            isEmbedded={isEmbedded}
          >
            Trade Post
          </LinkBadge>
        )}
      </SubtleSkeleton>
      <SubtleSkeleton isLoaded={searchBadgesAreLoaded}>
        {!item?.isNc && !item?.isPb && (
          <LinkBadge
            href={
              "http://www.neopets.com/genie.phtml?type=process_genie&criteria=exact&auctiongenie=" +
              encodeURIComponent(item.name)
            }
            isEmbedded={isEmbedded}
          >
            Auctions
          </LinkBadge>
        )}
      </SubtleSkeleton>
    </ItemBadgeList>
  );
}

function LinkBadge({ children, href, isEmbedded }) {
  return (
    <Badge
      as="a"
      href={href}
      display="flex"
      alignItems="center"
      // Normally we want to act like a normal webpage, and treat links as
      // normal. But when we're on the wardrobe page, we want to avoid
      // disrupting the outfit, and open in a new window instead.
      target={isEmbedded ? "_blank" : undefined}
    >
      {children}
      {
        // We also change the icon to signal whether this will launch in a new
        // window or not!
        isEmbedded ? <ExternalLinkIcon marginLeft="1" /> : <ChevronRightIcon />
      }
    </Badge>
  );
}

const fullDateFormatter = new Intl.DateTimeFormat("en-US", {
  dateStyle: "long",
});
const monthYearFormatter = new Intl.DateTimeFormat("en-US", {
  month: "short",
  year: "numeric",
});
const monthDayYearFormatter = new Intl.DateTimeFormat("en-US", {
  month: "short",
  day: "numeric",
  year: "numeric",
});
function ShortTimestamp({ when }) {
  const date = new Date(when);

  // To find the start of last month, take today, then set its date to the 1st
  // and its time to midnight (the start of this month), and subtract one
  // month. (JS handles negative months and rolls them over correctly.)
  const startOfLastMonth = new Date();
  startOfLastMonth.setDate(1);
  startOfLastMonth.setHours(0);
  startOfLastMonth.setMinutes(0);
  startOfLastMonth.setSeconds(0);
  startOfLastMonth.setMilliseconds(0);
  startOfLastMonth.setMonth(startOfLastMonth.getMonth() - 1);

  const dateIsOlderThanLastMonth = date < startOfLastMonth;

  return (
    <Tooltip
      label={`First seen on ${fullDateFormatter.format(date)}`}
      placement="top"
      openDelay={400}
    >
      {dateIsOlderThanLastMonth
        ? monthYearFormatter.format(date)
        : monthDayYearFormatter.format(date)}
    </Tooltip>
  );
}

export default ItemPageLayout;