import { h } from "preact"
import { useRef, useCallback } from "preact/hooks"

import { Sticker, Stickerbook } from "./lib"
import { addSticker, exportStickerbook } from "./lib/helpers"
import { useStickerbook } from "./lib/use-stickerbook"

import backgroundImage2 from "./background-2.png"
import frameImage from "./frame.png"
import foregroundImage from "./foreground.png"
import foregroundImage2 from "./foreground-2.png"
import stickerImage from "./sticker.png"
import patternImage from "./sweet-potato-pattern.jpg"

const CANVAS_SIZE = {
  width: 500,
  height: 500,
}

const GIPHY_API_URL = new URL("https://api.giphy.com/v1/stickers/random")

GIPHY_API_URL.search = new URLSearchParams({
  api_key: "a8s5d1Dw5bitDbTPHgVHVfaYv0cRAQf8",
}).toString()

export function App() {
  const {
    stickers,
    setStickers,
    backgrounds,
    foregrounds,
    frames,
    onReorderSticker,
    onDeleteSticker,
    onPositionSticker,
    onScaleSticker,
    onRotateSticker,
  } = useStickerbook({
    initialStickers: [
      {
        id: "my-id-1",
        image: stickerImage,
        order: 0,
      },
    ],
    initialFrames: [
      {
        image: frameImage,
      },
    ],
    initialBackgrounds: [
      {
        image: patternImage,
        type: "pattern",
      },
      {
        image: backgroundImage2,
        type: "scene",
      },
    ],
    initialForegrounds: [
      {
        image: foregroundImage,
      },
      {
        image: foregroundImage2,
      },
    ],
  })

  const downloadRef = useRef<HTMLAnchorElement | null>(null)

  const onAddSticker = useCallback(async () => {
    try {
      const res = await fetch(GIPHY_API_URL).then((res) => res.json())

      const {
        data: {
          images: {
            preview_gif: { url },
          },
          caption,
        },
      } = res

      setStickers((stickers) =>
        addSticker({ stickers, sticker: { image: url, alt: caption } })
      )
    } catch (err) {
      console.error(err)
    }
  }, [setStickers])

  // Download
  const onClickDownload = async (e: Event) => {
    e.preventDefault()

    const downloadLink = downloadRef.current

    if (!downloadLink) return

    const newUrl = await exportStickerbook<"image">({
      outputWidth: CANVAS_SIZE.width,
      outputHeight: CANVAS_SIZE.height,
      stickers,
      backgrounds,
      frames,
      foregrounds,
      format: "image",
    })

    downloadLink.href = newUrl
    downloadLink.click()
  }

  return (
    <>
      <button onClick={onAddSticker}>Add random sticker from GIPHY</button>

      <button onClick={onClickDownload}>Download</button>

      <a ref={downloadRef} hidden={true} href="#" download="Stickerbook.png" />

      <div
        style={Object.entries(CANVAS_SIZE).reduce((acc, [key, val]) => {
          return { ...acc, [`max-${key}`]: `${val}px` }
        }, {})}
      >
        <Stickerbook
          outputWidth={CANVAS_SIZE.width}
          outputHeight={CANVAS_SIZE.height}
          backgrounds={backgrounds}
          frames={frames}
          foregrounds={foregrounds}
        >
          {stickers.map((sticker) => (
            <Sticker
              key={sticker.id}
              initialPosition={sticker.position}
              initialRotation={sticker.rotation}
              initialScale={sticker.scale}
              onReorder={onReorderSticker}
              onDelete={onDeleteSticker}
              onPosition={onPositionSticker}
              onScale={onScaleSticker}
              onRotate={onRotateSticker}
              disableRotation={sticker.disableRotation}
              {...sticker}
            />
          ))}
        </Stickerbook>
      </div>

      <a href="https://giphy.com/" target="_blank" rel="noreferrer">
        <img
          src="https://media.giphy.com/media/3o6gbbuLW76jkt8vIc/giphy.gif"
          alt="Powered By GIPHY"
          width="100"
        />
      </a>
    </>
  )
}