(function () {
    let target = null
    let holdTimer = null
    let pick = null
    let crack = null
    let startTime = null
    const mineTime = 3000

    const pickaxe = "https://freepngimg.com/thumb/minecraft/94806-square-angle-pocket-edition-pickaxe-minecraft.png"
    const breakImg = "https://www.onlygfx.com/wp-content/uploads/2018/02/crack-3.png"

    function avgColor(el) {
        const r = el.getBoundingClientRect()
        const c = document.createElement("canvas")
        c.width = Math.max(1, r.width)
        c.height = Math.max(1, r.height)
        const ctx = c.getContext("2d")

        try {
            ctx.drawImage(el, 0, 0, c.width, c.height)
            const data = ctx.getImageData(0, 0, c.width, c.height).data
            let rSum = 0, gSum = 0, bSum = 0
            for (let i = 0; i < data.length; i += 4) {
                rSum += data[i]
                gSum += data[i + 1]
                bSum += data[i + 2]
            }
            const count = data.length / 4
            return `rgb(${rSum / count}, ${gSum / count}, ${bSum / count})`
        } catch (e) {
            const cs = getComputedStyle(el)
            return cs.backgroundColor || "gray"
        }
    }

    function spawnDebris(el, intense = false) {
        const r = el.getBoundingClientRect()
        const baseColor = avgColor(el)
        const amount = intense ? 15 : 3

        for (let i = 0; i < amount; i++) {
            const d = document.createElement("div")
            d.style.position = "fixed"
            d.style.width = "6px"
            d.style.height = "6px"
            d.style.background = baseColor
            d.style.left = (r.left + r.width / 2) + "px"
            d.style.top = (r.top + r.height / 2) + "px"
            d.style.pointerEvents = "none"
            d.style.borderRadius = "2px"
            d.style.transition = "opacity 0.6s linear"
            document.body.appendChild(d)

            const angle = Math.random() * Math.PI * 2
            const dist = intense ? 60 : 25
            const x = Math.cos(angle) * dist
            const y = Math.sin(angle) * dist

            setTimeout(() => {
                d.style.transform = `translate(${x}px, ${y}px)`
                d.style.opacity = "0"
            }, 10)

            setTimeout(() => d.remove(), 700)
        }
    }

    function spawnPick(x, y) {
        pick = document.createElement("img")
        pick.src = pickaxe
        pick.style.position = "fixed"
        pick.style.left = x + "px"
        pick.style.top = y + "px"
        pick.style.width = "60px"
        pick.style.pointerEvents = "none"
        pick.style.transformOrigin = "bottom center"
        pick.style.transition = "transform 0.1s ease-in-out"
        document.body.appendChild(pick)

        let flip = false
        pick._int = setInterval(() => {
            flip = !flip
            pick.style.transform = flip ? "rotate(90deg)" : "rotate(0deg)"
        }, 100)
    }

    function spawnCrack(el) {
        crack = document.createElement("img")
        crack.src = breakImg
        crack.style.position = "absolute"

        const r = el.getBoundingClientRect()
        crack.style.left = r.left + "px"
        crack.style.top = r.top + "px"
        crack.style.width = r.width + "px"
        crack.style.height = r.height + "px"
        crack.style.pointerEvents = "none"
        crack.style.opacity = "1"
        crack.style.transition = "opacity 0.1s linear"

        document.body.appendChild(crack)
    }

    function updateCrack() {
        if (!crack || startTime === null) return
        const elapsed = Date.now() - startTime
        const progress = Math.min(elapsed / mineTime, 1)
        crack.style.opacity = String(1 - progress)

        if (progress < 1) {
            spawnDebris(target, false)
            requestAnimationFrame(updateCrack)
        }
    }

    function removePick() {
        if (pick) {
            clearInterval(pick._int)
            pick.remove()
            pick = null
        }
    }

    function removeCrack() {
        if (crack) {
            crack.remove()
            crack = null
        }
    }

    document.addEventListener("mousedown", e => {
        target = e.target
        spawnPick(e.clientX, e.clientY)
        spawnCrack(target)
        startTime = Date.now()
        updateCrack()

        holdTimer = setTimeout(() => {
            spawnDebris(target, true)
            if (target) target.remove()
            removePick()
            removeCrack()
            target = null
            startTime = null
        }, mineTime)
    })

    document.addEventListener("mouseup", () => {
        clearTimeout(holdTimer)
        removePick()
        removeCrack()
        target = null
        startTime = null
    })
})()