/**
 * A row opens from anywhere on it.
 *
 * A row is `data-md-list-row` (or the older, unprefixed `data-list-row`, while a component that
 * has not yet moved off it still renders it) — an `<x-list-item>`, an `<x-card>`, a table row —
 * and exactly one control inside it is its opener, `data-md-list-open` (or `data-list-open`): the
 * title button that opens a sheet, or the link that goes to the item's page. A click anywhere else
 * on the row is handed to the opener, so the whole row is the target while the opener stays a real
 * control — the tab stop, the name a screen reader reads, and the owner of the `wire:click` or the
 * `href`. The row's other controls keep their own clicks. How a row looks while that happens is
 * resources/css/components/card.css and list.css.
 *
 * Not a stretched link (`::after { inset: 0 }`): Safari makes no containing block of a <tr>, so in
 * a table every overlay would cover the whole table; and not one <button> around the row, which
 * could hold no other buttons. The listeners sit on `document` and are added once.
 *
 * A row that is also `data-md-list-actionable` (or `data-list-actionable`) is M3's **directly
 * actionable card** (`<x-card actionable>`): the card is the one tab stop, so Enter and Space on
 * the card reach the opener, and the card's other actions follow it in the tab order with their
 * own keys. The opener itself carries `tabindex="-1"`, which the card's caller writes.
 */

/** Anything that answers a click itself — the row's own controls, and the opener. */
const CONTROLS = 'a, button, input, select, textarea, label, summary, [contenteditable]'

/** A row, under either its current or its older hook. */
const ROW = '[data-md-list-row], [data-list-row]'

/** A row's opener, under either its current or its older hook. */
const OPENER = '[data-md-list-open], [data-list-open]'

/** A directly actionable row, under either its current or its older hook. */
const ACTIONABLE = '[data-md-list-actionable], [data-list-actionable]'

/** How far a pointer may travel between press and release and still be a click. */
const DRAG_PX = 6

/**
 * Where the last press went down, so a click that was really a drag — a pan across a map inside
 * a card — is not taken for a click. Cleared by the click it belongs to, so a click with no press
 * behind it (a script's `.click()`) is never a drag.
 */
let pressedAt = null

/**
 * The opener a click on a row should reach, or null when the click is not the
 * row's to hand on: it landed on a control, outside any row, or it ends a text
 * selection somebody was making.
 */
const openerFor = (event) => {
    if (event.defaultPrevented || !(event.target instanceof Element)) {
        return null
    }

    if (event.target.closest(CONTROLS)) {
        return null
    }

    const opener = event.target.closest(ROW)?.querySelector(OPENER)

    if (!opener) {
        return null
    }

    if (!(window.getSelection()?.isCollapsed ?? true)) {
        return null
    }

    return opener
}

/** A link opens in a new tab the way it would have under the same click. */
const openInNewTab = (opener) => {
    if (opener instanceof HTMLAnchorElement && opener.href) {
        window.open(opener.href, '_blank', 'noopener')
    }
}

document.addEventListener('pointerdown', (event) => {
    pressedAt = event.isPrimary ? { x: event.clientX, y: event.clientY } : null
}, { capture: true, passive: true })

document.addEventListener('click', (event) => {
    const from = pressedAt
    pressedAt = null

    if (event.button !== 0) {
        return
    }

    const opener = openerFor(event)

    if (!opener) {
        return
    }

    if (from && Math.hypot(event.clientX - from.x, event.clientY - from.y) > DRAG_PX) {
        return
    }

    // Cmd, Ctrl or Shift on a row that goes somewhere is a new tab, as on the link
    // itself. On a row that opens a drawer it is nothing: a drawer has no address.
    if (event.metaKey || event.ctrlKey || event.shiftKey) {
        openInNewTab(opener)

        return
    }

    if (event.altKey) {
        return
    }

    // A script's click, which Livewire honours on both halves: `wire:click` runs,
    // and a `wire:navigate` link navigates in place rather than reloading the page.
    opener.click()
})

// A directly actionable card is a control, so it answers Enter and Space the way a
// button does — by reaching the opener, which owns the href or the wire:click.
document.addEventListener('keydown', (event) => {
    if (event.key !== 'Enter' && event.key !== ' ') {
        return
    }

    if (event.defaultPrevented || !(event.target instanceof Element) || !event.target.matches(ACTIONABLE)) {
        return
    }

    const opener = event.target.querySelector(OPENER)

    if (!opener) {
        return
    }

    event.preventDefault()
    opener.click()
})

// The middle button is not a `click`, and on a row that goes somewhere it means
// what it means on a link.
document.addEventListener('auxclick', (event) => {
    if (event.button !== 1) {
        return
    }

    const opener = openerFor(event)

    if (opener) {
        openInNewTab(opener)
    }
})

// iOS Safari paints `:active` on an element that is not a link or a button only
// when some touch listener exists, and a row is neither — without this the press
// layer in list.css never shows on an iPhone.
document.addEventListener('touchstart', () => {}, { passive: true })