/**
 * commafeed-tweaks.js
 *
 * Client-side behavior tweaks for CommaFeed (Athou/commafeed), applied from
 * outside the app bundle.
 *
 * Install (either):
 *   1. Paste this file's contents into Settings -> Custom code -> Custom JS.
 *      CommaFeed serves it as `custom_js.js` and loads it after the app starts.
 *   2. Serve this file alongside the app and add
 *        <script src="commafeed-tweaks.js"></script>
 *      to index.html.
 *
 * All listeners attach to `window`, so load timing relative to React doesn't matter.
 */
(function () {
    'use strict'

    if (window.__commafeedTweaksInstalled) return
    window.__commafeedTweaksInstalled = true

    const log = (...args) => console.debug('[commafeed-tweaks]', ...args)

    /**
     * Disable swipe-right-to-open the mobile sidebar.
     *
     * Upstream (pages/app/Layout.tsx) wraps the AppShell in a react-swipeable Box
     * whose touch listeners live on that element and open the menu on a rightward
     * swipe. We catch touchmove on window in the capture phase and stop propagation
     * of rightward-horizontal moves so they never reach that element. No
     * preventDefault, so native scrolling is untouched; leftward swipes still pass
     * through, so swipe-left-to-close keeps working.
     */
    function disableSwipeToOpenMenu() {
        let startX = 0
        let startY = 0

        window.addEventListener('touchstart', e => {
            const t = e.touches[0]
            if (!t) return
            startX = t.clientX
            startY = t.clientY
        }, { capture: true, passive: true })

        window.addEventListener('touchmove', e => {
            const t = e.touches[0]
            if (!t) return
            const dx = t.clientX - startX
            const dy = t.clientY - startY
            if (dx > 0 && Math.abs(dx) > Math.abs(dy)) {
                e.stopPropagation()
            }
        }, { capture: true, passive: true })

        log('swipe-to-open menu disabled')
    }

    disableSwipeToOpenMenu()
})()