#!/bin/sh

photoframe_hide() {
    swaymsg 'workspace 1'
}

photoframe_show() {
    # Run on a separate workspace so Firefox can stay fullscreen, too
    swaymsg 'workspace 2'
    if [ -f /tmp/photoframe.pid ]; then
        # feh is already running
        return 0
    fi
    if [ ! -f /tmp/photoframe-current ]; then
        cp /usr/share/feh/images/feh.png /tmp/photoframe-current
    fi
    feh -FZ --draw-exif --class photoframe /tmp/photoframe-current &
    # Wait for the feh window to actually appear ...
    swaymsg -t subscribe '["window"]'
    # Sometimes, Sway's `for_window ... fullscreen` doesn't work?
    swaymsg fullscreen
    echo $! > /tmp/photoframe.pid
}

photoframe_stream() {
    while :; do
        curl -NsS https://photos.pyrocufflink.blue/stream |
            while read url; do
                curl -fsL -o /tmp/photoframe-next "${url}" || continue
                mv /tmp/photoframe-next /tmp/photoframe-current
            done
        sleep 30
    done
}

case $1 in
show)
    photoframe_show
    ;;
hide)
    photoframe_hide
    ;;
stream)
    photoframe_stream
    ;;
esac