#!/bin/bash
# vi: ts=4

# Lockscreen script that will capture a screenshot, pixelate and add an overlay (all optional).
# If no toggle is enabled, the overlay image for the final image is used instead. $overlayPath with
# a black backgrond color.
# Optional features require the `imagemagick` package. 

# Constants
lockscreenDir=$(mktemp -d)
lockscreenPath=$lockscreenDir/lock.png

# Config
screenshotBin=grim
lockscreenBin=swaylock
overlayPath=~/.dotfiles/lock_overlay.png
font=Terminus
extraArguments=

# Toggles
screenshot=false
pixelate=false
overlay=false

cd $lockscreenDir

# Take screenshot
if $screenshot; then
    $screenshotBin $lockscreenPath
else
    cp $HOME/.wallpaper $lockscreenPath
fi

# Pixelate
if $pixelate; then
    convert $lockscreenPath -scale 10% -scale 1000% $lockscreenPath
fi

# Overlay
if $overlay; then
    convert "$lockscreenPath" "$overlayPath" -gravity center -composite "$lockscreenPath"
fi

if ! $screenshot && ! $pixelate && ! $overlay; then
    lockscreenPath=$overlayPath
    extraArguments="$extraArguments --scaling=center --color=#000001ff"
fi

# Lock screen
$lockscreenBin \
    -n \
    --image $lockscreenPath \
    --font=$font \
    $extraArguments