#!/bin/bash

# Cycles through the background images available

BACKGROUNDS_PATH="$HOME/Tower/Library/Pictures/Wallpapers/3840x2160/"
CURRENT_BACKGROUND_LINK="$HOME/.local/state/station/background"

mapfile -d '' -t BACKGROUNDS < <(find -L "$BACKGROUNDS_PATH" -maxdepth 1 -type f -print0 2>/dev/null | sort -z)
TOTAL=${#BACKGROUNDS[@]}

if (( TOTAL == 0 )); then
    notify-send "No background was found" -t 2000
    pkill -x swaybg
    setsid uwsm-app -- swaybg --color '#000000' >/dev/null 2>&1 &
else
    # Get current background from symlink
    if [[ -L $CURRENT_BACKGROUND_LINK ]]; then
        CURRENT_BACKGROUND=$(readlink "$CURRENT_BACKGROUND_LINK")
    else
        # Default to first background if no symlink exists
        CURRENT_BACKGROUND=""
    fi

    # Find current background index
    INDEX=-1
    for i in "${!BACKGROUNDS[@]}"; do
        if [[ ${BACKGROUNDS[$i]} == $CURRENT_BACKGROUND ]]; then
            INDEX=$i
            break
        fi
    done

    # Get next background (wrap around)
    if (( INDEX == -1 )); then
        # Use the first background when no match was found
        NEW_BACKGROUND="${BACKGROUNDS[0]}"
    else
        NEXT_INDEX=$(((INDEX + 1) % TOTAL))
        NEW_BACKGROUND="${BACKGROUNDS[$NEXT_INDEX]}"
    fi

    station-bg-set "$NEW_BACKGROUND"
fi