#!/usr/bin/env bash
set -euo pipefail
bat="$(upower -e | grep -m1 BAT || true)"
if [ -z "$bat" ]; then
  echo '{"text":" --","class":"no-battery","tooltip":"No battery found"}'
  exit 0
fi
info="$(upower -i "$bat")"
full=$(echo "$info" | awk -F: '/energy-full:/{gsub(/[^0-9.]/,"",$2); print $2; exit}')
design=$(echo "$info" | awk -F: '/energy-full-design:/{gsub(/[^0-9.]/,"",$2); print $2; exit}')
if [ -z "$full" ] || [ -z "$design" ] || [ "$design" = "0" ]; then
  # Try charge-full fallback
  full=$(echo "$info" | awk -F: '/charge-full:/{gsub(/[^0-9.]/,"",$2); print $2; exit}')
  design=$(echo "$info" | awk -F: '/charge-full-design:/{gsub(/[^0-9.]/,"",$2); print $2; exit}')
fi
wear="--"
if [ -n "$full" ] && [ -n "$design" ] && [ "$design" != "0" ]; then
  health=$(awk -v f="$full" -v d="$design" 'BEGIN{printf "%.0f", (f/d)*100}')
  wear=$(( 100 - health ))
  text="❤ ${health}%"
else
  text="❤ --"
fi
cycles=$(echo "$info" | awk -F: '/cycle count:/{gsub(/[^0-9]/,"",$2); print $2; exit}')
vendor=$(echo "$info" | awk -F: '/vendor:/{gsub(/^ +/,"",$2); print $2; exit}')
model=$(echo "$info" | awk -F: '/model:/{gsub(/^ +/,"",$2); print $2; exit}')
tt="Battery health info\nWear: ${wear}%\nCycles: ${cycles:---}\nVendor: ${vendor:---}\nModel: ${model:---}"
printf '{"text":"%s","class":"battery-health","tooltip":"%s"}\n' "$text" "$(echo "$tt" | sed ':a;N;$!ba;s/\n/\\n/g')"