#!/usr/bin/env bash

# Kills tmux sessions that are past the threshold to free up resources.
#
# Adapted from https://gist.github.com/dhulihan/4c65e868851660fb0d8bfa2d059e7967

set -e
set -o nounset
set -o pipefail

SCRIPTS=${SCRIPTS:-$HOME/.local/scripts}
THIS_FILE=${BASH_SOURCE[0]}
LOG_LABEL=$(basename "$THIS_FILE")
THIS=${THIS:-$LOG_LABEL}
LOG_FILE=${LOG_FILE:-"$LOG_LABEL.log"}

# Threshold
TOO_OLD_THRESHOLD=7200 # 2 hours
NOW=$(date +%s)

# Logging utility function, use in place of echo.
log() {
  logging log --source "$THIS_FILE" "$@"
}

################################################################################
# MAIN
################################################################################

# Setup logging file and label.
source "$SCRIPTS/hypr/logging"
setup-logging "$LOG_FILE" "$LOG_LABEL"

tmux ls -F '#{session_name}:#{session_activity}' | while read -r line; do
  session_name=${line%:*}
  last_activity=${line#*:}
  elapsed=$((NOW - last_activity))

  if [[ "$elapsed" -gt "$TOO_OLD_THRESHOLD" ]]; then
    log "$session_name is ${elapsed}s inactive, killing..."
    tmux kill-session -t "$session_name"
  fi
done