#!/bin/sh

# Deletes log files older than 7 days from ~/.local/var/log
# Services (hyprland, waybar, dunst, hypridle, gammastep) create a new
# timestamped log file per session. Without cleanup these accumulate.
#
# Uses the date embedded in filenames (service-YYYY-MM-DD-HHMMSS.log)
# rather than mtime, because long-running sessions keep mtime fresh
# even on old log files.
#
# Intended to run daily via crontab.

LOG_DIR="$HOME/.local/var/log"
DAYS=7

[ -d "$LOG_DIR" ] || exit 0

cutoff=$(date -d "$DAYS days ago" +%Y%m%d)

for f in "$LOG_DIR"/*.log; do
    [ -f "$f" ] || continue
    # Extract YYYY-MM-DD from filename, or fall back to an embedded
    # _<10-digit-epoch>_ (used by hyprland-runtime logs which lack a
    # human-readable date in the filename). Skip files with neither.
    name=$(basename "$f")
    filedate=$(echo "$name" | grep -oP '\d{4}-\d{2}-\d{2}' | head -1)
    if [ -z "$filedate" ]; then
        epoch=$(echo "$name" | grep -oP '_\K[0-9]{10}(?=_)' | head -1)
        [ -n "$epoch" ] && filedate=$(date -d "@$epoch" +%Y-%m-%d 2>/dev/null)
    fi
    [ -n "$filedate" ] || continue
    # Skip files still being written to (modified in the last 24h).
    # This prevents deleting active logs from long-running sessions.
    [ -n "$(find "$f" -maxdepth 0 -mtime 0)" ] && continue
    # Compare as integers: YYYYMMDD
    filedate_num=$(echo "$filedate" | tr -d '-')
    if [ "$filedate_num" -lt "$cutoff" ]; then
        rm -f "$f"
    fi
done