#!/bin/bash
# =============================================================================
# Frigate Media Cleanup
# Removes recordings, clips, and snapshots older than 90 days from NAS
# Run via cron: 0 3 * * 0 /mnt/docker-data/scripts/cleanup-frigate-media.sh
# =============================================================================

MEDIA_DIR="/mnt/docker-data/media/frigate"
MAX_AGE_DAYS=90
LOG_FILE="/var/log/frigate-cleanup.log"
DRY_RUN=false

if [ "$1" = "--dry-run" ]; then
    DRY_RUN=true
fi

log() {
    echo "$(date '+%Y-%m-%d %H:%M:%S') $1" | tee -a "$LOG_FILE"
}

if [ ! -d "$MEDIA_DIR" ]; then
    log "ERROR: $MEDIA_DIR does not exist"
    exit 1
fi

log "=== Frigate media cleanup started (max age: ${MAX_AGE_DAYS} days, dry_run: ${DRY_RUN}) ==="

# Get size before cleanup
SIZE_BEFORE=$(du -sh "$MEDIA_DIR" 2>/dev/null | cut -f1)
log "Size before: $SIZE_BEFORE"

# Find and remove old files in recordings/, clips/, exports/
for subdir in recordings clips exports; do
    DIR="$MEDIA_DIR/$subdir"
    if [ -d "$DIR" ]; then
        COUNT=$(find "$DIR" -type f -mtime +${MAX_AGE_DAYS} | wc -l)
        log "Found $COUNT files older than ${MAX_AGE_DAYS} days in $subdir/"
        if [ "$DRY_RUN" = true ]; then
            find "$DIR" -type f -mtime +${MAX_AGE_DAYS} -print | head -20
            log "(dry run - no files deleted)"
        else
            find "$DIR" -type f -mtime +${MAX_AGE_DAYS} -delete
            # Remove empty directories left behind
            find "$DIR" -type d -empty -delete 2>/dev/null
            log "Cleaned $subdir/"
        fi
    fi
done

# Get size after cleanup
SIZE_AFTER=$(du -sh "$MEDIA_DIR" 2>/dev/null | cut -f1)
log "Size after: $SIZE_AFTER"
log "=== Cleanup complete ==="