#!/bin/bash

# Find Real Space Usage
# The snapshot is a ghost - find what's actually using space

set -e

echo "=== Find Real Space Usage ==="
echo ""
echo "Your container is 99.8% full (493.4GB used, 995MB free)"
echo "The snapshot is a ghost entry (0GB)."
echo "Let's find what's ACTUALLY using the space..."
echo ""

echo "📊 Container Breakdown:"
echo "   Container Total: 494.4GB"
echo "   Container Used: 493.4GB (99.8%)"
echo "   Container Free: 995MB"
echo ""

echo "🔍 Large Directories in /System/Volumes/Data:"
sudo du -h -d 1 /System/Volumes/Data 2>/dev/null | sort -hr | head -10 | awk '{printf "   %8s  %s\n", $1, $2}'
echo ""

# Check the suspicious Volumes directory
VOLUMES_SIZE=$(sudo du -sh /System/Volumes/Data/Volumes 2>/dev/null | awk '{print $1}')
echo "⚠️  CRITICAL FINDING:"
echo "   /System/Volumes/Data/Volumes: $VOLUMES_SIZE"
echo ""
echo "   This directory is HUGE and likely contains:"
echo "   - Old Time Machine backup volumes"
echo "   - Mounted disk images"
echo "   - Stale mount points"
echo ""

echo "🔍 Checking what's in /System/Volumes/Data/Volumes:"
ls -la /System/Volumes/Data/Volumes/ 2>/dev/null | head -20 | sed 's/^/   /'
echo ""

# Check for old backup volumes
echo "📦 Checking for old Time Machine backup volumes:"
BACKUP_VOLS=$(ls -d "/System/Volumes/Data/Volumes/Backups of"* 2>/dev/null || echo "")
if [ -n "$BACKUP_VOLS" ]; then
    echo "   Found old backup volumes:"
    echo "$BACKUP_VOLS" | while read vol; do
        SIZE=$(sudo du -sh "$vol" 2>/dev/null | awk '{print $1}')
        echo "     - $vol ($SIZE)"
    done
    echo ""
    echo "   ⚠️  These are likely old Time Machine backups taking up space!"
else
    echo "   No obvious backup volumes found"
fi
echo ""

# Check home directory
echo "📁 Your Home Directory:"
du -h -d 1 ~ 2>/dev/null | sort -hr | head -10 | awk '{printf "   %8s  %s\n", $1, $2}'
echo ""

# Summary
echo "=== Summary ==="
echo ""
echo "The snapshot is NOT the problem (it's a ghost, 0GB)."
echo ""
echo "The REAL problem:"
echo "   - Container is 99.8% full"
echo "   - /System/Volumes/Data/Volumes is $VOLUMES_SIZE (likely old backups)"
echo "   - Your home: 130GB"
echo ""
echo "To free space, you need to:"
echo "   1. Check what's in /System/Volumes/Data/Volumes"
echo "   2. Remove old backup volumes if found"
echo "   3. Clean up your home directory:"
echo "      - Downloads: 8.7GB"
echo "      - Documents: 40GB"
echo "      - Library: 33GB"
echo ""