#!/bin/bash

# Free Photo Cache Space
# The photo volume is taking 179GB - likely a local cache

set -e

echo "=== Free Photo Cache Space ==="
echo ""
echo "Found: /System/Volumes/Data/Volumes/photo is 179GB"
echo "This is a mounted NAS share that's being cached locally."
echo ""

FREE_SPACE_BEFORE=$(df / | tail -1 | awk '{print $4}')
FREE_SPACE_GB_BEFORE=$(echo "scale=2; $FREE_SPACE_BEFORE / 1024 / 1024" | bc)
echo "Current free space: ${FREE_SPACE_GB_BEFORE}GB"
echo ""

# Check if it's the same as /Volumes/photo
echo "🔍 Checking mount points:"
MOUNT_POINT=$(mount | grep photo | awk '{print $3}')
echo "   Network mount: $MOUNT_POINT"
echo "   Cache location: /System/Volumes/Data/Volumes/photo"
echo ""

# Check sizes
CACHE_SIZE=$(sudo du -sh /System/Volumes/Data/Volumes/photo 2>/dev/null | awk '{print $1}')
MOUNT_SIZE=$(sudo du -sh "$MOUNT_POINT" 2>/dev/null | awk '{print $1}' || echo "N/A")
echo "   Cache size: $CACHE_SIZE"
echo "   Mount size: $MOUNT_SIZE"
echo ""

echo "⚠️  The 179GB in /System/Volumes/Data/Volumes/photo is likely:"
echo "   - A local cache of the network share"
echo "   - Or files that were copied locally"
echo ""

echo "🔧 Solution:"
echo ""
echo "Option 1: Unmount the network share (if not needed right now)"
echo "   diskutil unmount /Volumes/photo"
echo "   This will free the space immediately"
echo ""

echo "Option 2: Clear the cache (if it's a cache)"
echo "   ⚠️  WARNING: Make sure files are on NAS first!"
echo "   sudo rm -rf /System/Volumes/Data/Volumes/photo/*"
echo ""

echo "Option 3: Check if files are duplicated"
echo "   Compare /Volumes/photo vs /System/Volumes/Data/Volumes/photo"
echo "   If they're the same, you can safely remove the cache"
echo ""

read -p "Do you want to unmount /Volumes/photo to free space? (y/n) " -n 1 -r
echo ""
if [[ $REPLY =~ ^[Yy]$ ]]; then
    echo ""
    echo "Unmounting /Volumes/photo..."
    if diskutil unmount /Volumes/photo 2>/dev/null; then
        echo "✅ Successfully unmounted"
        echo ""
        echo "⏳ Waiting for space to be released..."
        sleep 5
        
        FREE_SPACE_AFTER=$(df / | tail -1 | awk '{print $4}')
        FREE_SPACE_GB_AFTER=$(echo "scale=2; $FREE_SPACE_AFTER / 1024 / 1024" | bc)
        FREED_GB=$(echo "scale=2; $FREE_SPACE_GB_AFTER - $FREE_SPACE_GB_BEFORE" | bc)
        
        echo ""
        echo "=== Results ==="
        echo "   Before: ${FREE_SPACE_GB_BEFORE}GB free"
        echo "   After:  ${FREE_SPACE_GB_AFTER}GB free"
        if (( $(echo "$FREED_GB > 150" | bc -l) )); then
            echo "   ✅ Freed: ${FREED_GB}GB (179GB cache released!)"
        elif (( $(echo "$FREED_GB > 0" | bc -l) )); then
            echo "   ✅ Freed: ${FREED_GB}GB"
        else
            echo "   ⚠️  Space not freed yet (may need to clear cache manually)"
        fi
    else
        echo "⚠️  Could not unmount (may be in use)"
        echo "   Try: sudo umount /Volumes/photo"
    fi
fi

echo ""