#!/bin/bash

# Safe Move Documents - Move in smaller chunks to avoid getting stuck

set -e

echo "=== Safe Move Documents ==="
echo ""
echo "Moving large folders can get stuck. This script moves in smaller chunks."
echo ""

NAS_PATH="/Volumes/Download/temp documents from MAc"
DOCS_PATH="$HOME/Documents"

# Check if NAS is mounted
if [ ! -d "$NAS_PATH" ]; then
    echo "⚠️  NAS path not found: $NAS_PATH"
    echo ""
    echo "Please check your NAS mount point:"
    ls -la /Volumes/ | grep -i "download\|ds224"
    exit 1
fi

echo "📊 Current Status:"
DOCS_SIZE=$(du -sh "$DOCS_PATH" 2>/dev/null | awk '{print $1}')
echo "   Documents size: $DOCS_SIZE"
echo ""

# Check what's already moved
if [ -d "$NAS_PATH/Documents" ]; then
    MOVED_SIZE=$(du -sh "$NAS_PATH/Documents" 2>/dev/null | awk '{print $1}')
    echo "   Already on NAS: $MOVED_SIZE"
    echo ""
    echo "   ⚠️  Documents folder already exists on NAS!"
    echo "   The previous move may have partially completed."
    echo ""
    read -p "   Continue moving remaining files? (y/n) " -n 1 -r
    echo ""
    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
        exit 0
    fi
fi

echo "🔍 Analyzing Documents folder..."
echo "   Finding largest subfolders to move first..."
du -h -d 1 "$DOCS_PATH" 2>/dev/null | sort -hr | head -10
echo ""

echo "📦 Strategy: Move in smaller chunks"
echo ""
echo "This will:"
echo "  1. Move largest subfolders one at a time"
echo "  2. Show progress after each move"
echo "  3. Allow you to stop if needed"
echo ""

read -p "Proceed with chunked move? (y/n) " -n 1 -r
echo ""
if [[ ! $REPLY =~ ^[Yy]$ ]]; then
    exit 0
fi

# Create destination
mkdir -p "$NAS_PATH/Documents"

echo ""
echo "🚚 Moving in chunks..."
echo ""

# Get list of subfolders, sorted by size
du -h -d 1 "$DOCS_PATH" 2>/dev/null | sort -hr | while read size folder; do
    # Skip the total line
    if [ "$folder" = "$DOCS_PATH" ]; then
        continue
    fi
    
    FOLDER_NAME=$(basename "$folder")
    
    # Skip if it's a file (not a directory)
    if [ ! -d "$folder" ]; then
        continue
    fi
    
    echo "Moving: $FOLDER_NAME ($size)..."
    
    # Move with verbose output
    if mv -v "$folder" "$NAS_PATH/Documents/" 2>&1 | head -5; then
        echo "   ✅ Moved successfully"
    else
        echo "   ⚠️  Error moving $FOLDER_NAME"
        echo "   Continuing with next folder..."
    fi
    
    echo ""
    
    # Show progress
    REMAINING=$(du -sh "$DOCS_PATH" 2>/dev/null | awk '{print $1}')
    MOVED=$(du -sh "$NAS_PATH/Documents" 2>/dev/null | awk '{print $1}')
    echo "   Progress: $MOVED moved, $REMAINING remaining"
    echo ""
    
    # Ask to continue after each large folder
    if echo "$size" | grep -qE "[0-9]+G"; then
        read -p "   Continue? (y/n) " -n 1 -r
        echo ""
        if [[ ! $REPLY =~ ^[Yy]$ ]]; then
            echo "   Stopped. You can resume later."
            break
        fi
    fi
done

echo ""
echo "📊 Final Status:"
REMAINING=$(du -sh "$DOCS_PATH" 2>/dev/null | awk '{print $1}')
MOVED=$(du -sh "$NAS_PATH/Documents" 2>/dev/null | awk '{print $1}')
echo "   Moved to NAS: $MOVED"
echo "   Remaining: $REMAINING"
echo ""

if [ "$REMAINING" != "0B" ] && [ -n "$REMAINING" ]; then
    echo "⚠️  Some files remain. You can:"
    echo "   1. Run this script again to continue"
    echo "   2. Manually move remaining files"
    echo "   3. Leave them if they're small"
fi

echo ""