#!/bin/bash

# Move Small Files Test - Start with smallest files first

set -e

echo "=== Move Small Files Test ==="
echo ""

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

# Check NAS is mounted
if [ ! -d "$NAS_PATH" ]; then
    echo "⚠️  NAS not mounted at: $NAS_PATH"
    echo "   Please check your mount point"
    exit 1
fi

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

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

echo "🔍 Finding smallest folders/files to move first..."
echo ""

# Get list sorted by size (smallest first)
du -h -d 1 "$DOCS_PATH" 2>/dev/null | sort -h | while read size item; do
    # Skip the total line
    if [ "$item" = "$DOCS_PATH" ]; then
        continue
    fi
    
    FOLDER_NAME=$(basename "$item")
    
    # Skip if it's not a directory
    if [ ! -d "$item" ]; then
        continue
    fi
    
    # Show what we found
    echo "Found: $FOLDER_NAME ($size)"
done

echo ""
echo "📦 Moving smallest items first (under 1GB)..."
echo ""

MOVED_COUNT=0

# Move items under 1GB first
du -h -d 1 "$DOCS_PATH" 2>/dev/null | sort -h | while read size item; do
    # Skip the total line
    if [ "$item" = "$DOCS_PATH" ]; then
        continue
    fi
    
    # Skip if not a directory
    if [ ! -d "$item" ]; then
        continue
    fi
    
    FOLDER_NAME=$(basename "$item")
    
    # Check if size is under 1GB (look for M or K, not G)
    if echo "$size" | grep -qE "[0-9]+[MK]"; then
        echo "Moving: $FOLDER_NAME ($size)..."
        
        if mv -v "$item" "$NAS_PATH/Documents/" 2>&1 | tail -3; then
            echo "   ✅ Successfully moved"
            MOVED_COUNT=$((MOVED_COUNT + 1))
            
            # Show progress
            REMAINING=$(du -sh "$DOCS_PATH" 2>/dev/null | awk '{print $1}')
            MOVED=$(du -sh "$NAS_PATH/Documents" 2>/dev/null | awk '{print $1}')
            FREE_NOW=$(df / | tail -1 | awk '{print $4}')
            FREE_NOW_GB=$(echo "scale=2; $FREE_NOW / 1024 / 1024" | bc)
            
            echo "   Progress: $MOVED on NAS, $REMAINING remaining"
            echo "   Free space: ${FREE_NOW_GB}GB"
            echo ""
            
            # Ask to continue after a few moves
            if [ $MOVED_COUNT -ge 3 ]; then
                read -p "   Continue with more small files? (y/n) " -n 1 -r
                echo ""
                if [[ ! $REPLY =~ ^[Yy]$ ]]; then
                    echo "   Stopped. Run again to continue."
                    break
                fi
                MOVED_COUNT=0
            fi
        else
            echo "   ⚠️  Error moving $FOLDER_NAME"
            echo "   Continuing with next..."
        fi
        echo ""
    fi
done

echo ""
echo "📊 Summary:"
REMAINING=$(du -sh "$DOCS_PATH" 2>/dev/null | awk '{print $1}')
MOVED=$(du -sh "$NAS_PATH/Documents" 2>/dev/null | awk '{print $1}')
FREE_NOW=$(df / | tail -1 | awk '{print $4}')
FREE_NOW_GB=$(echo "scale=2; $FREE_NOW / 1024 / 1024" | bc)

echo "   Moved to NAS: $MOVED"
echo "   Remaining: $REMAINING"
echo "   Free space now: ${FREE_NOW_GB}GB"
echo ""

if [ "$REMAINING" != "0B" ] && [ -n "$REMAINING" ]; then
    echo "✅ Test successful! You can now:"
    echo "   1. Run this script again to move more small files"
    echo "   2. Or move larger files manually"
    echo "   3. Or use: ./safe_move_documents.sh for automated chunked moves"
fi

echo ""