#!/bin/bash
set -x # debug mode

# Create a temporary file to store the report
TEMP_FILE=$(mktemp)

# Write report header
echo "macOS Fast Disk Usage Analysis" >> "$TEMP_FILE"
echo "Generated on $(date)" >> "$TEMP_FILE"
echo "Finding where your 256GB is actually going..." >> "$TEMP_FILE"
echo "=============================================" >> "$TEMP_FILE"
echo >> "$TEMP_FILE"

# Overall disk usage
echo "OVERALL DISK USAGE:" >> "$TEMP_FILE"
df -h / >> "$TEMP_FILE"
echo >> "$TEMP_FILE"

# Quick size check of major directories (no sudo needed)
echo "MAJOR DIRECTORY SIZES (accessible without sudo):" >> "$TEMP_FILE"
echo "Applications: $(du -sh /Applications 2>/dev/null | cut -f1)" >> "$TEMP_FILE"
echo "Users: $(du -sh /Users 2>/dev/null | cut -f1)" >> "$TEMP_FILE"
echo "Your Home: $(du -sh "$HOME" 2>/dev/null | cut -f1)" >> "$TEMP_FILE"
echo >> "$TEMP_FILE"

# User directories breakdown
echo "YOUR HOME DIRECTORY BREAKDOWN:" >> "$TEMP_FILE"
du -sh "$HOME"/* 2>/dev/null | sort -hr >> "$TEMP_FILE"
echo >> "$TEMP_FILE"

# User Library breakdown (often huge)
echo "YOUR LIBRARY DIRECTORY - often contains huge files:" >> "$TEMP_FILE"
du -sh "$HOME/Library"/* 2>/dev/null | sort -hr | head -n 15 >> "$TEMP_FILE"
echo >> "$TEMP_FILE"

# Application sizes
echo "INSTALLED APPLICATIONS - largest first:" >> "$TEMP_FILE"
du -sh /Applications/* 2>/dev/null | sort -hr | head -n 15 >> "$TEMP_FILE"
echo >> "$TEMP_FILE"

# Time Machine local snapshots (major space hog)
echo "TIME MACHINE LOCAL SNAPSHOTS - can be huge:" >> "$TEMP_FILE"
snapshots=$(tmutil listlocalsnapshots / 2>/dev/null | wc -l | tr -d ' ')
echo "Number of local snapshots: $snapshots" >> "$TEMP_FILE"
if [ "$snapshots" -gt 0 ]; then
  echo "Recent snapshots:" >> "$TEMP_FILE"
  tmutil listlocalsnapshots / 2>/dev/null | head -n 5 >> "$TEMP_FILE"
fi
echo >> "$TEMP_FILE"

# Large files in user area
echo "LARGEST FILES IN YOUR HOME - over 500MB:" >> "$TEMP_FILE"
find "$HOME" -type f -size +500M 2>/dev/null | head -n 10 | xargs ls -lh 2>/dev/null | awk '{print $5 "\t" $9}' >> "$TEMP_FILE"
echo >> "$TEMP_FILE"

# Common space hogs
echo "COMMON SPACE HOGS:" >> "$TEMP_FILE"
echo "Downloads folder: $(du -sh "$HOME/Downloads" 2>/dev/null | cut -f1)" >> "$TEMP_FILE"
echo "Desktop: $(du -sh "$HOME/Desktop" 2>/dev/null | cut -f1)" >> "$TEMP_FILE"
echo "Documents: $(du -sh "$HOME/Documents" 2>/dev/null | cut -f1)" >> "$TEMP_FILE"
echo "Movies: $(du -sh "$HOME/Movies" 2>/dev/null | cut -f1)" >> "$TEMP_FILE"
echo "Pictures: $(du -sh "$HOME/Pictures" 2>/dev/null | cut -f1)" >> "$TEMP_FILE"
echo "Music: $(du -sh "$HOME/Music" 2>/dev/null | cut -f1)" >> "$TEMP_FILE"
echo >> "$TEMP_FILE"

# Development files that can be safely removed
echo "DEVELOPMENT FILES - safe to remove, will rebuild:" >> "$TEMP_FILE"
echo "node_modules directories:" >> "$TEMP_FILE"
find "$HOME" -name "node_modules" -type d 2>/dev/null | xargs du -sh 2>/dev/null | sort -hr | head -n 10 >> "$TEMP_FILE"
echo >> "$TEMP_FILE"

# Xcode files
echo "XCODE FILES - safe to delete, will regenerate:" >> "$TEMP_FILE"
if [ -d "$HOME/Library/Developer/Xcode/DerivedData" ]; then
  echo "Xcode DerivedData: $(du -sh "$HOME/Library/Developer/Xcode/DerivedData" | cut -f1)" >> "$TEMP_FILE"
fi
if [ -d "$HOME/Library/Developer/CoreSimulator" ]; then
  echo "iOS Simulators: $(du -sh "$HOME/Library/Developer/CoreSimulator" | cut -f1)" >> "$TEMP_FILE"
fi
echo >> "$TEMP_FILE"

# Caches
echo "CACHE DIRECTORIES - safe to clear:" >> "$TEMP_FILE"
du -sh "$HOME/Library/Caches"/* 2>/dev/null | sort -hr | head -n 10 >> "$TEMP_FILE"
echo >> "$TEMP_FILE"

# System info
echo "SYSTEM SPACE ESTIMATE:" >> "$TEMP_FILE"
echo "To get exact system usage, run: sudo du -sh /System /Library /private 2>/dev/null" >> "$TEMP_FILE"
echo >> "$TEMP_FILE"

# Post the report to Hastebin
RESPONSE=$(curl -s -X POST -d "$(cat "$TEMP_FILE")" "https://haste.nixc.us/documents")

# Extract the key from the Hastebin response
KEY=$(echo "$RESPONSE" | grep -o '"key":"[^"]*"' | cut -d'"' -f4)

if [ -n "$KEY" ]; then
  echo "Fast disk usage report uploaded to Hastebin!"
  echo "See where your 256GB is going: https://haste.nixc.us/$KEY"
else
  echo "Error: Failed to upload report to Hastebin."
  echo "Local disk usage report:"
  cat "$TEMP_FILE"
fi

# Clean up the temporary file
rm -f "$TEMP_FILE"