#!/bin/bash

echo "Analyzing GC logs for Web Lab 4"

# Find GC log files in current directory
GC_LOG_FILE=$(ls -t gc.log* 2>/dev/null | head -n1)

if [ -z "$GC_LOG_FILE" ]; then
    echo "No GC log files found"
    exit 1
fi

echo "=== GC Log Analysis Report ==="
echo "Log file: $GC_LOG_FILE"
echo "Generated at: $(date)"
echo ""

echo "=== GC Collection Counts ==="
echo "Young Generation collections:"
grep -c "Pause Young" $GC_LOG_FILE || echo "0"

echo "Mixed collections:"  
grep -c "Pause Mixed" $GC_LOG_FILE || echo "0"

echo "Full GC collections:"
grep -c "Pause Full" $GC_LOG_FILE || echo "0"

echo ""
echo "=== Timing Analysis ==="
echo "Recent pause times:"
grep -o "[0-9.]*ms" $GC_LOG_FILE | tail -10

echo ""
echo "=== Memory Analysis ==="
echo "Recent GC events:"
grep "GC(" $GC_LOG_FILE | tail -5

echo ""
echo "=== Recommendations ==="
YOUNG_GC=$(grep -c "Pause Young" $GC_LOG_FILE || echo "0")
FULL_GC=$(grep -c "Pause Full" $GC_LOG_FILE || echo "0")

if [ "$FULL_GC" -gt 0 ]; then
    echo "⚠️  Full GC detected ($FULL_GC times) - consider increasing heap size"
fi

if [ "$YOUNG_GC" -gt 50 ]; then
    echo "⚠️  High GC frequency ($YOUNG_GC young collections)"
fi

echo ""
echo "=== Current JVM Settings ==="
ps aux | grep wildfly | grep -o '\-X[^ ]*'
EOF