Fix historical analyzer: division by zero + empty report output

Bug Reports from User:
1. "line 162: count * 100 / total: division by 0"
2. Empty report - no IP details displayed, only headers

Root Causes:

Issue 1: Division by Zero (line 162)
- show_progress() called with total="unknown"
- Attempted: count * 100 / "unknown" → division error
- Happened when processing logs of unknown size

Issue 2: Empty Report Output
- ALL echo statements used >> "$OUTPUT_FILE" inside { } block
- The { } > "$OUTPUT_FILE" already redirects EVERYTHING to file
- Using >> INSIDE redirected block caused output to go nowhere
- Result: Only headers written, no IP data

Example of broken code (lines 280-390):
{
    echo "Header"  # Goes to file ✅
    echo "Data" >> "$OUTPUT_FILE"  # ❌ WRONG! Tries to append while already redirected
} > "$OUTPUT_FILE"

Fixes Applied:

1. show_progress() function (lines 159-168):
   Before:
     percent=$((count * 100 / total))  # Crashes if total="unknown"

   After:
     if [ "$total" = "unknown" ] || [ "$total" -eq 0 ]; then
         echo "Processing: $count lines..."  # No percentage
     else
         percent=$((count * 100 / total))   # Safe
     fi

2. Removed ALL >> "$OUTPUT_FILE" inside output block:
   - Used sed to remove 32 instances
   - Now all echo statements write to stdout
   - The { } > "$OUTPUT_FILE" captures everything correctly

Testing:
Before:
  - Division by zero error ❌
  - Empty report (no IP details) ❌

After:
  - No division errors ✅
  - Full report with IP details ✅
  - Syntax validated ✅

Impact:
- Report now displays complete IP analysis
- Shows attack types, sample URLs, reputation
- No more math errors during processing

tools/analyze-historical-attacks.sh

@@ -159,8 +159,12 @@ declare -A IP_SAMPLE_URLS     # Sample URLs per IP
 show_progress() {
     count=$1
     total=$2
+    if [ "$total" = "unknown" ] || [ "$total" -eq 0 ] 2>/dev/null; then
+        echo -ne "\r${BLUE}[*]${NC} Processing: $count lines... "
+    else
         percent=$((count * 100 / total))
         echo -ne "\r${BLUE}[*]${NC} Processing: $count/$total lines ($percent%) "
+    fi
 }
 
 # Start analysis
@@ -273,16 +277,16 @@ uri="${temp#*||}"
             fi
         done < <($CAT_CMD "$log_file" 2>/dev/null)
 
-        echo "  → Found $file_attacks attacks" >> "$OUTPUT_FILE"
+        echo "  → Found $file_attacks attacks"
     done
 
-    echo "" >> "$OUTPUT_FILE"
+    echo ""
     echo "================================================================================
-" >> "$OUTPUT_FILE"
+"
-    echo "ATTACKING IPs - DETAILED BREAKDOWN" >> "$OUTPUT_FILE"
+    echo "ATTACKING IPs - DETAILED BREAKDOWN"
     echo "================================================================================
-" >> "$OUTPUT_FILE"
+"
-    echo "" >> "$OUTPUT_FILE"
+    echo ""
 
     # Sort IPs by cumulative threat score and display
     # Create sorted list first to avoid subshell issues
@@ -327,9 +331,9 @@ uri="${temp#*||}"
         fi
 
         # Print IP summary
-        echo "[$ip_count] $ip" >> "$OUTPUT_FILE"
+        echo "[$ip_count] $ip"
-        printf "    Attacks: %d | Avg Score: %d | Threat Level: %s\n" "$attack_count" "$avg_score" "$level" >> "$OUTPUT_FILE"
+        printf "    Attacks: %d | Avg Score: %d | Threat Level: %s\n" "$attack_count" "$avg_score" "$level"
-        echo "    Attack Types: $attack_summary" >> "$OUTPUT_FILE"
+        echo "    Attack Types: $attack_summary"
 
         # Get reputation (if available)
         if type get_threat_intelligence &>/dev/null; then
@@ -337,53 +341,53 @@ uri="${temp#*||}"
             if [ -n "$threat_intel" ]; then
                 IFS='|' read -r abuse_conf abuse_rpts country isp geo timing whitelisted <<< "$threat_intel"
                 if [ "${abuse_conf:-0}" -gt 0 ]; then
-                    printf "    Reputation: AbuseIPDB %d%% confidence (%d reports) | %s\n" "${abuse_conf:-0}" "${abuse_rpts:-0}" "${country:-Unknown}" >> "$OUTPUT_FILE"
+                    printf "    Reputation: AbuseIPDB %d%% confidence (%d reports) | %s\n" "${abuse_conf:-0}" "${abuse_rpts:-0}" "${country:-Unknown}"
                 fi
             fi
         fi
 
         # Show sample URLs
         if [ -n "$sample_urls" ]; then
-            echo "    Sample Targets:" >> "$OUTPUT_FILE"
+            echo "    Sample Targets:"
             IFS='||' read -ra urls <<< "$sample_urls"
             for url in "${urls[@]}"; do
-                echo "      - $url" >> "$OUTPUT_FILE"
+                echo "      - $url"
             done
         fi
 
-        echo "" >> "$OUTPUT_FILE"
+        echo ""
     done <<< "$sorted_ips"
 
     echo "================================================================================
-" >> "$OUTPUT_FILE"
+"
-    echo "SUMMARY STATISTICS" >> "$OUTPUT_FILE"
+    echo "SUMMARY STATISTICS"
     echo "================================================================================
-" >> "$OUTPUT_FILE"
+"
-    echo "" >> "$OUTPUT_FILE"
+    echo ""
-    echo "Total lines processed: $TOTAL_LINES" >> "$OUTPUT_FILE"
+    echo "Total lines processed: $TOTAL_LINES"
-    echo "Total attacks detected: $TOTAL_ATTACKS" >> "$OUTPUT_FILE"
+    echo "Total attacks detected: $TOTAL_ATTACKS"
-    echo "Unique attacking IPs: ${#TOP_ATTACKERS[@]}" >> "$OUTPUT_FILE"
+    echo "Unique attacking IPs: ${#TOP_ATTACKERS[@]}"
-    echo "" >> "$OUTPUT_FILE"
+    echo ""
-    echo "Attack Severity:" >> "$OUTPUT_FILE"
+    echo "Attack Severity:"
-    echo "  - Critical (≥85): $CRITICAL_ATTACKS" >> "$OUTPUT_FILE"
+    echo "  - Critical (≥85): $CRITICAL_ATTACKS"
-    echo "  - High (70-84): $HIGH_ATTACKS" >> "$OUTPUT_FILE"
+    echo "  - High (70-84): $HIGH_ATTACKS"
-    echo "  - Medium (50-69): $MEDIUM_ATTACKS" >> "$OUTPUT_FILE"
+    echo "  - Medium (50-69): $MEDIUM_ATTACKS"
-    echo "" >> "$OUTPUT_FILE"
+    echo ""
 
     # Top Attack Types
-    echo "Top Attack Types:" >> "$OUTPUT_FILE"
+    echo "Top Attack Types:"
     for type in "${!ATTACK_TYPES[@]}"; do
         echo "$type:${ATTACK_TYPES[$type]}"
     done | sort -t: -k2 -nr | head -10 | while IFS=: read -r type count; do
-        printf "  %-20s %5d attacks\n" "$type" "$count" >> "$OUTPUT_FILE"
+        printf "  %-20s %5d attacks\n" "$type" "$count"
     done
-    echo "" >> "$OUTPUT_FILE"
+    echo ""
 
     echo "================================================================================
-" >> "$OUTPUT_FILE"
+"
-    echo "END OF REPORT" >> "$OUTPUT_FILE"
+    echo "END OF REPORT"
     echo "================================================================================
-" >> "$OUTPUT_FILE"
+"
 
 } > "$OUTPUT_FILE"