#!/bin/bash
# Aggressive unused variable prefixing script

set -e

echo "=== Phase 2: Bulk Unused Variable Prefixing ==="
echo "Collecting unused variable warnings..."

# Get all unused variable warnings
cargo check --workspace --tests 2>&1 | grep "unused variable:" > /tmp/unused_vars.txt || true

# Count total
total=$(wc -l < /tmp/unused_vars.txt)
echo "Found $total unused variable warnings"

fixed=0

# Process each warning
while IFS= read -r line; do
    # Extract file path (between --> and :line_number)
    file=$(echo "$line" | sed -n 's/.*--> \([^:]*\):.*/\1/p' | tr -d ' ')
    
    # Extract variable name (between backticks)
    var=$(echo "$line" | sed -n "s/.*variable: \`\([^']*\)'.*/\1/p")
    
    if [ -n "$file" ] && [ -n "$var" ] && [ -f "$file" ]; then
        # Skip if already prefixed
        if [[ "$var" == _* ]]; then
            continue
        fi
        
        echo "Fixing: $var in $file"
        
        # Prefix in function parameters: foo: Type -> _foo: Type
        sed -i "s/\b$var:/\_$var:/g" "$file"
        
        # Prefix in let bindings: let foo = -> let _foo =
        sed -i "s/let $var =/let _$var =/g" "$file"
        
        # Prefix in mut bindings: mut foo = -> mut _foo =
        sed -i "s/mut $var =/mut _$var =/g" "$file"
        
        # Prefix in for loops: for foo in -> for _foo in
        sed -i "s/for $var in/for _$var in/g" "$file"
        
        ((fixed++))
    fi
done < /tmp/unused_vars.txt

echo "Fixed $fixed variables"
echo "Verifying changes..."
cargo check --workspace --tests 2>&1 | grep "^warning:" | wc -l