#!/bin/bash

# Check if input file is provided
if [ $# -ne 1 ]; then
    echo "Usage: $0 <input_file>"
    exit 1
fi

input_file="$1"

# Check if input file exists
if [ ! -f "$input_file" ]; then
    echo "Error: File '$input_file' not found"
    exit 1
fi

changes_made=0

# Process each line
while IFS=':' read -r file_path line_err status desc data; do
    # Trim whitespace from all parts (both leading and trailing)
    file_path=$(echo "$file_path" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')
    line_err=$(echo "$line_err" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')
    status=$(echo "$status" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')
    desc=$(echo "$desc" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')
    data=$(echo "$data" | sed 's/^[[:space:]]*//;s/[[:space:]]*$//')

    echo "DEBUG: Processing line:"
    echo "DEBUG: file_path=[$file_path]"
    echo "DEBUG: line_err=[$line_err]"
    echo "DEBUG: status=[$status]"
    echo "DEBUG: desc=[$desc]"
    echo "DEBUG: data=[$data]"

    # Check if file exists and description matches conditions
    if [ -f "$file_path" ]; then
        echo "DEBUG: File exists: $file_path"
        
        if [ "$desc" = "undefined label" ]; then
            echo "DEBUG: Found 'undefined label' case"
            # Replace \, /, or _ with - in data
            new_data=$(echo "$data" | tr '\\/_' '-')
            echo "DEBUG: Changing '$data' to '$new_data'"
            # Replace the old data with new data in the file
            if sed -i "s|$data|$new_data|g" "$file_path"; then
                changes_made=$((changes_made + 1))
                echo "Processed: $file_path - Changed '$data' to '$new_data'"
            else
                echo "WARNING: Failed to modify $file_path"
            fi

        elif [[ "$desc" =~ "toctree contains reference to nonexisting document" ]]; then
            echo "DEBUG: Found 'toctree' case"
            # Extract the document reference from data (assuming it's in single quotes)
            doc_ref=$(echo "$data" | grep -o "'[^']*'" | tr -d "'")
            if [ -n "$doc_ref" ]; then
                # Replace \, /, or _ with - in doc_ref
                new_data=$(echo "$doc_ref" | tr '\\/_' '-')
                echo "DEBUG: Changing '$doc_ref' to '$new_data'"
                # Replace the old data with new data in the file
                if sed -i "s|$doc_ref|$new_data|g" "$file_path"; then
                    changes_made=$((changes_made + 1))
                    echo "Processed: $file_path - Changed '$doc_ref' to '$new_data'"
                else
                    echo "WARNING: Failed to modify $file_path"
                fi
            else
                echo "WARNING: Could not extract document reference from '$data' in $file_path"
            fi
        else
            echo "DEBUG: Description '$desc' doesn't match any conditions"
        fi
    else
        echo "WARNING: File not found: $file_path"
    fi
    echo "DEBUG: ---"

done < "$input_file"

echo "Processing completed!"
echo "Total changes made: $changes_made"