#include <iomanip>
#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <unordered_set>
#include <cctype>

using namespace std;

// (The same declarations for keywords, operators, delimiters, and utility functions)

// Classify the tokens and display them in a tabulated format
void classifyTokens(const vector<string>& tokens) {
    // Print table header
    cout << left << setw(20) << "Token"
         << setw(20) << "Type" << endl;
    cout << string(40, '-') << endl;

    for (const string& token : tokens) {
        string type;
        if (isKeyword(token)) {
            type = "Keyword";
        } else if (isOperator(token)) {
            type = "Operator";
        } else if (isNumber(token)) {
            type = "Number";
        } else if (token.size() >= 2 && token[0] == '"' && token.back() == '"') {
            type = "String Literal";
        } else if (token.size() >= 2 && token[0] == '\'' && token.back() == '\'') {
            type = "Character Literal";
        } else if (isDelimiter(token[0])) {
            type = "Delimiter";
        } else if (token[0] == '_' || isalpha(token[0])) {
            type = "Identifier";
        } else {
            type = "Unrecognized";
        }

        // Print token and its type
        cout << left << setw(20) << token
             << setw(20) << type << endl;
    }
}

int main() {
    string filePath;
    cout << "Enter the path to the C source file: ";
    getline(cin, filePath);

    ifstream file(filePath);
    if (!file.is_open()) {
        cerr << "Error: Could not open file at " << filePath << endl;
        return 1;
    }

    string code((istreambuf_iterator<char>(file)), istreambuf_iterator<char>());
    file.close();

    // Remove comments from the code
    string cleanedCode = removeComments(code);

    // Tokenize the cleaned code
    vector<string> tokens = tokenize(cleanedCode);

    // Classify and display tokens in tabulated format
    cout << "\nIdentified Tokens:\n";
    classifyTokens(tokens);

    return 0;
}