/**
 * @file dbc_parser.cpp
 * @brief
 *
 * Created: 2026-03-13
 * Author: Deeaitch (Dim. Himro)
 *
 * Licensed under the MIT License.
 * See LICENSE file in the project root for full license text.
 */

#include "dbc_parser.h"
#include "dbc_statement_handler.h"

#include <cctype>
#include <fstream>
#include <stdexcept>

namespace {
    /**
   * @brief Remove leading and trailing spaces.
   * @param text Input text.
   * @return Trimmed text.
   */
    std::string TrimText(const std::string &text) {
        std::string::size_type begin = 0U;
        while ((begin < text.size()) &&
               std::isspace(static_cast<unsigned char>(text[begin])))
            ++begin;

        std::string::size_type end = text.size();
        while ((end > begin) &&
               std::isspace(static_cast<unsigned char>(text[end - 1U])))
            --end;

        return text.substr(begin, end - begin);
    }
}// namespace

DbcDatabase DbcParser::ParseFile(const std::string &filePath) const {
    std::ifstream input(filePath.c_str());
    if (!input.is_open())
        throw std::runtime_error("Failed to open DBC file: " + filePath);

    DbcDatabase database;
    DbcParseContext context{database, nullptr};
    const DbcStatementDispatcher dispatcher;

    std::size_t lineNumber = 0U;
    std::string line;
    while (std::getline(input, line)) {
        ++lineNumber;
        line = Trim(line);
        if (line.empty())
            continue;

        try {
            dispatcher.Dispatch(line, context);
        } catch (const std::exception &error) {
            throw std::runtime_error(filePath + ":" + std::to_string(lineNumber) +
                                     ": " + error.what());
        }
    }

    return database;
}

std::string DbcParser::Trim(const std::string &text) {
    return TrimText(text);
}