//
// Created by wrede on 19.04.16.
//

#include "FileIO.h"

namespace util
{
    void FileIO::ReadCSV(
            const std::string &filename,
            const char &delimiter,
            core::Vector3d &values)
    {
        std::ifstream in(filename, std::ifstream::in);
        std::string line;

        // Read lines while the reader is in good condition
        while (in.good() && !in.eof())
        {
            getline(in, line);

            // Ignore empty lines
            if (line.size() == 0) continue;

            // Get frame index
            size_t dIndex = line.find(delimiter);
            size_t frameIndex = std::stoul(line.substr(0, dIndex).c_str()) - 1;

            // Extract point values
            std::vector<double> pointValues;
            while (dIndex != std::string::npos)
            {
                line = line.substr(dIndex + 1);
                dIndex = line.find(delimiter);
                pointValues.push_back(std::stof(line.substr(0, dIndex).c_str()));
            }

            // Add point data to detection data
            if (frameIndex >= values.size())
            {
                values.push_back(std::vector<std::vector<double>>());
            }

            values[frameIndex].push_back(pointValues);
        }

        in.close();
    }

    void FileIO::ReadCSV(
            const std::string &filename,
            const char &delimiter,
            core::Vector2d &values)
    {
        std::ifstream in(filename, std::ifstream::in);
        std::string line;

        // Read lines while the reader is in good condition and the
        // end of file is not reached
        while (in.good() && !in.eof())
        {
            getline(in, line);

            // Ignore empty lines
            if (line.size() == 0) continue;

            // Extract point values
            size_t dIndex;
            std::vector<double> pointValues;
            do
            {
                dIndex = line.find(delimiter);

                pointValues.push_back(
                        std::stof(line.substr(0, dIndex).c_str()));

                line = line.substr(dIndex + 1);
            }
            while (dIndex != std::string::npos);

            // Add point data to detection data
            values.push_back(pointValues);
        }

        in.close();
    }
}