#include "FileSave.h"
#include <iostream>
#include <fstream>
#include <sstream>
#include <windows.h>
#include <io.h>
#include <direct.h>
#include <string>
using namespace std;

int createDirectory(std::string path)
{
    int len = path.length();
    char tmpDirPath[256] = {0};
    for (int i = 0; i < len; i++)
    {
        tmpDirPath[i] = path[i];
        if (tmpDirPath[i] == '\\' || tmpDirPath[i] == '/')
        {
            if (_access(tmpDirPath, 0) == -1)
            {
                int ret = _mkdir(tmpDirPath);
                if (ret == -1)
                    return ret;
            }
        }
    }
    return 0;
}

int get_last_num_from_log(char *log_name)
{
    ifstream inFile;
    inFile.open(log_name, ios::in);
    if (inFile.good())
    {
        inFile.seekg(-1, ios_base::end); // go to one spot before the EOF

        bool keepLooping = true;
        while (keepLooping)
        {
            char ch;
            inFile.get(ch); // Get current byte's data

            if ((int)inFile.tellg() <= 1)
            {                        // If the data was at or before the 0th byte
                inFile.seekg(0);     // The first line is the last line
                keepLooping = false; // So stop there
            }
            else if (ch == '\n')
            {                        // If the data was a newline
                keepLooping = false; // Stop at the current position.
            }
            else
            {                                    // If the data was neither a newline nor at the 0 byte
                inFile.seekg(-2, ios_base::cur); // Move to the front of that data, then to the front of the data before it
            }
        }
        string lastLine;
        getline(inFile, lastLine); // Read the current line

        inFile.close();
        return atoi(&lastLine[0]);
    }
    else
    {
        inFile.close();
        return 0;
    }
}
void attach_new_log(char *log_name, int new_num)
{

    ofstream outFile;
    outFile.open(log_name, ios::app);
    if (outFile.is_open())
    {
        SYSTEMTIME sys;
        GetLocalTime(&sys);
        outFile << endl
                << new_num << " " << sys.wYear << " " << sys.wMonth << " " << sys.wDay << " " << sys.wHour << " " << sys.wMinute << " " << sys.wSecond;
        outFile.close();
    }
}
void FileSave::construct_new_record(int new_num)
{
    string record_name = "./data_serial/Record" + to_string(new_num);
    record_name += ".txt";
    cout << "record_name is " << record_name << endl;
    record_file.open(record_name.c_str(), ios::out);
}

FileSave::FileSave()
{
    cout << "FileSave" << endl;
    char log_name[] = "./data_serial/log.txt";
    createDirectory("./data_serial/");
    last_num = get_last_num_from_log(log_name);
    new_num = last_num + 1;
    attach_new_log(log_name, new_num);
    construct_new_record(new_num);
}
void FileSave::save_three_num(float a, float b, float c)
{
    if (record_file.is_open())
    {
        record_file << a << " " << b << " " << c << " " << endl;
    }
    else
    {
        cout << "record_file error" << endl;
    }
}
FileSave::~FileSave()
{
    if (record_file.is_open())
    {
        record_file.close();
    }
}