#include "progress.hpp"
#include <iostream>
#include <stdio.h>

#ifdef _WIN32

#include <conio.h>
#include <windows.h>
#include <winuser.h>

#define cout std::wcout
using string = std::wstring;

#else // UNIX

#include <sys/ioctl.h>

#define cout std::cout
#define TEXT( a ) a
using string = std::string;

#endif // UNIX

#ifdef WIN32
size_t getTermWidth() {
    CONSOLE_SCREEN_BUFFER_INFO csbi;

    GetConsoleScreenBufferInfo( GetStdHandle( STD_OUTPUT_HANDLE ), &csbi );
    return csbi.srWindow.Right - csbi.srWindow.Left + 1;
}
#else
size_t getTermWidth() {
    struct winsize w;
    ioctl( 0, TIOCGWINSZ, &w );

    return w.ws_col;
}
#endif

#ifdef WIN32
void home( size_t /*UNUSED*/ ) {
    static HANDLE h = NULL;
    while ( !h )
        h = GetStdHandle( STD_OUTPUT_HANDLE );
    CONSOLE_SCREEN_BUFFER_INFO info;
    GetConsoleScreenBufferInfo( h, &info );
    COORD c = { 0, info.dwCursorPosition.Y - 1 };
    SetConsoleCursorPosition( h, c );
}
#else
void home( size_t width ) {
    cout << "\x1b[" << width << "D";
}
#endif

size_t getNum( size_t width, int perc ) {
    return ( width * perc ) / 100;
}

void ProgressBar::print( int perc ) {
    auto width = getTermWidth();
    home( width );
    auto count = getNum( width - 7, perc );
    cout << "[" << string( count, TEXT( '=' ) ).c_str();
    if ( perc != 100 ) {
        int wc = width - 8 - count;
        if ( wc < 0 )
            wc = 0;
        cout << ">" << string( wc, TEXT( ' ' ) ).c_str();
    }
    cout << "] ";
    if ( perc / 10 == 0 )
        cout << "  ";
    else if ( perc / 100 == 0 )
        cout << " ";
    cout << perc << "%" << std::flush;
}