// Tetris.cpp : This file contains the 'main' function. Program execution begins and ends there.
//

#include "pch.h"
#include <iostream>
using namespace std;

#include <Windows.h>

wstring tetromino[7];
int nFieldWidth = 12;
int nFieldHeight = 18;
unsigned char *pField = nullptr;

int nScreenWidth = 80; // Console screen size X (columns)
int nScreenHeight = 30; // Console screen size Y (rows)

// Rotation function. Takes in an x and y coordinate for inputs and r is the amount you want to rotate it by
// Returns the appropriate index for the pieces
int Rotate(int px, int py, int r)
{
    switch (r % 4)
    {
    case 0: return py * 4 + px; // 0 degree rotation
    case 1: return 12 + py - (px * 4); // 90 degree rotation
    case 2: return 15 - (py * 4) - px; // 180 degree rotation
    case 3: return 3 - py + (px * 4); // 270 degree rotation
    }
    return 0;
}

int main()
{
    // Create assets
    tetromino[0].append(L"..X.");
    tetromino[0].append(L"..X.");
    tetromino[0].append(L"..X.");
    tetromino[0].append(L"..X.");

    tetromino[1].append(L"..X.");
    tetromino[1].append(L".XX.");
    tetromino[1].append(L".X..");
    tetromino[1].append(L"....");

    tetromino[2].append(L".X..");
    tetromino[2].append(L".XX.");
    tetromino[2].append(L"..X.");
    tetromino[2].append(L"....");

    tetromino[3].append(L"....");
    tetromino[3].append(L".XX.");
    tetromino[3].append(L".XX.");
    tetromino[3].append(L"....");

    tetromino[4].append(L"..X.");
    tetromino[4].append(L".XX.");
    tetromino[4].append(L"..X.");
    tetromino[4].append(L"....");

    tetromino[5].append(L"....");
    tetromino[5].append(L".XX.");
    tetromino[5].append(L"..X.");
    tetromino[5].append(L"..X.");

    tetromino[6].append(L"....");
    tetromino[6].append(L".XX.");
    tetromino[6].append(L".X..");
    tetromino[6].append(L".X..");

    pField = new unsigned char[nFieldWidth*nFieldHeight]; // create play field
    for (int x = 0; x < nFieldWidth; x++) // Board boundary
        for (int y = 0; y < nFieldHeight; y++)
            pField[y*nFieldWidth + x] = (x == 0 || x == nFieldWidth - 1 || y == nFieldHeight - 1) ? 9 : 0;

    // Screen Buffer
    wchar_t *screen = new wchar_t[nScreenWidth*nScreenHeight];
    for (int i = 0; i < nScreenWidth*nScreenHeight; i++) screen[i] = L' ';
    HANDLE hConsole = CreateConsoleScreenBuffer(GENERIC_READ | GENERIC_WRITE, 0, NULL, CONSOLE_TEXTMODE_BUFFER, NULL);
    SetConsoleActiveScreenBuffer(hConsole);
    DWORD dwBytesWritten = 0;

    bool bGameOver = false;
    while (!bGameOver)
    {
        //Draw Field
        for (int x = 0; x < nFieldWidth; x++)
            for (int y = 0; y < nFieldHeight; y++)
                screen[(y + 2)*nScreenWidth + (x + 2)] = L" ABCDEFG=#"[pField[y*nFieldWidth + x]];
        // Display frame
        WriteConsoleOutputCharacter(hConsole, screen, nScreenWidth * nScreenHeight, { 0,0 }, &dwBytesWritten);

    }


    return 0;
}