#include <gb/gb.h>
#include <gb/metasprites.h>
#include <stdio.h>
#include "Tetromino.c"
#include "Common.c"
#include "BG.c"

void HandleInput(){

    joypadPrev = joypadCurr;
    joypadCurr = joypad();

    // detect initial input command and set inputState for Monroe
    if ((joypadCurr & J_DOWN) && inputState == 0){
        inputState = 1;
    }

    switch (inputState){
        // for Monroe
        case 1:
            if (joypadCurr & J_RIGHT){
                inputState = 2;
            }
            if ((joypadCurr & J_LEFT) || (joypadCurr & J_UP) || (joypadCurr & J_A) || (joypadCurr & J_B)){
                inputState = 0;
            }
            break;
        case 2:
            if (joypadCurr & J_B){
                ShowArtWork();
            }
            if ((joypadCurr & J_LEFT) || (joypadCurr & J_UP) || (joypadCurr & J_A) || (joypadCurr & J_DOWN)){
                inputState = 0;
            }
            break;
        case 0:
            break;
    }
}

void main(void)
{
    isGameEnable = FALSE;
    artworkStatus = FALSE;

    SetupBackground();
    ShowStartScreen();

    // Main Loop
    while (1){
        if (isGameEnable == TRUE){
            // If the tetromino is default, then try to spawn a new tetromino
            if(currentTetromino==255){
                // Get a new tetromino
                uint8_t canSpawnTetromino = PickNewTetromino();
                // If you can't spawn a new tetromino, then back to start screen
                if(!canSpawnTetromino){
                    isGameEnable = FALSE;
                    ShowStartScreen();
                }
            }

            fallTimer++;

            if (fallTimer >= fallSpeed){
                // If the piece cannot move down
                if(!CanPieceBePlacedHere(currentTetromino,currentTetrominoRot,currentX,currentY+1)){
                    // set current tetromino to BG
                    SetTetriminoToBG();
                    // Blink if any lines are completed
                    BlinkRows();
                    // shift rows down if any lines are completed
                    MoveBGTilesDown();
                    // Hide the current tetromino sprite
                    hide_metasprite(Tetrominos_metasprites[currentTetromino*4+currentTetrominoRot],0);
                    // Reset the current tetromino
                    currentTetromino=255;
                // if the tetromino can move down
                }else{
                    // Move tetromino down
                    currentY++;
                    // reset fall timer
                    fallTimer = 0;
                }
            }

            if(currentTetromino!=255){
                // Handle user input
                HandleInput();
                // Show the current tetromino at the selected position
                move_metasprite(Tetrominos_metasprites[currentTetromino*4+currentTetrominoRot],tileOffsets[currentTetromino],0,currentX*8,currentY*8);
            }

            wait_vbl_done();
        }
    }
}