#include "Font.hpp"
#include "internal.hpp"
#include "vkvm.hpp"
#include <thread>
#include <iostream>

int cursorPosX = 0;
int cursorPosY = 0;
bool showCursor = false;

/**
 * @author: Julian Hinxlage
 * @since: v0.0.0
 * @brief: An image is loaded and used as a font.
 */

void threadHandler(Font &font){
    static bool cursorState{false};

    int start = 0;
    int end = font.height();
    auto bc = vkvm::getBackgroundColor();
    auto fc = vkvm::getForegroundColor();

    while(true){
        if(showCursor) {
            int x = cursorPosX - 1;
            if (x < 0) {
                x = 0;
            }

            for (int i = start; i < end; i++) {
                if (cursorState) {
                    vkvm::setPixel(x, cursorPosY + i, bc);
                } else {
                    vkvm::setPixel(x, cursorPosY + i, fc);
                }
            }
            vkvm::callEvent(vkvm::EventType::Redraw);
            cursorState = !cursorState;
        }
        std::this_thread::sleep_for(std::chrono::milliseconds(800));
    }
}

int main() {
    vkvm::initialize(0);
    vkvm::setLogLevel(vkvm::DEBUG);

    Font font(std::string() + "../res/font" + std::to_string(vkvm::getFont()) + ".bmp", std::string() + "../res/font" + std::to_string(vkvm::getFont()) + ".toml");
    std::thread thread(std::bind(threadHandler, font));

    vkvm::registerEvent(vkvm::EventType::RenderText, [&font]() {
        std::string currentText = vkvm::getText();
        int perRow = vkvm::getWidth() / font.width();
        auto bc = vkvm::getBackgroundColor();
        auto fc = vkvm::getForegroundColor();

        //clear area
        for(int y = 0; y < vkvm::getHeight();y++){
            for(int x = 0; x < vkvm::getWidth();x++) {
                vkvm::setPixel(x,y,bc);
            }
        }

        showCursor = false;
        int x = 0;
        int y = 0;
        for(char c : currentText){
            if(c == '\n'){
                y++;
                x = 0;
            }else if(c == -127){
                cursorPosX = x * font.width();
                cursorPosY = y * font.height();
                showCursor = true;
            }
            else{
                if(x == perRow){
                    y++;
                    x = 0;
                }

                for(int i = 0; i < font.height();i++){
                    for(int j = 0; j < font.width();j++){
                        if(font.getPixel(c, j, i)){
                            vkvm::setPixel(x * font.width() + j, y * font.height() + i, fc);
                        }else{
                            vkvm::setPixel(x * font.width() + j, y * font.height() + i, bc);
                        }
                    }
                }
                x++;
            }
        }

        vkvm::callEvent(vkvm::EventType::Redraw);
    });

    vkvm::registerEvent(vkvm::EventType::UpdateControlRegisters, [&font]() {
        font.load(std::string() + "../res/font" + std::to_string(vkvm::getFont()) + ".bmp", std::string() + "../res/font" + std::to_string(vkvm::getFont()) + ".toml");
    });

    while (true) {
        std::this_thread::sleep_for(std::chrono::milliseconds(100));
    }
    return 0;
}