#ifndef GAME_FONT_H
#define GAME_FONT_H

#include "Bitmap.h"

class Font {
public:
    Font() = default;
    ~Font() = default;

    Font(Bitmap *bitmap, unsigned w, unsigned h, unsigned minCode = 32, unsigned maxCode = 127)
    : Font() {
        load(bitmap, w, h, minCode, maxCode);
    }

    void load(Bitmap *bitmap, unsigned w, unsigned h, unsigned minCode = 32, unsigned maxCode = 127) {
        _font = bitmap;
        _w = w;
        _h = h;
        _minCode = minCode;
        _maxCode = maxCode;
        _charsPerRow = _font->GetWidth() / _w;
    }

    void renderCharAlpha(int c, int x, int y, uint8_t color, uint8_t *fb, unsigned fbWidth, unsigned fbHeight) {
        if (c < _minCode || c > _maxCode) return;
        c -= _minCode;

        auto bitmapX = (c % _charsPerRow) * _w;
        auto bitmapY = (c / _charsPerRow) * _h;

        for (auto charY = 0; charY < _h; charY++) {
            if (y + charY < 0) continue;
            if (y + charY >= fbHeight) break;
            auto yOffset = (y + charY) * fbWidth;

            for (auto charX = 0; charX < _w; charX++) {
                if (x + charX < 0) continue;
                if (x + charX >= fbWidth) break;

                auto pv = _font->GetPixel(bitmapX + charX, bitmapY + charY);
                if (pv & 0x80) continue;

                fb[yOffset + x + charX] = color;
            }
        }
    }

    void renderChar(int c, int x, int y, uint8_t fgColor, uint8_t bgColor, uint8_t *fb, unsigned fbWidth, unsigned fbHeight) {
        if (c < _minCode || c > _maxCode) return;
        c -= _minCode;

        auto bitmapX = (c % _charsPerRow) * _w;
        auto bitmapY = (c / _charsPerRow) * _h;

        for (auto charY = 0; charY < _h; charY++) {
            if (y + charY < 0) continue;
            if (y + charY >= fbHeight) break;
            auto yOffset = (y + charY) * fbWidth;

            for (auto charX = 0; charX < _w; charX++) {
                if (x + charX < 0) continue;
                if (x + charX >= fbWidth) break;

                auto pv = _font->GetPixel(bitmapX + charX, bitmapY + charY) & 0x80 ? bgColor : fgColor;
                fb[yOffset + x + charX] = pv;
            }
        }
    }
private:
    Bitmap *_font{nullptr};
    unsigned _w{0}, _h{0};
    unsigned _minCode{0};
    unsigned _maxCode{0};
    unsigned _charsPerRow{0};
};


#endif //GAME_FONT_H