#include "Bitmap.h"

#include <algorithm>
#include <cstdio>
#include <cstring>

Bitmap::~Bitmap() {
    clear();
}

Bitmap::Bitmap(const Bitmap &other) {
    copyFrom(other);
}

Bitmap & Bitmap::operator=(const Bitmap &other) {
    if (this != &other) {
        clear();
        copyFrom(other);
    }

    return *this;
}

Bitmap::Bitmap(Bitmap &&other) noexcept {
    moveFrom(std::move(other));
}

Bitmap & Bitmap::operator=(Bitmap &&other) noexcept {
    moveFrom(std::move(other));

    return *this;
}

Bitmap::Bitmap(uint16_t width, uint16_t height)
: _width(width), _height(height), _data(new uint8_t[width * height]) {
}

Bitmap::Bitmap(uint16_t width, uint16_t height, uint8_t *data) : Bitmap(width, height) {
    memcpy(_data, data, width * height);
}

void Bitmap::SetPaletteEntry(uint8_t index, Video::PaletteEntry entry) {
    _pal[index] = entry;
}

Video::PaletteEntry Bitmap::GetPaletteEntry(uint8_t index) const {
    return _pal[index];
}

void Bitmap::clear() {
    delete[] _data;
    _data = nullptr;
    _width = _height = 0;
}

void Bitmap::copyFrom(const Bitmap &other) {
    _width = other._width;
    _height = other._height;
    _data = new uint8_t[_width * _height];
    for (auto i = 0; i < 256; i++) _pal[i] = other._pal[i];

    memcpy(_data, other._data, _width * _height);
}

void Bitmap::moveFrom(Bitmap &&other) noexcept {
    // Clear existing data
    clear();

    // Copy data from other
    _data = other._data;
    _width = other._width;
    _height = other._height;
    for (auto i = 0; i < 256; i++) _pal[i] = other._pal[i];

    // Clear other
    other._data = nullptr;
    other._width = other._height = 0;
}