#include "draw.h"
#include <SDL2/SDL.h>

static SDL_Window *sdlWindow = nullptr;
static SDL_Renderer *sdlRenderer = nullptr;
static SDL_Texture *sdlTexture = nullptr;

static uint8_t pal[16][3] = {
    {0, 0, 0},
    {29, 43, 83},
    {126, 37, 83},
    {0, 135, 81},
    {171, 82, 54},
    {95, 87, 79},
    {194, 195, 199},
    {255, 241, 232},
    {255, 0, 77},
    {255, 163, 0},
    {255, 236, 39},
    {0, 228, 54},
    {41, 173, 255},
    {131, 118, 156},
    {255, 119, 168},
    {255, 204, 170}
};

void draw_init() {
    sdlWindow = SDL_CreateWindow("Chirping", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, SDL_WINDOW_SHOWN);
    sdlRenderer = SDL_CreateRenderer(sdlWindow, -1, 0);
    SDL_RenderSetLogicalSize(sdlRenderer, 320, 240);
    SDL_Surface *sdlSurface = SDL_LoadBMP("font.bmp");
    //sdlSurface->pixels[0] = 1;
    sdlSurface->format->palette->colors[0].a = 0;
    sdlTexture = SDL_CreateTextureFromSurface(sdlRenderer, sdlSurface);
    SDL_SetTextureBlendMode(sdlTexture, SDL_BLENDMODE_BLEND);
}

void draw_quit() {
    SDL_DestroyTexture(sdlTexture);
    SDL_DestroyRenderer(sdlRenderer);
    SDL_DestroyWindow(sdlWindow);
}

void draw_clear(const uint8_t color) {
    SDL_SetRenderDrawColor(sdlRenderer, pal[color][0], pal[color][1], pal[color][2], 255);
    SDL_RenderClear(sdlRenderer);
}

void draw_present() {
    SDL_RenderPresent(sdlRenderer);
}

void draw_fill(const int x, const int y, const int w, const int h, const uint8_t color) {
    SDL_SetRenderDrawColor(sdlRenderer, pal[color][0], pal[color][1], pal[color][2], 255);
    SDL_Rect rect {x, y, w, h};
    SDL_RenderFillRect(sdlRenderer, &rect);
}

void draw_rect(const int x, const int y, const int w, const int h, const uint8_t color) {
    SDL_SetRenderDrawColor(sdlRenderer, pal[color][0], pal[color][1], pal[color][2], 255);
    SDL_Rect rect {x, y, w, h};
    SDL_RenderDrawRect(sdlRenderer, &rect);
}

void draw_inset(const int x, const int y, const int w, const int h, const uint8_t color1, const uint8_t color2) {
    SDL_SetRenderDrawColor(sdlRenderer, pal[color1][0], pal[color1][1], pal[color1][2], 255);
    SDL_RenderDrawLine(sdlRenderer, x+1, y+h-1, x+w-1, y+h-1);
    SDL_RenderDrawLine(sdlRenderer, x+w-1, y+1, x+w-1, y+h-1);
    SDL_SetRenderDrawColor(sdlRenderer, pal[color2][0], pal[color2][1], pal[color2][2], 255);
    SDL_RenderDrawLine(sdlRenderer, x, y, x, y+h-2);
    SDL_RenderDrawLine(sdlRenderer, x, y, x+w-2, y);
}

void draw_outset(const int x, const int y, const int w, const int h, const uint8_t color1, const uint8_t color2) {
    SDL_SetRenderDrawColor(sdlRenderer, pal[color1][0], pal[color1][1], pal[color1][2], 255);
    SDL_RenderDrawLine(sdlRenderer, x, y, x, y+h-2);
    SDL_RenderDrawLine(sdlRenderer, x, y, x+w-2, y);
    SDL_SetRenderDrawColor(sdlRenderer, pal[color2][0], pal[color2][1], pal[color2][2], 255);
    SDL_RenderDrawLine(sdlRenderer, x+1, y+h-1, x+w-1, y+h-1);
    SDL_RenderDrawLine(sdlRenderer, x+w-1, y+1, x+w-1, y+h-1);
}

void draw_line(const int x1, const int y1, const int x2, const int y2, const uint8_t color) {
    SDL_SetRenderDrawColor(sdlRenderer, pal[color][0], pal[color][1], pal[color][2], 255);
    SDL_RenderDrawLine(sdlRenderer, x1, y1, x2, y2);
}

void draw_dotted(const int x1, const int y, const int x2, const uint8_t color) {
    SDL_SetRenderDrawColor(sdlRenderer, pal[color][0], pal[color][1], pal[color][2], 255);
    for (int x=x1; x<=x2;x+=2) SDL_RenderDrawPoint(sdlRenderer, x, y);
}

void draw_char(const char chr, const int x, const int y, const uint8_t color) {
    SDL_SetTextureColorMod(sdlTexture, pal[color][0], pal[color][1], pal[color][2]);
    SDL_Rect src {((chr-32)%16)*4, ((chr-32)/16)*5, 4, 5};
    SDL_Rect dst {x, y, 4, 5};
    SDL_RenderCopy(sdlRenderer, sdlTexture, &src, &dst);
}

void draw_string(const char* str, int x, const int y, const uint8_t color) {
    const int l = strlen(str);
    for (int i = 0; i < l; ++i) {
        draw_char(str[i], x, y, color);
        x += 5;
    }
}