#include "ui.h"

namespace ui
{
    uint8_t colors[16][3] = {
        {0,0,0},
        {0,0,128},
        {0,128,0},
        {0,128,128},
        {128,0,0},
        {128,0,128},
        {255,128,0},
        {128,128,128},
        {30,30,30},
        {0,0,255},
        {0,255,0},
        {0,255,255},
        {255,0,0},
        {255,0,255},
        {255,255,0},
        {255,255,255},
    };

    SDL_Renderer *ren = nullptr;
    SDL_Texture *tex = nullptr;

    uint8_t offset_x = 0;
    uint8_t offset_y = 0;

    bool clicked = false;

    void (*dialog)(void) = nullptr;

    SDL_Texture * createtexture(SDL_Renderer *renderer)
    {
        SDL_Texture *texture = SDL_CreateTextureFromSurface(renderer, SDL_LoadBMP("font.bmp"));
        SDL_SetTextureScaleMode(texture, SDL_SCALEMODE_NEAREST);
        SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND);
        return texture;
    }

    void setrenderer(SDL_Renderer *renderer, SDL_Texture *texture)
    {
        ren = renderer;
        tex = texture;
        offset_x = offset_y = 0;
    }

    void setoffset(uint8_t x, uint8_t y)
    {
        offset_x = x;
        offset_y = y;
    }

    void incoffset(uint8_t x, uint8_t y)
    {
        offset_x += x;
        offset_y += y;
    }

    uint8_t getOffsetX()
    {
        return offset_x;
    }

    uint8_t getOffsetY()
    {
        return offset_y;
    }

    bool mouseInside(int x, int y, int w, int h)
    {
        float mxf, myf;
        SDL_GetMouseState(&mxf, &myf);
        int mx = int(mxf)/CHR_W;
        int my = int(myf)/CHR_H;
        mx -= offset_x;
        my -= offset_y;
        return (mx >= x) && (mx < x+w) && (my >= y) && (my < y+h);
    }

    void panel(int x, int y, int w, int h, const char *title)
    {
        ui::setoffset(x, y);

        ui::box(0,0,w,h,COLOR_WHITE);
        ui::printrect(2,0, strlen(title)+2,1, COLOR_DARK);
        ui::printtxt(3,0, title, COLOR_WHITE);
        
        ui::incoffset(1, 1);
    }

    void box(int x, int y, int w, int h, uint8_t color)
    {
        SDL_FRect rect {float((offset_x+x)*CHR_W)+3, float((offset_y+y)*CHR_H)+6, float(w*CHR_W-6), float(h*CHR_H-13)};
        SDL_SetRenderDrawColor(ren, colors[color][0], colors[color][1], colors[color][2], 255);
        SDL_RenderRect(ren, &rect);
    }

    void printrect(int x, int y, int w, int h, uint8_t color)
    {
        SDL_FRect rect {float(offset_x+x)*CHR_W, float(offset_y+y)*CHR_H, float(w*CHR_W), float(h*CHR_H)};
        SDL_SetRenderDrawColor(ren, colors[color][0], colors[color][1], colors[color][2], 255);
        SDL_RenderFillRect(ren, &rect);
    }

    void printvoidrect(int x, int y, int w, int h, uint8_t color)
    {
        SDL_FRect rect {float(offset_x+x)*CHR_W, float(offset_y+y)*CHR_H, float(w*CHR_W), float(h*CHR_H)};
        SDL_SetRenderDrawColor(ren, colors[color][0], colors[color][1], colors[color][2], 255);
        SDL_RenderRect(ren, &rect);
    }

    void printchar(int x, int y, char chr, uint8_t color)
    {
        if (color != 255) SDL_SetRenderDrawColor(ren, colors[color][0], colors[color][1], colors[color][2], 255);
        if (chr==32) return;
        if (chr<32 || chr>127) chr = '.';
        SDL_FRect src {float((chr-32)&0xf)*CHR_W, float((chr-32)>>4)*CHR_H, float(CHR_W), float(CHR_H)};
        SDL_FRect dst {float(offset_x+x)*CHR_W, float(offset_y+y)*CHR_H, float(CHR_W), float(CHR_H)};
        SDL_RenderTexture(ren, tex, &src, &dst);
    }

    void printtxt(int x, int y, const char *text, uint8_t color)
    {
        SDL_SetTextureColorMod(tex, colors[color][0], colors[color][1], colors[color][2]);
        for (int i=0; i<strlen(text);++i) if (text[i]!=32) printchar(x+i, y, text[i]);
    }

    void placechar(int x, int y, char chr, uint8_t color)
    {
        if (color != 255) SDL_SetRenderDrawColor(ren, colors[color][0], colors[color][1], colors[color][2], 255);
        if (chr==32) return;
        if (chr<32 || chr>127) chr = '.';
        SDL_FRect src {float((chr-32)&0xf)*CHR_W, float((chr-32)>>4)*CHR_H, float(CHR_W), float(CHR_H)};
        SDL_FRect dst {float(x), float(y), float(CHR_W*2), float(CHR_H*2)};
        SDL_RenderTexture(ren, tex, &src, &dst);
    }

    void placetxt(int x, int y, const char *text, uint8_t color)
    {
        SDL_SetTextureColorMod(tex, colors[color][0], colors[color][1], colors[color][2]);
        for (int i=0; i<strlen(text);++i) if (text[i]!=32) placechar(x+i*CHR_W*2, y, text[i]);
    }

    void setClicked(const bool value)
    {
        clicked = value;
    }

    const bool getClicked()
    {
        return clicked;
    }

    void setDialog(void(*new_dialog)(void))
    {
        ui:dialog = new_dialog;
    }

    bool hasDialog()
    {
        return dialog != nullptr;
    }

    void callDialog()
    {
        if (dialog) dialog();
    }


}