#include "zx_128pageviewer.h"
#include "z80.h"
#include "z80mem.h"

void zx_128pageviewer::show()
{
    if (!win)
    {
        win = SDL_CreateWindow("ZX128 Page Viewer", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 1024, 128, SDL_WINDOW_SHOWN);
        ren = SDL_CreateRenderer(win, -1, 0);
        tex = SDL_CreateTexture(ren, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, 1024, 128);

        //ui::window::registerWindow(SDL_GetWindowID(win), handleEvent);
    }
    refresh();
}


void zx_128pageviewer::refresh()
{
        if (!win) return;

        Uint32 *pixels;
        int pitch;
        const uint8_t *tags = z80mem::get()->rawTagPtr(0);
        SDL_LockTexture(tex, NULL, (void**)&pixels, &pitch);
        for (int i=0; i<131072; ++i)
        {
            const int x = (i&0x7f) + (((i>>14)&0x07)*128);
            const int y = (i>>7)&0x7f;
            uint32_t none_color = 0x808080; //i<0x4000 ? 0x101010 : i<0x5800 ? 0x202020 : i<0x5b00 ? 0x404040 : 0x808080;
            uint8_t tag = tags[i];
            pixels[x+y*1024] = !(tag & MEMTAG_TOUCHED) ? none_color : (tag & MEMTAG_TINST) ? 0x00FF00 : (tag & MEMTAG_TREPEAT) ? 0xFF0000 : 0x0000FF;
        }
        //pixels[z80::getPC()] = 0xFFFFFF;

        SDL_UnlockTexture(tex);
        SDL_RenderCopy(ren, tex, NULL, NULL);
        SDL_RenderPresent(ren);
}

void zx_128pageviewer::hide()
{
    //ui::window::unregisterWindow(SDL_GetWindowID(win));
    SDL_DestroyTexture(tex); tex = nullptr;
    SDL_DestroyRenderer(ren); ren = nullptr;
    SDL_DestroyWindow(win); win = nullptr;
}

void zx_128pageviewer::focus()
{
    if (win) {
        SDL_RaiseWindow(win);
        refresh();
    }
}

bool zx_128pageviewer::handleEvent(SDL_Event *e)
{
    return true;
}