#include "z80analyze.h"
#include "z80.h"
#include <SDL2/SDL.h>
#include "ui_window.h"

namespace z80analyze
{
    SDL_Window *win = nullptr;
    SDL_Renderer *ren = nullptr;
    SDL_Texture *tex = nullptr;

    void refreshTitle();

    bool handleEvent(SDL_Event *e)
    {
        if (e->type == SDL_MOUSEBUTTONUP)
        {
            z80::clearMemTouched();
            refresh();
        }
        if (e->type == SDL_MOUSEMOTION)
        {
            refreshTitle();
        }
        return true;
    }

    void show()
    {
        if (!win)
        {
            win = SDL_CreateWindow("Z80 Analyzer", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 512, 512, SDL_WINDOW_SHOWN);
            ren = SDL_CreateRenderer(win, -1, 0);
            tex = SDL_CreateTexture(ren, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, 256, 256);
            ui::window::registerWindow(SDL_GetWindowID(win), handleEvent);
        }
        refresh();
    }

    char tmp[10];
    void refreshTitle()
    {
        int mx, my;
        SDL_GetMouseState(&mx, &my);
        mx/=2; my/=2;
        SDL_SetWindowTitle(win, SDL_itoa(mx+my*256, tmp, 16));
    }
    void refresh()
    {
        if (!win) return;

        Uint32 *pixels;
        int pitch;
        SDL_LockTexture(tex, NULL, (void**)&pixels, &pitch);
        for (int i=0; i<65536; ++i)
        {
            uint8_t tag = z80::getMemTouched(i);
            pixels[i] = tag==MEMTAG_NONE ? 0x808080 : tag==MEMTAG_DATA ? 0x0000FF : 0x00FF00;
        }
        pixels[z80::getPC()] = 0xFF0000;
        SDL_UnlockTexture(tex);
        SDL_RenderCopy(ren, tex, NULL, NULL);
        SDL_RenderPresent(ren);
        refreshTitle();
    }

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