#include "app.h"

int graphInit(Graph *g, App *app) {

  LOGDBG("graph: init");

  const uint16_t F = 65535; // full

  const uint16_t H = 32768; // half

  const uint16_t Q = 16384; // quart

  const uint16_t colorsRgb[GS_COUNT*2][3] = { // background, foreground

    { 0, 0, Q }, { 0, 0, Q },   // window

    { 0, 0, H }, { 0, 0, H },   // inactive button

    { 0, 0, F }, { 0, 0, F },   // active button

    { 0, 0, H }, { F, F, 0 },   // inactive text

    { 0, 0, F }, { F, F, 0 } }; // active text

  // create palette

  g->app = app;

  g->cm = xcb_generate_id(g->app->xcb);

  xcb_create_colormap(g->app->xcb, XCB_COLORMAP_ALLOC_NONE, g->cm, g->app->win, g->app->screen->root_visual);

  // encqueue colors allocarion requests

  xcb_alloc_color_cookie_t cookies[GS_COUNT*2];

  for(int i = 0; i < GS_COUNT*2; ++i)

    cookies[i] = xcb_alloc_color(g->app->xcb, g->cm, colorsRgb[i][0], colorsRgb[i][1], colorsRgb[i][2]);

  // take color allocation replies (take color indices)

  uint32_t colors[GS_COUNT*2];

  for(int i = 0; i < GS_COUNT*2; ++i) {

    xcb_alloc_color_reply_t *reply = xcb_alloc_color_reply(g->app->xcb, cookies[i], NULL);

    colors[i] = reply->pixel;

    free(reply);

  }

  // associate palette with the window

  xcb_change_window_attributes(g->app->xcb, g->app->win, XCB_CW_COLORMAP, &g->cm);

  // create contexts

  uint32_t mask = XCB_GC_FOREGROUND | XCB_GC_BACKGROUND | XCB_GC_GRAPHICS_EXPOSURES;

  uint32_t values[3] = {0, 0, 0};

  for(int i = 0; i < GS_COUNT; ++i) {

    values[0] = colors[i*2 + 1]; // foreground

    values[1] = colors[i*2];     // background

    g->gc[i] = xcb_generate_id(g->app->xcb);

    xcb_create_gc(g->app->xcb, g->gc[i], g->app->win, mask, values);

  }

  return 1;

}

void graphDeinit(Graph *g) {

  LOGDBG("graph: deinit");

  for(int i = 0; i < GS_COUNT; ++i)

    xcb_free_gc(g->app->xcb, g->gc[i]);

  xcb_change_window_attributes(g->app->xcb, g->app->win, XCB_CW_COLORMAP, &g->app->screen->default_colormap);

  xcb_free_colormap(g->app->xcb, g->cm);

}

void graphResize(Graph *g)

  { }

void graphDrawBackgound(Graph *g, int x, int y, int w, int h) {

  xcb_rectangle_t r = {x, y, w, h};

  xcb_poly_fill_rectangle(g->app->xcb, g->app->win, g->gc[GS_WINDOW], 1, &r);

}

void graphDrawButton(Graph *g, int x, int y, int w, int h, int active) {

  GraphStyle s = active ? GS_BUTTON_ACTIVE : GS_BUTTON_INACTIVE;

  xcb_rectangle_t r = {x, y, w, h};

  xcb_poly_fill_rectangle(g->app->xcb, g->app->win, g->gc[s], 1, &r);

}

int textLayoutInit(TextLayout *tl, Graph *g, int cx, int cy, const char *text) {

  tl->g = g;

  tl->text = text;

  return 1;

}

void textLayoutDeinit(TextLayout *tl)

  { }

void textLayoutDraw(TextLayout *tl, int active)

  { }