#include "app.h"

int keyInit(Key *k, Keyboard *kbd) {

  k->kbd = kbd;

  k->down = 0;

  int lx = k->x + k->w/2;

  int ly = k->y + k->h/2;

  if (k->label && !textLayoutInit(&k->tl, &k->kbd->app->graph, lx, ly, k->label))

    return 0;

  int d = k->h/4;

  lx = k->x + k->w - d;

  ly = k->y + d;

  if (k->label2 && !textLayoutInit(&k->tl2, &k->kbd->app->graph, lx, ly, k->label2)) {

    if (k->label) textLayoutDeinit(&k->tl);

    return 0;

  }

  return 1;

}

void keyDeinit(Key *k) {

  if (k->label) textLayoutDeinit(&k->tl);

  if (k->label2) textLayoutDeinit(&k->tl2);

}

void keyDraw(Key *k, int cx, int cy, int cw, int ch) {

  if ( k->x + k->w <= cx || k->x >= cx + cw

    || k->y + k->h <= cy || k->y >= cy + ch ) return;

  graphDrawButton(&k->kbd->app->graph, k->x, k->y, k->w, k->h, k->down);

  textLayoutDraw(&k->tl, k->down);

}

void keyMouseDown(Key *k) {

  k->down = 1;

  inputEvent(&k->kbd->app->input, k->keySym, 1);

  appInvalidateRect(k->kbd->app, k->x, k->y, k->w, k->h);

}

void keyMouseUp(Key *k) {

  k->down = 0;

  inputEvent(&k->kbd->app->input, k->keySym, 0);

  appInvalidateRect(k->kbd->app, k->x, k->y, k->w, k->h);

}

int keyboardInit(Keyboard *kbd, App *app) {

  LOGDBG("keyboard: init");

  kbd->app = app;

  kbd->downKey = NULL;

  for(int i = 0; i < kbd->keysCount; ++i)

    if (!keyInit(&kbd->keys[i], kbd)) {

      for(--i; i >= 0; --i) keyDeinit(&kbd->keys[i]);

      return 0;

    }

  return 1;

}

void keyboardDeinit(Keyboard *kbd) {

  LOGDBG("keyboard: deinit");

  keyboardMouseUp(kbd);

  for(int i = 0; i < kbd->keysCount; ++i)

    keyDeinit(&kbd->keys[i]);

}

void keyboardDraw(Keyboard *kbd, int cx, int cy, int cw, int ch) {

  for(int i = 0; i < kbd->keysCount; ++i)

    keyDraw(&kbd->keys[i], cx, cy, cw, ch);

}

void keyboardMouseDown(Keyboard *kbd, int x, int y) {

  for(int i = kbd->keysCount - 1; i >= 0; --i) {

    Key *k = &kbd->keys[i];

    if ( k->x <= x && x < k->x + k->w

      && k->y <= y && y < k->y + k->h )

    {

      if (kbd->downKey != k) {

        keyboardMouseUp(kbd);

        kbd->downKey = k;

        keyMouseDown(k);

      }

      break;

    }

  }

}

void keyboardMouseUp(Keyboard *kbd) {

  if (kbd->downKey) {

    keyMouseUp(kbd->downKey);

    kbd->downKey = NULL;

  }

}