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#include "Graphics.hh"

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Graphics::Graphics (Engine &engine, GameState &state) :

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    engine(engine), 

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    state(state), 

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    update_timer(GRAPHICS_UPDATE_INTERVAL_MS),

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    win(GRAPHICS_WINDOW_TITLE, MAP_DIM_W, MAP_DIM_H), 

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    keyboard(win.get_ic()->get_keyboard()) {

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    // connect timer signal

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    slots.connect(update_timer.sig_timer(), this, &Graphics::on_update);

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    // enable

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    update_timer.enable();

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}

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void Graphics::check_input (void) {

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    LocalPlayer *player;

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    int dx = 0, dy = 0;

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    // stop on escape

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    if (keyboard.get_keycode(CL_KEY_ESCAPE)) {

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            engine.stop();

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            return;

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    }

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    // ignore if we don't have a local player

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    if ((player = state.getLocalPlayer()) == NULL)

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        return;

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    // handle up/down/left/right

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    if (keyboard.get_keycode(CL_KEY_UP))

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            dy -= 3;

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    if (keyboard.get_keycode(CL_KEY_DOWN))

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            dy += 3;

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    if (keyboard.get_keycode(CL_KEY_LEFT))

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            dx -= 3;

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    if (keyboard.get_keycode(CL_KEY_RIGHT))

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            dx += 3;

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    // apply movement if applicable

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    if (dx || dy)

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        player->move(PositionDelta(dx, dy));

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}

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void Graphics::do_redraw (void) {

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    CL_GraphicContext *gc = win.get_gc();

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    // white background

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    gc->clear(CL_Color::white);

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    // draw players

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    for (std::list<Player*>::iterator it = state.player_list.begin(); it != state.player_list.end(); it++) {

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        Player *p = *it;

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        // draw square

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        gc->fill_rect(

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            CL_Rect(

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                p->getPosition().x - 5, p->getPosition().y - 5,

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                p->getPosition().x + 5, p->getPosition().y + 5

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            ), CL_Color::black

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        );

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    }

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    // flip window buffer, LIEK NAO

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    win.flip(0);

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}

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void Graphics::on_update (void) {

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    // check keyboard input

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    check_input();

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    // redraw display

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    do_redraw();

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}