#include <malloc.h>
#include <stdio.h>

#include "scenes.h"
#include "liquid.h"
#include "analog.h"
#include "graphics/nokia.h"
#include "graphics/drawing.h"

/**
 * The struct is allocated bigger than 'Scene' to accommodate private fields.
 * Since the base struct is located at the beginning, it can be cast and passed around as Scene.
 */
struct RootScene {
    struct Scene base;
    int32_t pos;
    uint32_t timer_phase;
    uint32_t timer_prescale;
};

static struct SceneEvent Root_onInput(struct RootScene *self, struct InputEvent event) {
    switch (event.kind) {
        case InputEventKind_Wheel:
            self->pos += event.wheel.delta;
            break;

        case InputEventKind_Button:
            if (event.button.state) {
                return SceneEvent_OpenChild(NewScene_Car(), 0);
            }
            break;
    }

    return SceneEvent_Repaint();
}

static struct SceneEvent Root_onTick(struct RootScene *self) {
    self->timer_prescale += 1;

    if (self->timer_prescale == 100) {
        self->timer_prescale = 0;
        self->timer_phase += 1;
        self->timer_phase = self->timer_phase & 0b11; // 0..3

        return SceneEvent_Repaint();
    }

    return SceneEvent_None();
}

static void Root_paint(struct RootScene *self)
{
    LCD_clearDisplay(0);
    const char *header = "???";
    switch (self->timer_phase) {
        case 0:
            header = "Drink water";
            break;
        case 1:
            header = " Drink water";
            break;
        case 2:
            header = "  Drink water";
            break;
        case 3:
            header = " Drink water";
            break;
    }

    LCD_setStrEx(header, 0, 3, 1, 3);

    LCD_setRect(0, 12, 83, 31, 1, 1);
    char buf[10];
//    sprintf(buf, "%3d", priv->pos);
//    LCD_setStr(buf, 2, 15, 0);
    sprintf(buf, "🌡%.0f°C", analog_read());
    LCD_setStrEx(buf, 2, 14, 0, 2);

    LCD_setStr("×↑↓←→⏰⌛☸⏎🌡°🔙▶◀", 2, 33, 1);
    LCD_updateDisplay();
}

struct Scene *NewScene_Root(void) {
    struct RootScene *scene = calloc(1, sizeof(struct RootScene));

    scene->base.onInput = (Scene_onInput_t) Root_onInput;
    scene->base.paint = (Scene_paint_t) Root_paint;
    scene->base.onTick = (Scene_onTick_t) Root_onTick;
    return (struct Scene *) scene;
}