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

#include "liquid.h"
#include "graphics/drawing.h"
#include "scene_number.h"
#include "graphics/display_spec.h"

struct NumberScene {
    struct Scene base;
    struct NumberSceneOpts *opts;
};

static struct SceneEvent onInput(struct NumberScene *self, struct InputEvent event) {
    struct NumberSceneOpts *opts = self->opts;
    switch (event.kind) {
        case InputEventKind_Wheel:
            opts->value += event.wheel.delta;

            if (opts->value < opts->min) {
                opts->value = opts->min;
            }
            else if (opts->value > opts->max) {
                opts->value = opts->max;
            }

            return SceneEvent_Repaint();

        case InputEventKind_Button:
            if (event.button.state) {
                return SceneEvent_Close(opts->value, NULL);
            }
            // fall through
        default:
            return SceneEvent_None();
    }
}

static void paint(struct NumberScene *self)
{
    struct NumberSceneOpts *opts = self->opts;

    LCD_clearDisplay(0);
    LCD_setStrEx(opts->label, LCD_WIDTH/2, 1, BLACK, (struct TextStyle) {.size = FONT_BOLD, .align=ALIGN_CENTER});

    char buf[10];
    snprintf(buf, 10, "%d%s", opts->value, opts->unit);
    LCD_setStrEx(buf, LCD_WIDTH/2, 14, BLACK, (struct TextStyle) {.size = FONT_DOUBLE, .align=ALIGN_CENTER});
}

static void deinit(struct NumberScene *self)
{
    free(self->opts);
    self->opts = NULL;
}

struct Scene *NewScene_Number(struct NumberSceneOpts *opts) {
    struct NumberScene *scene = calloc(1, sizeof(struct NumberScene));
    if (!scene) return NULL;

    scene->opts = opts;
    scene->base.onInput = (Scene_onInput_t) onInput;
    scene->base.paint = (Scene_paint_t) paint;
    scene->base.deinit = (Scene_deinit_t) deinit;
    return (struct Scene *) scene;
}