#include "gui.h"
#include "nokia.h"
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>

static void gui_thread(void *arg);

TaskHandle_t hGuiThread = NULL;

void gui_init() {
    printf("GUI init\n");
    LCD_setup();

    LCD_clearDisplay(0);
    LCD_setStr("Hello World", 0, 0, 1);
    LCD_updateDisplay();

    int rv = xTaskCreate(gui_thread, "gui", 4096, NULL, 3, &hGuiThread);
    assert (rv == pdPASS);
}

static void __attribute__((noreturn)) gui_thread(void *arg) {
    uint32_t pos = 20;
#define NMAX 60
    while (1) {
        uint32_t value;
        xTaskNotifyWait(0, ULONG_MAX, &value, portMAX_DELAY);
        printf("Knob event 0x%02x  ", value);

        switch (value) {
            case 0b100:
                printf("PUSH |");
                break;

            case 0b010:
                printf("BACK |");
                if (pos == 0) {
                    pos = NMAX;
                } else {
                    pos--;
                }
                break;

            case 0b001:
                printf("FWD  |");
                if (pos == NMAX) {
                    pos = 0;
                } else {
                    pos += 1;
                }
                break;
        }

        for (int i=0; i<pos; i++) {
            printf(" ");
        }
        printf("#\n");
    }
}