#include <stdlib.h>
#include <string.h>
#include "voltage_face.h"
#include "watch.h"

static void _voltage_face_update_display(void) {
    char buf[14];
    float voltage = (float)watch_get_vcc_voltage() / 1000.0;
    sprintf(buf, "BA  %4.2f V", voltage);
    // printf("%s\n", buf);
    watch_display_string(buf, 0);
}

void voltage_face_setup(movement_settings_t *settings, uint8_t watch_face_index, void ** context_ptr) {
    (void) settings;
    (void) watch_face_index;
    (void) context_ptr;
}

void voltage_face_activate(movement_settings_t *settings, void *context) {
    (void) settings;
    (void) context;
    watch_enable_adc();
    // if we set the reference voltage here, watch_get_vcc_voltage won't do it over and over
    watch_set_analog_reference_voltage(ADC_REFERENCE_INTREF);
}

bool voltage_face_loop(movement_event_t event, movement_settings_t *settings, void *context) {
    (void) settings;
    (void) context;
    watch_date_time date_time;
    switch (event.event_type) {
        case EVENT_MODE_BUTTON_UP:
            movement_move_to_next_face();
            break;
        case EVENT_LIGHT_BUTTON_DOWN:
            movement_illuminate_led();
            break;
        case EVENT_ACTIVATE:
            _voltage_face_update_display();
            break;
        case EVENT_TICK:
            date_time = watch_rtc_get_date_time();
            if (date_time.unit.second % 5 == 4) {
                watch_set_indicator(WATCH_INDICATOR_SIGNAL);
            } else if (date_time.unit.second % 5 == 0) {
                _voltage_face_update_display();
                watch_clear_indicator(WATCH_INDICATOR_SIGNAL);
            }
            break;
        case EVENT_LOW_ENERGY_UPDATE:
            watch_display_string("BA  SLEEP ", 0);
            break;
        default:
            break;
    }

    return true;
}

void voltage_face_resign(movement_settings_t *settings, void *context) {
    (void) settings;
    (void) context;
    // make sure to restore the default in the end.
    watch_set_analog_reference_voltage(ADC_REFCTRL_REFSEL_INTVCC2_Val);
    watch_disable_adc();
}