/*
 * MTG RFID Companion - System state machine
 */

#include <string.h>
#include "freertos/FreeRTOS.h"
#include "freertos/semphr.h"
#include "app_state.h"

static SemaphoreHandle_t s_lock;
static app_state_t s_view = APP_STATE_SCANNER;
static int32_t s_life = 20;
static int32_t s_life_preset = 20;

const char *app_state_name(app_state_t state)
{
    switch (state) {
    case APP_STATE_BOOT: return "BOOT";
    case APP_STATE_SCANNER: return "SCANNER";
    case APP_STATE_CARD_VIEW: return "CARD_VIEW";
    case APP_STATE_LIFE_COUNTER: return "LIFE_COUNTER";
    case APP_STATE_REGISTRATION: return "REGISTRATION";
    }
    return "UNKNOWN";
}

static void ensure_lock(void)
{
    if (s_lock == NULL) {
        s_lock = xSemaphoreCreateMutex();
    }
}

void app_set_life(int32_t life)
{
    ensure_lock();
    xSemaphoreTake(s_lock, portMAX_DELAY);
    s_life = life;
    xSemaphoreGive(s_lock);
}

int32_t app_get_life(void)
{
    ensure_lock();
    xSemaphoreTake(s_lock, portMAX_DELAY);
    int32_t v = s_life;
    xSemaphoreGive(s_lock);
    return v;
}

void app_set_life_preset(int32_t preset)
{
    ensure_lock();
    xSemaphoreTake(s_lock, portMAX_DELAY);
    s_life_preset = preset;
    s_life = preset;
    xSemaphoreGive(s_lock);
}

int32_t app_get_life_preset(void)
{
    ensure_lock();
    xSemaphoreTake(s_lock, portMAX_DELAY);
    int32_t v = s_life_preset;
    xSemaphoreGive(s_lock);
    return v;
}

void app_set_view(app_state_t view)
{
    ensure_lock();
    xSemaphoreTake(s_lock, portMAX_DELAY);
    s_view = view;
    xSemaphoreGive(s_lock);
}

app_state_t app_get_view(void)
{
    ensure_lock();
    xSemaphoreTake(s_lock, portMAX_DELAY);
    app_state_t v = s_view;
    xSemaphoreGive(s_lock);
    return v;
}

void app_enter_keyed_view(app_state_t view)
{
    if (view == APP_STATE_LIFE_COUNTER || view == APP_STATE_CARD_VIEW) {
        app_set_view(view);
    }
}