//
// Created by erki on 17.04.21.
//

#include <catch2/catch.hpp>

#include "peripherals_button.hpp"

namespace
{

struct HAL
{
  HAL()
  {
    millis = 1;
  }

  ~HAL()
  {
    millis = 1;
  }

  static std::uint32_t millis;

  static std::uint32_t getMillis()
  {
    return millis;
  }
};

std::uint32_t HAL::millis = 1;

struct Gpio
{
  static bool is_set;

  Gpio()
  {
    is_set = false;
  }

  bool read() const
  {
    return is_set;
  }

  void set(const bool value)
  {}

  void toggle()
  {}
};

bool Gpio::is_set = false;

}// namespace

using Button = Peripherals::Button<Gpio, HAL>;

TEST_CASE("Button reads no press as NOT_PRESSED.", "[peripherals],[button]")
{
  Gpio g;
  HAL hal;

  Button button{g};

  button.update();

  HAL::millis = Button::TIMEOUT_LONG_PRESS + 10;

  button.update();

  REQUIRE(button.getState() == Peripherals::ButtonPress::NOT_PRESSED);
}

TEST_CASE("Button reads presses properly.", "[peripherals],[button]")
{
  Gpio g;
  HAL hal;

  Button button{g};

  Gpio::is_set = true;
  button.update();

  SECTION("Too short of a press is debounced.")
  {
    HAL::millis = Button::TIMEOUT_SHORT_PRESS - 1;
    Gpio::is_set = false;

    button.update();

    REQUIRE(button.getState() == Peripherals::ButtonPress::NOT_PRESSED);
  }

  SECTION("Short press is identified properly.")
  {
    HAL::millis = Button::TIMEOUT_SHORT_PRESS + 2;
    Gpio::is_set = false;

    button.update();

    REQUIRE(button.getState() == Peripherals::ButtonPress::SHORT_PRESS);

    SECTION("Next state is NOT_PRESSED.")
    {
      HAL::millis += 1;
      button.update();

      REQUIRE(button.getState() == Peripherals::ButtonPress::NOT_PRESSED);
    }
  }

  SECTION("Long press is identified properly.")
  {
    HAL::millis = Button::TIMEOUT_LONG_PRESS + 2;

    button.update();

    REQUIRE(button.getState() == Peripherals::ButtonPress::LONG_PRESS);

    SECTION("Next state is NOT_PRESSED.")
    {
      HAL::millis += 1;
      button.update();

      REQUIRE(button.getState() == Peripherals::ButtonPress::NOT_PRESSED);

      SECTION("Releasing keeps NOT_PRESSED state.")
      {
        HAL::millis += 1;
        Gpio::is_set = false;

        button.update();

        REQUIRE(button.getState() == Peripherals::ButtonPress::NOT_PRESSED);
      }
    }
  }
}