<?php
namespace Yoctopuce\YoctoAPI;

/**
 * YDualPower Class: dual power switch control interface, available for instance in the Yocto-Servo
 *
 * The YDualPower class allows you to control
 * the power source to use for module functions that require high current.
 * The module can also automatically disconnect the external power
 * when a voltage drop is observed on the external power source
 * (external battery running out of power).
 */
class YDualPower extends YFunction
{
    const POWERSTATE_OFF = 0;
    const POWERSTATE_FROM_USB = 1;
    const POWERSTATE_FROM_EXT = 2;
    const POWERSTATE_INVALID = -1;
    const POWERCONTROL_AUTO = 0;
    const POWERCONTROL_FROM_USB = 1;
    const POWERCONTROL_FROM_EXT = 2;
    const POWERCONTROL_OFF = 3;
    const POWERCONTROL_INVALID = -1;
    const EXTVOLTAGE_INVALID = YAPI::INVALID_UINT;
    //--- (end of YDualPower declaration)

    //--- (YDualPower attributes)
    protected int $_powerState = self::POWERSTATE_INVALID;     // DualPwrState
    protected int $_powerControl = self::POWERCONTROL_INVALID;   // DualPwrControl
    protected int $_extVoltage = self::EXTVOLTAGE_INVALID;     // UInt31

    //--- (end of YDualPower attributes)

    function __construct(string $str_func)
    {
        //--- (YDualPower constructor)
        parent::__construct($str_func);
        $this->_className = 'DualPower';

        //--- (end of YDualPower constructor)
    }

    //--- (YDualPower implementation)

    function _parseAttr(string $name, mixed $val): int
    {
        switch ($name) {
        case 'powerState':
            $this->_powerState = intval($val);
            return 1;
        case 'powerControl':
            $this->_powerControl = intval($val);
            return 1;
        case 'extVoltage':
            $this->_extVoltage = intval($val);
            return 1;
        }
        return parent::_parseAttr($name, $val);
    }

    /**
     * Returns the current power source for module functions that require lots of current.
     *
     * @return int  a value among YDualPower::POWERSTATE_OFF, YDualPower::POWERSTATE_FROM_USB and
     * YDualPower::POWERSTATE_FROM_EXT corresponding to the current power source for module functions that
     * require lots of current
     *
     * On failure, throws an exception or returns YDualPower::POWERSTATE_INVALID.
     * @throws YAPI_Exception on error
     */
    public function get_powerState(): int
    {
        // $res                    is a enumPWRSTATE;
        if ($this->_cacheExpiration <= YAPI::GetTickCount()) {
            if ($this->load(YAPI::$_yapiContext->GetCacheValidity()) != YAPI::SUCCESS) {
                return self::POWERSTATE_INVALID;
            }
        }
        $res = $this->_powerState;
        return $res;
    }

    /**
     * Returns the selected power source for module functions that require lots of current.
     *
     * @return int  a value among YDualPower::POWERCONTROL_AUTO, YDualPower::POWERCONTROL_FROM_USB,
     * YDualPower::POWERCONTROL_FROM_EXT and YDualPower::POWERCONTROL_OFF corresponding to the selected
     * power source for module functions that require lots of current
     *
     * On failure, throws an exception or returns YDualPower::POWERCONTROL_INVALID.
     * @throws YAPI_Exception on error
     */
    public function get_powerControl(): int
    {
        // $res                    is a enumPWRCTRL;
        if ($this->_cacheExpiration <= YAPI::GetTickCount()) {
            if ($this->load(YAPI::$_yapiContext->GetCacheValidity()) != YAPI::SUCCESS) {
                return self::POWERCONTROL_INVALID;
            }
        }
        $res = $this->_powerControl;
        return $res;
    }

    /**
     * Changes the selected power source for module functions that require lots of current.
     * Remember to call the saveToFlash() method of the module if the modification must be kept.
     *
     * @param int $newval : a value among YDualPower::POWERCONTROL_AUTO, YDualPower::POWERCONTROL_FROM_USB,
     * YDualPower::POWERCONTROL_FROM_EXT and YDualPower::POWERCONTROL_OFF corresponding to the selected
     * power source for module functions that require lots of current
     *
     * @return int  YAPI::SUCCESS if the call succeeds.
     *
     * On failure, throws an exception or returns a negative error code.
     * @throws YAPI_Exception on error
     */
    public function set_powerControl(int $newval): int
    {
        $rest_val = strval($newval);
        return $this->_setAttr("powerControl", $rest_val);
    }

    /**
     * Returns the measured voltage on the external power source, in millivolts.
     *
     * @return int  an integer corresponding to the measured voltage on the external power source, in millivolts
     *
     * On failure, throws an exception or returns YDualPower::EXTVOLTAGE_INVALID.
     * @throws YAPI_Exception on error
     */
    public function get_extVoltage(): int
    {
        // $res                    is a int;
        if ($this->_cacheExpiration <= YAPI::GetTickCount()) {
            if ($this->load(YAPI::$_yapiContext->GetCacheValidity()) != YAPI::SUCCESS) {
                return self::EXTVOLTAGE_INVALID;
            }
        }
        $res = $this->_extVoltage;
        return $res;
    }

    /**
     * Retrieves a dual power switch for a given identifier.
     * The identifier can be specified using several formats:
     *
     * - FunctionLogicalName
     * - ModuleSerialNumber.FunctionIdentifier
     * - ModuleSerialNumber.FunctionLogicalName
     * - ModuleLogicalName.FunctionIdentifier
     * - ModuleLogicalName.FunctionLogicalName
     *
     *
     * This function does not require that the dual power switch is online at the time
     * it is invoked. The returned object is nevertheless valid.
     * Use the method isOnline() to test if the dual power switch is
     * indeed online at a given time. In case of ambiguity when looking for
     * a dual power switch by logical name, no error is notified: the first instance
     * found is returned. The search is performed first by hardware name,
     * then by logical name.
     *
     * If a call to this object's is_online() method returns FALSE although
     * you are certain that the matching device is plugged, make sure that you did
     * call registerHub() at application initialization time.
     *
     * @param string $func : a string that uniquely characterizes the dual power switch, for instance
     *         SERVORC1.dualPower.
     *
     * @return YDualPower  a YDualPower object allowing you to drive the dual power switch.
     */
    public static function FindDualPower(string $func): YDualPower
    {
        // $obj                    is a YDualPower;
        $obj = YFunction::_FindFromCache('DualPower', $func);
        if ($obj == null) {
            $obj = new YDualPower($func);
            YFunction::_AddToCache('DualPower', $func, $obj);
        }
        return $obj;
    }

    /**
     * @throws YAPI_Exception
     */
    public function powerState(): int
{
    return $this->get_powerState();
}

    /**
     * @throws YAPI_Exception
     */
    public function powerControl(): int
{
    return $this->get_powerControl();
}

    /**
     * @throws YAPI_Exception
     */
    public function setPowerControl(int $newval): int
{
    return $this->set_powerControl($newval);
}

    /**
     * @throws YAPI_Exception
     */
    public function extVoltage(): int
{
    return $this->get_extVoltage();
}

    /**
     * Continues the enumeration of dual power switches started using yFirstDualPower().
     * Caution: You can't make any assumption about the returned dual power switches order.
     * If you want to find a specific a dual power switch, use DualPower.findDualPower()
     * and a hardwareID or a logical name.
     *
     * @return ?YDualPower  a pointer to a YDualPower object, corresponding to
     *         a dual power switch currently online, or a null pointer
     *         if there are no more dual power switches to enumerate.
     */
    public function nextDualPower(): ?YDualPower
    {
        $resolve = YAPI::resolveFunction($this->_className, $this->_func);
        if ($resolve->errorType != YAPI::SUCCESS) {
            return null;
        }
        $next_hwid = YAPI::getNextHardwareId($this->_className, $resolve->result);
        if ($next_hwid == null) {
            return null;
        }
        return self::FindDualPower($next_hwid);
    }

    /**
     * Starts the enumeration of dual power switches currently accessible.
     * Use the method YDualPower::nextDualPower() to iterate on
     * next dual power switches.
     *
     * @return ?YDualPower  a pointer to a YDualPower object, corresponding to
     *         the first dual power switch currently online, or a null pointer
     *         if there are none.
     */
    public static function FirstDualPower(): ?YDualPower
    {
        $next_hwid = YAPI::getFirstHardwareId('DualPower');
        if ($next_hwid == null) {
            return null;
        }
        return self::FindDualPower($next_hwid);
    }

    //--- (end of YDualPower implementation)

}
