/*************************************************************************/
/*  power_windows.cpp                                                    */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
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#include "power_windows.h"

// CODE CHUNK IMPORTED FROM SDL 2.0

bool PowerWindows::GetPowerInfo_Windows()
{
    SYSTEM_POWER_STATUS status;
    bool need_details = FALSE;

    /* This API should exist back to Win95. */
    if (!GetSystemPowerStatus(&status))
    {
        /* !!! FIXME: push GetLastError() into GetError() */
        power_state = POWERSTATE_UNKNOWN;
    } else if (status.BatteryFlag == 0xFF) {    /* unknown state */
        power_state = POWERSTATE_UNKNOWN;
    } else if (status.BatteryFlag & (1 << 7)) { /* no battery */
        power_state = POWERSTATE_NO_BATTERY;
    } else if (status.BatteryFlag & (1 << 3)) { /* charging */
        power_state = POWERSTATE_CHARGING;
        need_details = TRUE;
    } else if (status.ACLineStatus == 1) {
        power_state = POWERSTATE_CHARGED;        /* on AC, not charging. */
        need_details = TRUE;
    } else {
        power_state = POWERSTATE_ON_BATTERY;     /* not on AC. */
        need_details = TRUE;
    }

    percent_left = -1;
    nsecs_left = -1;
    if (need_details) {
        const int pct = (int) status.BatteryLifePercent;
        const int secs = (int) status.BatteryLifeTime;

        if (pct != 255) {       /* 255 == unknown */
        	percent_left = (pct > 100) ? 100 : pct; /* clamp between 0%, 100% */
        }
        if (secs != 0xFFFFFFFF) {       /* ((DWORD)-1) == unknown */
            nsecs_left = secs;
        }
    }

    return TRUE;            /* always the definitive answer on Windows. */
}

PowerState PowerWindows::get_power_state() {
	if (GetPowerInfo_Windows()) {
		return power_state;
	}
	else {
		return POWERSTATE_UNKNOWN;
	}
}

int PowerWindows::get_power_seconds_left() {
	if (GetPowerInfo_Windows()) {
		return nsecs_left;
	}
	else {
		return -1;
	}
}

int PowerWindows::get_power_percent_left() {
	if (GetPowerInfo_Windows()) {
		return percent_left;
	}
	else {
		return -1;
	}
}

PowerWindows::PowerWindows() : nsecs_left(-1), percent_left(-1), power_state(POWERSTATE_UNKNOWN) {

}

PowerWindows::~PowerWindows() {
}