#include "QBreathingLight.h"
#include <QPainter>
#include <QColor>
#include <algorithm>


QBreathingLight::QBreathingLight(QWidget *parent)
	: QWidget(parent)
	, m_opacity(1.0f)
	, m_isFlashing(false)
	, m_flashColor(Qt::red)
	, m_flashDuration(3000) // 默认闪烁3秒
{
	// 设置固定大小
	setFixedSize(40, 40);

	// 连接定时器信号槽
	connect(&m_animationTimer, &QTimer::timeout, this, &QBreathingLight::updateAnimation);
}
void QBreathingLight::setFlashDuration(int milliseconds)
{
	m_flashDuration = milliseconds;
}

void QBreathingLight::setFlashColor(const QColor &color)
{
	m_flashColor = color;
}

void QBreathingLight::triggerSignal()
{
	if (!m_isFlashing) {
		m_isFlashing = true;
		m_flashStartTime = QTime::currentTime();
		m_animationTimer.start(30); // 30ms更新一次
	}
}

void QBreathingLight::paintEvent(QPaintEvent *event)
{
	Q_UNUSED(event);

	QPainter painter(this);
	painter.setRenderHint(QPainter::Antialiasing);

	// 绘制背景
	painter.fillRect(rect(), QBrush(QColor(240, 240, 240)));

	// 计算中心点
	QPoint center = rect().center();
	int radius = qMin(width(), height()) / 3;

	// 根据状态设置颜色
	QColor color;
	if (m_isFlashing) {
		color = m_flashColor;
		color.setAlphaF(m_opacity);
	}
	else {
		color = Qt::green; // 未激活状态显示灰色
	}

	// 绘制呼吸灯
	painter.setBrush(QBrush(color));
	painter.setPen(Qt::NoPen);
	painter.drawEllipse(center, radius, radius);
}

void QBreathingLight::updateAnimation()
{
	// 检查是否超过闪烁持续时间
	int elapsed = m_flashStartTime.msecsTo(QTime::currentTime());
	if (elapsed >= m_flashDuration) {
		m_isFlashing = false;
		m_opacity = 1.0f;
		m_animationTimer.stop();
		update();
		return;
	}

	// 计算呼吸效果 (使用正弦函数实现平滑呼吸效果)
	float progress = static_cast<float>(elapsed) / m_flashDuration;
	m_opacity = 0.5f * (1.0f + sin(progress * 2 * 3.14 * 5)); // 每秒闪烁2次

	update(); // 触发重绘
}