/**
 * Notification monitoring and metrics tracking
 * Provides logging and metrics for notification delivery, bounces, and failures
 */

type NotificationMetric = {
	type:
		| "email_sent"
		| "email_suppressed"
		| "email_bounce"
		| "email_complaint"
		| "email_failure"
		| "visitor_preference_disabled"
		| "member_preference_disabled";
	email: string;
	conversationId: string;
	organizationId: string;
	reason?: string;
	timestamp: Date;
};

/**
 * Log notification metric for monitoring
 * In production, this should send to a monitoring service like Datadog, Sentry, etc.
 */
export function logNotificationMetric(metric: NotificationMetric): void {
	const logData = {
		...metric,
		timestamp: metric.timestamp.toISOString(),
	};

	// Log to console with structured format for easy parsing
	console.log(`[Notification Metric] ${JSON.stringify(logData)}`);

	// TODO: Send to monitoring service
	// Example integrations:
	// - Datadog: dogstatsd.increment('notification.sent')
	// - Sentry: Sentry.captureMessage('notification_sent', { extra: logData })
	// - CloudWatch: putMetricData(...)
}

/**
 * Log successful email send
 */
export function logEmailSent(params: {
	email: string;
	conversationId: string;
	organizationId: string;
}): void {
	logNotificationMetric({
		type: "email_sent",
		email: params.email,
		conversationId: params.conversationId,
		organizationId: params.organizationId,
		timestamp: new Date(),
	});
}

/**
 * Log suppressed email (bounced/complained)
 */
export function logEmailSuppressed(params: {
	email: string;
	conversationId: string;
	organizationId: string;
	reason: string;
}): void {
	logNotificationMetric({
		type: "email_suppressed",
		email: params.email,
		conversationId: params.conversationId,
		organizationId: params.organizationId,
		reason: params.reason,
		timestamp: new Date(),
	});
}

/**
 * Log email bounce event
 */
export function logEmailBounce(params: {
	email: string;
	organizationId: string;
	bounceType: string;
}): void {
	logNotificationMetric({
		type: "email_bounce",
		email: params.email,
		conversationId: "webhook",
		organizationId: params.organizationId,
		reason: params.bounceType,
		timestamp: new Date(),
	});
}

/**
 * Log email complaint event
 */
export function logEmailComplaint(params: {
	email: string;
	organizationId: string;
}): void {
	logNotificationMetric({
		type: "email_complaint",
		email: params.email,
		conversationId: "webhook",
		organizationId: params.organizationId,
		timestamp: new Date(),
	});
}

/**
 * Log email failure event
 */
export function logEmailFailure(params: {
	email: string;
	organizationId: string;
	reason: string;
}): void {
	logNotificationMetric({
		type: "email_failure",
		email: params.email,
		conversationId: "webhook",
		organizationId: params.organizationId,
		reason: params.reason,
		timestamp: new Date(),
	});
}

/**
 * Calculate bounce rate for monitoring
 * In production, this should query a time-series database
 */
export async function calculateBounceRate(params: {
	organizationId: string;
	timeWindowHours: number;
}): Promise<{
	bounceRate: number;
	totalSent: number;
	totalBounced: number;
}> {
	// TODO: Implement actual calculation from metrics database
	// For now, return placeholder
	console.warn(
		`[Monitoring] Bounce rate calculation not yet implemented for org ${params.organizationId}`
	);

	return {
		bounceRate: 0,
		totalSent: 0,
		totalBounced: 0,
	};
}

/**
 * Check if bounce rate exceeds threshold and should trigger alert
 */
export async function checkBounceRateAlert(params: {
	organizationId: string;
	thresholdPercent: number;
}): Promise<boolean> {
	const stats = await calculateBounceRate({
		organizationId: params.organizationId,
		timeWindowHours: 24,
	});

	if (stats.bounceRate > params.thresholdPercent) {
		console.error(
			`[Alert] High bounce rate detected for org ${params.organizationId}: ${stats.bounceRate}% (threshold: ${params.thresholdPercent}%)`
		);
		// TODO: Send alert via email, Slack, PagerDuty, etc.
		return true;
	}

	return false;
}
