//! dns alert/recovery messages. Domain half of the Alerter split;
//! shared dispatch/cooldown plumbing lives in the parent module.

use tracing::instrument;

use super::{AlertCategory, AlertMeta, Alerter};

impl Alerter {
    #[instrument(skip_all)]
    pub async fn send_dns_mismatch_alert(
        &self,
        target: &str,
        label: &str,
        mismatches: &[crate::types::DnsCheckResult],
    ) {
        let alert_key = format!("dns:{target}");
        let n = mismatches.len();
        let subject = format!("[PoM] {label}: {n} DNS record(s) mismatched");
        let details: Vec<String> = mismatches
            .iter()
            .map(|m| {
                if let Some(ref err) = m.error {
                    format!("  - {} {}: {err}", m.name, m.record_type)
                } else {
                    format!(
                        "  - {} {}: expected {:?}, got {:?}",
                        m.name, m.record_type, m.expected, m.actual
                    )
                }
            })
            .collect();
        let body = format!(
            "Target: {label} ({target})\n\
             DNS mismatches:\n{}\n\
             Instance: {}\n\
             Time: {}\n\n\
             - PoM",
            details.join("\n"),
            self.instance_name,
            chrono::Utc::now().to_rfc3339(),
        );

        self.fire_failure(
            &subject,
            &body,
            "high",
            "pom-dns",
            Some(target),
            AlertMeta {
                key: &alert_key,
                category: AlertCategory::DnsMismatch,
                from: None,
                to: None,
                error: None,
            },
        )
        .await;
    }

    #[instrument(skip_all)]
    pub async fn send_dns_recovery_alert(&self, target: &str, label: &str) {
        let alert_key = format!("dns:{target}");
        let subject = format!("[PoM] {label}: DNS records recovered");
        let body = format!(
            "Target: {label} ({target})\n\
             All DNS records now match expected values.\n\
             Instance: {}\n\
             Time: {}\n\n\
             - PoM",
            self.instance_name,
            chrono::Utc::now().to_rfc3339(),
        );

        self.fire_recovery(
            &subject,
            &body,
            AlertMeta {
                key: &alert_key,
                category: AlertCategory::DnsRecovery,
                from: None,
                to: None,
                error: None,
            },
        )
        .await;
    }
}