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use anyhow::{anyhow, Result};
use serde::{Deserialize, Serialize};
use serde_json::json;

/// Response to host lookup requests
#[derive(Serialize, Deserialize, Debug, Clone)]
pub struct LookupResponse {
    /// list of Ips that have been resolved
    pub ips: Vec<String>,
}

/// Lookup the addresses for a given hostname via DNS
pub fn lookup_host(host: &str) -> Result<LookupResponse> {
    let req = json!(host);
    let msg = serde_json::to_vec(&req)
        .map_err(|e| anyhow!("error serializing the validation request: {}", e))?;
    let response_raw = wapc_guest::host_call("kubewarden", "net", "v1/dns_lookup_host", &msg)
        .map_err(|e| anyhow!("error invoking wapc net.dns_lookup_host : {:?}", e))?;

    let response: LookupResponse = serde_json::from_slice(&response_raw)?;

    Ok(response)
}