//! Model sync from OpenRouter — syncs AI model metadata into the local database.

use crate::error::AgentError;

/// Response from `GET /v1/models`.
#[derive(Debug, serde::Deserialize)]
pub struct ModelsListResponse {
    pub data: Vec<ModelEntry>,
}

#[derive(Debug, serde::Deserialize)]
pub struct ModelEntry {
    pub id: String,
}

/// List accessible model IDs from the AI endpoint.
pub async fn list_accessible_models(
    client: &reqwest::Client,
    base_url: &str,
    api_key: &str,
) -> Result<std::collections::HashSet<String>, AgentError> {
    let base = base_url.trim_end_matches('/');
    let url = if base.ends_with("/v1") {
        format!("{}/models", base)
    } else {
        format!("{}/v1/models", base)
    };
    let resp = client
        .get(&url)
        .header("Authorization", format!("Bearer {}", api_key))
        .send()
        .await
        .map_err(|e| AgentError::Internal(format!("failed to list models: {}", e)))?;

    let body: ModelsListResponse = resp
        .json()
        .await
        .map_err(|e| AgentError::Internal(format!("failed to parse models response: {}", e)))?;

    Ok(body.data.into_iter().map(|m| m.id).collect())
}