use axum::Json;
use mongodb::bson::doc;

use super::dto::*;
use compliance_core::models::ScanRun;

#[tracing::instrument(skip_all)]
pub async fn health() -> Json<serde_json::Value> {
    Json(serde_json::json!({ "status": "ok" }))
}

#[tracing::instrument(skip_all)]
pub async fn stats_overview(axum::extract::Extension(agent): AgentExt) -> ApiResult<OverviewStats> {
    let db = &agent.db;

    let total_repositories = db
        .repositories()
        .count_documents(doc! {})
        .await
        .unwrap_or(0);
    let total_findings = db.findings().count_documents(doc! {}).await.unwrap_or(0);
    let critical_findings = db
        .findings()
        .count_documents(doc! { "severity": "critical" })
        .await
        .unwrap_or(0);
    let high_findings = db
        .findings()
        .count_documents(doc! { "severity": "high" })
        .await
        .unwrap_or(0);
    let medium_findings = db
        .findings()
        .count_documents(doc! { "severity": "medium" })
        .await
        .unwrap_or(0);
    let low_findings = db
        .findings()
        .count_documents(doc! { "severity": "low" })
        .await
        .unwrap_or(0);
    let total_sbom_entries = db
        .sbom_entries()
        .count_documents(doc! {})
        .await
        .unwrap_or(0);
    let total_cve_alerts = db.cve_alerts().count_documents(doc! {}).await.unwrap_or(0);
    let total_issues = db
        .tracker_issues()
        .count_documents(doc! {})
        .await
        .unwrap_or(0);

    let recent_scans: Vec<ScanRun> = match db
        .scan_runs()
        .find(doc! {})
        .sort(doc! { "started_at": -1 })
        .limit(10)
        .await
    {
        Ok(cursor) => collect_cursor_async(cursor).await,
        Err(e) => {
            tracing::warn!("Failed to fetch recent scans: {e}");
            Vec::new()
        }
    };

    Ok(Json(ApiResponse {
        data: OverviewStats {
            total_repositories,
            total_findings,
            critical_findings,
            high_findings,
            medium_findings,
            low_findings,
            total_sbom_entries,
            total_cve_alerts,
            total_issues,
            recent_scans,
        },
        total: None,
        page: None,
    }))
}