package httpapi

import (
	"context"
	"net/http"
	"time"
)

// handleHealth reports process liveness and database reachability.
//
// Returns 503 when the database cannot be pinged, so a container orchestrator
// restarts a wedged process instead of routing traffic to it.
func (s *Server) handleHealth(w http.ResponseWriter, r *http.Request) {
	ctx, cancel := context.WithTimeout(r.Context(), 2*time.Second)
	defer cancel()

	dbStatus := "ok"
	code := http.StatusOK
	if err := s.db.PingContext(ctx); err != nil {
		dbStatus = "unreachable"
		code = http.StatusServiceUnavailable
		s.log.Error("health check: database unreachable", "err", err)
	}

	status := "ok"
	if code != http.StatusOK {
		status = "degraded"
	}

	writeJSON(w, code, map[string]any{
		"status":         status,
		"version":        s.version,
		"uptime_seconds": int(time.Since(s.started).Seconds()),
		"database":       dbStatus,
	})
}

// handleVersion returns build information.
func (s *Server) handleVersion(w http.ResponseWriter, r *http.Request) {
	writeJSON(w, http.StatusOK, map[string]any{
		"name":    "vellum",
		"version": s.version,
		"api":     "v1",
	})
}