package health

import (
	"encoding/json"
	"fmt"
	"log/slog"
	"net/http"

	"payouts/internal/service/database"
)

// Route health route
const Route = "/health"

// New constructs a new health Handler.
func New(dbService database.Service) (Handler, error) {
	return &handler{
		dbService: dbService,
	}, nil
}

type handler struct {
	dbService database.Service
}

// HealthHandler handles the health check requests
func (h *handler) Health(w http.ResponseWriter, r *http.Request) {
	defer r.Body.Close()
	w.Header().Set("Content-Type", "application/json")

	status := map[string]any{}

	// Check database connection
	err := h.dbService.HealthCheck()
	if err != nil {
		w.WriteHeader(http.StatusServiceUnavailable)
		status["Error"] = fmt.Sprintf("%v", err)
		slog.Error("Health check failed", slog.String("error", status["Error"].(string)))
	} else {
		w.WriteHeader(http.StatusOK)
	}
	status["OK"] = (err == nil)

	encoder := json.NewEncoder(w)
	encoder.Encode(status)
}