package graph

import (
	"net/http"

	"github.com/brasse-b/archivum/internal/config"
)

// NewServer wires up the HTTP handler for the GraphQL endpoint.
// cfg may be nil when the system has not been configured yet; in that case
// every GraphQL request returns {"data":{"systemStatus":"REQUIRE_SETUP"}} so
// the frontend can redirect to the Setup Wizard.
func NewServer(cfg *config.Config) http.Handler {
	mux := http.NewServeMux()

	mux.HandleFunc("/graphql", func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/json")
		w.Header().Set("Access-Control-Allow-Origin", "*")
		w.Header().Set("Access-Control-Allow-Headers", "Content-Type, Authorization")
		if r.Method == http.MethodOptions {
			w.WriteHeader(http.StatusNoContent)
			return
		}

		if cfg == nil {
			w.WriteHeader(http.StatusOK)
			_, _ = w.Write([]byte(`{"data":{"systemStatus":"REQUIRE_SETUP"}}`))
			return
		}

		// TODO: replace with gqlgen handler once generated.
		w.WriteHeader(http.StatusOK)
		_, _ = w.Write([]byte(`{"data":{"systemStatus":"OK"}}`))
	})

	mux.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
	})

	// Serve the embedded Vue SPA for every other path.
	mux.Handle("/", http.FileServer(http.Dir("/srv/archivum/ui")))

	return mux
}