// notifyprefs-api ist der Aufrufpunkt fuer CFG-06: startet den bereits
// fertigen CFG-04-Handler (internal/notifyprefs) als eigenstaendigen
// HTTP-Dienst, hinter derselben Session-Auth wie IAM-16 (account-api) —
// GLEICHER JWT-Secret. REINES WIRING — keine Aenderung an
// internal/notifyprefs/.
package main

import (
	"context"
	"log"
	"net/http"
	"os"

	"github.com/jackc/pgx/v5/pgxpool"

	"gitea.perlbach24.de/scripte/nexarch/internal/auth"
	"gitea.perlbach24.de/scripte/nexarch/internal/notifyprefs"
)

func requireEnv(name string) string {
	v := os.Getenv(name)
	if v == "" {
		log.Fatalf("%s muss gesetzt sein", name)
	}
	return v
}

func main() {
	dsn := requireEnv("NEXARCH_NOTIFYPREFS_TENANT_DSN")
	// MUSS identisch mit NEXARCH_ACCOUNT_JWT_SECRET (IAM-16) sein, sonst
	// verwirft dieser Dienst gueltige account-api-Sessions.
	jwtSecret := requireEnv("NEXARCH_NOTIFYPREFS_JWT_SECRET")
	addr := os.Getenv("NEXARCH_NOTIFYPREFS_API_LISTEN_ADDR")
	if addr == "" {
		addr = "127.0.0.1:8101"
	}

	ctx := context.Background()
	pool, err := pgxpool.New(ctx, dsn)
	if err != nil {
		log.Fatalf("datenbankverbindung: %v", err)
	}
	defer pool.Close()

	tokenIssuer := auth.NewTokenIssuer(jwtSecret)
	handler := notifyprefs.NewHandler(notifyprefs.NewStore(pool))

	mux := http.NewServeMux()
	mux.HandleFunc("/healthz", func(w http.ResponseWriter, r *http.Request) { w.WriteHeader(http.StatusOK) })

	mux.HandleFunc("GET /notifications/preferences", auth.RequireAuth(tokenIssuer, handler.ListMine))
	mux.HandleFunc("POST /notifications/preferences", auth.RequireAuth(tokenIssuer, handler.SetPreference))
	mux.HandleFunc("GET /notifications/preferences/tenant", auth.RequireAuth(tokenIssuer, handler.ListTenantOverview))

	log.Printf("notifyprefs-api: listening on %s", addr)
	if err := http.ListenAndServe(addr, mux); err != nil {
		log.Fatalf("http server: %v", err)
	}
}