package router

import (
	"encoding/json"
	"net/http"

	"mgit.msbls.de/m/KanzlAI-mGMT/internal/auth"
	"mgit.msbls.de/m/KanzlAI-mGMT/internal/handlers"
	"mgit.msbls.de/m/KanzlAI-mGMT/internal/services"

	"github.com/jmoiron/sqlx"
)

func New(db *sqlx.DB, authMW *auth.Middleware) http.Handler {
	mux := http.NewServeMux()

	// Public routes
	mux.HandleFunc("GET /health", handleHealth(db))

	// Services
	appointmentSvc := services.NewAppointmentService(db)

	// Handlers
	apptH := handlers.NewAppointmentHandler(appointmentSvc)

	// Authenticated API routes
	api := http.NewServeMux()
	api.HandleFunc("GET /api/cases", placeholder("cases"))
	api.HandleFunc("GET /api/deadlines", placeholder("deadlines"))
	api.HandleFunc("GET /api/documents", placeholder("documents"))

	// Appointments CRUD
	api.HandleFunc("GET /api/appointments", apptH.List)
	api.HandleFunc("POST /api/appointments", apptH.Create)
	api.HandleFunc("PUT /api/appointments/{id}", apptH.Update)
	api.HandleFunc("DELETE /api/appointments/{id}", apptH.Delete)

	mux.Handle("/api/", authMW.RequireAuth(api))

	return mux
}

func handleHealth(db *sqlx.DB) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		if err := db.Ping(); err != nil {
			w.WriteHeader(http.StatusServiceUnavailable)
			json.NewEncoder(w).Encode(map[string]string{"status": "error", "error": err.Error()})
			return
		}
		w.Header().Set("Content-Type", "application/json")
		json.NewEncoder(w).Encode(map[string]string{"status": "ok"})
	}
}

func placeholder(resource string) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Content-Type", "application/json")
		json.NewEncoder(w).Encode(map[string]string{
			"status":   "not_implemented",
			"resource": resource,
		})
	}
}