package http

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

	"github.com/go-chi/chi/v5"
	chimiddleware "github.com/go-chi/chi/v5/middleware"
	"github.com/go-chi/render"
	"github.com/opencloud-eu/opencloud/pkg/account"
	"github.com/opencloud-eu/opencloud/pkg/cors"
	"github.com/opencloud-eu/opencloud/pkg/middleware"
	ohttp "github.com/opencloud-eu/opencloud/pkg/service/http"
	"github.com/opencloud-eu/opencloud/pkg/version"
	"github.com/opencloud-eu/opencloud/services/graph/pkg/errorcode"
	"github.com/opencloud-eu/opencloud/services/invitations/pkg/invitations"
	svc "github.com/opencloud-eu/opencloud/services/invitations/pkg/service/v0"
	"go-micro.dev/v4"
)

// Server initializes the http service and server.
func Server(opts ...Option) (ohttp.Service, error) {
	options := newOptions(opts...)
	service := options.Service

	svc, err := ohttp.NewService(
		ohttp.TLSConfig(options.Config.HTTP.TLS),
		ohttp.Logger(options.Logger),
		ohttp.Namespace(options.Config.HTTP.Namespace),
		ohttp.Name(options.Config.Service.Name),
		ohttp.Version(version.GetString()),
		ohttp.Address(options.Config.HTTP.Addr),
		ohttp.Context(options.Context),
		ohttp.Flags(options.Flags...),
	)
	if err != nil {
		options.Logger.Error().
			Err(err).
			Msg("Error initializing http service")
		return ohttp.Service{}, err
	}

	mux := chi.NewMux()

	mux.Use(chimiddleware.RealIP)
	mux.Use(chimiddleware.RequestID)
	mux.Use(middleware.TraceContext)
	mux.Use(middleware.NoCache)
	mux.Use(
		middleware.Cors(
			cors.Logger(options.Logger),
			cors.AllowedOrigins(options.Config.HTTP.CORS.AllowedOrigins),
			cors.AllowedMethods(options.Config.HTTP.CORS.AllowedMethods),
			cors.AllowedHeaders(options.Config.HTTP.CORS.AllowedHeaders),
			cors.AllowCredentials(options.Config.HTTP.CORS.AllowCredentials),
		))

	mux.Use(middleware.Version(
		options.Name,
		version.String,
	))
	mux.Use(middleware.ExtractAccountUUID(
		account.Logger(options.Logger),
		account.JWTSecret(options.Config.TokenManager.JWTSecret),
	))

	// this logs http request related data
	mux.Use(middleware.Logger(
		options.Logger,
	))

	mux.Route(options.Config.HTTP.Root, func(r chi.Router) {
		r.Post("/invitations", InvitationHandler(service))
	})

	err = micro.RegisterHandler(svc.Server(), mux)
	if err != nil {
		options.Logger.Fatal().Err(err).Msg("failed to register the handler")
	}

	svc.Init()
	return svc, nil
}

func InvitationHandler(service svc.Service) func(w http.ResponseWriter, r *http.Request) {
	return func(w http.ResponseWriter, r *http.Request) {
		ctx := r.Context()

		i := &invitations.Invitation{}
		err := json.NewDecoder(r.Body).Decode(i)
		if err != nil {
			errorcode.InvalidRequest.Render(w, r, http.StatusBadRequest, fmt.Sprintf("invalid request body: %v", err.Error()))
			return
		}

		res, err := service.Invite(ctx, i)
		if err != nil {
			render.Status(r, http.StatusInternalServerError)
			render.PlainText(w, r, err.Error())
			return
		}

		render.Status(r, http.StatusCreated)
		render.JSON(w, r, res)
	}
}