package client

import (
	"context"
	"net/url"

	"github.com/keegancsmith/rpc"
	"github.com/pkg/errors"
	"gitlab.com/wpetit/goweb/logger"

	"forge.cadoles.com/arcad/edge/pkg/storage"
	"forge.cadoles.com/arcad/edge/pkg/storage/driver/rpc/server/document"
	"forge.cadoles.com/arcad/edge/pkg/storage/filter"
)

type DocumentStore struct {
	serverURL *url.URL
}

// Delete implements storage.DocumentStore.
func (s *DocumentStore) Delete(ctx context.Context, collection string, id storage.DocumentID) error {
	args := document.DeleteDocumentArgs{
		Collection: collection,
		DocumentID: id,
	}

	reply := document.DeleteDocumentReply{}

	if err := s.call(ctx, "Service.DeleteDocument", args, &reply); err != nil {
		return errors.WithStack(err)
	}

	return nil
}

// Get implements storage.DocumentStore.
func (s *DocumentStore) Get(ctx context.Context, collection string, id storage.DocumentID) (storage.Document, error) {
	args := document.GetDocumentArgs{
		Collection: collection,
		DocumentID: id,
	}

	reply := document.GetDocumentReply{}

	if err := s.call(ctx, "Service.GetDocument", args, &reply); err != nil {
		return nil, errors.WithStack(err)
	}

	return reply.Document, nil
}

// Query implements storage.DocumentStore.
func (s *DocumentStore) Query(ctx context.Context, collection string, filter *filter.Filter, funcs ...storage.QueryOptionFunc) ([]storage.Document, error) {
	opts := &storage.QueryOptions{}
	for _, fn := range funcs {
		fn(opts)
	}

	args := document.QueryDocumentsArgs{
		Collection: collection,
		Filter:     nil,
		Options:    opts,
	}

	if filter != nil {
		args.Filter = filter.AsMap()
	}

	reply := document.QueryDocumentsReply{
		Documents: []storage.Document{},
	}

	if err := s.call(ctx, "Service.QueryDocuments", args, &reply); err != nil {
		return nil, errors.WithStack(err)
	}

	return reply.Documents, nil
}

// Upsert implements storage.DocumentStore.
func (s *DocumentStore) Upsert(ctx context.Context, collection string, doc storage.Document) (storage.Document, error) {
	args := document.UpsertDocumentArgs{
		Collection: collection,
		Document:   doc,
	}

	reply := document.UpsertDocumentReply{}

	if err := s.call(ctx, "Service.UpsertDocument", args, &reply); err != nil {
		return nil, errors.WithStack(err)
	}

	return reply.Document, nil
}

func (s *DocumentStore) call(ctx context.Context, serviceMethod string, args any, reply any) error {
	err := s.withClient(ctx, func(ctx context.Context, client *rpc.Client) error {
		if err := client.Call(ctx, serviceMethod, args, reply); err != nil {
			return errors.WithStack(err)
		}

		return nil
	})
	if err != nil {
		return errors.WithStack(err)
	}

	return nil
}

func (s *DocumentStore) withClient(ctx context.Context, fn func(ctx context.Context, client *rpc.Client) error) error {
	client, err := rpc.DialHTTPPath("tcp", s.serverURL.Host, s.serverURL.Path+"?"+s.serverURL.RawQuery)
	if err != nil {
		return errors.WithStack(err)
	}

	defer func() {
		if err := client.Close(); err != nil {
			logger.Error(ctx, "could not close rpc client", logger.CapturedE(errors.WithStack(err)))
		}
	}()

	if err := fn(ctx, client); err != nil {
		return errors.WithStack(err)
	}

	return nil
}

func NewDocumentStore(url *url.URL) *DocumentStore {
	return &DocumentStore{url}
}

var _ storage.DocumentStore = &DocumentStore{}