package document

import (
	"context"
	"github.com/anytypeio/go-anytype-infrastructure-experiments/client/clientspace"
	"github.com/anytypeio/go-anytype-infrastructure-experiments/client/clientspace/clientcache"
	"github.com/anytypeio/go-anytype-infrastructure-experiments/client/document/textdocument"
	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/account"
	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/app"
	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/app/logger"
	"github.com/anytypeio/go-anytype-infrastructure-experiments/common/commonspace/treegetter"
)

type Service interface {
	app.Component
	CreateDocument(spaceId string) (id string, err error)
	DeleteDocument(spaceId, documentId string) (err error)
	AllDocumentIds(spaceId string) (ids []string, err error)
	AllDocumentHeads(spaceId string) (ids []headsync.TreeHeads, err error)
	AddText(spaceId, documentId, text string, isSnapshot bool) (root, head string, err error)
	DumpDocumentTree(spaceId, documentId string) (dump string, err error)
	TreeParams(spaceId, documentId string) (root string, head []string, err error)
}

const CName = "client.document"

var log = logger.NewNamed(CName)

type service struct {
	account      account.Service
	spaceService clientspace.Service
	cache        clientcache.TreeCache
}

func New() Service {
	return &service{}
}

func (s *service) Init(a *app.App) (err error) {
	s.account = a.MustComponent(account.CName).(account.Service)
	s.spaceService = a.MustComponent(clientspace.CName).(clientspace.Service)
	s.cache = a.MustComponent(treegetter.CName).(clientcache.TreeCache)
	return
}

func (s *service) Name() (name string) {
	return CName
}

func (s *service) CreateDocument(spaceId string) (id string, err error) {
	space, err := s.spaceService.GetSpace(context.Background(), spaceId)
	if err != nil {
		return
	}
	id, err = textdocument.CreateTextDocument(context.Background(), space, s.account)
	return
}

func (s *service) DeleteDocument(spaceId, documentId string) (err error) {
	space, err := s.spaceService.GetSpace(context.Background(), spaceId)
	if err != nil {
		return
	}
	return space.DeleteTree(context.Background(), documentId)
}

func (s *service) AllDocumentIds(spaceId string) (ids []string, err error) {
	space, err := s.spaceService.GetSpace(context.Background(), spaceId)
	if err != nil {
		return
	}
	ids = space.StoredIds()
	return
}

func (s *service) AllDocumentHeads(spaceId string) (ids []headsync.TreeHeads, err error) {
	space, err := s.spaceService.GetSpace(context.Background(), spaceId)
	if err != nil {
		return
	}
	ids = space.DebugAllHeads()
	return
}

func (s *service) AddText(spaceId, documentId, text string, isSnapshot bool) (root, head string, err error) {
	doc, err := s.cache.GetDocument(context.Background(), spaceId, documentId)
	if err != nil {
		return
	}
	return doc.AddText(text, isSnapshot)
}

func (s *service) DumpDocumentTree(spaceId, documentId string) (dump string, err error) {
	doc, err := s.cache.GetDocument(context.Background(), spaceId, documentId)
	if err != nil {
		return
	}
	return doc.DebugDump()
}

func (s *service) TreeParams(spaceId, documentId string) (root string, heads []string, err error) {
	tr, err := s.cache.GetTree(context.Background(), spaceId, documentId)
	if err != nil {
		return
	}
	return tr.Root().Id, tr.Heads(), nil
}