package morph

import (
	"fmt"
	"sort"

	frostfsidclient "git.frostfs.info/TrueCloudLab/frostfs-contract/frostfsid/client"
	commonCmd "git.frostfs.info/TrueCloudLab/frostfs-node/cmd/internal/common"
	"github.com/nspcc-dev/neo-go/pkg/encoding/address"
	"github.com/nspcc-dev/neo-go/pkg/io"
	"github.com/nspcc-dev/neo-go/pkg/rpcclient/management"
	"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
	"github.com/nspcc-dev/neo-go/pkg/vm/emit"
	"github.com/spf13/cobra"
	"github.com/spf13/viper"
)

const (
	namespaceFlag    = "namespace"
	subjectNameFlag  = "subject-name"
	subjectKeyFlag   = "subject-key"
	includeNamesFlag = "include-names"
	groupNameFlag    = "group-name"
)

var (
	frostfsidCmd = &cobra.Command{
		Use:   "frostfsid",
		Short: "Section for frostfsid interactions commands",
	}

	frostfsidCreateNamespaceCmd = &cobra.Command{
		Use:   "create-namespace",
		Short: "Create new namespace in frostfsid contract",
		PreRun: func(cmd *cobra.Command, _ []string) {
			_ = viper.BindPFlag(alphabetWalletsFlag, cmd.Flags().Lookup(alphabetWalletsFlag))
			_ = viper.BindPFlag(endpointFlag, cmd.Flags().Lookup(endpointFlag))
		},
		Run: frostfsidCreateNamespace,
	}

	frostfsidListNamespacesCmd = &cobra.Command{
		Use:   "list-namespaces",
		Short: "List all namespaces in frostfsid",
		PreRun: func(cmd *cobra.Command, _ []string) {
			_ = viper.BindPFlag(alphabetWalletsFlag, cmd.Flags().Lookup(alphabetWalletsFlag))
			_ = viper.BindPFlag(endpointFlag, cmd.Flags().Lookup(endpointFlag))
		},
		Run: frostfsidListNamespaces,
	}

	frostfsidCreateSubjectCmd = &cobra.Command{
		Use:   "create-subject",
		Short: "Create subject in frostfsid contract",
		PreRun: func(cmd *cobra.Command, _ []string) {
			_ = viper.BindPFlag(alphabetWalletsFlag, cmd.Flags().Lookup(alphabetWalletsFlag))
			_ = viper.BindPFlag(endpointFlag, cmd.Flags().Lookup(endpointFlag))
		},
		Run: frostfsidCreateSubject,
	}

	frostfsidDeleteSubjectCmd = &cobra.Command{
		Use:   "delete-subject",
		Short: "Delete subject from frostfsid contract",
		PreRun: func(cmd *cobra.Command, _ []string) {
			_ = viper.BindPFlag(alphabetWalletsFlag, cmd.Flags().Lookup(alphabetWalletsFlag))
			_ = viper.BindPFlag(endpointFlag, cmd.Flags().Lookup(endpointFlag))
		},
		Run: frostfsidDeleteSubject,
	}

	frostfsidListSubjectsCmd = &cobra.Command{
		Use:   "list-subjects",
		Short: "List subjects in namespace",
		PreRun: func(cmd *cobra.Command, _ []string) {
			_ = viper.BindPFlag(alphabetWalletsFlag, cmd.Flags().Lookup(alphabetWalletsFlag))
			_ = viper.BindPFlag(endpointFlag, cmd.Flags().Lookup(endpointFlag))
		},
		Run: frostfsidListSubjects,
	}

	frostfsidCreateGroupCmd = &cobra.Command{
		Use:   "create-group",
		Short: "Create group in frostfsid contract",
		PreRun: func(cmd *cobra.Command, _ []string) {
			_ = viper.BindPFlag(alphabetWalletsFlag, cmd.Flags().Lookup(alphabetWalletsFlag))
			_ = viper.BindPFlag(endpointFlag, cmd.Flags().Lookup(endpointFlag))
		},
		Run: frostfsidCreateGroup,
	}

	frostfsidDeleteGroupCmd = &cobra.Command{
		Use:   "delete-group",
		Short: "Delete group from frostfsid contract",
		PreRun: func(cmd *cobra.Command, _ []string) {
			_ = viper.BindPFlag(alphabetWalletsFlag, cmd.Flags().Lookup(alphabetWalletsFlag))
			_ = viper.BindPFlag(endpointFlag, cmd.Flags().Lookup(endpointFlag))
		},
		Run: frostfsidDeleteGroup,
	}

	frostfsidListGroupsCmd = &cobra.Command{
		Use:   "list-groups",
		Short: "List groups in namespace",
		PreRun: func(cmd *cobra.Command, _ []string) {
			_ = viper.BindPFlag(alphabetWalletsFlag, cmd.Flags().Lookup(alphabetWalletsFlag))
			_ = viper.BindPFlag(endpointFlag, cmd.Flags().Lookup(endpointFlag))
		},
		Run: frostfsidListGroups,
	}
)

func initFrostfsIDCreateNamespaceCmd() {
	frostfsidCmd.AddCommand(frostfsidCreateNamespaceCmd)
	frostfsidCreateNamespaceCmd.Flags().StringP(endpointFlag, endpointFlagShort, "", endpointFlagDesc)
	frostfsidCreateNamespaceCmd.Flags().String(namespaceFlag, "", "Namespace name to create")
}

func initFrostfsIDListNamespacesCmd() {
	frostfsidCmd.AddCommand(frostfsidListNamespacesCmd)
	frostfsidListNamespacesCmd.Flags().StringP(endpointFlag, endpointFlagShort, "", endpointFlagDesc)
}

func initFrostfsIDCreateSubjectCmd() {
	frostfsidCmd.AddCommand(frostfsidCreateSubjectCmd)
	frostfsidCreateSubjectCmd.Flags().StringP(endpointFlag, endpointFlagShort, "", endpointFlagDesc)
	frostfsidCreateSubjectCmd.Flags().String(namespaceFlag, "", "Namespace where create subject")
	frostfsidCreateSubjectCmd.Flags().String(subjectNameFlag, "", "Subject name, must be unique in namespace")
	frostfsidCreateSubjectCmd.Flags().String(subjectKeyFlag, "", "Subject hex-encoded public key")
}

func initFrostfsIDDeleteSubjectCmd() {
	frostfsidCmd.AddCommand(frostfsidDeleteSubjectCmd)
	frostfsidDeleteSubjectCmd.Flags().StringP(endpointFlag, endpointFlagShort, "", endpointFlagDesc)
	frostfsidDeleteSubjectCmd.Flags().String(subjectAddressFlag, "", "Subject address")
}

func initFrostfsIDListSubjectsCmd() {
	frostfsidCmd.AddCommand(frostfsidListSubjectsCmd)
	frostfsidListSubjectsCmd.Flags().StringP(endpointFlag, endpointFlagShort, "", endpointFlagDesc)
	frostfsidListSubjectsCmd.Flags().String(namespaceFlag, "", "Namespace to list subjects")
	frostfsidListSubjectsCmd.Flags().Bool(includeNamesFlag, false, "Whether include subject name (require additional requests)")
}

func initFrostfsIDCreateGroupCmd() {
	frostfsidCmd.AddCommand(frostfsidCreateGroupCmd)
	frostfsidCreateGroupCmd.Flags().StringP(endpointFlag, endpointFlagShort, "", endpointFlagDesc)
	frostfsidCreateGroupCmd.Flags().String(namespaceFlag, "", "Namespace where create group")
	frostfsidCreateGroupCmd.Flags().String(groupNameFlag, "", "Group name, must be unique in namespace")
}

func initFrostfsIDDeleteGroupCmd() {
	frostfsidCmd.AddCommand(frostfsidDeleteGroupCmd)
	frostfsidDeleteGroupCmd.Flags().StringP(endpointFlag, endpointFlagShort, "", endpointFlagDesc)
	frostfsidDeleteGroupCmd.Flags().String(namespaceFlag, "", "Namespace to delete group")
	frostfsidDeleteGroupCmd.Flags().Int64(groupIDFlag, 0, "Group id")
}

func initFrostfsIDListGroupsCmd() {
	frostfsidCmd.AddCommand(frostfsidListGroupsCmd)
	frostfsidListGroupsCmd.Flags().StringP(endpointFlag, endpointFlagShort, "", endpointFlagDesc)
	frostfsidListGroupsCmd.Flags().String(namespaceFlag, "", "Namespace to list groups")
}

type ffsidMethodArgs struct {
	name string
	args []any
}

func frostfsidCreateNamespace(cmd *cobra.Command, _ []string) {
	ns, _ := cmd.Flags().GetString(namespaceFlag)

	err := sendFrostfsIDTx(cmd, ffsidMethodArgs{name: "createNamespace", args: []any{ns}})
	commonCmd.ExitOnErr(cmd, "processing error: %w", err)
}

func frostfsidListNamespaces(cmd *cobra.Command, _ []string) {
	ffsid, err := frostfsIDClient(cmd)
	commonCmd.ExitOnErr(cmd, "init contract invoker: %w", err)

	namespaces, err := ffsid.ListNamespaces()
	commonCmd.ExitOnErr(cmd, "list namespaces: %w", err)

	sort.Slice(namespaces, func(i, j int) bool { return namespaces[i].Name < namespaces[j].Name })

	for _, namespace := range namespaces {
		cmd.Printf("%q\n", namespace.Name)
	}
}

func frostfsidCreateSubject(cmd *cobra.Command, _ []string) {
	ns, _ := cmd.Flags().GetString(namespaceFlag)
	subjName, _ := cmd.Flags().GetString(subjectNameFlag)
	subjKey := getFrostfsIDSubjectKey(cmd)

	args := []ffsidMethodArgs{
		{name: "createSubject", args: []any{ns, subjKey.Bytes()}},
	}

	if subjName != "" {
		args = append(args, ffsidMethodArgs{name: "setSubjectName", args: []any{subjKey.GetScriptHash(), subjName}})
	}

	err := sendFrostfsIDTx(cmd, args...)
	commonCmd.ExitOnErr(cmd, "processing error: %w", err)
}

func frostfsidDeleteSubject(cmd *cobra.Command, _ []string) {
	subjectAddress := getFrostfsIDSubjectAddress(cmd)

	err := sendFrostfsIDTx(cmd, ffsidMethodArgs{name: "deleteSubject", args: []any{subjectAddress}})
	commonCmd.ExitOnErr(cmd, "delete subject error: %w", err)
}

func frostfsidListSubjects(cmd *cobra.Command, _ []string) {
	ns, _ := cmd.Flags().GetString(namespaceFlag)
	includeNames, _ := cmd.Flags().GetBool(includeNamesFlag)

	ffsid, err := frostfsIDClient(cmd)
	commonCmd.ExitOnErr(cmd, "init contract invoker: %w", err)

	subAddresses, err := ffsid.ListNamespaceSubjects(ns)
	commonCmd.ExitOnErr(cmd, "list subjects: %w", err)

	sort.Slice(subAddresses, func(i, j int) bool { return subAddresses[i].Less(subAddresses[j]) })

	for _, addr := range subAddresses {
		if !includeNames {
			cmd.Println(address.Uint160ToString(addr))
			continue
		}

		subj, err := ffsid.GetSubject(addr)
		commonCmd.ExitOnErr(cmd, "get subject: %w", err)

		cmd.Printf("%s (%s)\n", address.Uint160ToString(addr), subj.Name)
	}
}

func frostfsidCreateGroup(cmd *cobra.Command, _ []string) {
	ns, _ := cmd.Flags().GetString(namespaceFlag)
	groupName, _ := cmd.Flags().GetString(groupNameFlag)

	ffsid, err := frostfsIDClient(cmd)
	commonCmd.ExitOnErr(cmd, "init contract client: %w", err)

	groupID, err := ffsid.ParseGroupID(ffsid.Wait(ffsid.CreateGroup(ns, groupName)))
	commonCmd.ExitOnErr(cmd, "create group: %w", err)

	cmd.Printf("group '%s' created with id: %d\n", groupName, groupID)
}

func frostfsidDeleteGroup(cmd *cobra.Command, _ []string) {
	ns, _ := cmd.Flags().GetString(namespaceFlag)
	groupID, _ := cmd.Flags().GetInt64(groupIDFlag)

	ffsid, err := frostfsIDClient(cmd)
	commonCmd.ExitOnErr(cmd, "init contract client: %w", err)

	_, err = ffsid.Wait(ffsid.DeleteGroup(ns, groupID))
	commonCmd.ExitOnErr(cmd, "delete group error: %w", err)
}

func frostfsidListGroups(cmd *cobra.Command, _ []string) {
	ns, _ := cmd.Flags().GetString(namespaceFlag)

	ffsid, err := frostfsIDClient(cmd)
	commonCmd.ExitOnErr(cmd, "init contract invoker: %w", err)

	groups, err := ffsid.ListGroups(ns)
	commonCmd.ExitOnErr(cmd, "list groups: %w", err)

	sort.Slice(groups, func(i, j int) bool { return groups[i].Name < groups[j].Name })

	for _, group := range groups {
		cmd.Printf("%q (%d)\n", group.Name, group.ID)
	}
}

func sendFrostfsIDTx(cmd *cobra.Command, methodArgs ...ffsidMethodArgs) error {
	wCtx, err := newInitializeContext(cmd, viper.GetViper())
	if err != nil {
		return fmt.Errorf("can't to initialize context: %w", err)
	}

	r := management.NewReader(wCtx.ReadOnlyInvoker)
	cs, err := r.GetContractByID(1)
	if err != nil {
		return fmt.Errorf("can't get NNS contract info: %w", err)
	}

	ffsidHash, err := nnsResolveHash(wCtx.ReadOnlyInvoker, cs.Hash, domainOf(frostfsIDContract))
	if err != nil {
		return fmt.Errorf("can't get proxy contract hash: %w", err)
	}

	bw := io.NewBufBinWriter()
	for _, method := range methodArgs {
		emit.AppCall(bw.BinWriter, ffsidHash, method.name, callflag.All, method.args...)
	}

	if err = wCtx.sendConsensusTx(bw.Bytes()); err != nil {
		return err
	}

	return wCtx.awaitTx()
}

func frostfsIDClient(cmd *cobra.Command) (*frostfsidclient.Client, error) {
	wCtx, err := newInitializeContext(cmd, viper.GetViper())
	if err != nil {
		return nil, fmt.Errorf("can't to initialize context: %w", err)
	}

	r := management.NewReader(wCtx.ReadOnlyInvoker)
	cs, err := r.GetContractByID(1)
	if err != nil {
		return nil, fmt.Errorf("can't get NNS contract info: %w", err)
	}

	ffsidHash, err := nnsResolveHash(wCtx.ReadOnlyInvoker, cs.Hash, domainOf(frostfsIDContract))
	if err != nil {
		return nil, fmt.Errorf("can't get proxy contract hash: %w", err)
	}

	return frostfsidclient.NewSimple(wCtx.CommitteeAct, ffsidHash), nil
}