// Copyright © 2018 Mikael Berthe <mikael@lilotux.net>

//

// Licensed under the MIT license.

// Please see the LICENSE file is this directory.

package cmd

import (

	"os"

	"github.com/pkg/errors"

	"github.com/spf13/cobra"

	"github.com/McKael/madon/v2"

)

var listsOpts struct {

	accountIDs string

	title      string

	// Used for several subcommands to limit the number of results

	limit, keep uint

	all         bool

}

//listsCmd represents the lists command

var listsCmd = &cobra.Command{

	Use:     "lists",

	Aliases: []string{"list"},

	Short:   "Manage lists",

	Example: `  madonctl lists create --title "Friends"

  madonctl lists show

  madonctl lists show --list-id 3

  madonctl lists update --list-id 3 --title "Family"

  madonctl lists delete --list-id 3

  madonctl lists accounts --list-id 2

  madonctl lists add-accounts --list-id 2 --account-ids 123,456

  madonctl lists remove-accounts --list-id 2 --account-ids 456

  madonctl lists show --account-id 123`,

}

func init() {

	RootCmd.AddCommand(listsCmd)

	// Subcommands

	listsCmd.AddCommand(listsSubcommands...)

	listsCmd.PersistentFlags().UintVarP(&listsOpts.limit, "limit", "l", 0, "Limit number of API results")

	listsCmd.PersistentFlags().UintVarP(&listsOpts.keep, "keep", "k", 0, "Limit number of results")

	listsCmd.PersistentFlags().BoolVar(&listsOpts.all, "all", false, "Fetch all results")

	// XXX accountUID?

	listsCreateSubcommand.Flags().StringVar(&listsOpts.title, "title", "", "List title")

	listsUpdateSubcommand.Flags().StringVar(&listsOpts.title, "title", "", "List title")

	listsAddAccountsSubcommand.Flags().StringVar(&listsOpts.accountIDs, "account-ids", "", "Comma-separated list of account IDs")

	listsRemoveAccountsSubcommand.Flags().StringVar(&listsOpts.accountIDs, "account-ids", "", "Comma-separated list of account IDs")

}

var listsSubcommands = []*cobra.Command{

	listsGetSubcommand,

	listsCreateSubcommand,

	listsUpdateSubcommand,

	listsDeleteSubcommand,

	listsGetAccountsSubcommand,

	listsAddAccountsSubcommand,

	listsRemoveAccountsSubcommand,

}

var listsGetSubcommand = &cobra.Command{

	Use:   "show",

	Short: "Display one or several lists",

	// TODO Long: ``,

	Aliases: []string{"get", "display", "ls"},

	RunE:    listsGetRunE,

}

var listsGetAccountsSubcommand = &cobra.Command{

	Use:   "accounts --list-id N",

	Short: "Display a list's accounts",

	RunE:  listsGetAccountsRunE,

}

var listsCreateSubcommand = &cobra.Command{

	Use:   "create --title TITLE",

	Short: "Create a list",

	RunE:  listsSetDeleteRunE,

}

var listsUpdateSubcommand = &cobra.Command{

	Use:   "update --list-id N --title TITLE",

	Short: "Update a list",

	RunE:  listsSetDeleteRunE,

}

var listsDeleteSubcommand = &cobra.Command{

	Use:     "delete --list-id N",

	Short:   "Delete a list",

	Aliases: []string{"rm", "del"},

	RunE:    listsSetDeleteRunE,

}

var listsAddAccountsSubcommand = &cobra.Command{

	Use:     "add-accounts --list-id N --account-ids ACC1,ACC2...",

	Short:   "Add one or several accounts to a list",

	Aliases: []string{"add-account"},

	RunE:    listsAddRemoveAccountsRunE,

}

var listsRemoveAccountsSubcommand = &cobra.Command{

	Use:     "remove-accounts --list-id N --account-ids ACC1,ACC2...",

	Short:   "Remove one or several accounts from a list",

	Aliases: []string{"remove-account"},

	RunE:    listsAddRemoveAccountsRunE,

}

func listsGetRunE(cmd *cobra.Command, args []string) error {

	opt := listsOpts

	// Log in

	if err := madonInit(true); err != nil {

		return err

	}

	// Set up LimitParams

	var limOpts *madon.LimitParams

	if opt.all || opt.limit > 0 {

		limOpts = new(madon.LimitParams)

		limOpts.All = opt.all

	}

	if opt.limit > 0 {

		limOpts.Limit = int(opt.limit)

	}

	var obj interface{}

	var err error

		var list *madon.List

		list, err = gClient.GetList(opt.listID)

		obj = list

	} else {

		var lists []madon.List

		lists, err = gClient.GetLists(opt.accountID, limOpts)

		if opt.keep > 0 && len(lists) > int(opt.keep) {

			lists = lists[:opt.keep]

		}

		obj = lists

	}

	if err != nil {

		errPrint("Error: %s", err.Error())

		os.Exit(1)

	}

	if obj == nil {

		return nil

	}

	p, err := getPrinter()

	if err != nil {

		errPrint("Error: %v", err)

		os.Exit(1)

	}

	return p.printObj(obj)

}

func listsGetAccountsRunE(cmd *cobra.Command, args []string) error {

	opt := listsOpts

		return errors.New("missing list ID")

	}

	// Log in

	if err := madonInit(true); err != nil {

		return err

	}

	// Set up LimitParams

	var limOpts *madon.LimitParams

	if opt.all || opt.limit > 0 {

		limOpts = new(madon.LimitParams)

		limOpts.All = opt.all

	}

	if opt.limit > 0 {

		limOpts.Limit = int(opt.limit)

	}

	var obj interface{}

	var err error

	var accounts []madon.Account

	accounts, err = gClient.GetListAccounts(opt.listID, limOpts)

	if opt.keep > 0 && len(accounts) > int(opt.keep) {

		accounts = accounts[:opt.keep]

	}

	obj = accounts

	if err != nil {

		errPrint("Error: %s", err.Error())

		os.Exit(1)

	}

	if obj == nil {

		return nil

	}

	p, err := getPrinter()

	if err != nil {

		errPrint("Error: %v", err)

		os.Exit(1)

	}

	return p.printObj(obj)

}

func listsSetDeleteRunE(cmd *cobra.Command, args []string) error {

	const (

		actionUnknown = iota

		actionCreate

		actionUpdate

		actionDelete

	)

	var action int

	opt := listsOpts

	switch cmd.Name() {

	case "create":

			return errors.New("list ID should not be provided with create")

		}

		action = actionCreate

	case "update":

			return errors.New("list ID is required")

		}

		action = actionUpdate

	case "delete", "rm", "del":

		action = actionDelete

	}

	// Additionnal checks

	if action == actionUnknown {

		// Shouldn't happen.  If it does, might be an unrecognized alias.

		return errors.New("listsSetDeleteRunE: internal error")

	}

	if action != actionDelete && opt.title == "" {

		return errors.New("the list title is required")

	}

	// Log in

	if err := madonInit(true); err != nil {

		return err

	}

	var obj interface{}

	var err error

	var list *madon.List

	switch action {

	case actionCreate:

		list, err = gClient.CreateList(opt.title)

		obj = list

	case actionUpdate:

		list, err = gClient.UpdateList(opt.listID, opt.title)

		obj = list

	case actionDelete:

		err = gClient.DeleteList(opt.listID)

		obj = nil

	}

	if err != nil {

		errPrint("Error: %s", err.Error())

		os.Exit(1)

	}

	if obj == nil {

		return nil

	}

	p, err := getPrinter()

	if err != nil {

		errPrint("Error: %v", err)

		os.Exit(1)

	}

	return p.printObj(obj)

}

func listsAddRemoveAccountsRunE(cmd *cobra.Command, args []string) error {

	opt := listsOpts

		return errors.New("missing list ID")

	}

	var err error

	ids, err = splitIDs(opt.accountIDs)

	if err != nil {

		return errors.New("cannot parse account IDs")

	}

	}

	if len(ids) < 1 {

		return errors.New("missing account IDs")

	}

	// Log in

	if err := madonInit(true); err != nil {

		return err

	}

	switch cmd.Name() {

	case "add-account", "add-accounts":

		err = gClient.AddListAccounts(opt.listID, ids)

	case "remove-account", "remove-accounts":

		err = gClient.RemoveListAccounts(opt.listID, ids)

	default:

		// Shouldn't happen.  If it does, might be an unrecognized alias.

		return errors.New("listsAddRemoveAccountsRunE: internal error")

	}

	if err != nil {

		errPrint("Error: %s", err.Error())

		os.Exit(1)

	}

	return nil

}