// 2020 Rackspace, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License"): you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations
// under the License.

package migrate

import (
	"fmt"
	"log"
	"os"

	"github.rackspace.com/gorax/clients/migrationAPI"

	"github.com/jedib0t/go-pretty/table"
	"github.com/sirupsen/logrus"

	"github.com/jokelyo/argparse"
	"github.rackspace.com/DCM/gomigrate/core"
	"github.rackspace.com/DCM/gomigrate/shared"
	"github.rackspace.com/gorax/gokeys"
)

type (
	result struct {
		ID        int
		MoveGroup string
		Result    *migrationAPI.MigrateVlansResponse
	}
)

func fromTranslationsPlugin(p *argparse.Command) core.Plugin {
	cmd := p.NewCommand("translations", "migrate VLAN translations in DCX Environment Manager")

	argXlateDevices = shared.ArgDevices(cmd)
	argXlateMG = shared.ArgMoveGroup(cmd)

	return core.Plugin{CMD: cmd, Func: migrateTranslations}
}

// migrateTranslations will prompt for a list of device, then run DCX migrate
// translations for each device
func migrateTranslations(cfg gokeys.Settings) {
	// Pull an Identity token from the users gokeys keychain
	iKey, err := cfg.Identity(false)
	if err != nil {
		log.Fatal(err)
	}

	// Pull a core token from the users gokeys keychain
	coreKey, err := cfg.Core(false)
	if err != nil {
		log.Fatal(err)
	}

	mgList := make(map[string][]int)
	if *argXlateMG != "" {
		devices, err := shared.MongoDevices([]string{*argXlateMG}, nil, nil, "", coreKey.Password, nil)
		if err != nil {
			log.Fatalf("error retrieving devices for move group: %s", err)
		}
		logrus.Infof("%s: found %d devices", *argXlateMG, len(devices))
		mgList[*argXlateMG] = make([]int, 0)
		for _, d := range devices {
			mgList[*argXlateMG] = append(mgList[*argXlateMG], d.ID)
		}
	} else {
		devices, err := shared.MongoDevices(nil, nil, *argXlateDevices, "", coreKey.Password, nil)
		if err != nil {
			log.Fatalf("error retrieving devices: %s", err)
		}
		for _, d := range devices {
			if _, ok := mgList[d.MoveGroup]; !ok {
				mgList[d.MoveGroup] = make([]int, 0)
			}
			mgList[d.MoveGroup] = append(mgList[d.MoveGroup], d.ID)
		}
	}

	m := migrationAPI.New(iKey.Password, false)
	// change this to use migrateVlans method
	for mg, devices := range mgList {
		for _, d := range devices {
			r := result{
				ID:        d,
				MoveGroup: mg,
				Result:    new(migrationAPI.MigrateVlansResponse),
			}
			r.Result, err = m.MigrateVlans(mg, d)
			if err != nil {
				errString := err.Error()
				r.Result = &migrationAPI.MigrateVlansResponse{
					Error: &errString,
				}
			}
			pPrint(r)
		}
	}
}

func pPrint(r result) {
	t := table.NewWriter()
	t.SetOutputMirror(os.Stdout)

	t.AppendRow(table.Row{fmt.Sprintf("%d - %s", r.ID, r.MoveGroup)})
	if r.Result.Error != nil {
		header := "Error"
		if *r.Result.Error == "environment vlans already migrated" {
			header = "Info"
		}
		t.AppendRow(table.Row{fmt.Sprintf("%s: %s", header, *r.Result.Error)})
	} else if r.Result.Data != nil {
		out := "VLANs Migrated:\n"
		for _, v := range r.Result.Data.VlansMigrated {
			out += fmt.Sprintf("\t%s:Vlan%s\n", v.SourceZone, v.SourceVlan)
		}
		out += "\nVLANs Not Migrated:\n"
		for _, v := range r.Result.Data.VlansNotMigrated {
			out += fmt.Sprintf("\t%s:Vlan%s\n", v.SourceZone, v.SourceVlan)
		}
		t.AppendRow(table.Row{out})
	}

	t.SetStyle(table.StyleLight)
	t.Style().Options.SeparateRows = true
	t.Render()
}