/*
Copyright 2022 The Fission Authors.

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 token

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"os"

	fv1 "github.com/fission/fission/pkg/apis/core/v1"
	"github.com/fission/fission/pkg/fission-cli/cliwrapper/cli"
	"github.com/fission/fission/pkg/fission-cli/cmd"
	"github.com/fission/fission/pkg/fission-cli/console"
	flagkey "github.com/fission/fission/pkg/fission-cli/flag/key"
	"github.com/fission/fission/pkg/fission-cli/util"
)

type CreateSubCommand struct {
	cmd.CommandActioner
}

func Create(input cli.Input) error {
	return (&CreateSubCommand{}).do(input)
}

func (opts *CreateSubCommand) do(input cli.Input) error {
	return opts.run(input)
}

func (opts *CreateSubCommand) run(input cli.Input) error {

	lb := &fv1.AuthLogin{}

	username := input.String(flagkey.TokUsername)
	if len(username) != 0 {
		lb.Username = username
	}

	password := input.String(flagkey.TokPassword)
	if len(password) != 0 {
		lb.Password = password
	}

	values := map[string]string{"username": username, "password": password}

	jsonValue, _ := json.Marshal(values)

	authURI, _ := os.LookupEnv("FISSION_AUTH_URI")
	if input.IsSet(flagkey.TokAuthURI) {
		authURI = input.String(flagkey.TokAuthURI)
	}
	if len(authURI) == 0 {
		authURI = util.FISSION_AUTH_URI
	}
	routerURL, err := util.GetRouterURL(input.Context(), opts.Client())
	if err != nil {
		return fmt.Errorf("error getting router URL: %w", err)
	}
	authAuthenticatorUrl := routerURL.JoinPath(authURI)
	console.Verbose(2, "Auth URI: %s", authAuthenticatorUrl.String())
	resp, err := http.Post(authAuthenticatorUrl.String(), "application/json", bytes.NewBuffer(jsonValue))
	if err != nil {
		return err
	}

	defer resp.Body.Close()

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return fmt.Errorf("error creating token: %w", err)
	}

	if resp.StatusCode == http.StatusCreated {
		var rat fv1.RouterAuthToken
		err = json.Unmarshal(body, &rat)
		if err != nil {
			return err
		}
		fmt.Println(rat.AccessToken)
	} else if resp.StatusCode == http.StatusNotFound {
		fmt.Printf("%s. Please check if authentication is enabled and correct auth URI is mentioned via --authuri or FISSION_AUTH_URI.\n", resp.Status)
	} else {
		fmt.Println(resp.Status)
	}

	return nil
}