// Copyright 2020 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package main

import (
	"context"
	"fmt"
	"net/http"

	"github.com/maruel/subcommands"

	"go.chromium.org/luci/auth"
	"go.chromium.org/luci/auth/client/authcli"
)

type commonFlags struct {
	subcommands.CommandRunBase
	gerritHost    string
	gerritProject string
	authFlags     authcli.Flags

	parsedAuthOpts auth.Options
}

func (c *commonFlags) Init(authOpts auth.Options) {
	c.authFlags = authcli.Flags{}
	c.authFlags.Register(&c.Flags, authOpts)
	c.Flags.StringVar(&c.gerritHost, "gerrit-host", "", "Gerrit host to use.")
	c.Flags.StringVar(&c.gerritProject, "gerrit-project", "", "Gerrit project to use.")
}

func (c *commonFlags) Parse() error {
	var err error
	c.parsedAuthOpts, err = c.authFlags.Options()
	if err != nil {
		return err
	}
	if c.gerritHost == "" {
		return fmt.Errorf("-gerrit-host is required")
	}
	if c.gerritProject == "" {
		return fmt.Errorf("-gerrit-project is required")
	}
	return nil
}

// newAuthClient returns an authenticated *http.Client.
func newAuthClient(ctx context.Context, authOpts auth.Options) (*http.Client, error) {
	return auth.NewAuthenticator(ctx, auth.OptionalLogin, authOpts).Client()
}