// Copyright 2019 Google LLC
//
// 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 gapicgen provides some helpers for gapicgen binaries.
package gapicgen

import (
	"fmt"
	"os"
	"os/exec"
)

// SetGitCreds sets credentials for gerrit.
func SetGitCreds(githubName, githubEmail, gerritCookieName, gerritCookieValue string) error {
	c := exec.Command("git", "config", "--global", "user.name", githubName)
	c.Stdout = os.Stdout
	c.Stderr = os.Stderr
	c.Stdin = os.Stdin // Prevents "the input device is not a TTY" error.
	c.Env = []string{
		fmt.Sprintf("PATH=%s", os.Getenv("PATH")), // TODO(deklerk): Why do we need to do this? Doesn't seem to be necessary in other exec.Commands.
		fmt.Sprintf("HOME=%s", os.Getenv("HOME")), // TODO(deklerk): Why do we need to do this? Doesn't seem to be necessary in other exec.Commands.
	}
	if err := c.Run(); err != nil {
		return err
	}

	c = exec.Command("git", "config", "--global", "user.email", githubEmail)
	c.Stdout = os.Stdout
	c.Stderr = os.Stderr
	c.Stdin = os.Stdin // Prevents "the input device is not a TTY" error.
	c.Env = []string{
		fmt.Sprintf("PATH=%s", os.Getenv("PATH")), // TODO(deklerk): Why do we need to do this? Doesn't seem to be necessary in other exec.Commands.
		fmt.Sprintf("HOME=%s", os.Getenv("HOME")), // TODO(deklerk): Why do we need to do this? Doesn't seem to be necessary in other exec.Commands.
	}
	if err := c.Run(); err != nil {
		return err
	}

	cmd := fmt.Sprintf(`
set -ex

eval 'set +o history' 2>/dev/null || setopt HIST_IGNORE_SPACE 2>/dev/null
touch ~/.gitcookies
chmod 0600 ~/.gitcookies

git config --global http.cookiefile ~/.gitcookies

tr , \\t <<\__END__ >>~/.gitcookies
code.googlesource.com,FALSE,/,TRUE,2147483647,%s,%s
code-review.googlesource.com,FALSE,/,TRUE,2147483647,%s,%s
__END__
eval 'set -o history' 2>/dev/null || unsetopt HIST_IGNORE_SPACE 2>/dev/null
`, gerritCookieName, gerritCookieValue, gerritCookieName, gerritCookieValue)
	c = exec.Command("/bin/bash", "-c", cmd)
	c.Stdout = os.Stdout
	c.Stderr = os.Stderr
	c.Stdin = os.Stdin // Prevents "the input device is not a TTY" error.
	c.Env = []string{
		fmt.Sprintf("PATH=%s", os.Getenv("PATH")), // TODO(deklerk): Why do we need to do this? Doesn't seem to be necessary in other exec.Commands.
		fmt.Sprintf("HOME=%s", os.Getenv("HOME")), // TODO(deklerk): Why do we need to do this? Doesn't seem to be necessary in other exec.Commands.
	}
	return c.Run()
}