#!/usr/bin/env python
import argparse
import os
import re
import sys
from subprocess import check_call

vendored_libbeat = os.path.normpath("vendor/github.com/elastic/beats")


goversion_template = '''package main

const appVersion = "{version}"
'''

goversion_template_libbeat = '''package version

const defaultBeatVersion = "{version}"
'''


yamlversion_template = '''version: "{version}"
'''

def get_rootfolder():
    vendored_libbeat = os.path.normpath("vendor/github.com/elastic/beats")
    script_directory = os.path.abspath(os.path.dirname(os.path.realpath(__file__)))
    index = script_directory.find(vendored_libbeat)
    if index > 0:
        # Community beat detected, version files are stored at the root folder of the project
        return os.path.abspath(script_directory[:index])

    # Libbeat detected
    return os.path.dirname(script_directory)

def create_from_template(filename, template, version):
    with open(filename, "w") as f:
        f.write(template.format(version=version))
        print ("Set version {} in file {}".format(version, filename))

def main():
    parser = argparse.ArgumentParser(
        description="Used to set the current version. Doesn't commit changes.")
    parser.add_argument("version",
                        help="The new version")
    args = parser.parse_args()
    version = args.version

    is_libbeat = vendored_libbeat not in os.path.realpath(__file__)
    if is_libbeat:
        goversion_filepath  = os.path.join(get_rootfolder(), "libbeat", "version", "version.go")
        ymlversion_filepath = os.path.join(get_rootfolder(), "dev-tools", "packer", "version.yml")
        go_template = goversion_template_libbeat
    else:
        goversion_filepath  = os.path.join(get_rootfolder(), "version.go")
        ymlversion_filepath = os.path.join(get_rootfolder(), "version.yml")
        go_template = goversion_template

    # Create version.go and version.yml files
    create_from_template(goversion_filepath, go_template, version)
    create_from_template(ymlversion_filepath, yamlversion_template, version)

    # Updates all version files with the new templates
    os.chdir(get_rootfolder())
    print("Update build files")
    check_call("make update", shell=True)

if __name__ == "__main__":
    main()