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from tools.python import cipd_deps


def go_bin_path(input_api):
    return input_api.os_path.join(input_api.change.RepositoryRoot(),
                                  'tools', 'golang',
                                  cipd_deps.get_cipd_platform(), 'bin')


def go_path(input_api):
    go = input_api.os_path.join(go_bin_path(input_api), 'go')
    if input_api.is_windows:
        go += '.exe'

    return go


def gofmt_path(input_api):
    gofmt = input_api.os_path.join(go_bin_path(input_api), 'gofmt')
    if input_api.is_windows:
        gofmt += '.exe'
    return gofmt


def RunGoTests(input_api, output_api):
    results = []
    try:
        input_api.subprocess.check_call_out(
            [go_path(input_api), 'test', './...'],
            stdout=input_api.subprocess.PIPE,
            stderr=input_api.subprocess.PIPE,
            cwd=input_api.PresubmitLocalPath())
    except input_api.subprocess.CalledProcessError as e:
        results.append(output_api.PresubmitError('%s' % (e, )))
    return results


def EnforceGoFormatting(path, input_api, output_api):
    errors = []
    try:
        stdout, _ = input_api.subprocess.check_call_out(
            [gofmt_path(input_api), '-l', path],
            stdout=input_api.subprocess.PIPE,
            stderr=input_api.subprocess.STDOUT,
            cwd=input_api.PresubmitLocalPath(),
            text=True)
        stdout = stdout.strip()
        if stdout:
            full_path = input_api.os_path.join(input_api.PresubmitLocalPath(),
                                               path)
            errors.append(
                output_api.PresubmitError(
                    'Go code in %s is not formatted, please run "gofmt -w %s"'
                    % (path, full_path)))
    except input_api.subprocess.CalledProcessError as e:
        errors.append(output_api.PresubmitError('EnforceGoFormatting: %s' % e))
    return errors