import { debug, warning } from "@actions/core";

import { valid } from "semver";

const DEFAULT_VERSION_FEATURE_FLAG_PREFIX = "default_codeql_version_";

const DEFAULT_VERSION_FEATURE_FLAG_SUFFIX = "_enabled";

function getCliVersionFromFeatureFlag(f: string): string | undefined {

if (

!f.startsWith(DEFAULT_VERSION_FEATURE_FLAG_PREFIX) ||

!f.endsWith(DEFAULT_VERSION_FEATURE_FLAG_SUFFIX)

) {

return undefined;

}

const version = f

.substring(

DEFAULT_VERSION_FEATURE_FLAG_PREFIX.length,

f.length - DEFAULT_VERSION_FEATURE_FLAG_SUFFIX.length,

)

.replace(/_/g, ".");

if (!valid(version)) {

warning(

`Ignoring feature flag ${f} as it does not specify a valid CodeQL version.`,

);

return undefined;

}

return version;

}

export function getDefaultCliVersion(

features: Record<string, boolean>,

): string | undefined {

const enabledFeatureFlagCliVersions = Object.entries(features)

.map(([f, isEnabled]) =>

isEnabled ? getCliVersionFromFeatureFlag(f) : undefined,

)

.filter((f): f is string => f !== undefined);

if (enabledFeatureFlagCliVersions.length === 0) {

return undefined;

}

const maxCliVersion = enabledFeatureFlagCliVersions.reduce(

(maxVersion, currentVersion) =>

currentVersion > maxVersion ? currentVersion : maxVersion,

enabledFeatureFlagCliVersions[0],

);

debug(`Derived default CLI version of ${maxCliVersion} from feature flags.`);

return maxCliVersion;

}