export type JobRef = { id?: string; name: string };

type DraftLookup = { name: string; rkey?: string; migration?: { status: string; jobId?: string } };

export const createJobMatcher = <T extends { id: number; name: string }>(
	repos: readonly T[],
	drafts: Record<number, DraftLookup>
): ((job: JobRef) => T | undefined) => {
	const byJobId = new Map<string, T>();
	const byDraft = new Map<string, T>();
	const byName = new Map<string, T>();
	const claim = (map: Map<string, T>, key: string | undefined, repo: T) => {
		if (key !== undefined && !map.has(key)) map.set(key, repo);
	};
	for (const repo of repos) {
		const draft = drafts[repo.id];
		const m = draft?.migration;
		if (m?.status === "success") claim(byJobId, m.jobId, repo);
		if (draft) {
			claim(byDraft, draft.name.toLowerCase(), repo);
			claim(byDraft, draft.rkey?.toLowerCase(), repo);
		}
		claim(byName, repo.name.toLowerCase(), repo);
	}
	return (job) => {
		const jobName = job.name.toLowerCase();
		return (
			(job.id ? byJobId.get(job.id) : undefined) ??
			byDraft.get(jobName) ??
			byName.get(jobName)
		);
	};
};