import { i18n } from "$lib/i18n";

/** Message key for a processing job status (machine code → i18n). */
export function jobStatusMessageKey(status: string | null | undefined): string {
	const s = (status ?? "").toLowerCase().trim();
	if (s === "running" || s === "processing") return "status.processing";
	if (s === "completed" || s === "success" || s === "done") return "status.completed";
	if (s === "failed" || s === "error") return "status.failed";
	if (s === "cancelled" || s === "canceled") return "status.cancelled";
	if (s === "pending" || s === "queued") return "processing.jobStatus.queued";
	if (s === "skipped") return "processing.jobStatus.skipped";
	return "processing.jobStatus.unknown";
}

/** Localized label for a processing job status code (Queued for pending). */
export function formatJobStatusLabel(status: string | null | undefined): string {
	const key = jobStatusMessageKey(status);
	const label = i18n.t(key);
	if (label !== key) return label;
	const raw = (status ?? "").trim();
	return raw || i18n.t("processing.jobStatus.unknown");
}

/** True while a processing job should appear in the global progress indicator. */
export function isActiveProcessingJob(status: string | null | undefined): boolean {
	const s = (status ?? "").toLowerCase().trim();
	return s === "pending" || s === "queued" || s === "running" || s === "processing";
}

/** Dashboard prefers shared "Pending" wording for queued jobs. */
export function formatJobStatusLabelPending(status: string | null | undefined): string {
	const s = (status ?? "").toLowerCase().trim();
	if (s === "pending" || s === "queued") {
		return i18n.t("status.pending");
	}
	const label = formatJobStatusLabel(status);
	if (!status?.trim()) return i18n.t("status.emDash");
	return label;
}

const JOB_ERR_KEYS = new Set([
	"processing.job.error.all_failed",
	"processing.job.error.partial_failed"
]);

/**
 * Localize pipeline job.error values.
 * Accepts keyed payloads from FormatJobUserError (`key|count=N`) and legacy English prose.
 */
export function formatJobErrorText(raw: string | null | undefined): string {
	const text = (raw ?? "").trim();
	if (!text) return "";
	const cut = text.indexOf("|count=");
	if (cut > 0) {
		const key = text.slice(0, cut).trim();
		const countRaw = text.slice(cut + "|count=".length).trim();
		const count = Number(countRaw);
		if (JOB_ERR_KEYS.has(key) && Number.isFinite(count)) {
			return i18n.t(key, { count });
		}
	}
	return text;
}

/** Localized pipeline step name. */
export function formatJobStepLabel(step: string | null | undefined): string {
	const s = (step ?? "").trim();
	switch (s) {
		case "normalize":
			return i18n.t("processing.step.normalize");
		case "parse_specs":
			return i18n.t("processing.step.parse_specs");
		case "fill_fields":
			return i18n.t("processing.step.fill_fields");
		case "eprel":
			return i18n.t("processing.step.eprel");
		case "ai_enhance":
			return i18n.t("processing.step.ai_enhance");
		default:
			return s || i18n.t("processing.jobStatus.unknown");
	}
}

/** Message key for a processing_type / job.type code. */
export function processingTypeMessageKey(type: string | null | undefined): string | null {
	const s = (type ?? "").toLowerCase().trim().replaceAll("-", "_");
	if (!s) return null;
	switch (s) {
		case "full":
			return "processing.type.full";
		case "enhance":
		case "enhance_only":
			return "processing.type.enhance_only";
		case "title":
			return "processing.type.title";
		case "description":
			return "processing.type.description";
		case "attributes":
			return "processing.type.attributes";
		case "category":
			return "processing.type.category";
		case "eprel":
		case "eprel_only":
			return "processing.type.eprel";
		case "seo":
		case "seo_ai":
			return "processing.type.seo";
		case "normalize":
		case "normalize_only":
			return "processing.type.normalize";
		default:
			return null;
	}
}

/** Localized processing job type (never show snake_case API codes when keyed). */
export function formatProcessingTypeLabel(type: string | null | undefined): string {
	const key = processingTypeMessageKey(type);
	if (key) {
		const label = i18n.t(key);
		if (label !== key) return label;
	}
	const raw = (type ?? "").trim();
	if (!raw) return i18n.t("processing.jobStatus.unknown");
	return raw.replaceAll("_", " ");
}