import { DEFAULT_PATH_WEIGHT, DEFAULT_SUCCESS_RATE, normalizeChunkMetadata } from './types.js';
function coerceDate(value) {
if (value instanceof Date && !Number.isNaN(value.valueOf())) {
return value;
}
if (typeof value === 'string') {
const parsed = new Date(value);
if (!Number.isNaN(parsed.valueOf())) {
return parsed;
}
}
return null;
}
export function touchUsed(chunk, timestamp = new Date()) {
if (!chunk || typeof chunk !== 'object') {
return chunk;
}
const date = coerceDate(timestamp) || new Date();
const iso = date.toISOString();
chunk.last_used_at = iso;
return chunk;
}
export function bumpSuccess(chunk, ok, alpha = 0.2) {
if (!chunk || typeof chunk !== 'object') {
return chunk;
}
const smoothing = typeof alpha === 'number' && alpha > 0 && alpha <= 1 ? alpha : 0.2;
const current = typeof chunk.success_rate === 'number' && Number.isFinite(chunk.success_rate)
? Math.min(1, Math.max(0, chunk.success_rate))
: DEFAULT_SUCCESS_RATE;
const target = ok ? 1 : 0;
const next = current + smoothing * (target - current);
const clamped = Math.min(1, Math.max(0, next));
chunk.success_rate = clamped;
if (typeof chunk.path_weight !== 'number' || !Number.isFinite(chunk.path_weight)) {
chunk.path_weight = DEFAULT_PATH_WEIGHT;
}
if (!Array.isArray(chunk.synonyms)) {
const normalized = normalizeChunkMetadata(chunk);
chunk.synonyms = normalized.synonyms;
}
return chunk;
}
