import { fromEnv as loadAppConfig, type AppConfig as LegacyAppConfig } from "./schema.js";
export type AppConfig = {
apiToken?: string;
defaultTeamId?: number;
primaryLanguage?: string;
baseUrl?: string;
requestTimeoutMs?: number;
defaultHeadersJson?: string;
};
function toOptionalString(value: unknown): string | undefined {
if (typeof value !== "string") {
return undefined;
}
const trimmed = value.trim();
return trimmed.length > 0 ? trimmed : undefined;
}
function toOptionalNumber(value: unknown): number | undefined {
if (typeof value !== "number") {
return undefined;
}
// Defensive: normalize invalid numbers (NaN, Infinity) to undefined
if (!Number.isFinite(value)) {
return undefined;
}
return value;
}
function fromLegacy(config: LegacyAppConfig): AppConfig {
const result: AppConfig = {};
const apiToken = toOptionalString(config.apiToken);
if (apiToken) {
result.apiToken = apiToken;
}
const defaultTeamId = toOptionalNumber(config.defaultTeamId);
if (defaultTeamId !== undefined) {
result.defaultTeamId = defaultTeamId;
}
const primaryLanguage = toOptionalString(config.primaryLanguage);
if (primaryLanguage) {
result.primaryLanguage = primaryLanguage;
}
const baseUrl = toOptionalString(config.baseUrl);
if (baseUrl) {
result.baseUrl = baseUrl;
}
const requestTimeoutMs = toOptionalNumber(config.requestTimeoutMs);
if (requestTimeoutMs !== undefined) {
result.requestTimeoutMs = requestTimeoutMs;
}
const defaultHeadersJson = toOptionalString(config.defaultHeadersJson);
if (defaultHeadersJson) {
result.defaultHeadersJson = defaultHeadersJson;
}
return result;
}
export function mergeConfig(input: Partial<AppConfig>): AppConfig {
const envDefaults = fromLegacy(loadAppConfig());
const merged: AppConfig = { ...envDefaults };
// Defensive: handle all input types safely, normalize invalid values to undefined
const apiToken = toOptionalString(input?.apiToken);
if (apiToken !== undefined) {
merged.apiToken = apiToken;
}
const defaultTeamId = toOptionalNumber(input?.defaultTeamId);
if (defaultTeamId !== undefined) {
merged.defaultTeamId = defaultTeamId;
}
const primaryLanguage = toOptionalString(input?.primaryLanguage);
if (primaryLanguage !== undefined) {
merged.primaryLanguage = primaryLanguage;
}
const baseUrl = toOptionalString(input?.baseUrl);
if (baseUrl !== undefined) {
merged.baseUrl = baseUrl;
}
const requestTimeoutMs = toOptionalNumber(input?.requestTimeoutMs);
if (requestTimeoutMs !== undefined) {
merged.requestTimeoutMs = requestTimeoutMs;
}
const defaultHeadersJson = toOptionalString(input?.defaultHeadersJson);
if (defaultHeadersJson !== undefined) {
merged.defaultHeadersJson = defaultHeadersJson;
}
return merged;
}
export function validateConfig(cfg: AppConfig): { ok: true } | { ok: false; message: string } {
// Defensive: never fail validation, matching Python MCP behavior.
// Invalid values are normalized during merge/conversion instead.
return { ok: true };
}
