import fs from "node:fs";
import path from "node:path";
export type AppConfig = {
pdfDir: string; // directory containing source PDFs
indexDir: string; // directory root for built indexes
autoIndex: boolean; // scan and build missing/stale indexes on startup
watch: boolean; // watch pdfDir for changes and auto-index
};
const defaults: AppConfig = {
pdfDir: "data",
indexDir: "data/index",
autoIndex: true,
watch: true,
};
export function loadConfig(cwd: string = process.cwd()): AppConfig {
let cfg: Partial<AppConfig> = {};
const file = path.resolve(cwd, "config.json");
if (fs.existsSync(file)) {
try {
cfg = JSON.parse(fs.readFileSync(file, "utf8"));
} catch (e) {
console.warn(`Failed to parse config.json: ${e}`);
}
}
const merged: AppConfig = { ...defaults, ...(cfg as AppConfig) } as AppConfig;
if (process.env.PDF_DIR) merged.pdfDir = process.env.PDF_DIR;
if (process.env.INDEX_DIR) merged.indexDir = process.env.INDEX_DIR;
if (process.env.AUTO_INDEX != null) merged.autoIndex = process.env.AUTO_INDEX !== "0";
if (process.env.WATCH_INDEX != null) merged.watch = process.env.WATCH_INDEX !== "0";
// Normalize to absolute paths
merged.pdfDir = path.resolve(cwd, merged.pdfDir);
merged.indexDir = path.resolve(cwd, merged.indexDir);
return merged;
}
