import path from "node:path";

export interface AppConfig {
  basePath: string;
  baseUrl: string;
  port: number;
  dataDir: string;
  htmlDir: string;
  screenshotDir: string;
  cacheDir: string;
  dbPath: string;
  adminToken: string;
  captureTimeoutMs: number;
  maxScreenshotHeight: number;
}

function intEnv(name: string, fallback: number): number {
  const raw = process.env[name];
  if (!raw) return fallback;
  const parsed = Number.parseInt(raw, 10);
  return Number.isFinite(parsed) ? parsed : fallback;
}

const dataDir = process.env.AISHARE_DATA_DIR || path.resolve("data");

export const config: AppConfig = {
  basePath: "/aishare",
  baseUrl: (process.env.AISHARE_BASE_URL || "http://127.0.0.1:8088/aishare").replace(/\/$/, ""),
  port: intEnv("AISHARE_PORT", 8080),
  dataDir,
  htmlDir: path.join(dataDir, "html"),
  screenshotDir: path.join(dataDir, "screenshots"),
  cacheDir: path.join(dataDir, "cache"),
  dbPath: path.join(dataDir, "aishare.db"),
  adminToken: process.env.AISHARE_ADMIN_TOKEN || "",
  captureTimeoutMs: intEnv("AISHARE_CAPTURE_TIMEOUT_MS", 180_000),
  maxScreenshotHeight: intEnv("AISHARE_MAX_SCREENSHOT_HEIGHT", 60_000)
};