import process from 'node:process';

import { z } from 'zod';

const DEFAULT_BASE_URL = 'http://172.16.74.149:5666';

const EnvSchema = z.object({
  FINANCE_API_BASE_URL: z.string().trim().optional(),
  FINANCE_API_KEY: z.string().trim().optional(),
  FINANCE_API_TIMEOUT: z.string().trim().optional(),
  FINANCE_BASIC_USERNAME: z.string().optional(),
  FINANCE_BASIC_PASSWORD: z.string().optional(),
  FINANCE_BASIC_USER: z.string().optional(),
  FINANCE_USERNAME: z.string().optional(),
  FINANCE_PASSWORD: z.string().optional(),
  FINANCE_MCP_MAX_CONCURRENCY: z.string().trim().optional(),
});

const parsed = EnvSchema.parse(process.env);

const baseUrl =
  parsed.FINANCE_API_BASE_URL && parsed.FINANCE_API_BASE_URL.length > 0
    ? parsed.FINANCE_API_BASE_URL
    : DEFAULT_BASE_URL;

const timeoutMs = parsed.FINANCE_API_TIMEOUT
  ? Number.parseInt(parsed.FINANCE_API_TIMEOUT, 10)
  : undefined;

const maxConcurrencyRaw = parsed.FINANCE_MCP_MAX_CONCURRENCY
  ? Number.parseInt(parsed.FINANCE_MCP_MAX_CONCURRENCY, 10)
  : undefined;

const maxConcurrency =
  Number.isFinite(maxConcurrencyRaw ?? Number.NaN) &&
  (maxConcurrencyRaw ?? 0) > 0
    ? (maxConcurrencyRaw as number)
    : 4;

const username =
  parsed.FINANCE_BASIC_USERNAME ??
  parsed.FINANCE_BASIC_USER ??
  parsed.FINANCE_USERNAME ??
  null;
const password =
  parsed.FINANCE_BASIC_PASSWORD ?? parsed.FINANCE_PASSWORD ?? null;

export const config = {
  baseUrl,
  apiKey: parsed.FINANCE_API_KEY,
  timeoutMs:
    Number.isFinite(timeoutMs ?? Number.NaN) && (timeoutMs ?? 0) > 0
      ? (timeoutMs as number)
      : undefined,
  maxConcurrency,
  basicAuth: username && password ? { username, password } : undefined,
};