/**
 * Tiny namespace + level logger for the API layer.
 *
 * Default level is `info` — matches the historical "log heavily" behavior of the
 * fat services. Set `VITE_LOG_LEVEL=warn` (or `error` / `debug` / `silent`) in
 * `.env` / `.env.local` to tune without rebuilding.
 *
 * Usage:
 *   import logger from '@/api/logger'
 *   logger.info('students loaded', count)
 *   logger.error('request failed', error)
 *
 *   import { child } from '@/api/logger'
 *   const log = child('taskService')
 *   log.debug('fetching page', page)
 */

const LEVELS = { debug: 10, info: 20, warn: 30, error: 40, silent: 99 }

const envLevel =
  (typeof import.meta !== 'undefined' && import.meta.env && import.meta.env.VITE_LOG_LEVEL) ||
  'info'

const threshold = LEVELS[envLevel] ?? LEVELS.info

function fmt(ns, level, args) {
  const ts = new Date().toISOString().slice(11, 23)
  return [`[${ts}] [${level.toUpperCase()}] [${ns}]`, ...args]
}

function makeLogger(ns) {
  return {
    debug: (...args) => {
      if (LEVELS.debug >= threshold) console.debug(...fmt(ns, 'debug', args))
    },
    info: (...args) => {
      if (LEVELS.info >= threshold) console.info(...fmt(ns, 'info', args))
    },
    warn: (...args) => {
      if (LEVELS.warn >= threshold) console.warn(...fmt(ns, 'warn', args))
    },
    error: (...args) => {
      if (LEVELS.error >= threshold) console.error(...fmt(ns, 'error', args))
    },
  }
}

export function child(ns) {
  return makeLogger(ns)
}

export default makeLogger('api')