#!/usr/bin/env node
/**
 * monitor.js — Token Monitor entrypoint
 *
 * Probes all configured LLM API providers, extracts rate-limit/quota headers,
 * and outputs a human-readable summary or JSON.
 *
 * Usage:
 *   node monitor.js                        # human-readable summary + log
 *   node monitor.js --json                 # JSON to stdout + log
 *   node monitor.js --summary              # human-readable only (no log)
 *   node monitor.js --provider team-nadja  # single provider
 *   node monitor.js --no-log               # suppress log file
 */

import { getProviders } from './providers/index.js';
import { probeTeamsProvider } from './providers/anthropic-teams.js';
import { getApiAteamStatus } from './providers/anthropic-api.js';
import { probeShelleyProxy } from './providers/shelley-proxy.js';
import { probeGeminiProvider } from './providers/gemini.js';
import { probeXaiProvider } from './providers/xai.js';
import { generateReport, getSeverity } from './report.js';
import { logRun } from './logger.js';

const args = process.argv.slice(2);
const isJson = args.includes('--json');
const isSummaryOnly = args.includes('--summary');
const noLog = args.includes('--no-log');
const filterIdx = args.indexOf('--provider');
const filterProvider = filterIdx !== -1 ? args[filterIdx + 1] : null;

/**
 * Probe a single provider and return normalized result.
 */
async function probeProvider(p) {
  const start = Date.now();
  let result;

  if (p.type === 'teams-direct') {
    result = await probeTeamsProvider(p.name, p.baseUrl, p.apiKey);
  } else if (p.type === 'shelley-proxy') {
    result = await probeShelleyProxy(p.name, p.baseUrl);
  } else if (p.type === 'api-direct') {
    result = getApiAteamStatus();
  } else if (p.type === 'gemini-api') {
    result = await probeGeminiProvider(p.name, p.baseUrl, p.apiKey);
  } else if (p.type === 'xai-api') {
    result = await probeXaiProvider(p.name, p.baseUrl, p.apiKey);
  } else {
    result = { type: 'unknown', status: 'skipped', severity: 'unknown' };
  }

  result.probe_latency_ms = Date.now() - start;
  if (!result.severity) {
    result.severity = getSeverity(result);
  }
  return result;
}

async function main() {
  // Cache guard — return last logged run if within 20 minutes (skip on --summary, --no-log, --provider filter)
  if (!noLog && !filterProvider && !isSummaryOnly) {
    const { getCachedRun } = await import('./logger.js');
    const cached = getCachedRun(20);
    if (cached) {
      if (isJson) {
        console.log(JSON.stringify(cached, null, 2));
      } else {
        console.log(generateReport(cached));
      }
      return;
    }
  }

  const allProviders = getProviders();
  const providerNames = filterProvider
    ? [filterProvider]
    : Object.keys(allProviders);

  if (filterProvider && !allProviders[filterProvider]) {
    console.error(
      `Unknown provider: ${filterProvider}. Available: ${Object.keys(allProviders).join(', ')}`
    );
    process.exit(1);
  }

  const results = {};
  for (const name of providerNames) {
    const p = allProviders[name];
    results[name] = await probeProvider(p);
  }

  const output = {
    timestamp: new Date().toISOString(),
    providers: results,
  };

  if (isJson) {
    console.log(JSON.stringify(output, null, 2));
  } else {
    console.log(generateReport(output));
  }

  // Log to file unless --summary or --no-log
  if (!isSummaryOnly && !noLog) {
    logRun(output);
  }
}

main().catch((err) => {
  console.error('Fatal:', err.message);
  process.exit(1);
});