/**
 * Perplexity AI Research Agent for Transceiver Intelligence Platform
 *
 * Uses Perplexity's Search API to gather real-time market data,
 * pricing, specs, and competitive intelligence for optical transceivers.
 *
 * Usage:
 *   PERPLEXITY_API_KEY=pplx-xxx tsx scripts/perplexity-research.ts [query]
 *
 * Examples:
 *   tsx scripts/perplexity-research.ts "QSFP28 100G LR4 pricing 2026"
 *   tsx scripts/perplexity-research.ts --mode=competitors
 *   tsx scripts/perplexity-research.ts --mode=specs --transceiver="SFP28 25G SR"
 *   tsx scripts/perplexity-research.ts --mode=market-trends
 */

const PERPLEXITY_API_URL = 'https://api.perplexity.ai/chat/completions';
const API_KEY = process.env.PERPLEXITY_API_KEY;

if (!API_KEY) {
  console.error('Error: PERPLEXITY_API_KEY environment variable required');
  console.error('Get your key at: https://console.perplexity.ai');
  process.exit(1);
}

interface PerplexityResponse {
  id: string;
  choices: Array<{
    message: {
      role: string;
      content: string;
    };
    finish_reason: string;
  }>;
  citations?: string[];
}

interface ResearchResult {
  query: string;
  mode: string;
  timestamp: string;
  response: string;
  citations: string[];
}

async function perplexitySearch(query: string, systemPrompt: string): Promise<PerplexityResponse> {
  const response = await fetch(PERPLEXITY_API_URL, {
    method: 'POST',
    headers: {
      'Authorization': `Bearer ${API_KEY}`,
      'Content-Type': 'application/json',
    },
    body: JSON.stringify({
      model: 'sonar-pro',
      messages: [
        { role: 'system', content: systemPrompt },
        { role: 'user', content: query },
      ],
      search_recency_filter: 'month',
      return_citations: true,
    }),
  });

  if (!response.ok) {
    throw new Error(`Perplexity API error: ${response.status} ${response.statusText}`);
  }

  return response.json() as Promise<PerplexityResponse>;
}

const RESEARCH_MODES: Record<string, { systemPrompt: string; queryTemplate: (arg?: string) => string }> = {
  'competitors': {
    systemPrompt: `You are a market research analyst specializing in optical networking equipment.
Focus on: pricing data, market share, product comparisons, vendor landscape.
Always include specific prices, model numbers, and sources.
Cover these competitor categories: OEM vendors (Cisco, Juniper, Arista, Nokia),
compatible/third-party (Flexoptix, ProLabs, AddOn Networks, Fiberstore/FS.com, 10Gtek),
and Chinese manufacturers (HiLink, Gigalight, Source Photonics).`,
    queryTemplate: () => `List the top 60+ optical transceiver vendors worldwide with their:
1. Company name and website
2. Product range (SFP, SFP+, SFP28, QSFP28, QSFP-DD, OSFP)
3. Approximate pricing for popular models
4. Market positioning (OEM, compatible, budget)
5. Any recent news or product launches in 2025-2026`,
  },

  'specs': {
    systemPrompt: `You are an optical networking engineer. Provide detailed technical specifications
for optical transceivers including: form factor, data rate, wavelength, reach, power consumption,
DOM parameters, operating temperature, connector type, fiber type, and MSA compliance.
Always include IEEE/MSA standards references.`,
    queryTemplate: (transceiver?: string) => `Provide complete technical specifications for ${transceiver || 'QSFP28 100G LR4'} transceiver:
- All MSA-compliant specifications
- Typical pricing from different vendors
- Compatible equipment list
- Common failure modes and DOM thresholds
- Comparison with similar transceivers in the same category`,
  },

  'market-trends': {
    systemPrompt: `You are a telecommunications industry analyst focusing on optical networking trends.
Cover: technology adoption curves, pricing trends, new standards (800G, 1.6T),
market size and growth, supply chain dynamics, and emerging technologies (silicon photonics, CPO).`,
    queryTemplate: () => `What are the current optical transceiver market trends for 2025-2026?
Cover these areas:
1. 800G and 1.6T transceiver development status and pricing
2. Silicon photonics adoption in data centers
3. Co-packaged optics (CPO) timeline
4. Supply chain changes post-2024
5. Market size estimates and growth projections
6. Key M&A activity in the optical transceiver space
7. Impact of AI/ML data center buildout on transceiver demand`,
  },

  'pricing': {
    systemPrompt: `You are a procurement specialist for optical networking equipment.
Provide current market pricing with specific vendor quotes where available.
Include: list price, street price, volume pricing tiers, and compatible vs OEM pricing gaps.`,
    queryTemplate: (transceiver?: string) => `Current market pricing for ${transceiver || 'all common optical transceivers'}:
- SFP+ 10G SR/LR
- SFP28 25G SR/LR
- QSFP28 100G SR4/LR4/CWDM4
- QSFP56 200G
- QSFP-DD 400G DR4/FR4
- OSFP 800G
Include prices from: Cisco, Juniper, Arista (OEM) vs Flexoptix, FS.com, ProLabs (compatible)`,
  },

  'standards': {
    systemPrompt: `You are an IEEE/MSA standards expert for optical transceivers.
Cover all relevant standards, their status, and implementation details.`,
    queryTemplate: () => `List all current and upcoming optical transceiver standards:
1. IEEE 802.3 standards (ba, bm, bs, ck, cn, cw, db, df)
2. MSA specifications (SFP, SFP+, SFP28, SFP56, QSFP, QSFP28, QSFP-DD, OSFP)
3. OIF implementations
4. New standards in development for 800G and 1.6T
5. Pluggable vs co-packaged optics standardization efforts`,
  },
};

async function runResearch(mode: string, customQuery?: string, transceiver?: string): Promise<ResearchResult> {
  const config = RESEARCH_MODES[mode];
  if (!config && !customQuery) {
    console.error(`Unknown mode: ${mode}`);
    console.error(`Available modes: ${Object.keys(RESEARCH_MODES).join(', ')}`);
    process.exit(1);
  }

  const query = customQuery || config.queryTemplate(transceiver);
  const systemPrompt = config?.systemPrompt ||
    'You are a research assistant specializing in optical networking and transceivers. Provide detailed, sourced information.';

  console.log(`\n🔍 Perplexity Research: ${mode}`);
  console.log(`   Query: ${query.substring(0, 100)}...`);
  console.log('   Searching...\n');

  const result = await perplexitySearch(query, systemPrompt);
  const content = result.choices[0]?.message?.content || 'No response';
  const citations = result.citations || [];

  const researchResult: ResearchResult = {
    query,
    mode,
    timestamp: new Date().toISOString(),
    response: content,
    citations,
  };

  // Save to file
  const filename = `research-${mode}-${new Date().toISOString().split('T')[0]}.json`;
  const outputPath = `storage/research/${filename}`;

  const { mkdirSync, writeFileSync } = await import('fs');
  mkdirSync('storage/research', { recursive: true });
  writeFileSync(outputPath, JSON.stringify(researchResult, null, 2));

  console.log(content);
  console.log('\n📚 Citations:');
  citations.forEach((c, i) => console.log(`   [${i + 1}] ${c}`));
  console.log(`\n💾 Saved to: ${outputPath}`);

  return researchResult;
}

// Parse CLI arguments
const args = process.argv.slice(2);
let mode = 'market-trends';
let customQuery: string | undefined;
let transceiver: string | undefined;

for (const arg of args) {
  if (arg.startsWith('--mode=')) {
    mode = arg.split('=')[1];
  } else if (arg.startsWith('--transceiver=')) {
    transceiver = arg.split('=').slice(1).join('=');
  } else {
    customQuery = arg;
  }
}

runResearch(mode, customQuery, transceiver).catch(console.error);