import crypto from 'crypto';

const BASE = 'https://web3.okx.com';

// Signature rule:
//   GET  → body = "", requestPath includes query string (e.g., "/api/v6/dex/market/token/search?chains=1&search=PEPE")
//   POST → body = JSON string of request body, requestPath is path only (e.g., "/api/v6/dex/market/price-info")
async function okxFetch(method: 'GET' | 'POST', path: string, body?: object) {
  const timestamp = new Date().toISOString();
  const bodyStr = body ? JSON.stringify(body) : '';
  const sign = crypto
    .createHmac('sha256', process.env.OKX_SECRET_KEY!)
    .update(timestamp + method + path + bodyStr)
    .digest('base64');
  const headers: Record<string, string> = {
    'OK-ACCESS-KEY': process.env.OKX_API_KEY!,
    'OK-ACCESS-SIGN': sign,
    'OK-ACCESS-PASSPHRASE': process.env.OKX_PASSPHRASE!,
    'OK-ACCESS-TIMESTAMP': timestamp,
    'Content-Type': 'application/json',
  };
  const res = await fetch(`${BASE}${path}`, {
    method,
    headers,
    ...(body && { body: bodyStr }),
  });
  if (res.status === 429) throw { code: 'RATE_LIMITED', msg: 'Rate limited — retry with backoff', retryable: true };
  if (res.status >= 500) throw { code: `HTTP_${res.status}`, msg: 'Server error', retryable: true };
  const json = await res.json();
  if (json.code !== '0') throw { code: json.code, msg: json.msg || 'API error', retryable: false };
  return json.data;
}

// Search token (GET)
const tokens = await okxFetch('GET', '/api/v6/dex/market/token/search?' + new URLSearchParams({
  chains: '1,501', search: 'PEPE',
}));
// → tokens[].tokenContractAddress, price, communityRecognized

// Get detailed price info (POST — body is JSON array)
const path = '/api/v6/dex/market/price-info';
const prices = await okxFetch('POST', path, [
  { chainIndex: '1', tokenContractAddress: '0x6982508145454ce325ddbe47a25d4ec3d2311933' },
]);
// → prices[].price, marketCap, liquidity, volume24H, priceChange24H

1. okx-dex-token   /market/token/search?search=BONK&chains=501             → get tokenContractAddress, chainIndex, price, communityRecognized
       ↓ tokenContractAddress + chainIndex
2. okx-dex-token   /market/price-info                                       → market cap, liquidity, volume24H, priceChange24H, holders
3. okx-dex-token   /market/token/holder                                     → top 20 holders distribution
4. okx-dex-market  /market/candles?bar=1H                                   → hourly price chart
       ↓ user decides to buy
5. okx-wallet-portfolio /balance/all-token-balances-by-address                   → verify wallet has enough SOL
6. okx-dex-swap    /aggregator/quote → /aggregator/swap-instruction → execute

1. okx-dex-token   /market/token/toplist?chains=501&sortBy=5&timeFrame=4               → top tokens by 24h volume
       ↓ user picks a token
2. okx-dex-token   /market/price-info                                                   → detailed analytics
3. okx-dex-token   /market/token/holder                                                 → check if whale-dominated
4. okx-dex-market  /market/candles                                                      → K-line for visual trend
       ↓ user decides to trade
5. okx-dex-swap    → execute

1. okx-dex-token   /market/token/search                                     → find token
2. Check communityRecognized:
   - true → proceed with normal caution
   - false → warn user about risk
3. okx-dex-token   /market/price-info → check liquidity:
   - liquidity < $10K → warn about high slippage risk
   - liquidity < $1K → strongly discourage trade
4. okx-dex-swap    /aggregator/quote → check isHoneyPot and taxRate
5. If all checks pass → proceed to swap

{
  "code": "0",
  "data": [{ "chainIndex": "501", "decimal": "6", "tokenName": "michi", "tokenSymbol": "$michi",
    "tokenContractAddress": "5mbK36SZ...", "tagList": { "communityRecognized": true } }],
  "msg": ""
}

GET /api/v6/dex/market/token/search?chains=1&search=PEPE
-> Display:
  PEPE (0x6982...) - Ethereum
  Price: $0.0000XX | 24h: +X% | Market Cap: $X.XB | Liquidity: $XXM
  Community Recognized: Yes

POST /api/v6/dex/market/token/basic-info
Body: [
  { "chainIndex": "1", "tokenContractAddress": "0xaaa..." },
  { "chainIndex": "1", "tokenContractAddress": "0xbbb..." },
  { "chainIndex": "56", "tokenContractAddress": "0xccc..." }
]
-> Returns name, symbol, decimals, community status for each

GET /api/v6/dex/market/token/toplist?chains=501&sortBy=5&timeFrame=4
-> Display top tokens sorted by 24h volume:
  #1 SOL  - Vol: $1.2B | Change: +3.5% | MC: $80B
  #2 BONK - Vol: $450M | Change: +12.8% | MC: $1.5B
  ...