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const express = require('express');
const cors = require('cors');
const yahooFinance = require('yahoo-finance2').default;
const fetch = require('node-fetch');

const app = express();
// Constants
const PORT = 7860;
const HOST = '0.0.0.0';

app.use(cors());
app.use(express.json());

app.get('/', (req, res) => {
    res.setHeader('Content-Type', 'text/plain');
    res.end('This is Yahoo finance api \n\nSearch : /api/search/:<symbol/name>\nQuote : /api/quote/:<symbol>\nChart : /api/chart/:<symbol>?interval=<interval>&range=<range>\nSummary : /api/summary/:<symbol>\nAssetProfile : /api/assetprofile/:<symbol>\nBalancesheet : /api/balancesheet/:<symbol>\nCalendar events : /api/calendar/:<symbol>\nCashflow statements : /api/cashflow/:<symbol>');
})

app.get('/api/search/:query', async (req, res) => {
    const query = req.params.query;
    try {
        const results = await yahooFinance.search(query);
        res.json(results);
    } catch (error) {
        res.status(500).json({ message: 'Error searching stocks.' });
    }
});

app.get('/api/quote/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const quote = await yahooFinance.quote(symbol);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching quote data.' });
    }
});

app.get('/api/chart/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    const interval = req.query.interval || '1d';  // Default to 1 day
    const range = req.query.range || '1y';       // Default to 1 year

    try {
        const url = `https://query1.finance.yahoo.com/v8/finance/chart/${symbol}?interval=${interval}&range=${range}`;
        const response = await fetch(url);
        const data = await response.json();

        if (!data.chart.result) {
            return res.status(404).json({ message: `No historical data found for ${symbol}` });
        }

        const timestamps = data.chart.result[0].timestamp;
        const closePrices = data.chart.result[0].indicators.quote[0].close;
        const openPrices = data.chart.result[0].indicators.quote[0].open;
        const highPrices = data.chart.result[0].indicators.quote[0].high;
        const lowPrices = data.chart.result[0].indicators.quote[0].low;
        const adjustClosePrices = data.chart.result[0].indicators.adjclose[0].adjclose;
        const volume = data.chart.result[0].indicators.quote[0].volume;

        const historicalData = timestamps.map((time, index) => ({
            date: new Date(time * 1000).toISOString().slice(0, 10), // Convert timestamp to date format
            open: openPrices[index],
            high: highPrices[index],
            low: lowPrices[index],
            close: closePrices[index],
            adjustclose: adjustClosePrices[index],
            volume: volume[index]
        }));

        res.json(historicalData.reverse());

    } catch (error) {
        console.error(`Error fetching historical data for ${symbol}:`, error);
        res.status(500).json({ message: 'Error fetching historical data.', error: error.message });
    }
});

app.get('/api/summary/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['summaryDetail', 'summaryProfile'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching summary data.' });
    }
})

app.get('/api/assetprofile/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['assetProfile'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching assetProfile data.' });
    }
})

app.get('/api/balancesheet/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['balanceSheetHistory', 'balanceSheetHistoryQuarterly'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching balanceSheet data.' });
    }
})

app.get('/api/calendar/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['calendarEvents'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching calendarEvents data.' });
    }
})

app.get('/api/cashflow/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['cashflowStatementHistory', 'cashflowStatementHistoryQuarterly'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching cashflowstatement data.' });
    }
})

app.get('/api/statistic/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['defaultKeyStatistics'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching statistic data.' });
    }
})

app.get('/api/earnings/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['earnings', 'earningsHistory', 'earningsTrend'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching earnings data.' });
    }
})

app.get('/api/financial/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['financialData'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching financial data.' });
    }
})

app.get('/api/fund/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['fundOwnership', 'fundPerformance', 'fundProfile'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching fund data.' });
    }
})

app.get('/api/income/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['incomeStatementHistory', 'incomeStatementHistoryQuarterly'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching incomestatement data.' });
    }
})

app.get('/api/trend/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['indexTrend', 'industryTrend'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching trend data.' });
    }
})

app.get('/api/insider/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['insiderHolders', 'insiderTransactions', 'institutionOwnership'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching insider data.' });
    }
})

app.get('/api/major/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['topHoldings', 'majorDirectHolders', 'majorHoldersBreakdown'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching majorholders data.' });
    }
})


app.get('/api/netshare/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['netSharePurchaseActivity', 'price'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching netshare data.' });
    }
})

app.get('/api/recommend/:symbol', async (req, res) => {
    const symbol = req.params.symbol;
    try {
        const queryOptions = { modules: ['recommendationTrend'] };
        const quote = await yahooFinance.quoteSummary(symbol, queryOptions);
        res.json(quote);
    } catch (error) {
        res.status(500).json({ message: 'Error fetching recommendationTrend data.' });
    }
})

app.listen(PORT, HOST, () => {
  if (HOST == '0.0.0.0') {
    console.log(`Running on http://127.0.0.1:${PORT}`);
  } else {
    console.log(`Running on http://${HOST}:${PORT}`);
  }

});