package edu.brown.cs.student;

import edu.brown.cs.student.term.DatabaseQuerier;
import edu.brown.cs.student.term.hub.Holder;
import edu.brown.cs.student.term.hub.HubSearch;
import edu.brown.cs.student.term.hub.LinkMapper;
import edu.brown.cs.student.term.profit.ProfitCalculation;
import edu.brown.cs.student.term.profit.StockHolding;
import edu.brown.cs.student.term.repl.commands.SetupCommand;
import edu.brown.cs.student.term.trade.Trade;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import java.time.LocalDate;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.sql.Date;
import java.time.Instant;
import java.util.Map;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

public class ProfitCalculationTest {

  /**
   * these should span the entire mock dataset
   */
  //12 am on 3/11 in UTC
  private Instant start = Instant.parse("2021-03-11T05:00:00.00Z");
  //12 am on 3/28 in UTC
  private Instant end = Instant.parse("2021-03-28T05:00:00.00Z");

  private DatabaseQuerier db;

  @Before
  public void setUp() {
    try {
      db = new DatabaseQuerier("data/profit_testing.sqlite3");
    } catch (Exception e) {
      System.out.println("DBQuerier Test, couldn't connect to db???");
    }
  }

  @After
  public void tearDown() {
    db = null;
  }

  @Test
  public void testBasicTrades() {
    setUp();
    ProfitCalculation profitCalculation =
        new ProfitCalculation(DatabaseQuerier.getConn(), "Don", new Date(1518010558000l),
            new Date(1618698807000l));
    //price of GME at end time is 154.69
    List<StockHolding> trade = profitCalculation.getHoldingsList();
    //buy with no sell
    assertEquals(trade.get(0).getUnrealizedGain(), 3842.25, .25);
    assertEquals(trade.get(0).getRealizedGain(), 0, .01);

    //just sell
    profitCalculation =
        new ProfitCalculation(DatabaseQuerier.getConn(), "SELL", new Date(1518010558000l),
            new Date(1618698807000l));
    trade = profitCalculation.getHoldingsList();
    assertTrue(trade.isEmpty());
    assertEquals(profitCalculation.calculateGains(), 0, 0.001);

    tearDown();
  }

  @Test
  public void otherBuySellCases() {
    setUp();
    //buy and sell at same timestamp
    ProfitCalculation profitCalculation =
        new ProfitCalculation(DatabaseQuerier.getConn(), "concurrentBS", new Date(1518010558000l),
            new Date(1715629591000l));

    assertEquals(profitCalculation.getProfitMap().get(100), 1, .01);

    //buys at multiple prices
    profitCalculation =
        new ProfitCalculation(DatabaseQuerier.getConn(), "mulitpleBuyPrices",
            new Date(1518010558000l),
            new Date(1715629591000l));
    assertEquals(profitCalculation.getProfitMap().get(101), 1, .01);
    assertEquals(profitCalculation.getMoneyInput(), 3750, .01);
    assertEquals(profitCalculation.getHoldingsList().get(0).getRealizedGain(), 3750, 0.01);

    //left over holdings
    profitCalculation =
        new ProfitCalculation(DatabaseQuerier.getConn(), "dontSellAll",
            new Date(1518010558000l),
            new Date(1715629591000l));

    assertEquals(profitCalculation.getHoldingsList().get(0).getShares(), 25, .01);
    tearDown();
  }

  @Test
  public void testAPICalls() {
    ProfitCalculation profitCalculation =
        new ProfitCalculation(DatabaseQuerier.getConn(), "Don", new Date(1618234200000l),
            new Date(1618703800000l));

    //check sp500 calculation. 411.28 to 417.30
    assertEquals(profitCalculation.compareToSP500(), .01464, .001);

    tearDown();

  }

  @Test
  public void databaseAndConnectionIssues() {
    //no database connection
    ProfitCalculation profitCalculation =
        new ProfitCalculation(null, "Don", new Date(1518010558000l),
            new Date(1618698807000l));
    assertEquals(profitCalculation.getProfitMap(), new HashMap<>());

    assertEquals(profitCalculation.getHoldingsList(), new LinkedList<>());

    setUp();
    //invalid person
    profitCalculation =
        new ProfitCalculation(DatabaseQuerier.getConn(), "1234", new Date(1518010558000l),
            new Date(1618698807000l));
    assertEquals(profitCalculation.getHoldingsList(), new LinkedList<>());


    //invalid stock ticker
    profitCalculation =
        new ProfitCalculation(DatabaseQuerier.getConn(), "invalidTicker", new Date(1518010558000l),
            new Date(1618698807000l));
    assertEquals(profitCalculation.getHoldingsList().get(0).getRealizedGain(), 0, .01);
    assertEquals(profitCalculation.getHoldingsList().get(0).getUnrealizedGain(), 0, .01);
  }


}