#include "MerkelMain.h"
#include <iostream>
#include <vector>
#include "OrderBookEntry.h"
#include "CSVReader.h"
#include <limits>

MerkelMain::MerkelMain()
{
}

void MerkelMain::init()
{
    int input;
    currentTime = orderBook.getEarliestTime();
    while (true)
    {
        printMenu();
        input = getUserOption();
        processUserOption(input);
    }
}

void MerkelMain::printMenu()
{
    // 1 print help
    std::cout << "1: Print help " << std::endl;
    // 2 print exchange stats
    std::cout << "2: Print exchange stats" << std::endl;
    // 3 make an offer
    std::cout << "3: Make an ask " << std::endl;
    // 4 make a bid
    std::cout << "4: Make a bid " << std::endl;
    // 5 print wallet
    std::cout << "5: Print wallet " << std::endl;
    // 6 continue
    std::cout << "6: Continue " << std::endl;
    std::cout << "============== " << std::endl;
    std::cout << "Current time is " << currentTime << std::endl;
}

void MerkelMain::printHelp()
{
    std::cout << "Help - your aim is to make money. Analyse the market and make bids and offers. " << std::endl;
}

void MerkelMain::printMarketStats()
{
    for (std::string const p : orderBook.getKnownProducts())
    {
        std::cout << "Product: " << p << std::endl;
        std::vector<OrderBookEntry> entries = orderBook.getOrders(OrderBookType::ask, p, currentTime);
        std::cout << "Asks for product " << p << " are " << entries.size() << std::endl;
        std::cout << "Max ask for " << p << " is " << orderBook.getHighPrice(entries) << std::endl;
        std::cout << "Min ask for " << p << " is " << orderBook.getLowPrice(entries) << std::endl;
    }
    // std::cout << "OrderBook contains :  " << orders.size() << " entries" << std::endl;
    // unsigned int bids = 0;
    // unsigned int asks = 0;
    // for (OrderBookEntry& e : orders)
    // {
    //     if (e.orderType == OrderBookType::ask)
    //     {
    //         asks ++;
    //     }
    //     if (e.orderType == OrderBookType::bid)
    //     {
    //         bids ++;
    //     }
    // }
    // std::cout << "OrderBook asks:  " << asks << " bids:" << bids << std::endl;
}

void MerkelMain::enterAsk()
{
    std::cout << "Make an ask - enter the amount (product, price, amount. e.g. 'ETH/BTC, 200, 0.5'): " << std::endl;
    std::string input;
    //std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
    std::getline(std::cin, input);

    std::vector<std::string> tokens = CSVReader::tokenise(input, ',');
    if(tokens.size() != 3)
    {
        std::cout << "Bad input!" << input << std::endl;
    }
    else
    {
        try
        {
            OrderBookEntry obe = CSVReader::stringsToOBE(tokens[1], tokens[2], currentTime, tokens[0], OrderBookType::ask);
        }
        catch(const std::exception& e)
        {
            std::cout << "MerkelMain::enterAsk Bad input!" << input << std::endl;
        }
    }
    std::cout << "You typed: " << input << std::endl;
}

void MerkelMain::enterBid()
{
    std::cout << "Make a bid - enter the amount" << std::endl;
}

void MerkelMain::printWallet()
{
    std::cout << "Your wallet is empty. " << std::endl;
}

void MerkelMain::gotoNextTimeframe()
{
    std::cout << "Going to next time frame. " << std::endl;
    currentTime = orderBook.getNextTime(currentTime);
}

int MerkelMain::getUserOption()
{
    int userOption = 0;

    std::string line;
    std::cout << "Type in 1-6" << std::endl;
    std::getline(std::cin, line);
    //std::cin >> userOption;
    try
    {
        userOption = std::stoi(line);
    }
    catch(const std::exception& e)
    {
        std::cout << "Invalid input!" << std::endl;
    }
    std::cout << "You chose: " << userOption << std::endl;
    return userOption;
}

void MerkelMain::processUserOption(int userOption)
{
    if (userOption == 0) // bad input
    {
        std::cout << "Invalid choice. Choose 1-6" << std::endl;
    }
    if (userOption == 1)
    {
        printHelp();
    }
    if (userOption == 2)
    {
        printMarketStats();
    }
    if (userOption == 3)
    {
        enterAsk();
    }
    if (userOption == 4)
    {
        enterBid();
    }
    if (userOption == 5)
    {
        printWallet();
    }
    if (userOption == 6)
    {
        gotoNextTimeframe();
    }
}