#include "cmdline.h"
#include "printdata.h"
#include "stock.h"

#include <mysql++.h>

#include <iostream>

#include <math.h>


// Define a functor for testing primality.
struct is_prime
{
    bool operator()(const stock& s)
    {
        if ((s.num == 2) || (s.num == 3)) {
            return true;    // 2 and 3 are trivial cases
        }
        else if ((s.num < 2) || ((s.num % 2) == 0)) {
            return false;   // can't be prime if < 2 or even
        }
        else {
            // The only possibility left is that it's divisible by an
            // odd number that's less than or equal to its square root.
            for (int i = 3; i <= sqrt(double(s.num)); i += 2) {
                if ((s.num % i) == 0) {
                    return false;
                }
            }
            return true;
        }
    }
};


int
main(int argc, char *argv[])
{
    // Get database access parameters from command line
    mysqlpp::examples::CommandLine cmdline(argc, argv);
    if (!cmdline) {
        return 1;
    }

    try {
        // Establish the connection to the database server.
        mysqlpp::Connection con(mysqlpp::examples::db_name,
                cmdline.server(), cmdline.user(), cmdline.pass());

        // Collect the stock items with prime quantities
        std::vector<stock> results;
        mysqlpp::Query query = con.query();
        query.store_if(results, stock(), is_prime());

        // Show the results
        print_stock_header(results.size());
        std::vector<stock>::const_iterator it;
        for (it = results.begin(); it != results.end(); ++it) {
            print_stock_row(it->item.c_str(), it->num, it->weight,
                    it->price, it->sDate);
        }
    }
    catch (const mysqlpp::BadQuery& e) {
        // Something went wrong with the SQL query.
        std::cerr << "Query failed: " << e.what() << std::endl;
        return 1;
    }
    catch (const mysqlpp::Exception& er) {
        // Catch-all for any other MySQL++ exceptions
        std::cerr << "Error: " << er.what() << std::endl;
        return 1;
    }

    return 0;
}