package ca.sheridancollege.servlets;

import ca.sheridancollege.beans.Book;
import ca.sheridancollege.database.DatabaseAccess;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet(name = "buyBooksServlet", urlPatterns = {"/buyBooksServlet"})
public class buyBooksServlet extends HttpServlet {

    public HttpServletRequest requestNew;
    public HttpServletResponse responseNew;
    //database access
    public DatabaseAccess database = new DatabaseAccess();

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        try (PrintWriter out = response.getWriter()) {
        }
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        //setting request and response values into public variables
        requestNew = request;
        responseNew = response;

        //campus data
        String campus = request.getParameter("campus");

        //setting attributes for campus
        switch (campus) {
            case "davisBooks":
                request.setAttribute("campus", "Davis Book Store");
                break;
            case "hmcBooks":
                request.setAttribute("campus", "HMC Book Store");
                break;
            default:
                request.setAttribute("campus", "Trafalgar Book Store");
                break;
        }

        //Books
        exists(database.getBook(Integer.parseInt(request.getParameter("id1")), campus), campus, Integer.parseInt(request.getParameter("amount1")), "1");
        exists(database.getBook(Integer.parseInt(request.getParameter("id2")), campus), campus, Integer.parseInt(request.getParameter("amount2")), "2");
        exists(database.getBook(Integer.parseInt(request.getParameter("id3")), campus), campus, Integer.parseInt(request.getParameter("amount3")), "3");
        exists(database.getBook(Integer.parseInt(request.getParameter("id4")), campus), campus, Integer.parseInt(request.getParameter("amount4")), "4");
        exists(database.getBook(Integer.parseInt(request.getParameter("id5")), campus), campus, Integer.parseInt(request.getParameter("amount5")), "5");
        //sending to jsp
        RequestDispatcher view = requestNew.getRequestDispatcher("boughtBook.jsp");
        view.forward(requestNew, responseNew);
    }

    //gets an input book object
    public void exists(Book inputBook, String campus, int orderAmount, String bookNum) throws ServletException, IOException {

        //error chcecking
        if (inputBook.getId() == 0) {
            //record doesnt exist
            RequestDispatcher view = requestNew.getRequestDispatcher("recordDoesntExist.jsp");
            view.forward(requestNew, responseNew);
            processRequest(requestNew, responseNew);
        } else if (inputBook.getQuantity() < orderAmount) {
            //not enough in the sotre to finish order
            RequestDispatcher view = requestNew.getRequestDispatcher("amountTooBig.jsp");
            view.forward(requestNew, responseNew);
        } else {
            inputBook.setQuantity(inputBook.getQuantity() - orderAmount);
            database.editRecord(inputBook.getId(), campus, inputBook.getName(), inputBook.getAuthor(), inputBook.getPrice(), inputBook.getQuantity(), inputBook.getRelatedCourses());
            double totalPrice = orderAmount * inputBook.getPrice();

            //setting atttributes
            requestNew.setAttribute("buyingBook" + bookNum, inputBook);
            requestNew.setAttribute("amount" + bookNum, orderAmount);
            requestNew.setAttribute("price" + bookNum, totalPrice);

        }

//        return false;
    }

    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>

}