package ru.ulstu.aspirant.controller;

import org.springframework.data.domain.Page;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import ru.ulstu.aspirant.model.Report;
import ru.ulstu.aspirant.service.AspirantService;
import ru.ulstu.indicator.model.Indicator;
import ru.ulstu.model.OffsetablePageRequest;

import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

@Controller
@RequestMapping("aspirant")
public class AspirantController {
    private static final Integer DEFAULT_PAGE_SIZE = 1;
    private static final Integer DEFAULT_PAGE_NUMBER = 1;
    private final AspirantService aspirantService;

    public AspirantController(AspirantService aspirantService) {
        this.aspirantService = aspirantService;
    }

    @GetMapping("aspirantReport")
    public String createReport(Model model,
                               @RequestParam Optional<Integer> page,
                               @RequestParam Optional<Integer> size) {
        int currentPage = page.orElse(DEFAULT_PAGE_NUMBER);
        int pageSize = size.orElse(DEFAULT_PAGE_SIZE);

        Page<Indicator> indicators = aspirantService.getIndicatorsByCourse(new OffsetablePageRequest(currentPage - 1, pageSize));
        model.addAttribute("indicators", indicators);
        int totalPages = indicators.getTotalPages();
        if (totalPages > 0) {
            List<Integer> pageNumbers = IntStream.rangeClosed(1, totalPages)
                    .boxed()
                    .collect(Collectors.toList());
            model.addAttribute("pageNumbers", pageNumbers);
        }

        model.addAttribute("report", new Report());
        return "aspirant/editReport";
    }
}