/*
 * Copyright (C) 2021 Anton Romanov - All Rights Reserved
 * You may use, distribute and modify this code, please write to: romanov73@gmail.com.
 *
 */

package ru.ulstu.meeting;

import org.springframework.data.domain.Page;
import org.springframework.security.access.annotation.Secured;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import ru.ulstu.model.OffsetablePageRequest;
import ru.ulstu.model.UserRoleConstants;

import javax.validation.Valid;
import java.util.List;
import java.util.Optional;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

@Controller
@RequestMapping("meetings")
public class MeetingController {
    private final static int DEFAULT_PAGE_SIZE = 10;
    private final MeetingService meetingService;

    public MeetingController(MeetingService meetingService) {
        this.meetingService = meetingService;
    }

    @GetMapping("/meetings")
    public String listMeetings(Model model,
                               @RequestParam Optional<Integer> page,
                               @RequestParam Optional<Integer> size) {
        int currentPage = page.orElse(1);
        int pageSize = size.orElse(DEFAULT_PAGE_SIZE);

        Page<Meeting> meetingsPage = meetingService.getMeetings(new OffsetablePageRequest(currentPage - 1, pageSize));
        model.addAttribute("meetings", meetingsPage);
        int totalPages = meetingsPage.getTotalPages();
        if (totalPages > 0) {
            List<Integer> pageNumbers = IntStream.rangeClosed(1, totalPages)
                    .boxed()
                    .collect(Collectors.toList());
            model.addAttribute("pageNumbers", pageNumbers);
        }
        return "meetings";
    }

    @GetMapping("/editMeeting/{meetingId}")
    @Secured({UserRoleConstants.ADMIN})
    public String editMeeting(@PathVariable(value = "meetingId") Integer id, Model model) {
        model.addAttribute("meeting", (id != null && id != 0) ? meetingService.getById(id) : new Meeting());
        return "editMeeting";
    }

    @GetMapping("/meetings/{meetingId}")
    public String viewMeeting(@PathVariable(value = "meetingId") Integer id, Model model) {
        model.addAttribute("meeting", id != null ? meetingService.getById(id) : new Meeting());
        return "viewMeeting";
    }

    @PostMapping("saveMeeting")
    @Secured({UserRoleConstants.ADMIN})
    public String saveNews(@Valid @ModelAttribute Meeting meeting, BindingResult result) {
        if (result.hasErrors()) {
            return "editMeeting";
        }
        meetingService.save(meeting);
        return "redirect:/meetings/meetings";
    }

    @GetMapping("deleteMeeting/{meetingId}")
    @Secured({UserRoleConstants.ADMIN})
    public String delete(@PathVariable(value = "meetingId") Integer id) {
        meetingService.delete(id);
        return "redirect:/meetings/meetings";
    }
}