package com.example.demo;

import java.util.Set;

import javax.validation.ConstraintViolation;
import javax.validation.Valid;
import javax.validation.Validator;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class ValidationController {

	@Autowired
	Validator validator;

	@RequestMapping(value = "/validate", method = RequestMethod.GET)
	public String validateBook(Model model) {

		Book book = new Book();
		book.setTitle("Test");
		book.setRating(20);
		book.setAuthor(" ");

		Set<ConstraintViolation<Book>> constViol = validator.validate(book);

		model.addAttribute("violation", constViol);

		return "collection";
	}

	@RequestMapping(value = "/validBook", method = RequestMethod.GET)
	public String checkBook(Model model) {
		model.addAttribute("book", new Book());
		return "validateBook";
	}

	@RequestMapping(value = "/validBook", method = RequestMethod.POST)
	public String checkValidBook(@Valid Book book, BindingResult binding) {
		if(binding.hasErrors()) {
			return "validateBook";
		} else {
			// add to db / update
			return "success";
		}
	}
}