package com.example.demo.controller;

import com.example.demo.domain.User;
import com.example.demo.services.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@Controller
@RequestMapping
public class UserController {
    // This means to get the bean called userService
    // Which is auto-generated by Spring, we will use it to handle the data
    @Autowired
    private UserService userService;

    /**
     * Get all the users in the system
     */
    @GetMapping(path = "/list")
    public @ResponseBody String getAllUsers() {
        List<User> users = userService.findAllUsers();
        if (users.isEmpty()) {
            return "No users are presented in the database";
        }
        else {
            return "The following users are presented in the database:\n\n" +
                    userService.getAllUsernames(users).toString();
        }
    }

    /**
     * Get a specific user based on their ID and their roles assigned
     * @param id
     */
    @GetMapping(path = "/get/{id}")
    public @ResponseBody String getUserById(@PathVariable Long id) {
        if (!userService.isExistingUserById(id)) {
            return "There is no user with ID " + id.toString();
        }

        User user = userService.getUser(id);
        return "User details:\n\nName: "+user.getName() + "\nUsername: " + user.getLogin() +
                "\nPassword: " + user.getPassword() + "\nHas following roles: \n" + userService.getUserRoles(id);
    }

    /**
     * Adding a new user
     * @param user
     */
    @PostMapping(path = "/add")
    public @ResponseBody String addUser(@RequestBody User user) {
        userService.saveUser(user);
        return "New user has been saved";
    }

    /**
     * Delete a user
     * @param id
     */
    @DeleteMapping(path = "/delete/{id}")
    public @ResponseBody String deleteUser(@PathVariable("id") Long id) {
        userService.deleteUserById(id);
        return "User having id number " + id.toString() + " has been deleted.";
    }

    /**
     * Edit user's details or add a new user if doesn't exist
     * @param newUser
     * @param id
     */
    @PutMapping(path = "/edit/{id}")
    public @ResponseBody User editUser(@RequestBody User newUser, @PathVariable("id") Long id) {
        return userService.editUser(newUser, id);
    }

}