using Backend.Data;
using Backend.Models;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;


namespace Backend.Controllers
{

    [ApiController]
    [Route("api/[controller]")]
    public class UsersController : ControllerBase
    {
        private readonly ApplicationDbContext _context;

        public UsersController(ApplicationDbContext context)
        {
            _context = context;
        }

        [HttpGet]
        public async Task<ActionResult<IEnumerable<User>>> GetUsers()
        {
            var users = await _context.Users.ToListAsync();
            return Ok(users);
        }

        [HttpGet("{id}")]
        public async Task<ActionResult<User>> GetUser(int id)
        {
            var user = await _context.Users.FindAsync(id);

            if(user == null)
            {
                return NotFound();
            }

            return Ok(user);
        }

        [HttpPost]
        public async Task<ActionResult<User>> PostUser(User user)
        {
            if (user == null)
            {
                return BadRequest("User data is required");
            }

            try
            {
                _context.Users.Add(user);
                await _context.SaveChangesAsync();

                return CreatedAtAction("GetUser", new {id = user.Id }, user);
            }
            catch (Exception ex)
            {
                return StatusCode(500, "En error occured while creatint user. Try again later");
            }
        }

        [HttpPut("{id}")]
        public async Task<IActionResult> PutUser(int id, User user)
        {
            if (id != user.Id)
            {
                return BadRequest();
            }

            _context.Entry(user).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!UserExists(id))
                {
                    return NotFound();
                }
                else
                {
                    throw;
                }
            }
            return NoContent();
        }

        private bool UserExists(int id)
        {
            return _context.Users.Any(e => e.Id == id);
        }

    }

}