using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
using BlueWest.Data;
using BlueWest.WebApi.EF;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;

namespace BlueWest.WebApi.Controllers
{
    /// <summary>
    /// Api Controller for handling users data
    /// </summary>
    [ApiController]
    [Route("[controller]")]
    public class UserController : ControllerBase
    {

        private readonly UserDbContext _dbContext;

        /// <summary>
        /// Controller responsible to handle user data
        /// </summary>
        /// <param name="dbContext"></param>
        public UserController(UserDbContext dbContext)
        {
            _dbContext = dbContext;
        }
        
                
        /// <summary>
        /// Gets all the users in the user table12312
        /// </summary>
        /// <returns></returns>
        [ProducesResponseType(StatusCodes.Status200OK)]
        [HttpGet]
        public ActionResult Get()
        {
            var users = _dbContext.Users.ToArray();
            return Ok(users);

        }

        /// <summary>
        /// Get User by Id
        /// </summary>
        /// <param name="userId"></param>
        /// <returns></returns>
        
        [ProducesResponseType(StatusCodes.Status200OK)]
        [ProducesResponseType(StatusCodes.Status404NotFound)]
        [HttpGet("{userId}", Name = nameof(GetUserById))]
        public ActionResult GetUserById(int userId)
        {
            var user = _dbContext.Users.FirstOrDefault(x => x.Id == userId);

            if (user != null)
            {
                return Ok(user);
            }
            
            return new NotFoundResult();
        }
        

        /// <summary>
        /// Adds a user to the database
        /// </summary>
        /// <param name="userCreate">User to add </param>
        /// <returns></returns>
        [ProducesResponseType(StatusCodes.Status201Created)]
        [HttpPost]
        public ActionResult AddUser(UserCreate userCreate)
        {
            var user = new User(userCreate);
            _dbContext.Users.Add(user);
            _dbContext.SaveChanges();
            return CreatedAtRoute(nameof(GetUserById),  new {userId = user.Id}, user);
        }        
        
        /// <summary>
        /// Updates user data
        /// </summary>
        /// <param name="userId">User id</param>
        /// <param name="userCreate"></param>
        /// <returns></returns>
        [ProducesResponseType(StatusCodes.Status200OK)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        [HttpPut($"{{userId:int}}")]
        public ActionResult UpdateUser(int userId, UserCreate userCreate)
        {

            return new NotFoundResult();
        }
        
        /// <summary>
        /// Deletes a user from the database
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        [ProducesResponseType(StatusCodes.Status204NoContent)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        [HttpDelete("{id:int}")]
        public ActionResult DeleteUser(int id)
        {
            var user = _dbContext.Users.FirstOrDefault(u => u.Id == id);
            if (user == null)
            {
                return new NotFoundResult();
            }
            _dbContext.Users.Remove(user);
            _dbContext.SaveChanges();
            return Ok();
        }
        

    }
}