using System;
using System.Collections.Immutable;
using BlueWest.Collections;
using BlueWest.Data;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using PerformanceSolution.Data;

namespace BlueWest.WebApi.Controllers
{
    [ApiController]
    [Route("[controller]")]
    public class UserController : ControllerBase
    {
        private UserList _userList => MemoryData.UserList;

        [ProducesResponseType(StatusCodes.Status200OK)]
        [HttpGet]
        public ActionResult Get()
        {
            if (_userList != null)
            {
                return Ok(_userList.Users.Values.ToImmutableArray());
            }

            return new NotFoundResult();
        }
        
        
        [ProducesResponseType(StatusCodes.Status200OK)]
        [ProducesResponseType(StatusCodes.Status404NotFound)]
        [HttpGet("{userId}", Name = nameof(GetUserById))]
        public ActionResult GetUserById(int userId)
        {
           var user = MemoryData.GetUserById(userId);
            
            if (user.Id != TimeSpan.Zero)
            {
                return Ok(user);
            }

            return new NotFoundResult();
        }
        
        
        [ProducesResponseType(StatusCodes.Status200OK)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        [HttpGet("{userId}/transactions")]
        public ActionResult GetTransactions(int userId)
        {
            var transactions = MemoryData.GetUserTransactions(userId);
            return Ok(transactions);
        }
                       
        
        [ProducesResponseType(StatusCodes.Status200OK)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        [HttpGet("{userId}/transactions/{transactionId}")]
        public ActionResult GetTransactionsById(int userId, TimeSpan transactionId)
        {
            var user = MemoryData.UserList.GetUserById(userId);
           
            if(user.Id == TimeSpan.Zero) return new NotFoundResult();

            var transactions = user.FinanceTransactions;
            
            FinanceTransaction? transaction = transactions?.Values.ToImmutableArray().FirstOrNull(t => t.CreationDate == transactionId);
                
            if (transaction != null)
            {
                return Ok(transaction);
            }
            
            return new NotFoundResult();
        }
        
        
        [ProducesResponseType(StatusCodes.Status201Created)]
        [HttpPost]
        public ActionResult AddOrModifyUser(UserUpdateDto userUpdateDto)
        {
            var user = MemoryData.AddOrModifyUser(userUpdateDto);
            return CreatedAtRoute(nameof(GetUserById),  new {userId = user.Id}, user);
        }        
        
        [ProducesResponseType(StatusCodes.Status200OK)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        [HttpPut("{userId}")]
        public ActionResult UpdateUser(int userId, UserUpdateDto userUpdate)
        {
            var result = MemoryData.UserList.UpdateUser(userId, userUpdate);
            
            if (result != null) return Ok(result);
            
            return BadRequest();
        }
        
        [ProducesResponseType(StatusCodes.Status204NoContent)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        [HttpDelete("{id}")]
        public ActionResult DeleteUser(int id)
        {
            bool result = MemoryData.UserList.RemoveUser(id);
            
            if (result)
            {
                return NoContent();
            }

            return new BadRequestResult();
        }
        
        [ProducesResponseType(StatusCodes.Status200OK)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        [HttpPost("{userId}/transactions")]
        public ActionResult PostTransaction(int userId, FinanceTransactionInsertDto financeTransaction)
        {
            FinanceTransaction result = MemoryData.UserList.AddFinanceTransaction(userId, financeTransaction);

            if(result.UserId != TimeSpan.Zero) return Ok(result);

            return new BadRequestResult();
        }
        
        
    }
}