using System;
using System.Linq;
using System.Net;
using System.Threading.Tasks;
using Bit.Core;
using Bit.Core.Enums;
using Bit.Core.Models.Api.Public;
using Bit.Core.Repositories;
using Bit.Core.Services;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;

namespace Bit.Api.Public.Controllers
{
    [Route("public/policies")]
    [Authorize("Organization")]
    public class PoliciesController : Controller
    {
        private readonly IPolicyRepository _policyRepository;
        private readonly IPolicyService _policyService;
        private readonly CurrentContext _currentContext;

        public PoliciesController(
            IPolicyRepository policyRepository,
            IPolicyService policyService,
            CurrentContext currentContext)
        {
            _policyRepository = policyRepository;
            _policyService = policyService;
            _currentContext = currentContext;
        }

        /// <summary>
        /// Retrieve a policy.
        /// </summary>
        /// <remarks>
        /// Retrieves the details of a policy.
        /// </remarks>
        /// <param name="type">The type of policy to be retrieved.</param>
        [HttpGet("{type}")]
        [ProducesResponseType(typeof(GroupResponseModel), (int)HttpStatusCode.OK)]
        [ProducesResponseType((int)HttpStatusCode.NotFound)]
        public async Task<IActionResult> Get(PolicyType type)
        {
            var policy = await _policyRepository.GetByOrganizationIdTypeAsync(
                _currentContext.OrganizationId.Value, type);
            if(policy == null)
            {
                return new NotFoundResult();
            }
            var response = new PolicyResponseModel(policy);
            return new JsonResult(response);
        }

        /// <summary>
        /// List all policies.
        /// </summary>
        /// <remarks>
        /// Returns a list of your organization's policies.
        /// </remarks>
        [HttpGet]
        [ProducesResponseType(typeof(ListResponseModel<PolicyResponseModel>), (int)HttpStatusCode.OK)]
        public async Task<IActionResult> List()
        {
            var policies = await _policyRepository.GetManyByOrganizationIdAsync(_currentContext.OrganizationId.Value);
            var policyResponses = policies.Select(p => new PolicyResponseModel(p));
            var response = new ListResponseModel<PolicyResponseModel>(policyResponses);
            return new JsonResult(response);
        }

        /// <summary>
        /// Update a policy.
        /// </summary>
        /// <remarks>
        /// Updates the specified policy. If a property is not provided,
        /// the value of the existing property will be reset.
        /// </remarks>
        /// <param name="type">The type of policy to be updated.</param>
        /// <param name="model">The request model.</param>
        [HttpPut("{id}")]
        [ProducesResponseType(typeof(PolicyResponseModel), (int)HttpStatusCode.OK)]
        [ProducesResponseType(typeof(ErrorResponseModel), (int)HttpStatusCode.BadRequest)]
        [ProducesResponseType((int)HttpStatusCode.NotFound)]
        public async Task<IActionResult> Put(PolicyType type, [FromBody]PolicyUpdateRequestModel model)
        {
            var policy = await _policyRepository.GetByOrganizationIdTypeAsync(
                _currentContext.OrganizationId.Value, type);
            if(policy == null)
            {
                policy = model.ToPolicy(_currentContext.OrganizationId.Value);
            }
            else
            {
                policy = model.ToPolicy(policy);
            }
            await _policyService.SaveAsync(policy);
            var response = new PolicyResponseModel(policy);
            return new JsonResult(response);
        }
    }
}