using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Routing;
using Microsoft.Extensions.Logging;
using Microsoft.AspNetCore.Authorization;
using AyaNova.Models;
using AyaNova.Api.ControllerHelpers;
using AyaNova.Biz;
using AyaNova.DataList;
using System.Threading.Tasks;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace AyaNova.Api.Controllers
{

    [ApiController]
    [ApiVersion("8.0")]
    [Route("api/v{version:apiVersion}/[controller]")]
    [Produces("application/json")]
    [Authorize]
    public class DataListController : ControllerBase
    {
        private readonly AyContext ct;
        private readonly ILogger<DataListController> log;
        private readonly ApiServerState serverState;



        /// <summary>
        /// ctor
        /// </summary>
        /// <param name="dbcontext"></param>
        /// <param name="logger"></param>
        /// <param name="apiServerState"></param>
        public DataListController(AyContext dbcontext, ILogger<DataListController> logger, ApiServerState apiServerState)
        {
            ct = dbcontext;
            log = logger;
            serverState = apiServerState;
        }


        /// <summary>
        ///  Get list of data for selection / viewing
        /// 
        /// Authorization varies list by list, will return 403 - Not Authorized if user has insufficient role
        /// 
        /// </summary>
        /// <param name="listOptions">List key, Paging, filtering and sorting options</param>
        /// <returns>Collection with paging data</returns>
        // [HttpPost("List", Name = nameof(List))]
        [HttpPost]
        public async Task<IActionResult> List([FromBody] ListOptions listOptions)
        {
            if (serverState.IsClosed)
                return StatusCode(503, new ApiErrorResponse(ApiErrorCode.API_CLOSED, null, serverState.Reason));

            if (listOptions.Limit == null || listOptions.Limit < 1)
            {
                listOptions.Limit = ListOptions.DefaultLimit;
            }
            if (listOptions.Offset == null)
            {
                listOptions.Offset = 0;            
            }
            //this is to workaround a quirk in the api explorer with default values
            if(listOptions.SortJson=="string"){
                listOptions.SortJson=string.Empty;
            }
             if(listOptions.FilterJson=="string"){
                listOptions.FilterJson=string.Empty;
            }
            

            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));

            var UserId = UserIdFromContext.Id(HttpContext.Items);
            var UserRoles = UserRolesFromContext.Roles(HttpContext.Items);

            try
            {
                ApiDataListResponse r = await DataListFetcher.GetResponseAsync(listOptions.DataListKey, ct, listOptions, UserId, UserRoles);
                return Ok(r);
            }
            catch (System.UnauthorizedAccessException)
            {
                return StatusCode(403, new ApiNotAuthorizedResponse());
            }
            catch (System.ArgumentOutOfRangeException e)
            {
                return BadRequest(new ApiErrorResponse(ApiErrorCode.NOT_FOUND, "DataListKey", e.Message));

            }
        }

        /// <summary>
        /// List of all DataList keys available
        /// </summary>        
        /// <returns>List of strings</returns>
        [HttpGet("ListKeys")]
        public ActionResult GetDataListKeys()
        {
            if (!serverState.IsOpen)
            {
                return StatusCode(503, new ApiErrorResponse(ApiErrorCode.API_CLOSED, null, serverState.Reason));
            }

            return Ok(ApiOkResponse.Response(DataListFactory.GetListOfAllDataListKeyNames(), true));
        }


        /// <summary>
        /// List of all fields for data list key specified
        /// </summary>        
        /// <returns>List of DataListFieldDefinition</returns>
        [HttpGet("ListFields")]
        public ActionResult GetDataListFields([FromQuery] string DataListKey)
        {
            if (!serverState.IsOpen)
            {
                return StatusCode(503, new ApiErrorResponse(ApiErrorCode.API_CLOSED, null, serverState.Reason));
            }

            var DataList = DataListFactory.GetAyaDataList(DataListKey);
            //was the name not found as a list?
            if (DataList == null)
            {
                return BadRequest(new ApiErrorResponse(ApiErrorCode.NOT_FOUND, "DataListKey", $"DataList \"{DataListKey}\" specified does not exist"));
            }

            return Ok(ApiOkResponse.Response(DataList.FieldDefinitions, true));
        }

    }//eoc
}//ens