using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Routing;
using Microsoft.AspNetCore.Authorization;
using Microsoft.Extensions.Logging;
using Sockeye.Models;
using Sockeye.Api.ControllerHelpers;
using Sockeye.Biz;
using System.Linq;

namespace Sockeye.Api.Controllers
{

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

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



        /// <summary>
        /// Create search parameters
        /// MaxResults defaults to 500 
        /// MaxResults = 0 returns all results 
        /// </summary>
        /// <param name="searchParams"></param>
        /// <returns>SearchResult list</returns>
        [HttpPost]
        public async Task<IActionResult> PostSearch([FromBody] Search.SearchRequestParameters searchParams)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

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

            //Do the search
            var SearchResults = await Search.DoSearchAsync(
                ct,
                UserTranslationIdFromContext.Id(HttpContext.Items),
                UserRolesFromContext.Roles(HttpContext.Items),
                UserIdFromContext.Id(HttpContext.Items),
                searchParams
            );

            return Ok(ApiOkResponse.Response(SearchResults));
        }

        /// <summary>
        /// Get search result summary
        /// </summary>
        /// <param name="sockType"></param>
        /// <param name="id"></param>
        /// <param name="phrase"></param>
        ///  <param name="max"></param>
        /// <returns>A search result excerpt of object</returns>
        [HttpGet("info/{sockType}/{id}")]
        public async Task<IActionResult> GetInfo([FromRoute] SockType sockType, [FromRoute] long id, [FromQuery] string phrase, [FromQuery] int max = 80)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

            if (!Authorized.HasReadFullRole(HttpContext.Items, sockType))
                return StatusCode(403, new ApiNotAuthorizedResponse());

            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            if (id == 0)
                return BadRequest(new ApiErrorResponse(ApiErrorCode.VALIDATION_INVALID_VALUE, "id", "id can't be zero"));


            var res = await Search.GetInfoAsync(UserTranslationIdFromContext.Id(HttpContext.Items),
            UserRolesFromContext.Roles(HttpContext.Items), UserIdFromContext.Id(HttpContext.Items), phrase, max, sockType, id, ct);

            return Ok(ApiOkResponse.Response(res));
        }



        /// <summary>
        /// Get the top level ancestor of provided type and id
        /// (e.g. find the WorkOrder principle for a WorkOrderItemPart object descendant)
        /// </summary>
        /// <param name="sockType"></param>
        /// <param name="id"></param>        
        /// <returns>A type and id of ancestor</returns>
        [HttpGet("ancestor/{sockType}/{id}")]
        public async Task<IActionResult> GetAncestor([FromRoute] SockType sockType, [FromRoute] long id)
        {
            if (serverState.IsClosed)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

            //since this is for opening an entire object it's appropriate to check if they have any role first
            if (!Authorized.HasAnyRole(HttpContext.Items, sockType))
                return StatusCode(403, new ApiNotAuthorizedResponse());

            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            if (id == 0)
                return BadRequest(new ApiErrorResponse(ApiErrorCode.VALIDATION_INVALID_VALUE, null, "id can't be zero"));

            switch (sockType)
            {

                case SockType.SubscriptionItem:
                    {
                        var subId = await ct.SubscriptionItem.AsNoTracking().Where(z => z.Id == id).Select(z => z.SubscriptionId).SingleOrDefaultAsync();
                        return Ok(ApiOkResponse.Response(new { SockType = (int)SockType.Subscription, Id = subId }));
                    }

                default:
                    return BadRequest(new ApiErrorResponse(ApiErrorCode.VALIDATION_INVALID_VALUE, null, "Only types with ancestors are valid"));

            }

        }



        //------------


    }//eoc
}//eons