using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Asp.Versioning;
using AutoMapper;
using gehGassi.Core.Interfaces;
using gehGassi.Core.Services;
using gehGassi.Dto;
using gehGassi.Dto.DogWalkers;
using gehGassi.Dto.Lookup;
using gehGassi.Dto.News;
using gehGassi.Web.Auth;
using gehGassi.Web.Helper;
using Microsoft.AspNetCore.Authentication.JwtBearer;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Options;
using NuGet.Packaging;

namespace gehGassi.Web.Controllers.Api
{
    /// <summary>
    /// Controller der Lookups via Api ermöglicht
    /// </summary>
    [Authorize(AuthenticationSchemes = JwtBearerDefaults.AuthenticationScheme)]
    [ApiController]
    [ApiVersion(1)]
    [Route("api/lookup")]
    [Route("api/v{v:apiVersion}/lookup")]
    public class ApiLookupController : ApiBaseController
    {
        /// <summary>
        /// Erstellt eine Instanz
        /// </summary>
        /// <param name="mapper">Instanz eines IMapper</param>
        /// <param name="localizationOptions">Instanz von LocalizationOptions</param>
        /// <param name="appUserService">Instanz eines IDogOwnerService</param>
        public ApiLookupController(IMapper mapper, IOptions<LocalizationOptions> localizationOptions, IAppUserService appUserService) : base(mapper, localizationOptions, appUserService)
        {
        }

        /// <summary>
        /// Gibt eine Liste von DogOwnern und DogWalkern basierend auf dem Filter zurück
        /// </summary>
        /// <param name="filter">Filter der in Vor- oder Nachnamen enthalten sein muss</param>
        /// <param name="take">wie viele Datensätze maximal sollen geliefert werden?</param>
        /// <returns></returns>
        [Route("Entities")]
        [HttpGet]
        public async Task<IActionResult> LookupEntities(string filter, int take)
        {
            var clientOffset = GetClientDateOffset();

            var result = new List<AppUserLookupDto>();
            filter = filter.ToLower();

            if (User?.Identity != null && User.Identity.IsAuthenticated)
            {

                //TODO: hier noch die Relationen berücksichtigen. Mal sehen wie.

                var appUsersQuery = AppUserService.Query(c => string.Concat(c.FirstName, " ", c.LastName).ToLower().Contains(filter) && c.Deleted == false && c.Locked == false && c.Id != User.AppUserId());

                var appUsers = await appUsersQuery.Take(take).ToListAsync().ConfigureAwait(false);

                result.AddRange(Mapper.Map<List<AppUserLookupDto>>(appUsers));

                var baseAddress = GetBaseAddress();
                foreach (var item in result)
                {
                    if(!string.IsNullOrWhiteSpace(item.Photo))
                        item.Photo = $"{baseAddress}/file/documents/thumbnails/{100}/{item.Photo}";
                }

                //Es wird bewusst keine sortierung gemacht. Diese erfolgt in der App
                return Ok(result);
            }
            return NotFound(CommunicationErrors.Common_NotFound);
        }

        /// <summary>
        /// Gibt eine Liste von DogWalkern basierend auf der aktuellen Position zurück
        /// </summary>
        /// <param name="lng">Längengrad</param>
        /// <param name="take">wie viele Datensätze maximal sollen geliefert werden?</param>
        /// <param name="ignoreId">Id des App-Users der ignoriert werden soll, falls ein DogOwner auch Walker ist</param>
        /// <param name="lat">Breitengrad</param>
        /// <returns></returns>
        [Route("DogWalkers")]
        [HttpGet]
        public async Task<IActionResult> DogWalkers(string ignoreId, double lat, double lng, int take)
        {
            var clientOffset = GetClientDateOffset();

            var result = new List<DogWalkerLookupDto>();
            
            if (User?.Identity != null && User.Identity.IsAuthenticated)
            {

                var walkers = await AppUserService.GetWalkersForAppAsync(ignoreId, lat, lng, take);

                result.AddRange(Mapper.Map<List<DogWalkerLookupDto>>(walkers));

                var baseAddress = GetBaseAddress();
                foreach (var item in result)
                {
                    if (!string.IsNullOrWhiteSpace(item.Photo))
                        item.Photo = $"{baseAddress}/file/documents/thumbnails/{100}/{item.Photo}";
                }

                //Es wird bewusst keine sortierung gemacht. Diese erfolgt in der App
                return Ok(result);
            }
            return NotFound(CommunicationErrors.Common_NotFound);
        }

        /// <summary>
        /// Gibt Detail-Infos zu einem DogWalker zurück
        /// </summary>
        /// <param name="dogWalkerId">Id des DogWalkers</param>
        /// <returns></returns>
        [Route("DogWalker")]
        [HttpGet]
        public async Task<IActionResult> DogWalker(string dogWalkerId)
        {
            var clientOffset = GetClientDateOffset();

            if (User?.Identity != null && User.Identity.IsAuthenticated)
            {

                var walker = await AppUserService.GetWalkerAsync(dogWalkerId);
                if (walker != null)
                {
                    var dto = Mapper.Map<DogWalkerInfoDto>(walker);
                    var baseAddress = GetBaseAddress();
                    if (!string.IsNullOrWhiteSpace(dto.Photo))
                        dto.Photo = $"{baseAddress}/file/documents/thumbnails/{400}/{dto.Photo}";

                    return Ok(dto);
                }
            }
            return NotFound(CommunicationErrors.Common_NotFound);
        }
    }
}