using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Routing;
using Microsoft.AspNetCore.Authorization;
using Microsoft.Extensions.Logging;
using AyaNova.Models;
using AyaNova.Api.ControllerHelpers;
using AyaNova.Biz;
using System.Linq;
using Microsoft.EntityFrameworkCore;
using System.Collections.Generic;
using System;

namespace AyaNova.Api.Controllers
{
    [ApiController]
    [ApiVersion("8.0")]
    [Route("api/v{version:apiVersion}/notify-subscription")]
    [Produces("application/json")]
    [Authorize]
    public class NotifySubscriptionController : ControllerBase
    {
        private readonly AyContext ct;
        private readonly ILogger<NotifySubscriptionController> log;
        private readonly ApiServerState serverState;

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

        /// <summary>
        /// Create NotifySubscription
        /// </summary>
        /// <param name="newObject"></param>
        /// <param name="apiVersion">From route path</param>
        /// <returns></returns>
        [HttpPost]
        public async Task<IActionResult> PostNotifySubscription([FromBody] NotifySubscription newObject, ApiVersion apiVersion)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            NotifySubscriptionBiz biz = NotifySubscriptionBiz.GetBiz(ct, HttpContext);
            if (!Authorized.HasCreateRole(HttpContext.Items, biz.BizType))
                return StatusCode(403, new ApiNotAuthorizedResponse());
            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            NotifySubscription o = await biz.CreateAsync(newObject);
            if (o == null)
                return BadRequest(new ApiErrorResponse(biz.Errors));
            else
                return CreatedAtAction(nameof(NotifySubscriptionController.GetNotifySubscription), new { id = o.Id, version = apiVersion.ToString() }, new ApiCreatedResponse(o));
        }

        // /// <summary>
        // /// Duplicate NotifySubscription
        // /// </summary>
        // /// <param name="id">Source object id</param>
        // /// <param name="apiVersion">From route path</param>
        // /// <returns>NotifySubscription</returns>
        // [HttpPost("duplicate/{id}")]
        // public async Task<IActionResult> DuplicateNotifySubscription([FromRoute] long id, ApiVersion apiVersion)
        // {
        //     if (!serverState.IsOpen)
        //         return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
        //     NotifySubscriptionBiz biz = NotifySubscriptionBiz.GetBiz(ct, HttpContext);
        //     if (!Authorized.HasCreateRole(HttpContext.Items, biz.BizType))
        //         return StatusCode(403, new ApiNotAuthorizedResponse());
        //     if (!ModelState.IsValid)
        //         return BadRequest(new ApiErrorResponse(ModelState));
        //     NotifySubscription o = await biz.DuplicateAsync(id);
        //     if (o == null)
        //         return BadRequest(new ApiErrorResponse(biz.Errors));
        //     else
        //         return CreatedAtAction(nameof(NotifySubscriptionController.GetNotifySubscription), new { id = o.Id, version = apiVersion.ToString() }, new ApiCreatedResponse(o));
        // }

        /// <summary>
        /// Get NotifySubscription
        /// </summary>
        /// <param name="id"></param>
        /// <returns>NotifySubscription</returns>
        [HttpGet("{id}")]
        public async Task<IActionResult> GetNotifySubscription([FromRoute] long id)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            NotifySubscriptionBiz biz = NotifySubscriptionBiz.GetBiz(ct, HttpContext);
            if (!Authorized.HasReadFullRole(HttpContext.Items, biz.BizType))
                return StatusCode(403, new ApiNotAuthorizedResponse());
            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            var o = await biz.GetAsync(id);
            if (o == null) return NotFound(new ApiErrorResponse(ApiErrorCode.NOT_FOUND));
            return Ok(ApiOkResponse.Response(o));
        }

        /// <summary>
        /// Update NotifySubscription
        /// </summary>        
        /// <param name="updatedObject"></param>
        /// <returns></returns>
        [HttpPut]
        public async Task<IActionResult> PutNotifySubscription([FromBody] NotifySubscription updatedObject)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            NotifySubscriptionBiz biz = NotifySubscriptionBiz.GetBiz(ct, HttpContext);
            if (!Authorized.HasModifyRole(HttpContext.Items, biz.BizType))
                return StatusCode(403, new ApiNotAuthorizedResponse());
            var o = await biz.PutAsync(updatedObject);//In future may need to return entire object, for now just concurrency token 
            if (o == null)
            {
                if (biz.Errors.Exists(z => z.Code == ApiErrorCode.CONCURRENCY_CONFLICT))
                    return StatusCode(409, new ApiErrorResponse(biz.Errors));
                else
                    return BadRequest(new ApiErrorResponse(biz.Errors));
            }
            return Ok(ApiOkResponse.Response(new { Concurrency = o.Concurrency }));
        }

        /// <summary>
        /// Delete NotifySubscription
        /// </summary>
        /// <param name="id"></param>
        /// <returns>NoContent</returns>
        [HttpDelete("{id}")]
        public async Task<IActionResult> DeleteNotifySubscription([FromRoute] long id)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            NotifySubscriptionBiz biz = NotifySubscriptionBiz.GetBiz(ct, HttpContext);
            if (!Authorized.HasDeleteRole(HttpContext.Items, biz.BizType))
                return StatusCode(403, new ApiNotAuthorizedResponse());
            if (!await biz.DeleteAsync(id))
                return BadRequest(new ApiErrorResponse(biz.Errors));
            return NoContent();
        }


        /// <summary>
        /// Get Subscription list
        /// </summary>     
        /// <returns>User's notification subscription list </returns>
        [HttpGet("list")]
        public async Task<IActionResult> GetQueue()
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

            //NOTE: in future if getting list for another user should just duplicate this method but add the parameter for user id
            //and checking of rights
            long UserId = UserIdFromContext.Id(HttpContext.Items);

            var subs = await ct.NotifySubscription.AsNoTracking().Where(z => z.UserId == UserId).ToListAsync();

            List<NotifySubscriptionRecord> ret = new List<NotifySubscriptionRecord>();
            foreach (var s in subs)
            {
                ret.Add(new NotifySubscriptionRecord(s.Id, s.UserId, s.EventType, s.AyaType, s.DeliveryMethod, s.DeliveryAddress, s.Tags, await GetStatusName(s, ct), s.AgeValue, s.DecValue));
            }

            return Ok(ApiOkResponse.Response(ret));
        }
        private record NotifySubscriptionRecord(
            long id, long userid, NotifyEventType eventType, AyaType AyaType,
        NotifyDeliveryMethod deliveryMethod, string deliveryAddress, List<string> tags, string status, TimeSpan ageValue, decimal decValue
        );

        //Provide extra info about subscription
        private static async Task<string> GetStatusName(NotifySubscription s, AyContext ct)
        {
            switch (s.EventType)
            {
                case NotifyEventType.WorkorderStatusAge:
                case NotifyEventType.WorkorderStatusChange:
                    //add status text to info
                    return await ct.WorkOrderStatus.AsNoTracking().Where(x => x.Id == s.IdValue).Select(x => x.Name).FirstOrDefaultAsync();
                case NotifyEventType.QuoteStatusAge:
                case NotifyEventType.QuoteStatusChange:
                throw new System.NotImplementedException("TODO: quote status events in notifysubscriptioncontroller::getStatusName");
            }
            return string.Empty;
        }
        //------------


    }//eoc
}//eons