using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Routing;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.JsonPatch;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;

using AyaNova.Models;
using AyaNova.Api.ControllerHelpers;
using AyaNova.Biz;


namespace AyaNova.Api.Controllers
{

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


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


        /// <summary>
        /// Get full DataListView object
        /// </summary>
        /// <param name="id"></param>
        /// <returns>A single DataListView</returns>
        [HttpGet("{id}")]
        public async Task<IActionResult> GetDataListView([FromRoute] long id)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

            //Instantiate the business object handler
            DataListViewBiz biz = DataListViewBiz.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, !Authorized.HasModifyRole(HttpContext.Items, biz.BizType)));
        }



        /// <summary>
        /// Get DataListView list
        /// </summary>
        /// <returns>List of public or owned data list views listKey provided</returns>    
        [HttpGet("ViewList", Name = nameof(DataListViewList))]
        public async Task<IActionResult> DataListViewList([FromQuery] string ListKey)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

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

            //Instantiate the business object handler
            DataListViewBiz biz = DataListViewBiz.GetBiz(ct, HttpContext);

            var l = await biz.GetViewListAsync(ListKey);
            return Ok(ApiOkResponse.Response(l, true));

        }


        /// <summary>
        /// Put (update) DataListView
        /// </summary>
        /// <param name="id"></param>
        /// <param name="inObj"></param>
        /// <returns></returns>
        [HttpPut("{id}")]
        public async Task<IActionResult> PutDataListView([FromRoute] long id, [FromBody] DataListView inObj)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

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

            //Instantiate the business object handler       
            DataListViewBiz biz = DataListViewBiz.GetBiz(ct, HttpContext);

            var o = await biz.GetAsync(id, false);
            if (o == null)
                return NotFound(new ApiErrorResponse(ApiErrorCode.NOT_FOUND));

            if (!Authorized.HasModifyRole(HttpContext.Items, biz.BizType))
                return StatusCode(403, new ApiNotAuthorizedResponse());

            try
            {
                if (!await biz.PutAsync(o, inObj))
                    return BadRequest(new ApiErrorResponse(biz.Errors));
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!await biz.ExistsAsync(id))
                    return NotFound(new ApiErrorResponse(ApiErrorCode.NOT_FOUND));
                else
                    return StatusCode(409, new ApiErrorResponse(ApiErrorCode.CONCURRENCY_CONFLICT));
            }
            return Ok(ApiOkResponse.Response(new { ConcurrencyToken = o.ConcurrencyToken }, true));
        }


        /// <summary>
        /// Post DataListView
        /// </summary>
        /// <param name="inObj"></param>
        /// <param name="apiVersion">Automatically filled from route path, no need to specify in body</param>
        /// <returns></returns>
        [HttpPost]
        public async Task<IActionResult> PostDataListView([FromBody] DataListView inObj, ApiVersion apiVersion)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

            //Instantiate the business object handler
            DataListViewBiz biz = DataListViewBiz.GetBiz(ct, HttpContext);

            //check roles
            if (!Authorized.HasCreateRole(HttpContext.Items, biz.BizType))
                return StatusCode(403, new ApiNotAuthorizedResponse());

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

            //Create and validate
            DataListView o = await biz.CreateAsync(inObj);
            if (o == null)
                return BadRequest(new ApiErrorResponse(biz.Errors));
            else
                return CreatedAtAction(nameof(DataListViewController.GetDataListView), new { id = o.Id, version = apiVersion.ToString() }, new ApiCreatedResponse(o));

        }

        /// <summary>
        /// Duplicate DataListView
        /// </summary>
        /// <param name="id">Create a duplicate of this items id</param>
        /// <param name="apiVersion">Automatically filled from route path, no need to specify in body</param>
        /// <returns></returns>
        [HttpPost("duplicate/{id}")]
        public async Task<IActionResult> Duplicate([FromRoute] long id, ApiVersion apiVersion)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

            //Instantiate the business object handler
            DataListViewBiz biz = DataListViewBiz.GetBiz(ct, HttpContext);

            //If a user has change roles
            if (!Authorized.HasCreateRole(HttpContext.Items, biz.BizType))
                return StatusCode(403, new ApiNotAuthorizedResponse());

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

            var oSrc = await biz.GetAsync(id, false);
            if (oSrc == null)
                return NotFound(new ApiErrorResponse(ApiErrorCode.NOT_FOUND));

            //Create and validate
            DataListView o = await biz.DuplicateAsync(oSrc);
            if (o == null)
                return BadRequest(new ApiErrorResponse(biz.Errors));
            else
                return CreatedAtAction(nameof(DataListViewController.GetDataListView), new { id = o.Id, version = apiVersion.ToString() }, new ApiCreatedResponse(o));

        }

        /// <summary>
        /// Delete DataListView
        /// </summary>
        /// <param name="id"></param>
        /// <returns>Ok</returns>
        [HttpDelete("{id}")]
        public async Task<IActionResult> DeleteDataListView([FromRoute] long id)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

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

            //Instantiate the business object handler
            DataListViewBiz biz = DataListViewBiz.GetBiz(ct, HttpContext);

            var o = await biz.GetAsync(id, false);
            if (o == null)
                return NotFound(new ApiErrorResponse(ApiErrorCode.NOT_FOUND));

            if (!Authorized.HasDeleteRole(HttpContext.Items, biz.BizType))
                return StatusCode(403, new ApiNotAuthorizedResponse());

            if (!await biz.DeleteAsync(o))
                return BadRequest(new ApiErrorResponse(biz.Errors));

            return NoContent();
        }

        /// <summary>
        /// Get default ListView for DataList
        /// </summary>
        /// <param name="dataListKey">Key of an existing DataList</param>
        /// <returns>A single DataListView</returns>
        [HttpGet("default/{dataListKey}")]
        public ActionResult GetDefaultDataListView([FromRoute] string dataListKey)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

            //Instantiate the business object handler
            DataListViewBiz biz = DataListViewBiz.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 = AyaNova.DataList.DataListFactory.GetAyaDataList(dataListKey); ;
            if (o == null)
                return NotFound(new ApiErrorResponse(ApiErrorCode.NOT_FOUND));

            return Ok(ApiOkResponse.Response(o.DefaultListView, true));
        }


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


    }//eoc
}//eons