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


namespace AyaNova.Api.Controllers
{

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


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


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

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

            //NOTE: This is the first check and often the only check but in some cases with some objects this will also need to check biz object rules 
            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));

            // NOTE: HERE would be the second check of biz rules before returning the object
            // in cases where there is also a business rule to affect retrieval on top of basic rights

            return Ok(ApiOkResponse.Response(o, !Authorized.HasModifyRole(HttpContext.Items, biz.BizType)));
        }



        /// <summary>
        /// Put (update) PM
        /// </summary>
        /// <param name="id"></param>
        /// <param name="inObj"></param>
        /// <returns></returns>
        [HttpPut("{id}")]
        public async Task<IActionResult> PutPM([FromRoute] long id, [FromBody] PM 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       
            PMBiz biz = PMBiz.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 { Concurrency = o.Concurrency }, true));
        }






        /// <summary>
        /// Create PM
        /// </summary>
        /// <param name="pmTemplateId"></param>
        /// <param name="customerId"></param>
        /// <param name="serial">force a workorder number, leave null to autogenerate the next one in sequence (mostly used for import)</param>
        /// <param name="apiVersion">From route path</param>
        /// <returns>A created workorder ready to fill out</returns>
        [HttpPost("Create")]
        public async Task<IActionResult> PostPM([FromQuery] long? pmTemplateId, long? customerId, uint? serial, ApiVersion apiVersion)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

            //Instantiate the business object handler
            PMBiz biz = PMBiz.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));

            //Create and validate
            PM o = await biz.CreateAsync(pmTemplateId,customerId, serial);
            if (o == null)
                return BadRequest(new ApiErrorResponse(biz.Errors));
            else
                return CreatedAtAction(nameof(PMController.GetPM), new { id = o.Id, version = apiVersion.ToString() }, new ApiCreatedResponse(o));


        }

        /// <summary>
        /// Duplicate PM
        /// </summary>
        /// <param name="id">Create a duplicate of this items id</param>
        /// <param name="apiVersion">From route path</param>
        /// <returns></returns>
        [HttpPost("duplicate/{id}")]
        public async Task<IActionResult> DuplicatePM([FromRoute] long id, ApiVersion apiVersion)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));

            //Instantiate the business object handler
            PMBiz biz = PMBiz.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
            PM o = await biz.DuplicateAsync(oSrc);
            if (o == null)
                return BadRequest(new ApiErrorResponse(biz.Errors));
            else
                return CreatedAtAction(nameof(PMController.GetPM), new { id = o.Id, version = apiVersion.ToString() }, new ApiCreatedResponse(o));

        }



        /// <summary>
        /// Delete PM
        /// </summary>
        /// <param name="id"></param>
        /// <returns>Ok</returns>
        [HttpDelete("{id}")]
        public async Task<IActionResult> DeletePM([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
            PMBiz biz = PMBiz.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();
        }





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


    }//eoc
}//eons