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


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

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

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

        /// <summary>
        /// Duplicate Unit
        /// (Wiki and Attachments are not duplicated)
        /// </summary>
        /// <param name="id">Source object id</param>
        /// <param name="apiVersion">From route path</param>
        /// <returns>Unit</returns>
        [HttpPost("duplicate/{id}")]
        public async Task<IActionResult> DuplicateUnit([FromRoute] long id, ApiVersion apiVersion)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            UnitBiz biz = UnitBiz.GetBiz(ct, HttpContext);
            if (!Authorized.HasCreateRole(HttpContext.Items, biz.BizType))
                return StatusCode(403, new ApiNotAuthorizedResponse());
            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            Unit o = await biz.DuplicateAsync(id);
            if (o == null)
                return BadRequest(new ApiErrorResponse(biz.Errors));
            else
                return CreatedAtAction(nameof(UnitController.GetUnit), new { id = o.Id, version = apiVersion.ToString() }, new ApiCreatedResponse(o));
        }

        /// <summary>
        /// Get Unit
        /// </summary>
        /// <param name="id"></param>
        /// <returns>Unit</returns>
        [HttpGet("{id}")]
        public async Task<IActionResult> GetUnit([FromRoute] long id)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            UnitBiz biz = UnitBiz.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 Unit
        /// </summary>        
        /// <param name="updatedObject"></param>
        /// <returns></returns>
        [HttpPut]
        public async Task<IActionResult> PutUnit([FromBody] Unit updatedObject)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            UnitBiz biz = UnitBiz.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 Unit
        /// </summary>
        /// <param name="id"></param>
        /// <returns>NoContent</returns>
        [HttpDelete("{id}")]
        public async Task<IActionResult> DeleteUnit([FromRoute] long id)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            UnitBiz biz = UnitBiz.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 service address for this Unit 
        /// </summary>
        /// <param name="id"></param>
        /// <returns>Service address</returns>
        [HttpGet("address/{id}")]
        public async Task<IActionResult> GetUnitServiceAddress([FromRoute] long id)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            if (!Authorized.HasReadFullRole(HttpContext.Items, AyaType.Unit))
                return StatusCode(403, new ApiNotAuthorizedResponse());
            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            var unt = await ct.Unit.AsNoTracking().Where(x => x.Id == id).FirstOrDefaultAsync();
            if (unt == null)
                return NotFound(new ApiErrorResponse(ApiErrorCode.NOT_FOUND));

            return Ok(ApiOkResponse.Response(new
            {
                unit = new AddressRecord(unt.Serial, unt.Address, unt.City, unt.Region, unt.Country, unt.Latitude, unt.Longitude)
            }));
        }



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


    }//eoc
}//eons