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}/customer")]
    [Produces("application/json")]
    [Authorize]
    public class CustomerController : ControllerBase
    {
        private readonly AyContext ct;
        private readonly ILogger<CustomerController> log;
        private readonly ApiServerState serverState;

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

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


        /// <summary>
        /// Get Customer
        /// </summary>
        /// <param name="id"></param>
        /// <returns>Customer</returns>
        [HttpGet("{id}")]
        public async Task<IActionResult> GetCustomer([FromRoute] long id)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            CustomerBiz biz = CustomerBiz.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 Customer
        /// </summary>        
        /// <param name="updatedObject"></param>
        /// <returns></returns>
        [HttpPut]
        public async Task<IActionResult> PutCustomer([FromBody] Customer updatedObject)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            CustomerBiz biz = CustomerBiz.GetBiz(ct, HttpContext);
            if (!Authorized.HasModifyRole(HttpContext.Items, biz.BizType))
                return StatusCode(403, new ApiNotAuthorizedResponse());
            var o = await biz.PutAsync(updatedObject); 
            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 Customer
        /// </summary>
        /// <param name="id"></param>
        /// <returns>NoContent</returns>
        [HttpDelete("{id}")]
        public async Task<IActionResult> DeleteCustomer([FromRoute] long id)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            CustomerBiz biz = CustomerBiz.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 Alert notes for this customer 
        /// </summary>
        /// <param name="id"></param>
        /// <returns>Alert notes or null</returns>
        [HttpGet("alert/{id}")]
        public async Task<IActionResult> GetCustomerAlert([FromRoute] long id)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            if (!Authorized.HasReadFullRole(HttpContext.Items, AyaType.Customer))
                return StatusCode(403, new ApiNotAuthorizedResponse());
            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            return Ok(ApiOkResponse.Response(await ct.Customer.AsNoTracking().Where(x => x.Id == id).Select(x => x.PopUpNotes).FirstOrDefaultAsync()));
        }

        /// <summary>
        /// Get addresses of interest for Customer id provided
        /// (postal, physical, headoffice postal if billheadoffice=true)
        /// </summary>
        /// <param name="id"></param>
        /// <returns>Multiple addresses</returns>
        [HttpGet("address/{id}")]
        public async Task<IActionResult> GetCustomerBillToAddress([FromRoute] long id)
        {
            if (!serverState.IsOpen)
                return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
            if (!Authorized.HasReadFullRole(HttpContext.Items, AyaType.Customer))
                return StatusCode(403, new ApiNotAuthorizedResponse());
            if (!ModelState.IsValid)
                return BadRequest(new ApiErrorResponse(ModelState));
            var cust = await ct.Customer.AsNoTracking().Where(x => x.Id == id).FirstOrDefaultAsync();
            if (cust == null)
                return NotFound(new ApiErrorResponse(ApiErrorCode.NOT_FOUND));

            HeadOffice head = null;
            if (cust.BillHeadOffice == true && cust.HeadOfficeId != null)
                head = await ct.HeadOffice.AsNoTracking().Where(x => x.Id == cust.HeadOfficeId).FirstOrDefaultAsync();


            return Ok(ApiOkResponse.Response(new
            {
                customerpost = new PostalAddressRecord(cust.Name, cust.PostAddress, cust.PostCity, cust.PostRegion, cust.PostCountry, cust.PostCode),
                customerphys = new AddressRecord(cust.Name, cust.Address, cust.City, cust.Region, cust.Country, cust.Latitude, cust.Longitude),
                headofficepost = (head != null ? new PostalAddressRecord(head.Name, head.PostAddress, head.PostCity, head.PostRegion, head.PostCountry, head.PostCode) : new PostalAddressRecord("", "", "", "", "", ""))
            }));
        }

        // /// <summary>
        // /// Get service (physical) address for this customer 
        // /// </summary>
        // /// <param name="id"></param>
        // /// <returns>Service address</returns>
        // [HttpGet("service-address/{id}")]
        // public async Task<IActionResult> GetCustomerServiceAddress([FromRoute] long id)
        // {
        //     if (!serverState.IsOpen)
        //         return StatusCode(503, new ApiErrorResponse(serverState.ApiErrorCode, null, serverState.Reason));
        //     if (!Authorized.HasReadFullRole(HttpContext.Items, AyaType.Customer))
        //         return StatusCode(403, new ApiNotAuthorizedResponse());
        //     if (!ModelState.IsValid)
        //         return BadRequest(new ApiErrorResponse(ModelState));
        //     var cust = await ct.Customer.AsNoTracking().Where(x => x.Id == id).FirstOrDefaultAsync();
        //     if (cust == null)
        //         return NotFound(new ApiErrorResponse(ApiErrorCode.NOT_FOUND));

        //     return Ok(ApiOkResponse.Response(new
        //     {
        //         customer = new AddressRecord(cust.Address, cust.City, cust.Region, cust.Country, cust.Latitude, cust.Longitude)
        //     }));
        // }




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


    }//eoc

    // internal record PostalAddressRecord(string PostAddress, string PostCity, string PostRegion, string PostCountry, string PostCode);
    // internal record AddressRecord(string Address, string City, string Region, string Country, decimal? Latitude, decimal? Longitude);
}//eons