using System.Linq;
using System.Net.Http;
using System.Net;
using System.Text;
using System.Web.Http;

using Newtonsoft.Json;

using static HH.WCS.Mobox3.AnGang.api.OtherModel;
using System.Threading.Tasks;

namespace HH.WCS.Mobox3.AnGang.api {
    /// <summary>
    /// ERP 调用的接口
    /// </summary>
    [RoutePrefix("api")]
    public class ErpController : ApiController {
        /// <summary>
        /// 入库数据同步(ERP)
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        [HttpPost]
        [Route("InboundDataSync")]
        public IHttpActionResult InboundDataSync(InboundDataSyncInfo model) {
            LogHelper.Info("触发API：入库数据同步" + JsonConvert.SerializeObject(model), "API");

            //var headers = Request.Headers; // 暂不考虑对请求HTTP进行校验，默认发来的请求格式都正确

            //return new ErpResult { errCode = 1, errMsg = "测试" };
            //return CreateSuccessResponse(new ErpResult { errCode = 1, errMsg = "测试"});

            //var headers = Request.Headers;
            //return ProcessInboundData(headers, model);

            //return ApiHelper.InboundDataSync(model);
            return NormalProcessInboundData(model); // 暂时使用原本的逻辑
        }

        /// <summary>
        /// 出库发料同步(ERP)
        /// </summary>
        /// <param name="model"></param>
        /// <returns></returns>
        [HttpPost]
        [Route("OutboundDataSync")]
        public IHttpActionResult OutboundDataSync(OutboundDataSyncInfo model) {
            LogHelper.Info("触发API：出库发料同步" + JsonConvert.SerializeObject(model), "API");

            //var headers = Request.Headers;
            //return ProcessOutboundData(headers, model);

            //return ApiHelper.OutboundDataSync(model);
            return NormalProcessOutboundData(model); // 暂时使用原本的逻辑
        }

        private IHttpActionResult NormalProcessInboundData(InboundDataSyncInfo model) {
            var data = ApiHelper.InboundDataSync(model);
            return ResponseMessage(new HttpResponseMessage(HttpStatusCode.OK) {
                Headers = { },
                Content = new StringContent(JsonConvert.SerializeObject(data), Encoding.UTF8, "application/json")
            });
        }

        private IHttpActionResult NormalProcessOutboundData(OutboundDataSyncInfo model) {
            var data = ApiHelper.OutboundDataSync(model);
            return ResponseMessage(new HttpResponseMessage(HttpStatusCode.OK) {
                Headers = { },
                Content = new StringContent(JsonConvert.SerializeObject(data), Encoding.UTF8, "application/json")
            });
        }

        private IHttpActionResult ProcessInboundData(System.Net.Http.Headers.HttpRequestHeaders headers, InboundDataSyncInfo model) {
            // 必须字段验证
            if (!headers.Contains("sourceAppCode") || !headers.Contains("serviceId") || !headers.Contains("msgSendTime")) {
                return CreateErrorResponse("2003", "缺少必要请求头参数");
            }

            var headerModel = new {
                SourceAppCode = headers.GetValues("sourceAppCode").First(),
                Password = headers.Contains("password") ? headers.GetValues("password").First() : null,
                ServiceId = headers.GetValues("serviceId").First(),
                MsgToken = headers.Contains("msgToken") ? headers.GetValues("msgToken").First() : null,
                MsgSendTime = headers.GetValues("msgSendTime").First()
            };

            // 2. 验证Header
            var validationResult = ValidateHeaders(headerModel);
            if (validationResult != null) {
                return validationResult;
            }

            // 3. 读取Body
            //string requestBody = await Request.Content.ReadAsStringAsync(); // 不需要异步读取，直接用model

            // 4. 验证Body
            if (Request.Content.Headers.ContentLength > 2 * 1024 * 1024) {
                return CreateErrorResponse("2102", "消息内容过长，超过2M");
            }

            // 5. 处理业务逻辑
            var result = ApiHelper.InboundDataSync(model);

            // 6. 返回成功响应
            return CreateSuccessResponse(result);
        }

        private IHttpActionResult ProcessOutboundData(System.Net.Http.Headers.HttpRequestHeaders headers, OutboundDataSyncInfo model) {
            // 必须字段验证
            if (!headers.Contains("sourceAppCode") || !headers.Contains("serviceId") || !headers.Contains("msgSendTime")) {
                return CreateErrorResponse("2003", "缺少必要请求头参数");
            }

            var headerModel = new {
                SourceAppCode = headers.GetValues("sourceAppCode").First(),
                Password = headers.Contains("password") ? headers.GetValues("password").First() : null,
                ServiceId = headers.GetValues("serviceId").First(),
                MsgToken = headers.Contains("msgToken") ? headers.GetValues("msgToken").First() : null,
                MsgSendTime = headers.GetValues("msgSendTime").First()
            };

            // 2. 验证Header
            var validationResult = ValidateHeaders(headerModel);
            if (validationResult != null) {
                return validationResult;
            }

            // 3. 读取Body
            //string requestBody = await Request.Content.ReadAsStringAsync();

            // 4. 验证Body
            if (Request.Content.Headers.ContentLength > 2 * 1024 * 1024) {
                return CreateErrorResponse("2102", "消息内容过长，超过2M");
            }

            // 5. 处理业务逻辑
            var result = ApiHelper.OutboundDataSync(model);

            // 6. 返回成功响应
            return CreateSuccessResponse(result);
        }

        private IHttpActionResult CreateSuccessResponse(object data) {
            return ResponseMessage(new HttpResponseMessage(HttpStatusCode.OK) {
                Headers = { { "returnCode", "0" } },
                Content = new StringContent(JsonConvert.SerializeObject(data), Encoding.UTF8, "application/json")
            });
        }

        private IHttpActionResult CreateErrorResponse(string code, string message) {
            return ResponseMessage(new HttpResponseMessage(HttpStatusCode.OK) {
                Headers = { { "returnCode", code } },
                Content = new StringContent(message)
            });
        }

        private IHttpActionResult ValidateHeaders(dynamic headers) {
            // 实现所有Header验证逻辑
            if (!IsRegisteredApp(headers.SourceAppCode, headers.Password)) {
                return CreateErrorResponse("2201", "源调用系统未注册");
            }

            if (!IsValidService(headers.ServiceId)) {
                return CreateErrorResponse("2202", "代理服务未注册");
            }

            if (!IsValidDateTime(headers.MsgSendTime)) {
                return CreateErrorResponse("2101", "时间格式校验失败");
            }

            if (!string.IsNullOrEmpty(headers.MsgToken) && headers.MsgToken.Length > 32) {
                return CreateErrorResponse("2104", "消息令牌过长，超过32位");
            }

            return null;
        }

        private bool IsRegisteredApp(string appId, string password) {
            return true;
        }

        private bool IsValidService(string serviceId) {
            return true;
        }

        private bool IsValidDateTime(string dataTime) {
            return true;
        }
    }
}