using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace BLL
{
   public static class AudiFlowService
   {
       /// <summary>
       /// 根据工作流模块查询审核步骤集合
       /// </summary>
       /// <param name="flowModule">工作流模块</param>
       /// <returns></returns>
       public static List<Model.AudiFlow> GetAudiFlowsByFlowModule(string flowModule)
       {
           return (from x in Funs.DB.AudiFlow where x.FlowModule == flowModule orderby x.AudiFlowStep select x).ToList();
       }

       /// <summary>
       /// 根据工作流模块与审核步骤编号查询审核步骤
       /// </summary>
       /// <param name="flowModule">工作流模块</param>
       /// <param name="audiFlowCode">审核步骤编号</param>
       /// <returns></returns>
       public static Model.AudiFlow GetAudiFlowsByFlowModuleAndAudiFlowId(string flowModule, string audiFlowId)
       {
           return (from x in Funs.DB.AudiFlow where x.FlowModule == flowModule && x.AudiFlowId == audiFlowId select x).FirstOrDefault();
       }

       /// <summary>
       /// 获取流程的第一个步骤
       /// </summary>
       /// <param name="flowModule"></param>
       /// <param name="audiFlowStep"></param>
       /// <returns></returns>
       public static Model.AudiFlow GetFristAuditFlowStep(string flowModule)
       {
           return (from x in Funs.DB.AudiFlow where x.FlowModule == flowModule orderby x.AudiFlowStep select x).FirstOrDefault();
       }

       /// <summary>
       /// 获取流程下一步骤
       /// </summary>
       /// <param name="flowModule">菜单ID</param>
       /// <param name="audiFlowStep">步骤</param>
       /// <returns></returns>
       public static List<Model.AudiFlow> GetNextAuditFlowStep(string flowModule, int audiFlowStep)
       {
           var q = from x in Funs.DB.AudiFlow where x.FlowModule == flowModule && x.AudiFlowStep > audiFlowStep orderby x.AudiFlowStep select x;
           if (q.Count() > 0)
           {
               return q.ToList();
           }
           else
           {
               return null;
           }
       }

       /// <summary>
       /// 根据步骤获取菜单的流程信息
       /// </summary>
       /// <param name="flowModule"></param>
       /// <param name="audiFlowStep"></param>
       /// <returns></returns>
       public static Model.AudiFlow GetAuditFlow(string flowModule, int audiFlowStep)
       {
           return (from x in Funs.DB.AudiFlow where x.FlowModule == flowModule && x.AudiFlowStep == audiFlowStep select x).FirstOrDefault();
       }

       /// <summary>
       /// 获取结束的步骤
       /// </summary>
       /// <param name="flowModule"></param>
       /// <returns></returns>
       public static Model.AudiFlow GetEndAuditFlowStep(string flowModule)
       {
           return  (from x in Funs.DB.AudiFlow where x.FlowModule == flowModule && x.IsFlowEnd == true select x).FirstOrDefault();

       }

       /// <summary>
       /// 获取结束的步骤集合
       /// </summary>
       /// <param name="flowModule"></param>
       /// <returns></returns>
       public static List<Model.AudiFlow> GetEndAuditFlowStepList(string flowModule)
       {
           return (from x in Funs.DB.AudiFlow where x.FlowModule == flowModule && x.IsFlowEnd == true select x).ToList();

       }

       /// <summary>
       /// 获取结束步骤的前一步骤
       /// </summary>
       /// <param name="flowModule"></param>
       /// <returns></returns>
       public static int? GetPreStepOfEndStep(string flowModule)
       {
           var q = from x in Funs.DB.AudiFlow where x.FlowModule == flowModule && x.IsFlowEnd == true select x;
           if (q.Count() > 0)
           {
               int endStep = q.First().AudiFlowStep;
               return endStep - 1;
           }
           else
           {
               return null;
           }

       }

       /// <summary>
       /// 流程结束是否设置
       /// </summary>
       /// <param name="flowModule"></param>
       /// <returns></returns>
       public static bool IsAuditFlowEnd(string flowModule, string audiFlowId)
       {
           bool isEnd = false;
           if (audiFlowId == null)
           {
               var q = from x in Funs.DB.AudiFlow where x.FlowModule == flowModule && x.IsFlowEnd == true select x;
               if (q.Count() > 0)
               {
                   isEnd = true;
               }
           }
           else
           {
               var q = from x in Funs.DB.AudiFlow where x.FlowModule == flowModule && x.AudiFlowId != audiFlowId && x.IsFlowEnd == true select x;
               if (q.Count() > 0)
               {
                   isEnd = true;
               }
           }
           return isEnd;
       }

       /// <summary>
       /// 添加工作流信息
       /// </summary>
       /// <param name="flow"></param>
       public static void AddAuditFlow(Model.AudiFlow flow)
       {
           Model.SGGLDB db = Funs.DB;
           string newKeyID = SQLHelper.GetNewID(typeof(Model.AudiFlow));
           Model.AudiFlow newFlow = new Model.AudiFlow();
           newFlow.AudiFlowId = newKeyID;
           newFlow.AudiFlowStep = flow.AudiFlowStep;
           newFlow.AuditFlowName = flow.AuditFlowName;
           newFlow.FlowModule = flow.FlowModule;
           newFlow.NextAuditFlow = flow.NextAuditFlow;
           newFlow.RoleId = flow.RoleId;
           newFlow.IsFlowEnd = flow.IsFlowEnd;

           db.AudiFlow.InsertOnSubmit(newFlow);
           db.SubmitChanges();
       }

       /// <summary>
       /// 修改工作流信息
       /// </summary>
       /// <param name="flow"></param>
       public static void UpdateAuditFlow(Model.AudiFlow flow)
       {
           Model.SGGLDB db = Funs.DB;
           Model.AudiFlow newFlow = db.AudiFlow.FirstOrDefault(e => e.AudiFlowId == flow.AudiFlowId);
           if (newFlow != null)
           {
               newFlow.AudiFlowStep = flow.AudiFlowStep;
               newFlow.AuditFlowName = flow.AuditFlowName;
               newFlow.FlowModule = flow.FlowModule;
               newFlow.NextAuditFlow = flow.NextAuditFlow;
               newFlow.RoleId = flow.RoleId;
               newFlow.IsFlowEnd = flow.IsFlowEnd;

               db.SubmitChanges();
           }
       }

       /// <summary>
       /// 删除工作流信息
       /// </summary>
       /// <param name="audiFlowId"></param>
       public static void DeleteAuditFlow(string audiFlowId)
       {
           Model.SGGLDB db = Funs.DB;
           Model.AudiFlow flow = db.AudiFlow.First(e => e.AudiFlowId == audiFlowId);
           db.AudiFlow.DeleteOnSubmit(flow);
           db.SubmitChanges();
       }
    }
}