using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using wispro.sp.entity;
using wispro.sp.entity.workflowInstance;
using wispro.sp.share;

namespace wispro.sp.api.Controllers
{
    [Route("api/[controller]/[action]")]
    [ApiController]
    public class WorkflowEngineController : ControllerBase
    {
        spDbContext Context;

        public WorkflowEngineController(spDbContext context)
        {
            Context = context;
        }

        public void DoAction(int instanceId,int stepId,int ActionId,List<InputValue> inputValues)
        {
            //1、取实例对象

            //2、取步骤对象

            //3、判断Action定义对象

            //4、判断输入值合法性

            //5、保存数据
        }

        [HttpPost]
        public ApiSaveResponse AddNew(NewWorkflowObject workflowObject)
        {
            ApiSaveResponse ret = new ApiSaveResponse();
            ret.Success = true;

            using(var t = Context.Database.BeginTransaction())
            {
                try
                {
                    if (workflowObject.InitAction != null)
                    {
                        Context.Actions.Add(workflowObject.InitAction);
                        Context.SaveChanges();
                    }
                    else
                    {
                        throw new ApplicationException("没有设定初始化Action！");
                    }

                    workflowObject.Workflow.InitActionId  = workflowObject.InitAction.Id;
                    workflowObject.Workflow.CreateTime = DateTime.Now;
                    workflowObject.Workflow.CreateUserId = Context.Staffs.FirstOrDefault<Staff>(s => s.Name == User.Identity.Name).Id;
                    Context.Workflows.Add(workflowObject.Workflow);

                    Context.SaveChanges();
                    t.Commit();
                }
                catch(Exception ex)
                {
                    t.Rollback();
                    ret.Success = false;
                    ret.ErrorMessage = ex.Message;
                }
            }

            return ret;
        }

        public List<entity.workflowDefine.Workflow> GetAllWorkflows()
        {
            return Context.Workflows.Include(d => d.CreateUser).ToList();
        }

        public entity.workflowDefine.Workflow GetWorkflow(int workflowId)
        {
            return Context.Workflows.Include(d=>d.InitAction).Include(d=>d.CreateUser).FirstOrDefault<entity.workflowDefine.Workflow>(w => w.Id == workflowId);
        }

        public List<entity.workflowDefine.Step> GetSteps(int workflowId)
        {
            return Context.Steps.Where<entity.workflowDefine.Step>(w => w.workflowId  == workflowId).ToList();
        }

        public List<entity.workflowDefine.Action> GetActions(int workflowId)
        {
            var workflow = Context.Workflows.FirstOrDefault<entity.workflowDefine.Workflow>(w => w.Id == workflowId);
            return Context.Actions.Where<entity.workflowDefine.Action>(d => d.step.workflowId == workflowId || d.Id == workflow.InitActionId).ToList();
        }

        public List<entity.workflowDefine.TrasferCondition> GetTrasfers(int workflowId)
        {
            return Context.TrasferConditions.Where(d => d.Step.workflowId == workflowId || d.nextStep.workflowId == workflowId).ToList();
        }

    }
}