using System;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Web.Script.Services;
using WebLib;

namespace 報到系統
{
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    [ScriptService]
    public class RoleManageService : System.Web.Services.WebService
    {
        [WebMethod(EnableSession = true)]
        [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
        public BaseResponse SearchEmployees(string keyword)
        {
            try
            {
                if (string.IsNullOrEmpty(keyword))
                {
                    return new BaseResponse
                    {
                        Success = true,
                        Message = "請輸入搜尋關鍵字",
                        Data = new NameValueList()
                    };
                }

                DAC_BPSN dac = new DAC_BPSN();
                var result = dac.Select(keyword);
                return new BaseResponse
                {
                    Success = true,
                    Message = "搜尋成功",
                    Data = result ?? new NameValueList(),
                    TotalCount = result != null ? result.Count : 0
                };
            }
            catch (Exception ex)
            {
                return new BaseResponse
                {
                    Success = false,
                    Message = "搜尋員工失敗：" + ex.Message,
                    Data = new NameValueList()
                };
            }
        }

        [WebMethod(EnableSession = true)]
        [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
        public BaseResponse GetGroupMembers(string groupID)
        {
            try
            {
                if (string.IsNullOrEmpty(groupID))
                {
                    return new BaseResponse
                    {
                        Success = true,
                        Message = "請選擇群組",
                        Data = new NameValueList()
                    };
                }

                DAC_BWEH dac = new DAC_BWEH();
                var result = dac.SelectByGroupId(groupID);
                return new BaseResponse
                {
                    Success = true,
                    Message = "取得成功",
                    Data = result ?? new NameValueList(),
                    TotalCount = result != null ? result.Count : 0
                };
            }
            catch (Exception ex)
            {
                return new BaseResponse
                {
                    Success = false,
                    Message = "取得群組成員失敗：" + ex.Message,
                    Data = new NameValueList()
                };
            }
        }

        [WebMethod(EnableSession = true)]
        [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
        public BaseResponse AddMemberToGroup(string groupID, string[] employeeIDs)
        {
            try
            {
                if (string.IsNullOrEmpty(groupID) || employeeIDs == null || employeeIDs.Length == 0)
                {
                    return new BaseResponse
                    {
                        Success = false,
                        Message = "參數不正確"
                    };
                }

                DAC_BWEH dac = new DAC_BWEH();
                int successCount = 0;
                int totalCount = employeeIDs.Length;

                foreach (string employeeID in employeeIDs)
                {
                    if (dac.AddMemberToGroup(groupID, employeeID))
                    {
                        successCount++;
                    }
                }

                return new BaseResponse
                {
                    Success = successCount > 0,
                    Message = successCount == totalCount 
                        ? $"成功加入 {successCount} 位成員" 
                        : $"成功加入 {successCount} 位成員，失敗 {totalCount - successCount} 位",
                    TotalCount = successCount
                };
            }
            catch (Exception ex)
            {
                return new BaseResponse
                {
                    Success = false,
                    Message = "加入群組失敗：" + ex.Message
                };
            }
        }

        [WebMethod(EnableSession = true)]
        [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
        public BaseResponse RemoveMemberFromGroup(string groupID, string[] employeeIDs)
        {
            try
            {
                if (string.IsNullOrEmpty(groupID) || employeeIDs == null || employeeIDs.Length == 0)
                {
                    return new BaseResponse
                    {
                        Success = false,
                        Message = "參數不正確"
                    };
                }

                DAC_BWEH dac = new DAC_BWEH();
                int successCount = 0;
                int totalCount = employeeIDs.Length;

                foreach (string employeeID in employeeIDs)
                {
                    if (dac.RemoveMemberFromGroup(groupID, employeeID))
                    {
                        successCount++;
                    }
                }

                return new BaseResponse
                {
                    Success = successCount > 0,
                    Message = successCount == totalCount 
                        ? $"成功移除 {successCount} 位成員" 
                        : $"成功移除 {successCount} 位成員，失敗 {totalCount - successCount} 位",
                    TotalCount = successCount
                };
            }
            catch (Exception ex)
            {
                return new BaseResponse
                {
                    Success = false,
                    Message = "移除群組失敗：" + ex.Message
                };
            }
        }
    }
}