using DocumentFormat.OpenXml.Wordprocessing;
using MINOM.COM.Utility;
using Model.ViewModel;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using NPOI.SS.UserModel;
using OfficeOpenXml;
using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Http;

/// <summary>
/// statisticsController 的摘要描述
/// </summary>
public class statisticsController: ApiController
{
    //獲取於活動統計相關的數據

    private Model.ezEntities _db = new Model.ezEntities();
    public statisticsController()
    {
        //
        // TODO: 在這裡新增建構函式邏輯
        //
    }
    [HttpPost]
    [Route("api/statistics/activitylist")]
    public IHttpActionResult GetStatisticsActivityList()
    {
        //獲取活動列表
        var activityList = _db.activities.OrderByDescending(x => x.reg_time).ToList();
        return Ok(activityList);
    }
    [HttpPost]
    [Route("api/statistics/activitycountlist")]
    public IHttpActionResult GetActivityCountList(int page=1,int pagesize=10, [FromUri] string[] sortby = null, [FromUri] bool[] sortdesc = null )
    {
        //獲取多個活動統計列表，如果一個獲取超過五十個，則返回空
        if (pagesize > 50)
        {
            return Ok();
        }
        var qry = _db.activities.OrderByDescending(x => x.reg_time);
        var data = qry.Skip((page - 1) * pagesize).Take(pagesize).ToList();
        var list = new
        {
            items = data.Select(x => new
            {
                id = x.num,
                order_count = x.pro_order.Count(),
                pw_count = x.pro_order.SelectMany(b => b.pro_order_detail).Count(),
                activity_name = x.subject,
                receivable = x.pro_order.SelectMany(a => a.pro_order_detail).Select(c => c.price).Sum(),
                startdate = x.startDate_solar,
                enddate = x.endDate_solar,
                //register_status = EnumHelper.GetDescription((ActivityRegisterStatus)x.ActivityRegisterStatus),
                //hold_status = EnumHelper.GetDescription((ActivityHoldStatus)x.ActivityHoldStatus),
                //gdz_peoples = x.pro_order.SelectMany(a => a.pro_order_detail).Where(b => b.actItem?.actItem_kind?.IsGDZ == true).Count(),
            }),
            count =qry.Count()
        };
        return Ok(list);
    }
    [HttpPost]
    [Route("api/statistics/activitycount")]
    public IHttpActionResult GetActivityCount(int id)
    {
        //獲取單個活動統計數據
        var qry = _db.activities.Where(a => a.num == id);
        if (qry == null)
        {
            return Ok();
        }
        var data = new
        {
            list = qry.Select(a => new
            {
                id = a.num,
                order_count = a.pro_order.Count(),
                order_price_total = a.pro_order.SelectMany(b => b.pro_order_detail).Select(c => c.price).Sum()
            })


        };
        return Ok(data);
    }

    [HttpPost]
    [Route("api/statistics/GDZCount")]
    public IHttpActionResult GetActivityGDZCount(int activity_num)
    {
        var qry = _db.pro_order_detail.Include("follower").Where(a => a.pro_order.activity_num == activity_num);
        if (qry == null)
        {
            return Ok();
        }
        var data = new
        {
            all_count = _db.pro_order.Where(a => a.activity_num == activity_num).Count(),
            all_gdz_count = qry
                            .Where(a => a.actItem.act_bom.Any(b => b.package_num == null && b.item_num == a.actItem_num))
                            .Select(a => a.order_no)
                            .Distinct()
                            .Count(),
            gdz_item_counts = qry.Where(a => !a.actItem.subject.Contains("大牌位"))       
                .GroupBy(a => new
                {
                    item_num = a.actItem.num,
                    item_name = a.actItem.subject,
                    price = a.actItem.price
                })
                .Select(g => new
                {
                    item_num = g.Key.item_num,
                    item_name = g.Key.item_name,
                    price = g.Key.price,
                    count = g.Count(),//功德項目的數量
                    total_price = g.Where(x => x.price != null).Sum(x => x.price),
                    // ⚠️ 潛在 N+1 查詢：在 GroupBy 投影中執行新查詢
                    // g.Select(...).ToList() 會立即執行，然後用 Contains 做子查詢
                    // 若 g 數量很多，建議重構為 join 或分兩階段查詢以提升效能
                    followers = _db.pro_order
                             .Where(h => g.Select(x => x.order_no).Distinct().ToList().Contains(h.order_no))
                             .Select(k => k.follower.u_name)
                             .Distinct()
                             .ToList(),

                    amountsByFollower = g
                                        .GroupBy(x => x.pro_order.follower.u_name)
                                        .Select(fg => new
                                        {
                                            follower = fg.Key,
                                            amount = fg.Where(x => x.price != null).Sum(x => x.price)
                                        })
                                        .ToList()
                })
                .OrderByDescending(x => x.price)
                .ToList()

        };
        return Ok(data);
    }


    [HttpPost]
    [Route("api/statistics/GetStatistic")]
    public IHttpActionResult GetStatistic(string statistic_mode)
    {
        try
        {
            var drafts = (from a in _db.transfer_register
                         select a).ToList();

            string rootPath = HttpRuntime.AppDomainAppPath;
            string name = $"output{DateTime.Now.ToString("yyyyMMddHHmmss")}.xlsx";
            string fileName = Path.Combine(new string[] { rootPath, "rpt", name });

            var file = new FileInfo($"{fileName}"); // 檔案路徑
            using (var excel = new ExcelPackage())
            {
                LogUtility log = new LogUtility();
                // 建立分頁
                var ws = excel.Workbook.Worksheets.Add("MySheet");
                var data = (from a in _db.activities
                            join b in _db.pro_order on a.num equals b.activity_num
                            join c in _db.pro_order_detail on b.order_no equals c.order_no
                            //join d in _db.activity_relating on a.num equals d.activity_num
                            join f in _db.actItems on c.actItem_num equals f.num
                            select new
                            {
                                a.num,
                                a.subject,
                                b.order_no,
                                b.f_num,
                                order_detail_num = c.num,
                                c.actItem_num,
                                item_subject = f.subject,
                                c.qty,
                                c.price
                            }).ToList();

                int i = 0;
                i++;
                if (statistic_mode == "01")
                {
                    ws.Cells[i, 1].Value = "序號";
                    ws.Cells[i, 2].Value = "法會名稱";
                    ws.Cells[i, 3].Value = "功德項目";
                    ws.Cells[i, 4].Value = "數量";
                    ws.Cells[i, 5].Value = "單價";
                    ws.Cells[i, 6].Value = "小計";
                    ws.Cells[i, 7].Value = "實收";
                    ws.Cells[i, 8].Value = "應收";
                    ws.Cells[i, 9].Value = "應付";
                    i++;
                    var list = data.GroupBy(x => new { x.num, x.subject, x.actItem_num, x.item_subject }).Select(y =>
                    new
                    {
                        y.Key.num,
                        y.Key.subject,
                        y.Key.actItem_num,
                        y.Key.item_subject,
                        qty = y.Where(q => q.num == y.Key.num && q.actItem_num == y.Key.actItem_num).Select(q => q.qty).Sum(),
                        price = y.Where(p => p.num == y.Key.num && p.actItem_num == y.Key.actItem_num).Select(p => p.price).FirstOrDefault()
                    }).ToList();
                    foreach (var item in list)
                    {
                        ws.Cells[i, 1].Value = i - 1;
                        ws.Cells[i, 2].Value = item.subject;
                        ws.Cells[i, 3].Value = item.item_subject;
                        ws.Cells[i, 4].Value = item.qty.Value;
                        ws.Cells[i, 5].Value = item.price.Value;
                        ws.Cells[i, 6].Formula = $"=D{i}*E{i}";
                      
                        var draftList = (from a in drafts
                                         where a.activity_num == item.num
                                         select a).ToList();
                        decimal payed = 0;
                        foreach (var items in draftList)
                        {
                            if (items.draft != null)
                            {
                                var jj = JsonConvert.DeserializeObject<JArray>(items.draft);
                                log.writeLogPath(jj.ToString());
                                foreach (var j in jj)
                                {
                                    if (item.subject == j["activity_name"].ToString() &&
                                       item.item_subject == j["actitem_name"].ToString())
                                    {
                                        payed = payed + decimal.Parse(j["reconcile"].ToString());
                                    }
                                }

                            }
                        }
                        ws.Cells[i, 7].Value = payed;
                        ws.Cells[i, 8].Formula = $"=if(F{i}>G{i},F{i}-G{i},0)";
                        ws.Cells[i, 9].Formula = $"=if(F{i}<G{i},G{i}-F{i},0)";

                        i++;
                    }

                }
                else if (statistic_mode == "02")
                {
                    var list = (from a in _db.pro_order
                                join b in _db.pro_order_detail on a.order_no equals b.order_no
                                join c in _db.followers on a.f_num equals c.num
                                join d in _db.activities on a.activity_num equals d.num
                                select new
                                {
                                    a.order_no,
                                    a.f_num,
                                    a.activity_num,
                                    b.qty,
                                    b.price,
                                    c.u_name
                                }).ToList();
                    ws.Cells[i, 1].Value = "序號";
                    ws.Cells[i, 2].Value = "信眾編號";
                    ws.Cells[i, 3].Value = "信眾姓名";
                    ws.Cells[i, 4].Value = "總金額";
                    ws.Cells[i, 5].Value = "實收";
                    ws.Cells[i, 6].Value = "應收";
                    ws.Cells[i, 7].Value = "應付";
                    i++;
                    var g = list.GroupBy(y => new { y.f_num, y.u_name }).Select(y => new
                    {
                        y.Key.f_num,
                        y.Key.u_name,
                        total = y.Where(x => x.f_num == y.Key.f_num).Select(x => x.price * x.qty).Sum()
                    });
                    foreach (var item in g)
                    {
                        ws.Cells[i, 1].Value = i - 1;
                        ws.Cells[i, 2].Value = item.f_num;
                        ws.Cells[i, 3].Value = item.u_name;
                        ws.Cells[i, 4].Value = item.total;
                        var dd = (from a in drafts
                                  where a.f_num == item.f_num
                                  select a).ToList();
                        decimal payed = 0;
                        foreach (var d in dd)
                        {
                            payed = payed + (decimal)d.check_amount;// -(decimal)d.remain_amount;
                        }
                        ws.Cells[i, 5].Value = payed;
                        ws.Cells[i, 6].Formula = $"=if(D{i}>E{i},D{i}-E{i},0)";
                        ws.Cells[i, 7].Formula = $"=if(D{i}<E{i},E{i}-D{i},0)";
                        i++;
                    }
                }
                else if (statistic_mode == "03")
                {
                    var list = (from a in _db.activities
                               join b in _db.pro_order on a.num equals b.activity_num
                               join c in _db.pro_order_detail on b.order_no equals c.order_no
                               join d in _db.followers on b.f_num equals d.num
                               select new
                               {
                                   a.num,a.subject,b.order_no,order_detail_num=c.num,
                                   b.f_num,d.u_name,c.price,c.qty
                               }).ToList();
                    ws.Cells[i, 1].Value = "序號";
                    ws.Cells[i, 2].Value = "法會名稱";
                    ws.Cells[i, 3].Value = "信眾姓名";
                    ws.Cells[i, 4].Value = "總金額";
                    ws.Cells[i, 5].Value = "實收";
                    ws.Cells[i, 6].Value = "應收";
                    ws.Cells[i, 7].Value = "應付";
                    i++;
                    var g = list.GroupBy(y => new { y.num, y.subject, y.f_num, y.u_name }).Select(y=>new
                    {
                        y.Key.num,y.Key.subject,y.Key.f_num,y.Key.u_name,
                        total=y.Where(x=>x.num==y.Key.num&&x.f_num==y.Key.f_num).Select(x=>x.price*x.qty).Sum()
                    });
                    foreach (var item in g)
                    {
                        ws.Cells[i, 1].Value = i - 1;
                        ws.Cells[i, 2].Value = item.subject;
                        ws.Cells[i, 3].Value = item.u_name;
                        ws.Cells[i, 4].Value = item.total;
                        var dd = drafts.Where (y=>y.activity_num==item.num&&y.f_num==item.f_num).
                            Select(y => new { y.check_amount, y.remain_amount }).ToList();

                        ws.Cells[i, 5].Value = dd.Sum(y=>y.check_amount);
                        ws.Cells[i, 6].Formula = $"=if(D{i}>E{i},D{i}-E{i},0)";
                        ws.Cells[i, 7].Formula = $"=if(D{i}<E{i},E{i}-D{i},0)";
                        i++;
                    }
                }

                    // 儲存 Excel
                    excel.SaveAs(file);
            }

            return Ok(new { result = "Y", filename = $"rpt/{name}" });
        }
        catch (Exception ex)
        {
            return Ok(new { result = "N", message = ex.Message});
            //return BadRequest($"{ex.Message}{ex.StackTrace}");
        }
    }
    
}