using FrontendWebApi.Models;
using Microsoft.AspNetCore.Mvc;
using Repository.BackendRepository.Interface;
using Repository.FrontendRepository.Interface;
using System.Collections.Generic;
using System.Threading.Tasks;
using System;
using System.IO;
using static FrontendWebApi.Models.Bill;
using Microsoft.Extensions.Logging;
using System.Text.Json;
using Newtonsoft.Json.Linq;
using System.Security.Cryptography;
using WkHtmlToPdfDotNet.Contracts;
using WkHtmlToPdfDotNet;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.SignalR;
using Microsoft.Extensions.Configuration;
using Serilog.Core;
using static FrontendWebApi.ApiControllers.TenantBillController;
using System.Reflection;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using System.Data.SqlTypes;
using System.Linq;




// For more information on enabling Web API for empty projects, visit https://go.microsoft.com/fwlink/?LinkID=397860

namespace FrontendWebApi.ApiControllers
{
    //[Route("api/[controller]")]
    //[ApiController]
    //public class TenantBillController
    public class TenantBillController : MyBaseApiController<TenantBillController>
    {
        private readonly IBackendRepository backendRepository;
        private readonly ILogger<TenantBillController> _logger;
        private readonly IConfiguration Configuration;
        private IWebHostEnvironment _webHostEnvironment;
        private readonly IConverter _converter;


        const string TenantListtable = "archive_electric_meter_tenant_list";
        const string TenantBilltable = "archive_electric_meter_tenant_bill";


        public TenantBillController(IBackendRepository backendRepository, IFrontendRepository frontendRepository, ILogger<TenantBillController> logger,
                       IConfiguration configuration,
                       IWebHostEnvironment webHostEnvironment,
                       IConverter converter)
        {
            this.backendRepository = backendRepository;
            this._logger = logger;
            Configuration = configuration;
            _webHostEnvironment = webHostEnvironment;
            _converter = converter;

        }

        [HttpPost]
        public async Task<ApiResult<List<TenantList>>> GetTenantList()
        {
            ApiResult<List<TenantList>> apiResult = new ApiResult<List<TenantList>>();
            List<TenantList> tenantList = new List<TenantList>();
            try
            {
                var sqlString = $"SELECT tenant_guid,list_id,tenant_name,bill_perKWH,bill_perRCV " +
                    $"from {TenantListtable} order by created_at";

                tenantList = await backendRepository.GetAllAsync<TenantList>(sqlString);


                apiResult.Code = "0000";
                apiResult.Data = tenantList;
            }
            catch (Exception exception)
            {
                apiResult.Code = "9999";
                apiResult.Msg = "讀取不到用戶資料。";
                Logger.LogError("【" + controllerName + "/" + actionName + "】" + exception.Message);
            }

            return apiResult;
        }

        [HttpPost]
        public async Task<ApiResult<string>> AddOneTenantList([FromBody] TenantList tl)
        {
            ApiResult<string> apiResult = new ApiResult<string>();

            try
            {
                var tenant_guid = Guid.NewGuid();
                var tenant_name = tl.tenant_name;
                var bill_perKWH = tl.bill_perKWH;
                var bill_perRCV = tl.bill_perRCV;
                var created_at = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");

                var sqlString = $"INSERT INTO {TenantListtable} (tenant_guid,list_id,tenant_name, bill_perKWH, bill_perRCV, created_by,created_at) " +
                             $"VALUES ('{tenant_guid}','{tl.list_id}','{tenant_name}', {bill_perKWH}, {bill_perRCV},'{tl.created_by}', '{created_at}')";


                await backendRepository.ExecuteSql(sqlString);
                apiResult.Code = "0000";
                apiResult.Msg = "新增成功";
            }
            catch (Exception exception)
            {
                apiResult.Code = "9999";
                apiResult.Msg = "新增用戶失敗。";
                if (exception.Message.Contains($" for key 'PRIMARY'"))
                {
                    apiResult.Code = "0001";
                    apiResult.Msg = "已有相同用戶。";
                }
                Logger.LogError("【" + controllerName + "/" + actionName + "】" + exception.Message);
            }

            return apiResult;
        }

        [HttpPost]
        public async Task<ApiResult<string>> UpdateOneTenantList([FromBody] TenantList tl)
        {
            ApiResult<string> apiResult = new ApiResult<string>();

            try
            {
                var updated_at = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
                var sqlString = $"UPDATE {TenantListtable} SET " +
                             $"`tenant_name` = '{tl.tenant_name}', " +
                             $"`bill_perKWH` = {tl.bill_perKWH}, " +
                             $"`bill_perRCV` = {tl.bill_perRCV}, " +
                             $"`updated_at` = '{updated_at}' " +
                             $"WHERE `tenant_guid` = '{tl.tenant_guid}'";


                await backendRepository.ExecuteSql(sqlString);
                apiResult.Code = "0000";
                apiResult.Msg = "修改用戶成功";
            }
            catch (Exception exception)
            {
                apiResult.Code = "9999";
                apiResult.Msg = "修改失敗。";
                if (exception.Message.Contains($"a foreign key constraint"))
                {
                    apiResult.Code = "0001";
                    apiResult.Msg = "水電報表仍有該用戶，無法修改名稱。";
                }
                Logger.LogError("【" + controllerName + "/" + actionName + "】" + exception.Message);
            }

            return apiResult;
        }

        [HttpPost]
        public async Task<ApiResult<string>> DelOneTenantList([FromBody] TenantList tl)
        {
            ApiResult<string> apiResult = new ApiResult<string>();

            try
            {
                var sqlString = $"delete from {TenantListtable} WHERE tenant_guid = '{tl.tenant_guid}' ";

                await backendRepository.ExecuteSql(sqlString);
                apiResult.Code = "0000";
                apiResult.Msg = "刪除成功";
            }
            catch (Exception exception)
            {
                apiResult.Code = "9999";
                apiResult.Msg = "刪除用戶失敗。";
                if (exception.Message.Contains($"a foreign key constraint"))
                {
                    apiResult.Code = "0001";
                    apiResult.Msg = "水電報表仍有該用戶，無法刪除。";
                }
                Logger.LogError("【" + controllerName + "/" + actionName + "】" + exception.Message);
            }

            return apiResult;
        }


        [HttpPost]
        public async Task<ApiResult<List<TenantBill>>> GetTenantBill([FromBody] TenantBill tb)
        {
            ApiResult<List<TenantBill>> apiResult = new ApiResult<List<TenantBill>>();
            List<TenantBill> tenantBill = new List<TenantBill>();
            try
            {
                string tableType = tb.tableType;
                string building_tag = tb.building_tag;
                string ElecOrWater = tableType == "elec" ? "E4" : "W1";
                string sqlString = null;
                #region 檢查設備是否沒被刪除且正在連接

                string checkDataSql = $@"SELECT device_number,device_name_tag,full_name
                                         FROM device
                                         WHERE device_name_tag = 'E4' and deleted = 0 and is_link = 1 or device_name_tag = 'W1' and deleted = 0 and is_link = 1; ";
                var existData = await backendRepository.GetAllAsync<Device>(checkDataSql);
                string checkDataSql2 = $@"select * from archive_electric_meter_tenant_bill; ";
                var existData2 = await backendRepository.GetAllAsync<TenantBill>(checkDataSql2);
                var commonValues = existData.Select(a => a.device_number)
                        .Intersect(existData2.Select(b => b.device_number))
                        .ToList();
                if (commonValues.Any())
                {
                    string updateSql = $@"UPDATE archive_electric_meter_tenant_bill 
                          SET deleted = 0 
                          WHERE device_number IN ('{string.Join("', '", commonValues)}')";
                    await backendRepository.ExecuteSql(updateSql);
                }
                var newValues = existData.Select(a => a.device_number)
                                           .Except(existData2.Select(b => b.device_number))
                                           .ToList();
                if (newValues.Any())
                {
                    string insertSql = $@"INSERT INTO archive_electric_meter_tenant_bill (device_number, device_name_tag,full_name, created_at)
                                                      SELECT device_number, device_name_tag,full_name, NOW()
                                                      FROM device
                                                      WHERE device_number IN ('{string.Join("', '", newValues)}')";
                    await backendRepository.ExecuteSql(insertSql);
                }
                var deletedValues = existData2.Select(a => a.device_number)
                                            .Except(existData.Select(b => b.device_number))
                                            .ToList();
                if (deletedValues.Any())
                {
                    string updateSql = $@"UPDATE archive_electric_meter_tenant_bill 
                                            SET deleted = 1 
                                            WHERE device_number IN ('{string.Join("', '", deletedValues)}')";
                    await backendRepository.ExecuteSql(updateSql);
                }

                #endregion


                if (building_tag == "D2")
                {
                    sqlString =
                   $"SELECT bill_id,a.device_number,a.full_name,start_timestamp,end_timestamp,result,bill,tenant_name,tenant_guid " +
                   $"from {TenantBilltable} a join device b on a.device_number =b.device_number " +
                   $"where device_building_tag = 'D1' and a.device_name_tag = '{ElecOrWater}' and a.deleted = 0 || device_building_tag = 'D2' and a.device_name_tag = '{ElecOrWater}' and a.deleted = 0";
                }
                else
                {
                    sqlString =
                   $"SELECT bill_id,a.device_number,a.full_name,start_timestamp,end_timestamp,result,bill,tenant_name,tenant_guid " +
                   $"from {TenantBilltable} a join device b on a.device_number =b.device_number " +
                   $"where device_building_tag = '{building_tag}' and a.device_name_tag = '{ElecOrWater}' and a.deleted = 0";
                }


                tenantBill = await backendRepository.GetAllAsync<TenantBill>(sqlString);


                apiResult.Code = "0000";
                apiResult.Data = tenantBill;
            }
            catch (Exception exception)
            {
                apiResult.Code = "9999";
                apiResult.Msg = "讀取水電參考報表失敗。";
                Logger.LogError("【" + controllerName + "/" + actionName + "】" + exception.Message);
            }

            return apiResult;
        }

        [HttpPost]
        public async Task<ApiResult<string>> UpdateTenantBill([FromBody] TenantBill tb)
        {
            ApiResult<string> apiResult = new ApiResult<string>();

            try
            {
                string bill_per = tb.tableType == "elec" ? "bill_perKWH" : "bill_perRCV";
                var updated_at = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss");
                var start_timestamp = tb.start_timestamp;
                var end_timestamp = tb.end_timestamp;
                string sqlString = null;
                string result = "0";

                if (tb.start_timestamp == "" || tb.end_timestamp == "" || tb.tenant_guid == "" || tb.tenant_guid == null)
                {
                    sqlString = $@"UPDATE  {TenantBilltable} 
                              set tenant_name = (SELECT tenant_name from archive_electric_meter_tenant_list 
                              WHERE tenant_guid = '{tb.tenant_guid}'), start_timestamp = '{start_timestamp}',end_timestamp = '{end_timestamp}' ,
                              result= 0, 
                              bill = 0,
                              updated_at = '{updated_at}',
                              tenant_guid = '{tb.tenant_guid}'
                              WHERE device_number = '{tb.device_number}'";

                    await backendRepository.ExecuteSql(sqlString);

                    apiResult.Code = "0000";
                    apiResult.Msg = "資料填寫不完整";
                    return apiResult;
                }
                else
                {
                    List<string> howManyMonth = new List<string>();
                    List<string> existMonth = new List<string>();
                    DateTime date1 = DateTime.Parse(start_timestamp);
                    DateTime date2 = DateTime.Parse(end_timestamp);
                    int monthsApart = ((date2.Year - date1.Year) * 12) + date2.Month - date1.Month;

                    // 找出資料庫存在的水電月份表
                    string checkTabelSql = $@"SELECT TABLE_NAME
                                            FROM INFORMATION_SCHEMA.TABLES 
                                            WHERE TABLE_SCHEMA like 'ibms_dome_%' and TABLE_NAME like 'archive_electric_water_meter_day_%'";
                    var existTable = await backendRepository.GetAllAsync<string>(checkTabelSql);

                    for (var i = 0; i <= monthsApart; i++)
                    {
                        howManyMonth.Add($@"archive_electric_water_meter_day_{date1.AddMonths(i).ToString("yyyyMM")}");
                    }
                    foreach (var item in existTable)
                    {
                        foreach (var data in howManyMonth)
                        {
                            if (item == data)
                            {
                                existMonth.Add(data);
                            }
                        }
                    }
                    if (existMonth.Count == 0)
                    {
                        sqlString = $@"UPDATE  {TenantBilltable} 
                              set tenant_name = (SELECT tenant_name from archive_electric_meter_tenant_list 
                              WHERE tenant_guid = '{tb.tenant_guid}'), start_timestamp = '{start_timestamp}',end_timestamp = '{end_timestamp}' ,
                              result= 0, 
                              bill = 0,
                              updated_at = '{updated_at}',
                              tenant_guid = '{tb.tenant_guid}'
                              WHERE device_number = '{tb.device_number}'";
                    }
                    else
                    {
                        string month = $@"
                                    SELECT start_timestamp,device_number, sub_result 
                                    FROM {existMonth[0]}
                                    WHERE device_number = '{tb.device_number}'";
                        for (var i = 1; i < existMonth.Count; i++)
                        {
                            month += $@"UNION ALL 
                                        SELECT start_timestamp,device_number, sub_result 
                                        FROM {existMonth[i]} 
                                        WHERE device_number = '{tb.device_number}' ";
                        }

                        string checkDataSql = $@"(SELECT sum(sub_result) 
                                FROM (  {month}
                                )  combined_result 
                                WHERE start_timestamp BETWEEN  '{start_timestamp}' and '{end_timestamp}') ";
                        var existData = await backendRepository.GetAllAsync<string>(checkDataSql);
                        if (existData.Count != 0)
                        {
                            result = $@"(SELECT  ROUND(sum(sub_result)) 
                                FROM (  {month}
                                )  combined_result 
                                WHERE start_timestamp BETWEEN  '{start_timestamp}' and '{end_timestamp}') ";
                        }
                        sqlString =
                            $@"UPDATE  {TenantBilltable}  
                                set tenant_name = (SELECT tenant_name from archive_electric_meter_tenant_list WHERE tenant_guid = '{tb.tenant_guid}'), start_timestamp = '{start_timestamp}',end_timestamp = '{end_timestamp}' , 
                                result= {result},
                                bill = ROUND(result *(SELECT {bill_per} from {TenantListtable} WHERE tenant_guid = '{tb.tenant_guid}') ), 
                                updated_at = '{updated_at}', 
                                tenant_guid = '{tb.tenant_guid}' 
                                WHERE device_number = '{tb.device_number}'";
                    }

                    await backendRepository.ExecuteSql(sqlString);

                }
            }
            catch (Exception exception)
            {
                apiResult.Code = "9999";
                apiResult.Msg = "修改水電參考報表失敗。";
                Logger.LogError("【" + controllerName + "/" + actionName + "】" + exception.Message);
                return apiResult;

            }
            apiResult = await CheckDay(tb);
            return apiResult;
        }
        [HttpPost]
        public async Task<ApiResult<string>> CheckDay([FromBody] TenantBill tb)
        {
            ApiResult<string> apiResult = new ApiResult<string>();
            if (tb.start_timestamp != "" && tb.end_timestamp != "" && tb.tenant_guid != "")
            {
                List<TenantBill> tenantBill = new List<TenantBill>();
                try
                {
                    string sqlString = $@"select * from {TenantBilltable} WHERE tenant_guid= '{tb.tenant_guid}' and deleted = 0";

                    tenantBill = await backendRepository.GetAllAsync<TenantBill>(sqlString);
                    if (tenantBill.Count > 1)
                    {
                        foreach (TenantBill t in tenantBill)
                        {
                            if (t.start_timestamp == tb.start_timestamp && t.end_timestamp == tb.end_timestamp)
                            {
                                continue;
                            }
                            else
                            {
                                apiResult.Code = "0001";
                                apiResult.Msg = "該用戶設備的起訖日期不一致，是否將所有設備起訖日期調為一致?";
                                return apiResult;

                            }
                        }

                        apiResult.Code = "0000";
                        apiResult.Msg = "修改成功且該用戶的所有設備日期一致";
                    }
                }
                catch (Exception exception)
                {
                    apiResult.Code = "9999";
                    apiResult.Msg = "確認日期失敗。";
                    Logger.LogError("【" + controllerName + "/" + actionName + "】" + exception.Message);
                }

            }
            apiResult.Code = "0000";
            apiResult.Msg = "修改成功且不執行CheckDay";
            return apiResult;
        }
        [HttpPost]
        public async Task<ApiResult<string>> ChangeDay([FromBody] TenantBill tb)
        {
            ApiResult<string> apiResult = new ApiResult<string>();
            List<TenantBill> tenantBill = new List<TenantBill>();

            try
            {
                string sqlString = $@"select * from {TenantBilltable} WHERE tenant_guid= '{tb.tenant_guid}' and deleted = 0";

                tenantBill = await backendRepository.GetAllAsync<TenantBill>(sqlString);
                foreach (TenantBill t in tenantBill)
                {
                    if (t.start_timestamp == tb.start_timestamp && t.end_timestamp == tb.end_timestamp)
                    {
                        continue;
                    }
                    else
                    {
                        t.start_timestamp = tb.start_timestamp;
                        t.end_timestamp = tb.end_timestamp;
                        t.tableType = t.device_name_tag == "E4" ? "elec": "water";
                        await UpdateTenantBill(t);
                    }
                }


                apiResult.Code = "0000";
                apiResult.Msg = "修改成功";
            }
            catch (Exception exception)
            {
                apiResult.Code = "9999";
                apiResult.Msg = "更換日期失敗。";
                Logger.LogError("【" + controllerName + "/" + actionName + "】" + exception.Message);
            }

            return apiResult;
        }


        [HttpPost]
        public async Task<IActionResult> OutputTenantBill([FromBody] TenantBill tb)
        {
            List<OutputBill> outputBill = new List<OutputBill>();

            try
            {
                List<string> buildings = tb.building_tag_list;
                string building_tag = "";
                foreach (var item in buildings)
                {
                    if (item == buildings[0])
                    {
                        building_tag = item == "D2" ?  $@"device_building_tag = 'D1' and a.deleted = 0 || device_building_tag = '{item}' and a.deleted = 0" : $@"device_building_tag = '{item}' and a.deleted = 0" ;
                    }
                    else
                    {
                        building_tag += item == "D2" ? $@"|| device_building_tag = 'D1' and a.deleted = 0 || device_building_tag = '{item}' and a.deleted = 0" : $@"|| device_building_tag = '{item}' and a.deleted = 0";
                    }
                }
                string checkDataSql = $@"select * from archive_electric_meter_tenant_bill a
									     join device c on a.device_number = c.device_number 
                                         WHERE tenant_name is not null and tenant_guid is not null and tenant_name != '' and tenant_guid !='' 
										 AND ({building_tag})";
                var existData = await backendRepository.GetAllAsync<string>(checkDataSql);
                if (existData.Count != 0)
                {
                    string sqlString =
                        $@"SELECT 
                                tenant_name,
                                start_timestamp,
                                end_timestamp,
                                bill_perKWH,
                                bill_perRCV,
                                elec_result,
                                water_result,
                                bill_perKWH * elec_result AS elec_bill,
                                bill_perRCV * water_result AS water_bill,
                                ROUND(bill_perKWH * elec_result + bill_perRCV * water_result) AS total_bill
                            FROM (
                                SELECT 
                                    a.tenant_name,
                                    MIN(NULLIF(a.start_timestamp, '')) AS start_timestamp,
                                    MAX(NULLIF(a.end_timestamp, '')) AS end_timestamp,
                                    bill_perKWH,
                                    bill_perRCV,
                                    SUM(CASE WHEN a.device_name_tag = 'E4' THEN result ELSE 0 END) AS elec_result,
                                    SUM(CASE WHEN a.device_name_tag = 'W1' THEN result ELSE 0 END) AS water_result
                                FROM archive_electric_meter_tenant_bill a
                                JOIN archive_electric_meter_tenant_list b ON a.tenant_guid = b.tenant_guid 
                                JOIN device c ON a.device_number = c.device_number 
                                WHERE {building_tag} 
                                GROUP BY a.tenant_name
                            ) subquery_alias";

                    outputBill = await backendRepository.GetAllAsync<OutputBill>(sqlString);
                    string filePath = CreateOutputForm(outputBill);

                    byte[] file = System.IO.File.ReadAllBytes(filePath);


                    return new FileContentResult(file, "application/pdf")
                    {
                        FileDownloadName = "水電報表.pdf"
                    };
                }
                else
                {
                    var data = new { Code = "0001",Msg = "還沒有選擇用戶，無法匯出檔案。"};
                    return StatusCode(400, data);
                }
            }
            catch (Exception exception)
            {
                Logger.LogError("【" + controllerName + "/" + actionName + "】" + exception.Message);
            }
            return new FileContentResult(new byte[0], "application/pdf")
            {
                FileDownloadName = "Empty.pdf"
            };
        }

        public string CreateOutputForm(List<OutputBill> outputBill)
        {
            try
            {
                string htmlStr = this.getOutputFormHtmlStr(outputBill);

                string filepath = Configuration.GetValue<string>("FilePath:OutputForm");
                if (!Directory.Exists(filepath))
                {
                    Directory.CreateDirectory(filepath);
                    _logger.LogInformation("file CreateOutputForm path: " + filepath);
                }
                var nowString = DateTime.UtcNow.AddHours(8).ToString("yyyyMMdd_HHmmss");

                //Random r1 = new System.Random();
                //string r2 = r1.Next(0, 999).ToString("0000");
                //string r2 = RandomNumberGenerator.GetInt32(0, 999).ToString("0000");

                filepath += $"{nowString}_水電報表.pdf";

                var doc = new HtmlToPdfDocument()
                {
                    GlobalSettings = {
                    ColorMode = ColorMode.Color,
                    //Orientation = Orientation.Landscape,
                    PaperSize = PaperKind.A4,
                    Out = filepath,
                    Margins = new MarginSettings
                    {
                        Unit = Unit.Millimeters,
                        Top = 10,
                        Bottom = 10,
                        Right = 0,
                        Left = 0
                    },
                },
                    Objects = {
                    new ObjectSettings() {
                        HtmlContent=htmlStr,
                        WebSettings = { DefaultEncoding = "utf-8"},
                        FooterSettings = new FooterSettings() {
                            Center = "第 [page] 頁 共 [topage] 頁",
                            FontName = "DFKai-sb",
                        },
                        LoadSettings = new LoadSettings() {
                            JSDelay = 1000,
                            StopSlowScript = false,
                            BlockLocalFileAccess = false,
                            DebugJavascript = true
                        }
                        //HeaderSettings = { FontSize = 9, Right = "Page [page] of [toPage]", Line = true, Spacing = 2.812 }
                    }
                }
                };

                // _converter.Warning += ConvertWarning;

                _converter.Convert(doc);
                //IntPtr converter = _converter.CreateConverter(doc);
                //_converter.Tools.DestroyConverter();
                return filepath;
            }
            catch (Exception ex)
            {
                throw new Exception(ex.ToString());
            }
        }

        private string getOutputFormHtmlStr(List<OutputBill> outputBill)
        {

            try
            {
                string path = Configuration.GetValue<string>("FilePath:OutputFormTemplate");
                string image = Configuration.GetValue<string>("FilePath:Image");

                //string path = _webHostEnvironment.ContentRootPath + "\\StaticFiles\\import.html";
                if (!System.IO.File.Exists(path))
                {
                    return "";
                }
                //string cssroot = _webHostEnvironment.ContentRootPath + "\\StaticFiles\\css\\";
                string htmlStr = System.IO.File.ReadAllText(path);
                //string vendorscss = System.IO.File.ReadAllText(cssroot + "vendors.bundle.css");
                //string appBundelCss = System.IO.File.ReadAllText(cssroot + "app.bundle.css");
                //string skinmasterCss = System.IO.File.ReadAllText(cssroot + "skins\\skin-master.css");
                string bill = "";
                foreach (var item in outputBill)
                {
                    bill += $"   <div class=\"container a4-page\"> " +
                        $"        <div class=\"header\"> " +
                        $"            <img src=\"{image}\" alt=\"Taipei Dome Logo\" width=\"150\"> " +
                        $"            <h2>水電費用明細</h2> " +
                        $"        </div> " +
                        $"        <div class=\"statistics\"> " +
                        $"            <h3>費用資訊</h3> " +
                        $"            <p><strong>用戶: </strong>{item.tenant_name}</p> " +
                        $"            <p><strong>起訖時間: </strong>{item.start_timestamp} ~ {item.end_timestamp}</p> " +
                        $"            <table class=\"br\"> " +
                        $"                <tr> " +
                        $"                    <td><strong>用電量: </strong>{item.elec_result}度</td> " +
                        $"                    <td><strong>單價: </strong>{item.bill_perKWH}元/度</td> " +
                        $"                    <td><strong>電費總計: </strong>{item.elec_bill}元</td> " +
                        $"                </tr> " +
                        $"                <tr> " +
                        $"                    <td><strong>用水量: </strong>{item.water_result}度</td> " +
                        $"                    <td><strong>單價: </strong>{item.bill_perRCV}元/度</td> " +
                        $"                    <td><strong>水費總計: </strong>{item.water_bill}元</td> " +
                        $"                </tr> " +
                        $"            </table> " +
                        $"            <p style=\"font-size: larger; color: red; text-align: right; margin: 0; padding: 0;\"><strong>總計(費用)：各電/水量加總 * 單價</p> " +
                        $"        </div> " +
                        $"        <div class=\"total\"> " +
                        $"            <div class=\"total-area\"> " +
                        $"                <p>總計金額</p> " +
                        $"                <div class=\"total-box\"> " +
                        $"                    <span class=\"total-money\">{item.total_bill}</span>元 " +
                        $"                </div> " +
                        $"            </div> " +
                        $"        </div> " +
                        $"    </div>";

                }


                htmlStr = htmlStr.Replace("{{bill}}", bill);


                return htmlStr;
            }
            catch (Exception ex)
            {
                throw new Exception(ex.ToString());
            }

        }
    }
}