using DocumentFormat.OpenXml;
using DocumentFormat.OpenXml.Packaging;
using DocumentFormat.OpenXml.Wordprocessing;
using Microsoft.AspNetCore.Hosting;
using OpenAuth.Repository.Domain;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace OpenAuth.App.Common
{
    public class MiWordHelper
    {
        #region
        public string GenerateSeizureDocumentWord(MiSeizureDocument mr, IWebHostEnvironment env)
        {
            string templatePath = Path.Combine(env.ContentRootPath, "Templates", "扣押财物决定书.docx");
            if (!File.Exists(templatePath))
                throw new FileNotFoundException("模板文件不存在", templatePath);

            string fileName = $"扣押财物决定书_{mr.Id}.docx";
            string uploadDir = Path.Combine(env.ContentRootPath, "upload");
            if (!Directory.Exists(uploadDir))
                Directory.CreateDirectory(uploadDir);
            string outputPath = Path.Combine(uploadDir, fileName);
            File.Copy(templatePath, outputPath, true);

            using (WordprocessingDocument wordDoc = WordprocessingDocument.Open(outputPath, true))
            {
                Body body = wordDoc.MainDocumentPart.Document.Body;
                ReplacePlaceholders(body, mr);
                wordDoc.MainDocumentPart.Document.Save();
            }
            return $"/upload/{fileName}";
        }

        private void ReplacePlaceholders(Body body, MiSeizureDocument mr)
        {
            // 准备替换值
            string party = mr.Party ?? "";
            string clueLocation = mr.ClueLocation ?? "";
            string violationType = mr.ViolationType ?? "";
            string year = mr.Year ?? DateTime.Now.Year.ToString();
            string serialNumber = mr.SerialNumber.ToString("D3");
            int month = mr.SeizureDate?.Month ?? 0;
            int day = mr.SeizureDate?.Day ?? 0;
            string monthStr = month > 0 ? month.ToString() : "";
            string dayStr = day > 0 ? day.ToString() : "";

            var paragraphs = body.Elements<Paragraph>().ToList();

            for (int i = 0; i < paragraphs.Count; i++)
            {
                Paragraph para = paragraphs[i];
                string paraText = para.InnerText;

                // 处理物品列表占位符 {{Items}}
                if (paraText.Contains("{{Items}}"))
                {
                    ParagraphProperties paraProps = para.ParagraphProperties?.CloneNode(true) as ParagraphProperties;

                    var runs = para.Elements<Run>().ToList();
                    RunProperties indexRunProps = null;   // 序号部分的样式
                    RunProperties contentRunProps = null; // 内容部分的样式

                    // 找到包含 "{{Items}}" 的 Run 作为内容 Run
                    Run contentRun = runs.FirstOrDefault(r => r.InnerText.Contains("{{Items}}"));
                    if (contentRun?.RunProperties != null)
                        contentRunProps = contentRun.RunProperties.CloneNode(true) as RunProperties;

                    // 取第一个 Run 作为序号 Run（假设序号在最前面）
                    Run indexRun = runs.FirstOrDefault();
                    if (indexRun != null && indexRun != contentRun && indexRun.RunProperties != null)
                        indexRunProps = indexRun.RunProperties.CloneNode(true) as RunProperties;

                    para.Remove();
                    InsertItemsParagraphs(body, i, mr.Items, paraProps, indexRunProps, contentRunProps);
                    ReplacePlaceholders(body, mr); // 重新开始循环
                    return;
                }

                // 处理普通占位符替换
                foreach (var run in para.Elements<Run>())
                {
                    Text text = run.Elements<Text>().FirstOrDefault();
                    if (text == null) continue;

                    string original = text.Text;
                    string replaced = original
                        .Replace("{{Party}}", party)
                        .Replace("{{ClueLocation}}", clueLocation)
                        .Replace("{{Year}}", year)
                        .Replace("{{Month}}", monthStr)
                        .Replace("{{Day}}", dayStr)
                        .Replace("{{SerialNumber}}", serialNumber)
                        .Replace("{{ViolationType}}", violationType); // 方括号形式

                    if (original != replaced)
                        text.Text = replaced;
                }
            }
        }

        private void InsertItemsParagraphs(Body body, int insertIndex, string itemsStr,
            ParagraphProperties templateParaProps,
            RunProperties indexRunProps,
            RunProperties contentRunProps)
        {
            string[] items = itemsStr.Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries);

            for (int i = 0; i < items.Length; i++)
            {
                string indexText = $"{i + 1}、 ";
                string rawContent = items[i].Trim();
                int leadingSpaces = 6;
                int trailingSpaces = 30 - leadingSpaces - rawContent.Length;
                if (trailingSpaces < 0) trailingSpaces = 0;
                string contentText = new string(' ', leadingSpaces) + rawContent + new string(' ', trailingSpaces);

                Paragraph newPara = new Paragraph();
                if (templateParaProps != null)
                    newPara.ParagraphProperties = (ParagraphProperties)templateParaProps.CloneNode(true);

                // 序号 Run（移除可能的下划线）
                Run indexRun = new Run();
                if (indexRunProps != null)
                {
                    indexRun.RunProperties = (RunProperties)indexRunProps.CloneNode(true);
                    if (indexRun.RunProperties.Underline != null)
                        indexRun.RunProperties.Underline.Remove();
                }
                // 关键：设置 Space 为 Preserve 以保留空格
                indexRun.AppendChild(new Text(indexText) { Space = SpaceProcessingModeValues.Preserve });
                newPara.AppendChild(indexRun);

                // 内容 Run（强制黑色下划线）
                Run contentRun = new Run();
                if (contentRunProps != null)
                {
                    contentRun.RunProperties = (RunProperties)contentRunProps.CloneNode(true);
                    if (contentRun.RunProperties.Color == null)
                        contentRun.RunProperties.Color = new Color() { Val = "000000" };
                    else
                        contentRun.RunProperties.Color.Val = "000000";
                    if (contentRun.RunProperties.Underline == null)
                        contentRun.RunProperties.Underline = new Underline() { Val = UnderlineValues.Single };
                }
                else
                {
                    contentRun.RunProperties = new RunProperties();
                    contentRun.RunProperties.Underline = new Underline() { Val = UnderlineValues.Single };
                    contentRun.RunProperties.Color = new Color() { Val = "000000" };
                }
                // 关键：设置 Space 为 Preserve 以保留前后空格
                contentRun.AppendChild(new Text(contentText) { Space = SpaceProcessingModeValues.Preserve });
                newPara.AppendChild(contentRun);

                body.InsertAt(newPara, insertIndex + i);
            }
        }
        #endregion
        #region 解除扣押
        public string GenerateReleaseDocumentWord(MiReleaseDocument rd, IWebHostEnvironment env)
        {
            string templatePath = Path.Combine(env.ContentRootPath, "Templates", "解除扣押决定书.docx");
            if (!File.Exists(templatePath))
                throw new FileNotFoundException("模板文件不存在", templatePath);

            string fileName = $"解除扣押决定书_{rd.Id}.docx";
            string uploadDir = Path.Combine(env.ContentRootPath, "upload");
            if (!Directory.Exists(uploadDir))
                Directory.CreateDirectory(uploadDir);
            string outputPath = Path.Combine(uploadDir, fileName);
            File.Copy(templatePath, outputPath, true);

            using (WordprocessingDocument wordDoc = WordprocessingDocument.Open(outputPath, true))
            {
                Body body = wordDoc.MainDocumentPart.Document.Body;
                ReplacePlaceholdersForRelease(body, rd);
                wordDoc.MainDocumentPart.Document.Save();
            }
            return $"/upload/{fileName}";
        }

        private void ReplacePlaceholdersForRelease(Body body, MiReleaseDocument rd)
        {
            // 准备替换值
            string party = rd.Party ?? "";
            string clueLocation = rd.ClueLocation ?? "";
            string violationType = rd.ViolationType ?? "";
            string year = rd.Year ?? DateTime.Now.Year.ToString();
            string serialNumber = rd.SerialNumber.ToString("D3");

            // 解除扣押决定日期（落款）
            int rYear = rd.ReleaseDate?.Year ?? 0;
            int rMonth = rd.ReleaseDate?.Month ?? 0;
            int rDay = rd.ReleaseDate?.Day ?? 0;
            string rYearStr = rYear > 0 ? rYear.ToString() : "";
            string rMonthStr = rMonth > 0 ? rMonth.ToString() : "";
            string rDayStr = rDay > 0 ? rDay.ToString() : "";

            // 领取截止日期
            int pYear = rd.PickupDeadline?.Year ?? 0;
            int pMonth = rd.PickupDeadline?.Month ?? 0;
            int pDay = rd.PickupDeadline?.Day ?? 0;
            string pYearStr = pYear > 0 ? pYear.ToString() : "";
            string pMonthStr = pMonth > 0 ? pMonth.ToString() : "";
            string pDayStr = pDay > 0 ? pDay.ToString() : "";

            // 扣押财物日期（来自实体类 SeizureData）
            int fYear = rd.SeizureData?.Year ?? 0;
            int fMonth = rd.SeizureData?.Month ?? 0;
            int fDay = rd.SeizureData?.Day ?? 0;
            string fYearStr = fYear > 0 ? fYear.ToString() : "";
            string fMonthStr = fMonth > 0 ? fMonth.ToString() : "";
            string fDayStr = fDay > 0 ? fDay.ToString() : "";

            string parkingLot = rd.ParkingLot ?? "";

            var paragraphs = body.Elements<Paragraph>().ToList();

            for (int i = 0; i < paragraphs.Count; i++)
            {
                Paragraph para = paragraphs[i];
                string paraText = para.InnerText;

                // 处理物品列表占位符 {{Items}}
                if (paraText.Contains("{{Items}}"))
                {
                    ParagraphProperties paraProps = para.ParagraphProperties?.CloneNode(true) as ParagraphProperties;

                    var runs = para.Elements<Run>().ToList();
                    RunProperties indexRunProps = null;
                    RunProperties contentRunProps = null;

                    // 找到包含 "{{Items}}" 的 Run 作为内容 Run
                    Run contentRun = runs.FirstOrDefault(r => r.InnerText.Contains("{{Items}}"));
                    if (contentRun?.RunProperties != null)
                        contentRunProps = contentRun.RunProperties.CloneNode(true) as RunProperties;

                    // 取第一个 Run 作为序号 Run（假设序号在最前面）
                    Run indexRun = runs.FirstOrDefault();
                    if (indexRun != null && indexRun != contentRun && indexRun.RunProperties != null)
                        indexRunProps = indexRun.RunProperties.CloneNode(true) as RunProperties;

                    para.Remove();
                    InsertItemsParagraphs(body, i, rd.Items, paraProps, indexRunProps, contentRunProps);
                    ReplacePlaceholdersForRelease(body, rd); // 重新开始循环
                    return;
                }

                // 处理普通占位符替换
                foreach (var run in para.Elements<Run>())
                {
                    Text text = run.Elements<Text>().FirstOrDefault();
                    if (text == null) continue;

                    string original = text.Text;
                    string replaced = original
                        .Replace("{{Year}}", year)          // 文书编号年份
                        .Replace("{{SerialNumber}}", serialNumber)
                        .Replace("{{Paty}}", party)         // 注意模板拼写为 Paty
                        .Replace("{{ClueLocation}}", clueLocation)
                        .Replace("{{ViolationType}}", violationType)
                        .Replace("{{FYear}}", fYearStr)
                        .Replace("{{FMonth}}", fMonthStr)
                        .Replace("{{FDay}}", fDayStr)
                        .Replace("{{PYear}}", pYearStr)
                        .Replace("{{Pmonth}}", pMonthStr)   // 注意大小写
                        .Replace("{{Pday}}", pDayStr)
                        .Replace("{{ParkingLot}}", parkingLot)
                        .Replace("{{Month}}", rMonthStr)    // 落款月份
                        .Replace("{{Day}}", rDayStr);        // 落款日

                    if (original != replaced)
                        text.Text = replaced;
                }
            }
        }

        //private void InsertItemsParagraphs(Body body, int insertIndex, string itemsStr,
        //    ParagraphProperties templateParaProps,
        //    RunProperties indexRunProps,
        //    RunProperties contentRunProps)
        //{
        //    string[] items = itemsStr.Split(new[] { ';' }, StringSplitOptions.RemoveEmptyEntries);

        //    for (int i = 0; i < items.Length; i++)
        //    {
        //        string indexText = $"{i + 1}、 ";
        //        string rawContent = items[i].Trim();
        //        int leadingSpaces = 6;
        //        int trailingSpaces = 30 - leadingSpaces - rawContent.Length;
        //        if (trailingSpaces < 0) trailingSpaces = 0;
        //        string contentText = new string(' ', leadingSpaces) + rawContent + new string(' ', trailingSpaces);

        //        Paragraph newPara = new Paragraph();
        //        if (templateParaProps != null)
        //            newPara.ParagraphProperties = (ParagraphProperties)templateParaProps.CloneNode(true);

        //        // 序号 Run（移除可能的下划线）
        //        Run indexRun = new Run();
        //        if (indexRunProps != null)
        //        {
        //            indexRun.RunProperties = (RunProperties)indexRunProps.CloneNode(true);
        //            if (indexRun.RunProperties.Underline != null)
        //                indexRun.RunProperties.Underline.Remove();
        //        }
        //        // 关键：设置 Space 为 Preserve 以保留空格
        //        indexRun.AppendChild(new Text(indexText) { Space = SpaceProcessingModeValues.Preserve });
        //        newPara.AppendChild(indexRun);

        //        // 内容 Run（强制黑色下划线）
        //        Run contentRun = new Run();
        //        if (contentRunProps != null)
        //        {
        //            contentRun.RunProperties = (RunProperties)contentRunProps.CloneNode(true);
        //            if (contentRun.RunProperties.Color == null)
        //                contentRun.RunProperties.Color = new Color() { Val = "000000" };
        //            else
        //                contentRun.RunProperties.Color.Val = "000000";
        //            if (contentRun.RunProperties.Underline == null)
        //                contentRun.RunProperties.Underline = new Underline() { Val = UnderlineValues.Single };
        //        }
        //        else
        //        {
        //            contentRun.RunProperties = new RunProperties();
        //            contentRun.RunProperties.Underline = new Underline() { Val = UnderlineValues.Single };
        //            contentRun.RunProperties.Color = new Color() { Val = "000000" };
        //        }
        //        // 关键：设置 Space 为 Preserve 以保留前后空格
        //        contentRun.AppendChild(new Text(contentText) { Space = SpaceProcessingModeValues.Preserve });
        //        newPara.AppendChild(contentRun);

        //        body.InsertAt(newPara, insertIndex + i);
        //    }
        //}
        #endregion
    }
}