using HTEXScreen.Service;
using Microsoft.AspNetCore.Mvc;
 
using PuppeteerSharp;
using System.Runtime.InteropServices;
using System.Text;
using System.Text.Json;
using System.Text.RegularExpressions;
using System.Web;

namespace HTEXScreen.Controllers
{
    [ApiController]
    [Route("screen")]
    public class ScreenController : ControllerBase
    {
        private readonly AzureStorageFactory _azureStorage;
        private readonly  HttpClient _httpClient;
        public ScreenController(HttpClient httpClient, AzureStorageFactory  azureStorage) {
            _httpClient = httpClient;
            _azureStorage = azureStorage;
        }
        [HttpPost("testbase64")]
        public async Task<IActionResult> TestBase64(JsonElement json ) {
            JsonSerializerOptions option = new System.Text.Json.JsonSerializerOptions
            {
                Encoder = System.Text.Encodings.Web.JavaScriptEncoder.UnsafeRelaxedJsonEscaping
            };
            string name = "dataid";
            var reg = $"(?<=\\b{name}=)[^&]*";
            Regex regex = new Regex(reg);
            string decode= HttpUtility.UrlDecode("https://localhost:7298/swagger/index.html?dataid=%E5%BC%A0%E5%90%8C%E5%AD%A6&bs64=1234567&dataid=%E6%9D%8E%E5%90%8C%E5%AD%A6");
            Match match= Regex.Match(decode, reg);
            string a = "";
            while (match.Success)
            {
                a =a+$"{match.Value}";
                match = match.NextMatch();
            }
            string s = JsonSerializer.Serialize(json, option);
            string das= HttpUtility.UrlEncode(s,Encoding.UTF8);
            byte[] byts = Encoding.UTF8.GetBytes(s);
            var rdata = Convert.ToBase64String(byts);
            byte[] bs = Convert.FromBase64String(rdata);
            string data = Encoding.UTF8.GetString(bs);
            return Ok(new { a, rdata,das });
        }
        [HttpGet("download")]
        public async Task<IActionResult> Download([FromQuery] ScreenshotDto screenshot) {
            try {
                HttpResponseMessage response = await _httpClient.GetAsync(screenshot.url);
                if (!string.IsNullOrWhiteSpace(screenshot?.url))
                {
                    string? url = screenshot?.url;
                    string[] path = url.Split("/");
                    string fileName = path[path.Length - 1];
                    fileName=HttpUtility.UrlDecode(fileName);
                    Stream stream = response.Content.ReadAsStream();
                    if (!Directory.Exists("Download")){
                        Directory.CreateDirectory("Download");
                    }
                    FileStream fs = new FileStream($"Download/{fileName}", FileMode.Create);
                    byte[] bytes = new byte[stream.Length];
                    stream.Read(bytes, 0, bytes.Length);
                    stream.Seek(0, SeekOrigin.Begin);
                    BinaryWriter bw = new BinaryWriter(fs);
                    bw.Write(bytes);
                    bw.Close();
                    fs.Close();
                    return Ok(screenshot);
                }
                else {
                    return Ok("链接为空");
                }
            } catch (Exception ex) {
                return  Ok($"{ex.Message}{ex.StackTrace}");
            }
        }


        /// <summary>
        /// C#使用Puppeteer  http://t.zoukankan.com/zhaotianff-p-13528507.html
        ///  文档https://learnku.com/docs/puppeteer/3.1.0/class-request/8559
        ///  https://www.w3cschool.cn/puppeteer/puppeteer-gp1737se.html
        /// </summary>
        /// <param name="screenshot"></param>
        /// <returns></returns>
        [HttpGet("screenshot-png")]
        public async Task<IActionResult> ScreenshotPng([FromQuery] ScreenshotDto screenshot)
        {

            //  进入容器的命令 docker exec -it f9e27d175498 /bin/bash

            //依赖包 https://blog.csdn.net/weixin_45447477/article/details/115188938
            //sudo apt-get install  libgdk-pixbuf2.0-0 libgdk-pixbuf-xlib-2.0-0  libdbusmenu-gtk3-4  libdbusmenu-glib4 libindicator3-7  ca-certificates fonts-liberation libappindicator3-1 libasound2 libatk-bridge2.0-0 libatk1.0-0 libc6 libcairo2 libcups2 libdbus-1-3 libexpat1 libfontconfig1 libgbm1 libgcc1 libglib2.0-0 libgtk-3-0 libnspr4 libnss3 libpango-1.0-0 libpangocairo-1.0-0 libstdc++6 libx11-6 libx11-xcb1 libxcb1 libxcomposite1 libxcursor1 libxdamage1 libxext6 libxfixes3 libxi6 libxrandr2 libxrender1 libxss1 libxtst6 lsb-release wget xdg-utils -y
            //解决ubuntu18上使用puppeteer https://blog.csdn.net/qq_42414062/article/details/114539378

            //https://www.hardkoded.com/blog/running-puppeteer-sharp-azure-functions  使用。
            //string url = "https://teammodelos.blob.core.chinacloudapi.cn/0-public/pie-borderRadius.html";
            try
            {
                
                var bfOptions = new BrowserFetcherOptions();
                if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
                {
                    string dir = "/app";
                    if (!Directory.Exists(dir))
                    {
                        Directory.CreateDirectory(dir);
                    }
                    bfOptions.Path = dir;
                }
                var bf = new BrowserFetcher(bfOptions);
                var revisionInfo = bf.DownloadAsync(BrowserFetcher.DefaultChromiumRevision).Result;
                string BrowserExecutablePath = revisionInfo.ExecutablePath;
                var browser = await Puppeteer.LaunchAsync(new LaunchOptions
                {
                    ExecutablePath = BrowserExecutablePath,
                    Headless = true,
                    Args = new string[] { "--no-sandbox", "--disable-setuid-sandbox" }
                });
                var page = await browser.NewPageAsync();
                bool fullPage = true;
                await page.SetViewportAsync(new ViewPortOptions
                {
                    Width = screenshot.width,
                    Height = screenshot.height
                });;
                fullPage = false;
                await page.GoToAsync(System.Web.HttpUtility.UrlDecode(screenshot.url));
                Thread.Sleep(screenshot.delay);
                string base64 = await page.ScreenshotBase64Async(new ScreenshotOptions { FullPage = fullPage, BurstMode = true });
                //关闭浏览器
               await browser.CloseAsync();
               await browser.DisposeAsync();
               return Ok(new { url = base64 ,type= "data:image/png;base64," });
            }
            catch (Exception ex)
            {
                return BadRequest($"{ex.Message}\n{ex.StackTrace}");
            }
        }
        [HttpPost("screenshot-pdf")]
        public async Task<IActionResult> ScreenshotPngs(ScreenshotDto screenshot)
        {

            //W3C School教程 https://www.w3cschool.cn/puppeteer/puppeteer-rip537tj.html
            //  进入容器的命令 docker exec -it f9e27d175498 /bin/bash

            //依赖包 https://blog.csdn.net/weixin_45447477/article/details/115188938
            //sudo apt-get install  libgdk-pixbuf2.0-0 libgdk-pixbuf-xlib-2.0-0  libdbusmenu-gtk3-4  libdbusmenu-glib4 libindicator3-7  ca-certificates fonts-liberation libappindicator3-1 libasound2 libatk-bridge2.0-0 libatk1.0-0 libc6 libcairo2 libcups2 libdbus-1-3 libexpat1 libfontconfig1 libgbm1 libgcc1 libglib2.0-0 libgtk-3-0 libnspr4 libnss3 libpango-1.0-0 libpangocairo-1.0-0 libstdc++6 libx11-6 libx11-xcb1 libxcb1 libxcomposite1 libxcursor1 libxdamage1 libxext6 libxfixes3 libxi6 libxrandr2 libxrender1 libxss1 libxtst6 lsb-release wget xdg-utils -y
            //解决ubuntu18上使用puppeteer https://blog.csdn.net/qq_42414062/article/details/114539378

            //https://www.hardkoded.com/blog/running-puppeteer-sharp-azure-functions  使用。
            //string url = "https://teammodelos.blob.core.chinacloudapi.cn/0-public/pie-borderRadius.html";
            try
            {

                var bfOptions = new BrowserFetcherOptions();
                if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
                {
                    string dir = "/app";
                    if (!Directory.Exists(dir))
                    {
                        Directory.CreateDirectory(dir);
                    }
                    bfOptions.Path = dir;
                }
                var bf = new BrowserFetcher(bfOptions);
                var revisionInfo = bf.DownloadAsync(BrowserFetcher.DefaultChromiumRevision).Result;
                string BrowserExecutablePath = revisionInfo.ExecutablePath;
                var browser = await Puppeteer.LaunchAsync(new LaunchOptions
                {
                    ExecutablePath = BrowserExecutablePath,
                    Headless = true,
                    Args = new string[] { "--no-sandbox", "--disable-setuid-sandbox" }
                });
               
                ViewPortOptions viewPortOptions = new ViewPortOptions
                {
                    Width = screenshot.width,
                    Height = screenshot.height
                };
                PdfOptions pdfOptions = new PdfOptions { DisplayHeaderFooter = true, PreferCSSPageSize =true};
                //ScreenshotOptions screenshotOptions= new ScreenshotOptions { FullPage = fullPage, BurstMode = true };
                
                int pagesize = 20;
                if (screenshot.urls.Count <= pagesize)
                {
                      await PageToPdfStream(screenshot.urls,screenshot.fileNameKey,screenshot.cnt,browser,viewPortOptions,pdfOptions);
                }
                else
                {
                    List<Task> tasks = new List<Task>();
                    int pages = (screenshot.urls.Count + pagesize) / pagesize;
                    for (int i = 0; i < pages; i++)
                    {
                        var lists = screenshot.urls.Skip((i) * pagesize).Take(pagesize).ToList();
                        tasks.Add(PageToPdfStream(lists, screenshot.fileNameKey, screenshot.cnt, browser, viewPortOptions, pdfOptions));
                    }
                    await Task.WhenAll(tasks);
                }
                
                //browser.NewPageAsync();
                //foreach (var url in screenshot.urls) {
                //    var page = await browser.NewPageAsync();
                //    await page.SetViewportAsync(viewPortOptions);

                //    string file = $"E://pdfs//{Guid.NewGuid().ToString()}.pdf";
                //    var respons = await page.GoToAsync(System.Web.HttpUtility.UrlDecode(url), WaitUntilNavigation.Networkidle2);
                //    if (respons.Ok)
                //    {
                //        await page.PdfAsync(file, pdfOptions);
                //        // string base64 = await page.ScreenshotBase64Async(screenshotOptions);
                //    }
                //}

                //关闭浏览器
                await browser.CloseAsync();
                await browser.DisposeAsync();
                return Ok();
            }
            catch (Exception ex)
            {
                return BadRequest($"{ex.Message}\n{ex.StackTrace}");
            }
        }
        private async Task PageToPdfStream(List<string> urls,string fileNameKey,string cnt , Browser browser, ViewPortOptions viewPortOptions, PdfOptions pdfOptions)
        {
            List<Task<Page>> pages = new List<Task<Page>>();
            urls.ForEach(x => {
                pages.Add(browser.NewPageAsync());
            });
            var page_tasks = await Task.WhenAll(pages);
            List<Task<Response>> responses = new List<Task<Response>>();
            page_tasks.ToList().ForEach(x => {
                x.SetViewportAsync(viewPortOptions);

            });
            for (int i = 0; i < urls.Count; i++)
            {
                responses.Add(page_tasks[i].GoToAsync(System.Web.HttpUtility.UrlDecode(urls[i]), WaitUntilNavigation.Networkidle2));
            }
            var responses_tasks = await Task.WhenAll(responses);
            //List<Task<Stream>> streams = new List<Task<Stream>>();
            List<Task> tasks = new List<Task>();
            List<Task<string>> uploads = new List<Task<string>>();
            foreach (var page_task in page_tasks) {
                string url = page_task.Url;
                string[] paths=  HttpUtility.UrlDecode(url).Split("/");
                var reg = $"(?<=\\b{fileNameKey}=)[^&]*";
                Regex regex = new Regex(reg);
                string decode = HttpUtility.UrlDecode(url);
                Match match = Regex.Match(decode, reg);
                string id = "";
                while (match.Success)
                {
                    id = id + $"{match.Value}";
                    match = match.NextMatch();
                }
                //需要解析参数。paths[paths.Length-1]
                Stream stream = await page_task.PdfStreamAsync(pdfOptions);
                if (string.IsNullOrWhiteSpace(cnt))
                {
                    uploads.Add(_azureStorage.GetBlobContainerClient("teammodelos").UploadFileByContainer(stream, "artreport", $"{id}.pdf", true));
                }
                else {
                    uploads.Add(_azureStorage.GetBlobContainerClient(cnt).UploadFileByContainer(stream, "artreport", $"{id}.pdf", true));
                }
            }
            string[]  uploadUrls=   await Task.WhenAll(uploads);
            page_tasks.ToList().ForEach(x => {
                tasks.Add(x.DisposeAsync().AsTask());
            });
            await Task.WhenAll(tasks);
        }
        private async Task PageToPdf(List<string> urls, Browser browser, ViewPortOptions viewPortOptions, PdfOptions pdfOptions)
        {
            List<Task<Page>> pages = new List<Task<Page>>();
            urls.ForEach(x => {
                pages.Add(browser.NewPageAsync());
            });
            var page_tasks = await Task.WhenAll(pages);
            List<Task<Response>> responses = new List<Task<Response>>();
            page_tasks.ToList().ForEach(x => {
                x.SetViewportAsync(viewPortOptions);

            });
            for (int i = 0; i <  urls.Count; i++)
            {
                responses.Add(page_tasks[i].GoToAsync(System.Web.HttpUtility.UrlDecode(urls[i]), WaitUntilNavigation.Networkidle2));
            }
            var responses_tasks = await Task.WhenAll(responses);
            List<Task>  tasks = new List<Task>();
            page_tasks.ToList().ForEach(x => {
                string file = $"{Guid.NewGuid()}.pdf";
                tasks.Add(x.PdfAsync(file, pdfOptions));
            });
            await Task.WhenAll(tasks);
            tasks.Clear();
            page_tasks.ToList().ForEach(x => {
                tasks.Add(x.DisposeAsync().AsTask());
            });
            await Task.WhenAll(tasks);
        }
    }
}

    /// <summary>
    /// 网页截图参数
    /// </summary>
    public class ScreenshotDto
    {
        public int width { get; set; } = 1920;
        public int height { get; set; } = 1080;
        public string? url { get; set; }
        /// <summary>
        /// 批量地址
        /// </summary>
        public List<string> urls { get; set; } = new List<string>();
        /// <summary>
        /// 提取参数的唯一id作为文件名
        /// </summary>
        public string? fileNameKey { get; set; }
        /// <summary>
        /// 存在哪个容器里
        /// </summary>
        public string? cnt { get; set; }
        public int delay { get; set; }
    }