using MigraDoc.DocumentObjectModel;
using MigraDoc.DocumentObjectModel.Tables;
using MigraDoc.Rendering;
using PdfSharp.Pdf;
using PdfSharp.Pdf.IO;
using Image = MigraDoc.DocumentObjectModel.Shapes.Image;

namespace AiQ_GUI
{
    internal class PDF
    {
        public const string TestRecordDir = "G:\\Shared drives\\MAV Production Test Records\\AiQ\\";
        public const string ImageDir = $"{GoogleAPI.DrivePath}AiQ\\GUI's\\";
        public static void CreateFinalTestReport(Camera CamOnTest, string UserName, string fulltestvalues, DateTime PCTime)
        {
            // Create a new PDF document
            Document document = new();
            Section section = document.AddSection();

            // Create a table with two columns
            Table latable = section.AddTable();
            latable.Borders.Visible = false; // No visible borders
            latable.AddColumn(Unit.FromCentimeter(13)); // Left column for MAV logo
            latable.AddColumn(Unit.FromCentimeter(3));  // Right column for AiQ logo

            // Add a row for the logos
            Row larow = latable.AddRow();
            Cell cellMAV = larow.Cells[0];
            Cell cellAiQ = larow.Cells[1];

            // Add MAV logo to the left cell
            Image imageMAV = cellMAV.AddImage($"{ImageDir}MAV-Logo.png");
            imageMAV.LockAspectRatio = true;
            imageMAV.Height = Unit.FromCentimeter(1);   // Set height to 1 cm

            // Add AiQ logo to the right cell
            Image imageAiQ = cellAiQ.AddImage($"{ImageDir}AiQ-Logo.png");
            imageAiQ.LockAspectRatio = true;
            imageAiQ.Height = Unit.FromCentimeter(1.25); // Set height to 1 cm

            // Add spacing below the table
            Paragraph tableParagraph = section.AddParagraph();
            tableParagraph.Format.SpaceAfter = "0.5cm";

            // Add Title
            Paragraph title = section.AddParagraph("Certificate of Conformity");
            title.Format.Font.Size = 20;
            title.Format.Font.Bold = true;
            title.Format.Alignment = ParagraphAlignment.Center;
            title.Format.SpaceAfter = "0.15cm";

            // Add SubTitle
            string Subtitle = $"AiQ {CamOnTest.Model} {CamOnTest.Serial}" + (CamOnTest.RMANum != 0 ? $" (RMA {CamOnTest.RMANum})" : "");
            Paragraph subtitle = section.AddParagraph(Subtitle);
            subtitle.Format.Font.Size = 14;
            subtitle.Format.Alignment = ParagraphAlignment.Center;
            subtitle.Format.SpaceAfter = "0.5cm";

            // Add Date
            Paragraph date = section.AddParagraph($"Date: {PCTime}{Environment.NewLine}Engineer: {UserName}{Environment.NewLine}Tested in accordance with MAV.146.060.010.01");
            date.Format.Font.Size = 10;
            date.Format.SpaceAfter = "0.5cm";

            // Add Test Values header
            Paragraph valuesHeader = section.AddParagraph("Test Values:");
            valuesHeader.Format.Font.Size = 14;
            valuesHeader.Format.Font.Bold = true;
            valuesHeader.Format.SpaceAfter = "0.25cm";

            // Add Test Values 
            Paragraph FTV = section.AddParagraph(fulltestvalues);
            FTV.Format.Font.Size = 10;
            FTV.Format.SpaceAfter = "0.5cm";

            // Add Images
            Paragraph imagesHeader = section.AddParagraph("Images:");
            imagesHeader.Format.Font.Size = 14;
            imagesHeader.Format.Font.Bold = true;
            imagesHeader.Format.SpaceAfter = "0.25cm";

            // Create a table with two columns
            Table table = section.AddTable();
            table.Borders.Width = 0; // No border
            table.AddColumn(Unit.FromCentimeter(6)); // Column 1 width
            table.AddColumn(Unit.FromCentimeter(6)); // Column 2 width
            table.AddColumn(Unit.FromCentimeter(6)); // Column 3 width
            table.Rows.Alignment = RowAlignment.Center;

            Row row = table.AddRow();

            // Add IR F16 to the first column
            Cell cell1 = row.Cells[0];
            cell1.Format.Alignment = ParagraphAlignment.Center; // Center horizontally
            cell1.AddParagraph("Infrared - F16.0");
            Image imageIR = cell1.AddImage(LDS.MAVPath + LDS.IRTightsavePath);
            imageIR.LockAspectRatio = true; // Maintain aspect ratio
            imageIR.Width = Unit.FromCentimeter(6); // Scale as needed

            // Add IR F2 to the second column
            Cell cell2 = row.Cells[1];
            cell2.Format.Alignment = ParagraphAlignment.Center; // Center horizontally
            cell2.AddParagraph("Infrared - F2.0");
            Image imageIR17 = cell2.AddImage(LDS.MAVPath + LDS.IROpensavePath);
            imageIR17.LockAspectRatio = true; // Maintain aspect ratio
            imageIR17.Width = Unit.FromCentimeter(6); // Scale as needed

            // Add Image OV to the third column
            Cell cell3 = row.Cells[2];
            cell3.Format.Alignment = ParagraphAlignment.Center; // Center horizontally
            cell3.AddParagraph("Overview");
            Image imageOV = cell3.AddImage(LDS.MAVPath + LDS.OVsavePath);
            imageOV.LockAspectRatio = true; // Maintain aspect ratio
            imageOV.Width = Unit.FromCentimeter(6); // Scale as needed

            section.AddParagraph().Format.SpaceAfter = "0.5cm";

            // Add signiture
            Paragraph Signiture = section.AddParagraph("This unit is approved for shipment by:");
            Signiture.Format.Font.Size = 14;
            Signiture.Format.Alignment = ParagraphAlignment.Right;

            Paragraph paragraph = section.AddParagraph();
            Image image = paragraph.AddImage($"{ImageDir}RP-Sig.jpg");
            image.Height = Unit.FromCentimeter(2);
            image.LockAspectRatio = true;
            paragraph.Format.Alignment = ParagraphAlignment.Right;

            Paragraph PostSig = section.AddParagraph($"Richard Porter{Environment.NewLine}Head of Engineering{Environment.NewLine}MAV Systems Ltd");
            PostSig.Format.Font.Size = 14;
            PostSig.Format.Alignment = ParagraphAlignment.Right;

            try
            {
                // Render PDF
                PdfDocumentRenderer renderer = new()
                {
                    Document = document
                };
                renderer.RenderDocument();
                renderer.PdfDocument.Options.Layout = PdfWriterLayout.Compact;

                // Adds RMA number to file namme if there is one
                string saveLoc = $"{TestRecordDir}{CamOnTest.Model}\\FinalTestReport_{CamOnTest.Model}_{CamOnTest.Serial}_{PCTime:dd-MM-yyyy_HH-mm-ss}" +
                     (CamOnTest.RMANum != 0 ? $" RMA{CamOnTest.RMANum}" : "") + ".pdf";

                if (!Directory.Exists($"{TestRecordDir}{CamOnTest.Model}\\"))         // Does the model directory exist?
                {
                    Directory.CreateDirectory($"{TestRecordDir}{CamOnTest.Model}\\"); // if not then create the directory now
                }

                renderer.PdfDocument.Save(saveLoc);
                Logging.LogMessage("Final Test PDF saved to " + saveLoc);
            }
            catch (Exception ex)
            {
                // Show a message box to inform the user that PDF creation failed, displaying the exception message.
                MainForm.Instance.AddToActionsList($"Failed to create PDF:\n{ex.Message}");
            }
        }

        public static string CreateSoakTestReport(Camera CamSoak, string userName, DateTime pcTime, string logFilePath)
        {
            if (!File.Exists(logFilePath))
            {
                MainForm.Instance.AddToActionsList("Soak log file not found. Cannot create Soak Test Report.");
                return null;
            }

            List<string> logLines = File.Exists(logFilePath) ? File.ReadAllLines(logFilePath).ToList() : new List<string>();

            List<string> errorLines = logLines.Where(l => l.Contains("[ERROR]")).ToList();
            List<string> warningLines = logLines.Where(l => l.Contains("[WARNING]")).ToList();

            // Create PDF document
            Document document = new();
            Section section = document.AddSection();

            // Header table with logos
            Table logoTable = section.AddTable();
            logoTable.Borders.Visible = false;
            logoTable.AddColumn(Unit.FromCentimeter(13)); // Left column
            logoTable.AddColumn(Unit.FromCentimeter(3));  // Right column

            Row logoRow = logoTable.AddRow();
            Cell cellMAV = logoRow.Cells[0];
            Cell cellAiQ = logoRow.Cells[1];

            Image mavLogo = cellMAV.AddImage($"{ImageDir}MAV-Logo.png");
            mavLogo.LockAspectRatio = true;
            mavLogo.Height = Unit.FromCentimeter(1);

            Image aiqLogo = cellAiQ.AddImage($"{ImageDir}AiQ-Logo.png");
            aiqLogo.LockAspectRatio = true;
            aiqLogo.Height = Unit.FromCentimeter(1.25);

            section.AddParagraph().Format.SpaceAfter = "0.5cm";

            // Title
            Paragraph title = section.AddParagraph("Soak Test Certificate");
            title.Format.Font.Size = 20;
            title.Format.Font.Bold = true;
            title.Format.Alignment = ParagraphAlignment.Center;
            title.Format.SpaceAfter = "0.15cm";

            // Subtitle with RMA number if available
            string subtitleText = $"AiQ {CamSoak.Model} {CamSoak.Serial}" + (CamSoak.RMANum != 0 ? $" (RMA {CamSoak.RMANum})" : "");
            Paragraph subtitle = section.AddParagraph(subtitleText);
            subtitle.Format.Font.Size = 14;
            subtitle.Format.Alignment = ParagraphAlignment.Center;
            subtitle.Format.SpaceAfter = "0.5cm";

            // Date and engineer info
            Paragraph datePara = section.AddParagraph($"Date: {pcTime:dd/MM/yyyy HH:mm:ss}{Environment.NewLine}Engineer: {userName}{Environment.NewLine}Tested in accordance with MAV.146.060.020.01");
            datePara.Format.Font.Size = 10;
            datePara.Format.SpaceAfter = "0.5cm";

            // === Add warning/error summary with counts and color ===
            if (warningLines.Count > 0 || errorLines.Count > 0)
            {
                Paragraph logSummary = section.AddParagraph("Log Summary:");
                logSummary.Format.Font.Size = 12;
                logSummary.Format.Font.Bold = true;
                logSummary.Format.SpaceAfter = "0.2cm";

                Paragraph totalCounts = section.AddParagraph();
                totalCounts.Format.Font.Size = 10;
                totalCounts.AddText("Total Errors: ");
                FormattedText errorCountText = totalCounts.AddFormattedText(errorLines.Count.ToString());
                errorCountText.Font.Color = Colors.Red;
                totalCounts.AddText("\nTotal Warnings: ");
                FormattedText warningCountText = totalCounts.AddFormattedText(warningLines.Count.ToString());
                warningCountText.Font.Color = Colors.Orange;
                totalCounts.Format.SpaceAfter = "0.2cm";

                Dictionary<string, int> errorCounts = [];
                Dictionary<string, int> warningCounts = [];

                foreach (string line in errorLines)
                {
                    string message = ExtractLogMessageContent(line);
                    if (errorCounts.TryGetValue(message, out int value))
                        errorCounts[message] = ++value;
                    else
                        errorCounts[message] = 1;
                }

                foreach (string line in warningLines)
                {
                    string message = ExtractLogMessageContent(line);
                    if (warningCounts.TryGetValue(message, out int value))
                        warningCounts[message] = ++value;
                    else
                        warningCounts[message] = 1;
                }

                foreach (KeyValuePair<string, int> ErrorCounter in errorCounts) // Itterates through the dictionary and Adds Errors and how many times that warning has appeared
                {
                    Paragraph errorPara = section.AddParagraph();
                    errorPara.Format.Font.Size = 9;
                    errorPara.AddFormattedText("[", TextFormat.NotBold);
                    FormattedText redText = errorPara.AddFormattedText("ERROR", TextFormat.NotBold);
                    redText.Font.Color = Colors.Red;
                    errorPara.AddFormattedText($"] {ErrorCounter.Key} (x{ErrorCounter.Value})");
                }

                foreach (KeyValuePair<string, int> WarningCounter in warningCounts) // Itterates through the dictionary and Adds warning and how many times that warning has appeared  
                {
                    Paragraph warnPara = section.AddParagraph();
                    warnPara.Format.Font.Size = 9;
                    warnPara.AddFormattedText("[", TextFormat.NotBold);
                    FormattedText orangeText = warnPara.AddFormattedText("WARNING", TextFormat.NotBold);
                    orangeText.Font.Color = Colors.Orange;
                    warnPara.AddFormattedText($"] {WarningCounter.Key} (x{WarningCounter.Value})");
                }

                section.AddParagraph().Format.SpaceAfter = "0.5cm";
            }

            // Signature 
            if (errorLines.Count == 0)
            {
                Paragraph approval = section.AddParagraph("This unit is approved for shipment by:");
                approval.Format.Font.Size = 14;
                approval.Format.Alignment = ParagraphAlignment.Right;

                Paragraph sigPara = section.AddParagraph();
                Image sigImage = sigPara.AddImage($"{ImageDir}RP-Sig.jpg");
                sigImage.Height = Unit.FromCentimeter(2);
                sigImage.LockAspectRatio = true;
                sigPara.Format.Alignment = ParagraphAlignment.Right;

                Paragraph signoff = section.AddParagraph($"Richard Porter{Environment.NewLine}Head of Engineering{Environment.NewLine}MAV Systems Ltd");
                signoff.Format.Font.Size = 14;
                signoff.Format.Alignment = ParagraphAlignment.Right;
            }

            // New page with full log
            Section logSection = document.AddSection();
            Paragraph fullLogTitle = logSection.AddParagraph("Full Log Output:");
            fullLogTitle.Format.Font.Size = 12;
            fullLogTitle.Format.Font.Bold = true;
            fullLogTitle.Format.SpaceAfter = "0.2cm";

            foreach (string line in logLines)
            {
                Paragraph logLine = logSection.AddParagraph();
                logLine.Format.Font.Size = 8;

                if (line.Contains("[ERROR]"))
                {
                    int index = line.IndexOf("[ERROR]"); // You get rid of error only to add it back a few lines later? // this is because its difficukt to change the colour of text your importing its easier to remove and then make red 
                    logLine.AddText(line[..index]);
                    logLine.AddFormattedText("ERROR", TextFormat.NotBold).Font.Color = Colors.Red;
                    logLine.AddText(line[(index + "[ERROR]".Length)..]);
                }
                else if (line.Contains("[WARNING]"))
                {
                    int index = line.IndexOf("[WARNING]"); // You get rid of warning only to add it back a few lines later? // Same here 
                    logLine.AddText(line[..index]);
                    logLine.AddFormattedText("WARNING", TextFormat.NotBold).Font.Color = Colors.Orange;
                    logLine.AddText(line[(index + "[WARNING]".Length)..]);
                }
                else
                {
                    logLine.AddText(line);
                }
            }

            try
            {
                // Render PDF
                PdfDocumentRenderer renderer = new()
                {
                    Document = document
                };
                renderer.RenderDocument();
                renderer.PdfDocument.Options.Layout = PdfWriterLayout.Compact;

                // Construct save path
                string fullPath = TestRecordDir + CamSoak.Model + $"\\SoakTestReport_{CamSoak.Model}_{CamSoak.Serial}_{pcTime:dd-MM-yyyy_HH-mm-ss}" + (CamSoak.RMANum != 0 ? $" RMA{CamSoak.RMANum}" : "") + ".pdf";

                renderer.PdfDocument.Save(fullPath);
                Logging.LogMessage("Soak Test PDF saved to " + fullPath);
                return fullPath;
            }
            catch (Exception ex)
            {
                // Show a message box to inform the user that PDF creation failed, displaying the exception message.
                MainForm.Instance.AddToActionsList($"Failed to create PDF:\n{ex.Message}");
                return null;
            }
        }

        private static string ExtractLogMessageContent(string line)
        {
            int tagEnd = line.IndexOf("] ");
            if (tagEnd != -1)
            {
                return line[(tagEnd + 2)..].Trim();
            }
            return line.Trim();
        }

        public static bool LinkPDFs(string pdf1Path, string pdf2Path, string outputPath)
        {
            bool hasError = false;

            if (!File.Exists(pdf1Path))
            {
                MainForm.Instance.AddToActionsList($"{pdf1Path} does not exist.");
                hasError = true;
            }

            if (!File.Exists(pdf2Path))
            {
                MainForm.Instance.AddToActionsList($"{pdf2Path} does not exist.");
                hasError = true;
            }

            if (hasError)
                return false;

            using PdfDocument outputDocument = new(); // Create a new PDF document
            AppendPdf(outputDocument, pdf1Path);
            AppendPdf(outputDocument, pdf2Path);
            outputDocument.Save(outputPath); // Save the output document
            return true;
        }

        public static void AppendPdf(PdfDocument target, string sourcePath)
        {
            using PdfDocument inputDocument = PdfReader.Open(sourcePath, PdfDocumentOpenMode.Import);

            for (int idx = 0; idx < inputDocument.PageCount; idx++) // Iterate through all pages and add them to the output
            {
                PdfPage page = inputDocument.Pages[idx];
                target.AddPage(page);
            }
        }
    }
}