var decodeEntities = (function() {
  // this prevents any overhead from creating the object each time
  var element = document.createElement('div');

  function decodeHTMLEntities (str) {
    if(str && typeof str === 'string') {
      // strip script/html tags
      str = str.replace(/<script[^>]*>([\S\s]*?)<\/script>/gmi, '');
      str = str.replace(/<\/?\w(?:[^"'>]|"[^"]*"|'[^']*')*>/gmi, '');
      element.innerHTML = str;
      str = element.textContent;
      element.textContent = '';
    }

    return str;
  }

  return decodeHTMLEntities;
})();

$(document).ready(function () {

    // Export content as HTML
    $('#editDownloadHtml').click(function () {
        var htmlContent = $('#editFrameTest');
        downloadFile(htmlContent, 'content.html', 'text/html');
    });

    // Export content as plain text
    $('#editDownloadText').click(function () {
        //var plainTextContent = $('#editor').trumbowyg('html').replace(/<[^>]*>/g, '');
        var plainTextContent = decodeEntities($('#editFrameTest')); 
        downloadFile(plainTextContent, 'content.txt', 'text/plain');
    });

    // Quit back to Filemanager.
    $('#editQuit').click(function () {
	history.back();
    });

    // Save buffer and continue editting.
    $('#editSave').click(function () {
        saveFile();
    });

    // Save buffer and exit.
    $('#editExit').click(function () {
        saveFile();
        history.back();
    });

    // Save buffer and apply configuration.
    $('#editApply').click(function () {
        const statusDiv = document.getElementById('saveStatus');

	// Updated changes.
        saveFile();

	// Reload ESP32, if the config has changed then it will initiate an RP2350 config reload.
        setTimeout(function() {
            const statusDiv  = document.getElementById('saveStatus');
            if (statusDiv) {
                statusDiv.style.backgroundColor = "#fff3cd";
                statusDiv.style.color = "#856404";
                statusDiv.innerHTML = "Requesting ESP32 reload configuration,,,)";
            }
            setTimeout(function() {
                window.location.href="/reboot/esp32";
            }, 2000);
        }, 2000);
    });

    // Method to save the contents of the textarea buffer into a file on the SD card (AJAX style)
    async function saveFile() {
        const editFileInput = document.getElementById('editFile');
        const textarea       = document.getElementById('editFrameText');
        const statusDiv      = document.getElementById('saveStatus');
    
        if (!editFileInput || !textarea) {
            alert("Editor elements not found!");
            return;
        }
    
        let fullInput = editFileInput.value.trim();
        if (!fullInput) {
            alert("No file path/filename specified!");
            return;
        }
    
        // Clean path (same logic as before)
        let cleanedPath = fullInput
            .replace(/^\/(sdcard|sdpath)\/?/i, '')
            .replace(/^sd(card|path)\/?/i, '')
            .replace(/^[\\/]+/, '');
    
        if (!cleanedPath) {
            alert("No valid path after removing SD prefix!");
            return;
        }
    
        // Split → dir + filename
        let dirPart     = "";
        let filenameOnly = cleanedPath;
        const lastSlash = Math.max(cleanedPath.lastIndexOf('/'), cleanedPath.lastIndexOf('\\'));
    
        if (lastSlash >= 0) {
            dirPart     = cleanedPath.substring(0, lastSlash).replace(/^[\\/]+|[\\/]+$/g, '');
            filenameOnly = cleanedPath.substring(lastSlash + 1);
        }
    
        if (!filenameOnly) {
            alert("No valid filename found!");
            return;
        }
        if (filenameOnly.includes(' ')) {
            alert("Filename cannot contain spaces!");
            return;
        }
    
        // Prepare UI for saving
        const saveButton = document.getElementById('editSave');
        if (saveButton) saveButton.disabled = true;
        textarea.disabled = true;
        editFileInput.disabled = true;
    
        if (statusDiv) {
            statusDiv.style.backgroundColor = "#fff3cd";
            statusDiv.style.color = "#856404";
            statusDiv.innerHTML = "Saving... (creating backup if needed)";
        }
    
        // Attempt backup. Keep same name as server will rename to <filename>;<next unique number>
        let backupDone = false;
        let backupMsg  = "";
    
        try {
            const renameParams = new URLSearchParams();
            if (dirPart) renameParams.set("dir", dirPart);
            renameParams.set("oldname", filenameOnly);
            renameParams.set("name", filenameOnly);
    
            const renameUrl = `/data/rename?${renameParams.toString()}`;
            const renameRes = await fetch(renameUrl, { method: "GET" });
    
            backupDone = renameRes.ok;
            backupMsg  = backupDone ? "Backup created. " : "No backup created (may already exist). ";
        } catch (err) {
            console.warn("Backup rename failed:", err);
            backupMsg = "Backup attempt failed. ";
        }
    
        // Save the current content
        const content = textarea.value;
    
        let saveUrl = `/data/upload/${encodeURIComponent(filenameOnly)}`;
        if (dirPart) {
            saveUrl += `?dir=${encodeURIComponent(dirPart)}`;
        }
    
        try {
            const saveRes = await fetch(saveUrl, {
                method: "POST",
                headers: {
                    "Content-Type": "text/plain; charset=utf-8"
                },
                body: content
            });
    
            if (!saveRes.ok) {
                const errorText = await saveRes.text().catch(() => "(no details)");
                throw new Error(`Save failed (${saveRes.status}) – ${errorText}`);
            }
    
            // Success path
            if (statusDiv) {
                statusDiv.style.backgroundColor = "#d4edda";
                statusDiv.style.color = "#155724";
                statusDiv.innerHTML = `✓ Saved successfully. ${backupMsg}`;
            }
    
            // Optional: small delay then fade or clear status
            setTimeout(() => {
                if (statusDiv) statusDiv.style.opacity = "0.7";
            }, 2000);
    
        } catch (err) {
            console.error("Save error:", err);
            if (statusDiv) {
                statusDiv.style.backgroundColor = "#f8d7da";
                statusDiv.style.color = "#721c24";
                statusDiv.innerHTML = `✗ Save failed: ${err.message}`;
            }
            alert("Save failed!\n" + err.message);   // keep alert as fallback
    
        } finally {
            // Re-enable controls
            if (saveButton) saveButton.disabled = false;
            textarea.disabled = false;
            editFileInput.disabled = false;
        }
    }

    // Function to download file
    function downloadFile(content, filename, contentType) {
        var blob = new Blob([ content ], { type: contentType });
        var url =  window.URL.createObjectURL(blob);
        var a = document.createElement('a');
        a.href = url;
        a.download = filename;
        document.body.appendChild(a);
        a.click();
        document.body.removeChild(a);
    }

});