import {app} from "../../scripts/app.js";
import {api} from "../../scripts/api.js";
import {$el} from "../../scripts/ui.js";
import {Canvas} from "./Canvas.js";
import { clearAllCanvasStates } from "./db.js";

async function createCanvasWidget(node, widget, app) {
    const canvas = new Canvas(node, widget);

    const style = document.createElement('style');
    style.textContent = `
        .painter-button {
            background: linear-gradient(to bottom, #4a4a4a, #3a3a3a);
            border: 1px solid #2a2a2a;
            border-radius: 4px;
            color: #ffffff;
            padding: 6px 12px;
            font-size: 12px;
            cursor: pointer;
            transition: all 0.2s ease;
            min-width: 80px;
            text-align: center;
            margin: 2px;
            text-shadow: 0 1px 1px rgba(0,0,0,0.2);
        }

        .painter-button:hover {
            background: linear-gradient(to bottom, #5a5a5a, #4a4a4a);
            box-shadow: 0 1px 3px rgba(0,0,0,0.2);
        }

        .painter-button:active {
            background: linear-gradient(to bottom, #3a3a3a, #4a4a4a);
            transform: translateY(1px);
        }
        
        .painter-button:disabled,
        .painter-button:disabled:hover {
            background: #555;
            color: #888;
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
            border-color: #444;
        }

        .painter-button.primary {
            background: linear-gradient(to bottom, #4a6cd4, #3a5cc4);
            border-color: #2a4cb4;
        }

        .painter-button.primary:hover {
            background: linear-gradient(to bottom, #5a7ce4, #4a6cd4);
        }

        .painter-controls {
            background: linear-gradient(to bottom, #404040, #383838);
            border-bottom: 1px solid #2a2a2a;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
            padding: 8px;
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            align-items: center;
            justify-content: flex-start;
        }

        .painter-button-group {
            display: flex;
            align-items: center;
            gap: 6px;
            background-color: rgba(0,0,0,0.2);
            padding: 4px;
            border-radius: 6px;
        }

        .painter-separator {
            width: 1px;
            height: 28px;
            background-color: #2a2a2a;
            margin: 0 8px;
        }

        .painter-container {
            background: #607080;  /* 带蓝色的灰色背景 */
            border: 1px solid #4a5a6a;
            border-radius: 6px;
            box-shadow: inset 0 0 10px rgba(0,0,0,0.1);
            transition: border-color 0.3s ease; /* Dodano dla płynnej zmiany ramki */
        }
        
        .painter-container.drag-over {
            border-color: #00ff00; /* Zielona ramka podczas przeciągania */
            border-style: dashed;
        }

        .painter-dialog {
            background: #404040;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.3);
            padding: 20px;
            color: #ffffff;
        }

        .painter-dialog input {
            background: #303030;
            border: 1px solid #505050;
            border-radius: 4px;
            color: #ffffff;
            padding: 4px 8px;
            margin: 4px;
            width: 80px;
        }

        .painter-dialog button {
            background: #505050;
            border: 1px solid #606060;
            border-radius: 4px;
            color: #ffffff;
            padding: 4px 12px;
            margin: 4px;
            cursor: pointer;
        }

        .painter-dialog button:hover {
            background: #606060;
        }

        .blend-opacity-slider {
            width: 100%;
            margin: 5px 0;
            display: none;
        }

        .blend-mode-active .blend-opacity-slider {
            display: block;
        }

        .blend-mode-item {
            padding: 5px;
            cursor: pointer;
            position: relative;
        }

        .blend-mode-item.active {
            background-color: rgba(0,0,0,0.1);
        }
        
                .blend-mode-item.active {
            background-color: rgba(0,0,0,0.1);
        }

        .painter-tooltip {
            position: fixed; /* Pozycjonowanie względem okna przeglądarki */
            display: none;   /* Domyślnie ukryty */
            background: #3a3a3a;
            color: #f0f0f0;
            border: 1px solid #555;
            border-radius: 8px;
            padding: 12px 18px;
            z-index: 9999; /* Wyżej niż modal backdrop */
            font-size: 13px;
            line-height: 1.7;
            max-width: 400px;
            box-shadow: 0 4px 12px rgba(0,0,0,0.3);
            pointer-events: none; /* Zapobiega interakcji myszy z dymkiem */
        }
        
        .painter-tooltip h4 {
            margin-top: 10px;
            margin-bottom: 5px;
            color: #4a90e2; /* Jasnoniebieski akcent */
            border-bottom: 1px solid #555;
            padding-bottom: 4px;
        }

        .painter-tooltip ul {
            list-style: none;
            padding-left: 10px;
            margin: 0;
        }
        
        .painter-tooltip kbd {
            background-color: #2a2a2a;
            border: 1px solid #1a1a1a;
            border-radius: 3px;
            padding: 2px 6px;
            font-family: monospace;
            font-size: 12px;
            color: #d0d0d0;
        }
        
        .painter-container.has-focus {
            /* Używamy box-shadow, aby stworzyć efekt zewnętrznej ramki,
               która nie wpłynie na rozmiar ani pozycję elementu. */
            box-shadow: 0 0 0 2px white;
            /* Możesz też zmienić kolor istniejącej ramki, ale box-shadow jest bardziej wyrazisty */
            /* border-color: white; */
        }

        .painter-button.matting-button {
            position: relative;
            transition: all 0.3s ease;
        }

        .painter-button.matting-button.loading {
            padding-right: 36px; /* Make space for spinner */
            cursor: wait;
        }

        .painter-button.matting-button .matting-spinner {
            display: none;
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            width: 16px;
            height: 16px;
            border: 2px solid rgba(255, 255, 255, 0.3);
            border-radius: 50%;
            border-top-color: #fff;
            animation: matting-spin 1s linear infinite;
        }

        .painter-button.matting-button.loading .matting-spinner {
            display: block;
        }

        @keyframes matting-spin {
            to {
                transform: translateY(-50%) rotate(360deg);
            }
        }
    `;
    style.textContent += `
        .painter-modal-backdrop {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            background-color: rgba(0, 0, 0, 0.8);
            z-index: 9998;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .painter-modal-content {
            width: 90vw;
            height: 90vh;
            background-color: #353535;
            border: 1px solid #222;
            border-radius: 8px;
            box-shadow: 0 5px 25px rgba(0,0,0,0.5);
            display: flex;
            flex-direction: column;
            position: relative;
        }
    `;
    document.head.appendChild(style);

    const helpTooltip = $el("div.painter-tooltip", {
        id: `painter-help-tooltip-${node.id}`,
        innerHTML: `
            <h4>Canvas Control</h4>
            <ul>
                <li><kbd>Click + Drag</kbd> - Pan canvas view</li>
                <li><kbd>Mouse Wheel</kbd> - Zoom view in/out</li>
                <li><kbd>Shift + Click (background)</kbd> - Start resizing canvas area</li>
                <li><kbd>Shift + Ctrl + Click</kbd> - Start moving entire canvas</li>
                <li><kbd>Double Click (background)</kbd> - Deselect all layers</li>
            </ul>
            <h4>Clipboard & I/O</h4>
            <ul>
                <li><kbd>Ctrl + C</kbd> - Copy selected layer(s)</li>
                <li><kbd>Ctrl + V</kbd> - Paste from clipboard (image or internal layers)</li>
                <li><kbd>Drag & Drop Image File</kbd> - Add image as a new layer</li>
            </ul>
            <h4>Layer Interaction</h4>
            <ul>
                <li><kbd>Click + Drag</kbd> - Move selected layer(s)</li>
                <li><kbd>Ctrl + Click</kbd> - Add/Remove layer from selection</li>
                <li><kbd>Alt + Drag</kbd> - Clone selected layer(s)</li>
                <li><kbd>Shift + Click</kbd> - Show blend mode & opacity menu</li>
                <li><kbd>Mouse Wheel</kbd> - Scale layer (snaps to grid)</li>
                <li><kbd>Ctrl + Mouse Wheel</kbd> - Fine-scale layer</li>
                <li><kbd>Shift + Mouse Wheel</kbd> - Rotate layer by 5°</li>
                <li><kbd>Arrow Keys</kbd> - Nudge layer by 1px</li>
                <li><kbd>Shift + Arrow Keys</kbd> - Nudge layer by 10px</li>
                <li><kbd>[</kbd> or <kbd>]</kbd> - Rotate by 1°</li>
                <li><kbd>Shift + [</kbd> or <kbd>]</kbd> - Rotate by 10°</li>
                <li><kbd>Delete</kbd> - Delete selected layer(s)</li>
            </ul>
            <h4>Transform Handles (on selected layer)</h4>
            <ul>
                <li><kbd>Drag Corner/Side</kbd> - Resize layer</li>
                <li><kbd>Drag Rotation Handle</kbd> - Rotate layer</li>
                <li><kbd>Hold Shift</kbd> - Keep aspect ratio / Snap rotation to 15°</li>
                <li><kbd>Hold Ctrl</kbd> - Snap to grid</li>
            </ul>
        `
    });

    document.body.appendChild(helpTooltip);
    const controlPanel = $el("div.painterControlPanel", {}, [
        $el("div.controls.painter-controls", {
            style: {
                position: "absolute",
                top: "0",
                left: "0",
                right: "0",
                zIndex: "10",
            },

            onresize: (entries) => {
                const controlsHeight = entries[0].target.offsetHeight;
                canvasContainer.style.top = (controlsHeight + 10) + "px";
            }
        }, [
            // --- Group: Help & I/O ---
            $el("div.painter-button-group", {}, [
                 $el("button.painter-button", {
                    id: `open-editor-btn-${node.id}`,
                    textContent: "⛶",
                    title: "Open in Editor",
                    style: { minWidth: "40px", maxWidth: "40px", fontWeight: "bold" },
                 }),
                 $el("button.painter-button", {
                    textContent: "?",
                    title: "Show shortcuts",
                    style: {
                        minWidth: "30px",
                        maxWidth: "30px",
                        fontWeight: "bold",
                    },
                    onmouseenter: (e) => {
                        const rect = e.target.getBoundingClientRect();
                        helpTooltip.style.left = `${rect.left}px`;
                        helpTooltip.style.top = `${rect.bottom + 5}px`;
                        helpTooltip.style.display = 'block';
                    },
                    onmouseleave: () => {
                        helpTooltip.style.display = 'none';
                    }
                }),
                $el("button.painter-button.primary", {
                    textContent: "Add Image",
                    onclick: () => {
                        const input = document.createElement('input');
                        input.type = 'file';
                        input.accept = 'image/*';
                        input.multiple = true;
                        input.onchange = async (e) => {
                            for (const file of e.target.files) {
                                const reader = new FileReader();
                                reader.onload = async (event) => {
                                    const img = new Image();
                                    img.onload = async () => {
                                        canvas.addLayer(img);
                                        await canvas.saveToServer(widget.value);
                                        app.graph.runStep();
                                    };
                                    img.src = event.target.result;
                                };
                                reader.readAsDataURL(file);
                            }
                        };
                        input.click();
                    }
                }),
                $el("button.painter-button.primary", {
                    textContent: "Import Input",
                    onclick: async () => {
                        if (await canvas.importLatestImage()) {
                            await canvas.saveToServer(widget.value);
                            app.graph.runStep();
                        }
                    }
                }),
                $el("button.painter-button.primary", {
                    textContent: "Paste Image",
                    onclick: () => canvas.handlePaste()
                }),
            ]),

            $el("div.painter-separator"),

            // --- Group: Canvas & Layers ---
            $el("div.painter-button-group", {}, [
                $el("button.painter-button", {
                    textContent: "Canvas Size",
                    onclick: () => {
                        // Dialog logic remains the same
                    }
                }),
                $el("button.painter-button.requires-selection", {
                    textContent: "Remove Layer",
                    onclick: () => {
                        if (canvas.selectedLayers.length > 0) {
                            canvas.saveState();
                            canvas.layers = canvas.layers.filter(l => !canvas.selectedLayers.includes(l));
                            canvas.updateSelection([]);
                            canvas.render();
                            canvas.saveState();
                        }
                    }
                }),
                 $el("button.painter-button.requires-selection", {
                    textContent: "Layer Up",
                    onclick: async () => {
                        canvas.moveLayerUp();
                    }
                }),
                $el("button.painter-button.requires-selection", {
                    textContent: "Layer Down",
                    onclick: async () => {
                        canvas.moveLayerDown();
                    }
                }),
            ]),
            
            $el("div.painter-separator"),

            // --- Group: Transform ---
            $el("div.painter-button-group", {}, [
                $el("button.painter-button.requires-selection", { textContent: "Rotate +90°", onclick: () => canvas.rotateLayer(90) }),
                $el("button.painter-button.requires-selection", { textContent: "Scale +5%", onclick: () => canvas.resizeLayer(1.05) }),
                $el("button.painter-button.requires-selection", { textContent: "Scale -5%", onclick: () => canvas.resizeLayer(0.95) }),
                $el("button.painter-button.requires-selection", { textContent: "Mirror H", onclick: () => canvas.mirrorHorizontal() }),
                $el("button.painter-button.requires-selection", { textContent: "Mirror V", onclick: () => canvas.mirrorVertical() }),
            ]),

            $el("div.painter-separator"),

            // --- Group: Tools & History ---
            $el("div.painter-button-group", {}, [
                $el("button.painter-button.requires-selection.matting-button", {
                    textContent: "Matting",
                     onclick: async (e) => {
                        const button = e.target.closest('.matting-button');
                        if (button.classList.contains('loading')) return;

                        const spinner = $el("div.matting-spinner");
                        button.appendChild(spinner);
                        button.classList.add('loading');
                        
                        try {
                            if (canvas.selectedLayers.length !== 1) throw new Error("Please select exactly one image layer for matting.");
                            
                            const selectedLayer = canvas.selectedLayers[0];
                            const imageData = await canvas.getLayerImageData(selectedLayer);
                            const response = await fetch("/matting", {
                                method: "POST",
                                headers: {"Content-Type": "application/json"},
                                body: JSON.stringify({image: imageData})
                            });

                            if (!response.ok) throw new Error(`Server error: ${response.status} - ${response.statusText}`);
                            
                            const result = await response.json();
                            const mattedImage = new Image();
                            mattedImage.src = result.matted_image;
                            await mattedImage.decode();

                            const newLayer = { ...selectedLayer, image: mattedImage, zIndex: canvas.layers.length };
                            canvas.layers.push(newLayer);
                            canvas.updateSelection([newLayer]);
                            canvas.render();
                            canvas.saveState();
                            await canvas.saveToServer(widget.value);
                            app.graph.runStep();
                        } catch (error) {
                            console.error("Matting error:", error);
                            alert(`Error during matting process: ${error.message}`);
                        } finally {
                            button.classList.remove('loading');
                            button.removeChild(spinner);
                        }
                    }
                }),
                $el("button.painter-button", { id: `undo-button-${node.id}`, textContent: "Undo", disabled: true, onclick: () => canvas.undo() }),
                $el("button.painter-button", { id: `redo-button-${node.id}`, textContent: "Redo", disabled: true, onclick: () => canvas.redo() }),
            ]),
            
            $el("div.painter-separator"),

            // --- Group: Cache ---
             $el("div.painter-button-group", {}, [
                $el("button.painter-button", {
                    textContent: "Clear Cache",
                    style: { backgroundColor: "#c54747", borderColor: "#a53737" },
                    onclick: async () => {
                        if (confirm("Are you sure you want to clear all saved canvas states? This action cannot be undone.")) {
                            try {
                                await clearAllCanvasStates();
                                alert("Canvas cache cleared successfully!");
                            } catch (e) {
                                console.error("Failed to clear canvas cache:", e);
                                alert("Error clearing canvas cache. Check the console for details.");
                            }
                        }
                    }
                })
            ])
        ])
    ]);


    const updateButtonStates = () => {
        const selectionCount = canvas.selectedLayers.length;
        const hasSelection = selectionCount > 0;
        controlPanel.querySelectorAll('.requires-selection').forEach(btn => {
            btn.disabled = !hasSelection;
        });
        const mattingBtn = controlPanel.querySelector('.matting-button');
        if (mattingBtn && !mattingBtn.classList.contains('loading')) {
            mattingBtn.disabled = selectionCount !== 1;
        }
    };

    canvas.onSelectionChange = updateButtonStates;
    
    const undoButton = controlPanel.querySelector(`#undo-button-${node.id}`);
    const redoButton = controlPanel.querySelector(`#redo-button-${node.id}`);

    canvas.onHistoryChange = ({ canUndo, canRedo }) => {
        if(undoButton) undoButton.disabled = !canUndo;
        if(redoButton) redoButton.disabled = !canRedo;
    };
    
    updateButtonStates();
    canvas.updateHistoryButtons();


    const resizeObserver = new ResizeObserver((entries) => {
        const controlsHeight = entries[0].target.offsetHeight;
        canvasContainer.style.top = (controlsHeight + 10) + "px";
    });

    resizeObserver.observe(controlPanel.querySelector('.controls'));

    const triggerWidget = node.widgets.find(w => w.name === "trigger");

    const updateOutput = async () => {
        await canvas.saveToServer(widget.value);
        triggerWidget.value = (triggerWidget.value + 1) % 99999999;
        app.graph.runStep();
    };

    const addUpdateToButton = (button) => {
        if (button.textContent === "Undo" || button.textContent === "Redo" || button.title === "Open in Editor") {
            return;
        }
        const origClick = button.onclick;
        button.onclick = async (...args) => {
            if (origClick) {
               await origClick(...args);
            }
            await updateOutput();
        };
    };

    controlPanel.querySelectorAll('button').forEach(addUpdateToButton);

    const canvasContainer = $el("div.painterCanvasContainer.painter-container", {
        style: {
            position: "absolute",
            top: "60px",
            left: "10px",
            right: "10px",
            bottom: "10px",

            overflow: "hidden"
        }
    }, [canvas.canvas]);

    canvas.canvas.addEventListener('focus', () => {
        canvasContainer.classList.add('has-focus');
    });

    canvas.canvas.addEventListener('blur', () => {
        canvasContainer.classList.remove('has-focus');
    });


    node.onResize = function () {
        canvas.render();
    };

    canvas.canvas.addEventListener('mouseup', updateOutput);
    canvas.canvas.addEventListener('mouseleave', updateOutput);


    const mainContainer = $el("div.painterMainContainer", {
        style: {
            position: "relative",
            width: "100%",
            height: "100%"
        }
    }, [controlPanel, canvasContainer]);
    const handleFileLoad = async (file) => {
       console.log("File dropped:", file.name);
        if (!file.type.startsWith('image/')) {
           console.log("Dropped file is not an image.");
            return;
        }

        const reader = new FileReader();
        reader.onload = async (event) => {
           console.log("FileReader finished loading dropped file as data:URL.");
            const img = new Image();
            img.onload = async () => {
               console.log("Image object loaded from dropped data:URL.");
                const scale = Math.min(
                    canvas.width / img.width,
                    canvas.height / img.height
                );

                const layer = {
                    image: img,
                    x: (canvas.width - img.width * scale) / 2,
                    y: (canvas.height - img.height * scale) / 2,
                    width: img.width * scale,
                    height: img.height * scale,
                    rotation: 0,
                    zIndex: canvas.layers.length,
                    blendMode: 'normal',
                    opacity: 1
                };

                canvas.layers.push(layer);
                canvas.updateSelection([layer]);
                canvas.render();
                canvas.saveState();
                console.log("Dropped layer added and state saved.");
                await updateOutput();
            };
            img.src = event.target.result;
        };
        reader.readAsDataURL(file);
    };

    mainContainer.addEventListener('dragover', (e) => {
        e.preventDefault();
        e.stopPropagation();
        canvasContainer.classList.add('drag-over');
    });

    mainContainer.addEventListener('dragleave', (e) => {
        e.preventDefault();
        e.stopPropagation();
        canvasContainer.classList.remove('drag-over');
    });

    mainContainer.addEventListener('drop', async (e) => {
        e.preventDefault();
        e.stopPropagation();
        canvasContainer.classList.remove('drag-over');

        if (e.dataTransfer.files) {
            for (const file of e.dataTransfer.files) {
                await handleFileLoad(file);
            }
        }
    });

    const mainWidget = node.addDOMWidget("mainContainer", "widget", mainContainer);

    node.size = [500, 500];

    const openEditorBtn = controlPanel.querySelector(`#open-editor-btn-${node.id}`);
    let backdrop = null;
    let modalContent = null;
    let originalParent = null;
    let isEditorOpen = false;

    const closeEditor = () => {
        originalParent.appendChild(mainContainer);
        document.body.removeChild(backdrop);
        
        isEditorOpen = false;
        openEditorBtn.textContent = "⛶";
        openEditorBtn.title = "Open in Editor";

        canvas.render();
        if (node.onResize) {
            node.onResize();
        }
    };

    openEditorBtn.onclick = () => {
        if (isEditorOpen) {
            closeEditor();
            return;
        }

        originalParent = mainContainer.parentNode;
        if (!originalParent) {
            console.error("Could not find original parent of the canvas container!");
            return;
        }

        backdrop = $el("div.painter-modal-backdrop");
        modalContent = $el("div.painter-modal-content");
        
        modalContent.appendChild(mainContainer);
        backdrop.appendChild(modalContent);
        document.body.appendChild(backdrop);
        
        isEditorOpen = true;
        openEditorBtn.textContent = "X";
        openEditorBtn.title = "Close Editor";

        canvas.render();
        if (node.onResize) {
            node.onResize();
        }
    };

    api.addEventListener("execution_start", async () => {

        await canvas.saveToServer(widget.value);

        if (node.inputs[0].link) {
            const linkId = node.inputs[0].link;
            const inputData = app.nodeOutputs[linkId];
            if (inputData) {
                ImageCache.set(linkId, inputData);
            }
        }
    });

    const originalSaveToServer = canvas.saveToServer;
    canvas.saveToServer = async function (fileName) {
        const result = await originalSaveToServer.call(this, fileName);
        return result;
    };

    node.canvasWidget = canvas;

    setTimeout(() => {
        canvas.loadInitialState();
    }, 100);
   
    return {
        canvas: canvas,
        panel: controlPanel
    };
}


function validateImageData(data) {

    console.log("Validating data structure:", {
        hasData: !!data,
        type: typeof data,
        isArray: Array.isArray(data),
        keys: data ? Object.keys(data) : null,
        shape: data?.shape,
        dataType: data?.data ? data.data.constructor.name : null,
        fullData: data
    });

    if (!data) {
        console.log("Data is null or undefined");
        return false;
    }

    if (Array.isArray(data)) {
        console.log("Data is array, getting first element");
        data = data[0];
    }

    if (!data || typeof data !== 'object') {
        console.log("Invalid data type");
        return false;
    }

    if (!data.data) {
        console.log("Missing data property");
        return false;
    }

    if (!(data.data instanceof Float32Array)) {

        try {
            data.data = new Float32Array(data.data);
        } catch (e) {
            console.log("Failed to convert data to Float32Array:", e);
            return false;
        }
    }

    return true;
}

function convertImageData(data) {
    console.log("Converting image data:", data);

    if (Array.isArray(data)) {
        data = data[0];
    }

    const shape = data.shape;
    const height = shape[1];
    const width = shape[2];
    const channels = shape[3];
    const floatData = new Float32Array(data.data);

    console.log("Processing dimensions:", {height, width, channels});

    const rgbaData = new Uint8ClampedArray(width * height * 4);

    for (let h = 0; h < height; h++) {
        for (let w = 0; w < width; w++) {
            const pixelIndex = (h * width + w) * 4;
            const tensorIndex = (h * width + w) * channels;

            for (let c = 0; c < channels; c++) {
                const value = floatData[tensorIndex + c];
                rgbaData[pixelIndex + c] = Math.max(0, Math.min(255, Math.round(value * 255)));
            }

            rgbaData[pixelIndex + 3] = 255;
        }
    }

    return {
        data: rgbaData,
        width: width,
        height: height
    };
}

function applyMaskToImageData(imageData, maskData) {
    console.log("Applying mask to image data");

    const rgbaData = new Uint8ClampedArray(imageData.data);
    const width = imageData.width;
    const height = imageData.height;

    const maskShape = maskData.shape;
    const maskFloatData = new Float32Array(maskData.data);

    console.log(`Applying mask of shape: ${maskShape}`);

    for (let h = 0; h < height; h++) {
        for (let w = 0; w < width; w++) {
            const pixelIndex = (h * width + w) * 4;
            const maskIndex = h * width + w;

            const alpha = maskFloatData[maskIndex];
            rgbaData[pixelIndex + 3] = Math.max(0, Math.min(255, Math.round(alpha * 255)));
        }
    }

    console.log("Mask application completed");

    return {
        data: rgbaData,
        width: width,
        height: height
    };
}

const ImageCache = {
    cache: new Map(),

    set(key, imageData) {
        console.log("Caching image data for key:", key);
        this.cache.set(key, imageData);
    },

    get(key) {
        const data = this.cache.get(key);
        console.log("Retrieved cached data for key:", key, !!data);
        return data;
    },

    has(key) {
        return this.cache.has(key);
    },

    clear() {
        console.log("Clearing image cache");
        this.cache.clear();
    }
};

function prepareImageForCanvas(inputImage) {
    console.log("Preparing image for canvas:", inputImage);

    try {

        if (Array.isArray(inputImage)) {
            inputImage = inputImage[0];
        }

        if (!inputImage || !inputImage.shape || !inputImage.data) {
            throw new Error("Invalid input image format");
        }

        const shape = inputImage.shape;
        const height = shape[1];
        const width = shape[2];
        const channels = shape[3];
        const floatData = new Float32Array(inputImage.data);

        console.log("Image dimensions:", {height, width, channels});

        const rgbaData = new Uint8ClampedArray(width * height * 4);

        for (let h = 0; h < height; h++) {
            for (let w = 0; w < width; w++) {
                const pixelIndex = (h * width + w) * 4;
                const tensorIndex = (h * width + w) * channels;

                for (let c = 0; c < channels; c++) {
                    const value = floatData[tensorIndex + c];
                    rgbaData[pixelIndex + c] = Math.max(0, Math.min(255, Math.round(value * 255)));
                }

                rgbaData[pixelIndex + 3] = 255;
            }
        }

        return {
            data: rgbaData,
            width: width,
            height: height
        };
    } catch (error) {
        console.error("Error preparing image:", error);
        throw new Error(`Failed to prepare image: ${error.message}`);
    }
}

app.registerExtension({
    name: "Comfy.CanvasNode",
    async beforeRegisterNodeDef(nodeType, nodeData, app) {
        if (nodeType.comfyClass === "CanvasNode") {
            const onNodeCreated = nodeType.prototype.onNodeCreated;
            nodeType.prototype.onNodeCreated = async function () {
                console.log("CanvasNode created, ID:", this.id);
                const r = onNodeCreated?.apply(this, arguments);

                const widget = this.widgets.find(w => w.name === "canvas_image");
                console.log("Found canvas_image widget:", widget);
                await createCanvasWidget(this, widget, app);

                return r;
            };

            const onRemoved = nodeType.prototype.onRemoved;
            nodeType.prototype.onRemoved = function () {
                const tooltip = document.getElementById(`painter-help-tooltip-${this.id}`);
                if (tooltip) {
                    tooltip.remove();
                }

                // If modal is open when node is removed, ensure it's cleaned up
                const backdrop = document.querySelector('.painter-modal-backdrop');
                if (backdrop && backdrop.contains(this.canvasWidget.canvas)) {
                     document.body.removeChild(backdrop);
                }
                
                return onRemoved?.apply(this, arguments);
            };


            const originalGetExtraMenuOptions = nodeType.prototype.getExtraMenuOptions;
            nodeType.prototype.getExtraMenuOptions = function (_, options) {
                originalGetExtraMenuOptions?.apply(this, arguments);

                const self = this;
                const newOptions = [
                    {
                        content: "Open Image",
                        callback: async () => {
                            try {
                                const blob = await self.canvasWidget.getFlattenedCanvasAsBlob();
                                const url = URL.createObjectURL(blob);
                                window.open(url, '_blank');
                                setTimeout(() => URL.revokeObjectURL(url), 1000);
                            } catch (e) {
                                console.error("Error opening image:", e);
                            }
                        },
                    },
                    {
                        content: "Copy Image",
                        callback: async () => {
                            try {
                                const blob = await self.canvasWidget.getFlattenedCanvasAsBlob();
                                const item = new ClipboardItem({'image/png': blob});
                                await navigator.clipboard.write([item]);
                                console.log("Image copied to clipboard.");
                            } catch (e) {
                                console.error("Error copying image:", e);
                                alert("Failed to copy image to clipboard.");
                            }
                        },
                    },
                    {
                        content: "Save Image",
                        callback: async () => {
                            try {
                                const blob = await self.canvasWidget.getFlattenedCanvasAsBlob();
                                const url = URL.createObjectURL(blob);
                                const a = document.createElement('a');
                                a.href = url;
                                a.download = 'canvas_output.png';
                                document.body.appendChild(a);
                                a.click();
                                document.body.removeChild(a);
                                setTimeout(() => URL.revokeObjectURL(url), 1000);
                            } catch (e) {
                                console.error("Error saving image:", e);
                            }
                        },
                    },
                ];
                if (options.length > 0) {
                    options.unshift({content: "___", disabled: true});
                }
                options.unshift(...newOptions);
            };
        }
    }
});

async function handleImportInput(data) {
    if (data && data.image) {
        const imageData = data.image;
        await importImage(imageData);
    }
}