/**
 * InpaintRegionEditor Extension
 * 
 * 流程：图像 + 蒙版 <-> Photopea
 */

import { app } from "../../scripts/app.js";
import { api } from "../../scripts/api.js";

const PhotopeaBridge = {
    iframe: null,
    photopeaWindow: null,
    PHOTOPEA_ORIGIN: "https://www.photopea.com",

    init(iframe) {
        this.iframe = iframe;
        this.photopeaWindow = iframe.contentWindow;
    },

    async postMessage(message) {
        var self = this;
        return new Promise(function(resolve, reject) {
            if (!self.photopeaWindow) {
                reject(new Error("Photopea 未初始化"));
                return;
            }
            var responses = [];
            var timeoutId = null;
            var done = false;
            
            var handler = function(event) {
                if (event.origin !== self.PHOTOPEA_ORIGIN) return;
                responses.push(event.data);
                if (event.data === "done" && !done) {
                    done = true;
                    if (timeoutId) clearTimeout(timeoutId);
                    window.removeEventListener("message", handler);
                    resolve(responses);
                }
            };
            
            window.addEventListener("message", handler);
            self.photopeaWindow.postMessage(message, "*");
            
            timeoutId = setTimeout(function() {
                if (!done) {
                    done = true;
                    window.removeEventListener("message", handler);
                    reject(new Error("操作超时"));
                }
            }, 60000);
        });
    },

    async openImage(imageBlob) {
        var self = this;
        var reader = new FileReader();
        return new Promise(function(resolve, reject) {
            reader.onloadend = async function() {
                try {
                    await self.postMessage('app.open("' + reader.result + '", null, false);');
                    await self.postMessage('app.activeDocument.activeLayer.rasterize();');
                    resolve();
                } catch (e) {
                    reject(e);
                }
            };
            reader.onerror = reject;
            reader.readAsDataURL(imageBlob);
        });
    },

    async exportImage() {
        var result = await this.postMessage('app.activeDocument.saveToOE("png");');
        for (var i = 0; i < result.length; i++) {
            if (result[i] instanceof ArrayBuffer) {
                return new Blob([result[i]], { type: "image/png" });
            }
        }
        throw new Error("导出图像失败");
    },

    async exportLayerMask() {
        // 检查是否有图层蒙版
        var script = '(function(){var d=app.activeDocument;var l=d.activeLayer;if(!l.mask||!l.mask.enabled){app.echoToOE("NO_MASK");return;}var t=d.artLayers.add();d.activeChannels=[d.channels.getByName("Mask")];d.selection.selectAll();d.selection.copy();d.activeChannels=d.componentChannels;d.activeLayer=t;d.paste();l.visible=false;d.saveToOE("png");t.remove();l.visible=true;d.activeLayer=l;})();';
        
        var result = await this.postMessage(script);
        
        for (var i = 0; i < result.length; i++) {
            if (result[i] === "NO_MASK") return null;
        }
        
        for (var i = 0; i < result.length; i++) {
            if (result[i] instanceof ArrayBuffer) {
                return new Blob([result[i]], { type: "image/png" });
            }
        }
        return null;
    }
};

const PhotopeaModal = {
    modal: null,
    node: null,
    isOpen: false,

    show(node, imagePath) {
        this.node = node;
        this.imagePath = imagePath;
        this.isOpen = true;
        this.createUI();
    },

    createUI() {
        var self = this;
        this.modal && this.modal.remove();

        this.modal = document.createElement("div");
        this.modal.className = "photopea-modal";
        this.modal.innerHTML = 
            '<div class="photopea-container">' +
            '  <iframe id="pp-iframe" src="https://www.photopea.com/"></iframe>' +
            '  <div class="pp-toolbar">' +
            '    <div class="pp-left"><span class="pp-hint">编辑图像，用图层蒙版绘制重绘区域，然后保存</span></div>' +
            '    <div class="pp-right">' +
            '      <button id="pp-save" class="pp-btn pp-save">保存图像和蒙版</button>' +
            '      <button id="pp-cancel" class="pp-btn pp-cancel">取消</button>' +
            '    </div>' +
            '  </div>' +
            '  <div class="pp-status"><span id="pp-status-text">正在加载...</span></div>' +
            '</div>';

        this.injectStyles();
        document.body.appendChild(this.modal);

        var iframe = document.getElementById("pp-iframe");
        iframe.onload = async function() {
            if (!self.isOpen) return;
            PhotopeaBridge.init(iframe);
            self.setStatus("正在加载图像...");
            self.setupEvents();
            await self.loadImage();
        };
    },

    injectStyles() {
        if (document.getElementById("pp-styles")) return;
        var s = document.createElement("style");
        s.id = "pp-styles";
        s.textContent = ".photopea-modal{position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.9);z-index:99999;display:flex;align-items:center;justify-content:center}.photopea-container{width:95%;height:95%;display:flex;flex-direction:column;background:#1e1e1e;border-radius:8px;overflow:hidden}#pp-iframe{flex:1;width:100%;border:none}.pp-toolbar{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;background:#2d2d2d;border-top:1px solid #444;gap:10px}.pp-left{display:flex;align-items:center}.pp-right{display:flex;gap:10px}.pp-hint{color:#999;font-size:13px}.pp-btn{padding:10px 18px;border:none;border-radius:6px;cursor:pointer;font-size:14px;font-weight:500}.pp-btn:hover{transform:translateY(-1px)}.pp-save{background:#107c10;color:#fff}.pp-cancel{background:#555;color:#fff}.pp-status{padding:8px 16px;background:#1a1a1a;color:#888;font-size:12px}";
        document.head.appendChild(s);
    },

    setStatus(t) {
        if (!this.isOpen) return;
        var el = document.getElementById("pp-status-text");
        if (el) el.textContent = t;
    },

    setupEvents() {
        var self = this;
        document.getElementById("pp-save").onclick = async function() { await self.saveAll(); };
        document.getElementById("pp-cancel").onclick = function() { self.close(); };
        this.escHandler = function(e) { if (e.key === "Escape") self.close(); };
        document.addEventListener("keydown", this.escHandler);
    },

    async loadImage() {
        try {
            var path = this.imagePath || "";
            var filename = path, type = "input", subfolder = "";
            
            var m = path.match(/^(.+?)\s*\[(\w+)\]$/);
            if (m) { filename = m[1].trim(); type = m[2]; }
            var idx = filename.lastIndexOf("/");
            if (idx !== -1) { subfolder = filename.substring(0, idx); filename = filename.substring(idx + 1); }
            
            var url = "/view?filename=" + encodeURIComponent(filename) + "&type=" + type;
            if (subfolder) url += "&subfolder=" + encodeURIComponent(subfolder);
            
            var resp = await fetch(url);
            if (!resp.ok) { this.setStatus("加载失败"); return; }
            
            await PhotopeaBridge.openImage(await resp.blob());
            this.setStatus("图像已加载。使用 图层>图层蒙版 绘制蒙版，然后保存");
        } catch (e) {
            this.setStatus("加载失败: " + e.message);
        }
    },

    async saveAll() {
        if (!this.isOpen) return;
        
        try {
            this.setStatus("正在导出图像...");
            var imageBlob = await PhotopeaBridge.exportImage();
            
            this.setStatus("正在检查蒙版...");
            var maskBlob = null;
            try { maskBlob = await PhotopeaBridge.exportLayerMask(); } catch (e) {}
            
            this.setStatus("正在上传...");
            
            var imgResult = await this.upload(imageBlob, "edited.png");
            if (imgResult.name) {
                var w = this.node.widgets && this.node.widgets.find(function(x) { return x.name === "image"; });
                if (w) w.value = imgResult.name;
            }
            
            if (maskBlob) {
                var maskResult = await this.upload(maskBlob, "mask.png");
                if (maskResult.name) {
                    var mw = this.node.widgets && this.node.widgets.find(function(x) { return x.name === "mask_path"; });
                    if (mw) mw.value = maskResult.name;
                }
            }
            
            this.node.setDirtyCanvas(true);
            this.setStatus("已保存");
            
            // 自动关闭
            var self = this;
            setTimeout(function() { self.close(); }, 300);
            
        } catch (e) {
            this.setStatus("保存失败: " + e.message);
            alert("保存失败: " + e.message);
        }
    },

    async upload(blob, name) {
        var fd = new FormData();
        fd.append("image", blob, name);
        fd.append("type", "input");
        var resp = await api.fetchApi("/upload/image", { method: "POST", body: fd });
        return await resp.json();
    },

    close() {
        this.isOpen = false;
        if (this.escHandler) { document.removeEventListener("keydown", this.escHandler); this.escHandler = null; }
        if (this.modal) { this.modal.remove(); this.modal = null; }
        this.node = null;
    }
};

app.registerExtension({
    name: "comfyui.inpaint_region_editor",
    
    async beforeRegisterNodeDef(nodeType, nodeData, app) {
        if (nodeData.name !== "InpaintRegionEditor") return;
        
        var getExtraMenuOptions = nodeType.prototype.getExtraMenuOptions;
        nodeType.prototype.getExtraMenuOptions = function(canvas, options) {
            getExtraMenuOptions && getExtraMenuOptions.apply(this, arguments);
            var node = this;
            options.push(null);
            options.push({
                content: "Open in Photopea",
                callback: function() {
                    var w = node.widgets && node.widgets.find(function(x) { return x.name === "image"; });
                    if (w && w.value) {
                        PhotopeaModal.show(node, w.value);
                    } else {
                        alert("请先上传图像");
                    }
                }
            });
            return options;
        };
        
        var onNodeCreated = nodeType.prototype.onNodeCreated;
        nodeType.prototype.onNodeCreated = function() {
            var r = onNodeCreated ? onNodeCreated.apply(this, arguments) : undefined;
            this.addWidget("STRING", "mask_path", "", function() {}, { serialize: true });
            this.addWidget("STRING", "mask_bounds", "{}", function() {}, { serialize: true });
            return r;
        };
    }
});

console.log("[InpaintRegionEditor] Loaded");