import { Plugin, ButtonView } from 'ckeditor5';

import ckeditor5Icon from '../theme/icons/ckeditor.svg';
import ckeditor5Iconn from '../theme/icons/ckeditorr.svg';

// import { asBlob } from 'html-docx-js-typescript';
// import { saveAs } from 'file-saver';

// import Temml from 'temml';
import { MathMLToLaTeX } from 'mathml-to-latex';

export default class Import extends Plugin {
	public static get pluginName() {
		return 'Import' as const;
	}

	public init(): void {
		const editor = this.editor;
		const t = editor.t;
		const model = editor.model;

		// Add the "importButton" to feature components.
		editor.ui.componentFactory.add( 'importDocx', locale => {
			const view = new ButtonView( locale );

			view.set( {
				label: t( 'Import Docx' ),
				icon: ckeditor5Iconn,
				tooltip: true
			} );

			// POST fetch html from docx
			this.listenTo( view, 'execute', async () => {
				// curl -X 'POST' \
				// 'http://localhost:8080/aspose/word-to-html' \
				// -H 'accept: text/plain' \
				// -H 'Content-Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document' \
				// --data-binary '@stou(207).docx'

				// file accpt docx
				const input = document.createElement('input');
				input.type = 'file';
				input.accept = '.docx';
				input.click();

				input.addEventListener('change', async () => {
					const file = input.files![0];
					const formData = new FormData();
					formData.append("file", file);

					try {
						const response = await fetch("http://localhost:8080/aspose/word-to-html", {
							method: "POST",
							headers: {
								// Do not set `Content-Type` manually when using FormData;
								// the browser will automatically set the correct boundary for multipart/form-data.
							},
							body: file, // directly sending file bytes as the backend expects byte[]
						});

						if (!response.ok) {
							throw new Error(`Failed to upload file: ${response.statusText}`);
						}

						const htmlText = await response.text();
						// console.log("Converted HTML:", htmlText);
						const htmlDoc = new DOMParser().parseFromString(htmlText, "text/html");
						const body = htmlDoc.body;
						// pre-process mathml to latex
						// get all mathml elements
						// replace all mathml element in the body with script type math/tex with inside content latex
						const mathmlElements = body.querySelectorAll("math");
						mathmlElements.forEach(mathmlElement => {
							const latex = MathMLToLaTeX.convert(mathmlElement.outerHTML);
							const scriptElement = document.createElement("script");
							scriptElement.type = "math/tex";
							scriptElement.textContent = latex;
							const spanElement = document.createElement("span");
							spanElement.appendChild(scriptElement);
							mathmlElement.replaceWith(spanElement);
						});
						// font-family for <span> concat with , serif
						const spans = body.querySelectorAll("span");
						spans.forEach(span => {
							// span.style.fontFamily += ", serif";
							// check if it's <p> tag has font-size attribute, then apply to <span> tag
							const p = span.parentElement;
							if (p && p.tagName === "P") {
								const fontSize = p.style.fontSize;
								if (fontSize && span.style.fontSize === "") {
									span.setAttribute("style", `${span.getAttribute("style")}; font-size: ${fontSize}`);
								}
							}
							const li = span.parentElement;
							if (li && li.tagName === "LI") {
								const outerli = li.parentElement?.parentElement;
								if (outerli && outerli.tagName === "LI") {
									const fontSize = outerli.style.fontSize;
									if (fontSize && li.style.fontSize === "") {
										li.setAttribute("style", `${span.getAttribute("style")}; font-size: ${fontSize}`);
									}
								}
								const fontSize = li.style.fontSize;
								if (fontSize && span.style.fontSize === "") {
									span.setAttribute("style", `${span.getAttribute("style")}; font-size: ${fontSize}`);
								}
							}
							const pp = span.parentElement?.parentElement;
							if (pp && span.parentElement.tagName === "A") {
								const fontSize = pp.style.fontSize;
								if (fontSize && span.style.fontSize === "") {
									span.setAttribute("style", `${span.getAttribute("style")}; font-size: ${fontSize}`);
								}
							}
						});
						console.log("Converted HTML:", body.innerHTML);
						this.editor.setData(body.innerHTML);
					} catch (error) {
						console.error("Error uploading file:", error);
						throw error;
					}

					editor.editing.view.focus();
				});
			} );

			return view;
		} );

		// Add the "insertButton" to feature components.
		editor.ui.componentFactory.add( 'insertDocx', locale => {
			const view = new ButtonView( locale );

			view.set( {
				label: t( 'Insert Docx' ),
				icon: ckeditor5Icon,
				tooltip: true
			} );

			// POST fetch html from docx
			this.listenTo( view, 'execute', async () => {
				// curl -X 'POST' \
				// 'http://localhost:8080/aspose/word-to-html' \
				// -H 'accept: text/plain' \
				// -H 'Content-Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document' \
				// --data-binary '@stou(207).docx'

				// file accpt docx
				const input = document.createElement('input');
				input.type = 'file';
				input.accept = '.docx';
				input.click();

				input.addEventListener('change', async () => {
					const file = input.files![0];
					const formData = new FormData();
					formData.append("file", file);

					try {
						const response = await fetch("http://localhost:8080/aspose/word-to-html", {
							method: "POST",
							headers: {
								// Do not set `Content-Type` manually when using FormData;
								// the browser will automatically set the correct boundary for multipart/form-data.
							},
							body: file, // directly sending file bytes as the backend expects byte[]
						});

						if (!response.ok) {
							throw new Error(`Failed to upload file: ${response.statusText}`);
						}

						const htmlText = await response.text();
						// console.log("Converted HTML:", htmlText);
						const htmlDoc = new DOMParser().parseFromString(htmlText, "text/html");
						const body = htmlDoc.body;
						// pre-process mathml to latex
						// get all mathml elements
						// replace all mathml element in the body with script type math/tex with inside content latex
						const mathmlElements = body.querySelectorAll("math");
						mathmlElements.forEach(mathmlElement => {
							const latex = MathMLToLaTeX.convert(mathmlElement.outerHTML);
							const scriptElement = document.createElement("script");
							scriptElement.type = "math/tex";
							scriptElement.textContent = latex;
							const spanElement = document.createElement("span");
							spanElement.appendChild(scriptElement);
							mathmlElement.replaceWith(spanElement);
						});
						// font-family for <span> concat with , serif
						const spans = body.querySelectorAll("span");
						spans.forEach(span => {
							// span.style.fontFamily += ", serif";
							// check if it's <p> tag has font-size attribute, then apply to <span> tag
							const p = span.parentElement;
							if (p && p.tagName === "P") {
								const fontSize = p.style.fontSize;
								if (fontSize && span.style.fontSize === "") {
									span.setAttribute("style", `${span.getAttribute("style")}; font-size: ${fontSize}`);
								}
							}
							const li = span.parentElement;
							if (li && li.tagName === "LI") {
								const outerli = li.parentElement?.parentElement;
								if (outerli && outerli.tagName === "LI") {
									const fontSize = outerli.style.fontSize;
									if (fontSize && li.style.fontSize === "") {
										li.setAttribute("style", `${span.getAttribute("style")}; font-size: ${fontSize}`);
									}
								}
								const fontSize = li.style.fontSize;
								if (fontSize && span.style.fontSize === "") {
									span.setAttribute("style", `${span.getAttribute("style")}; font-size: ${fontSize}`);
								}
							}
							const pp = span.parentElement?.parentElement;
							if (pp && span.parentElement.tagName === "A") {
								const fontSize = pp.style.fontSize;
								if (fontSize && span.style.fontSize === "") {
									span.setAttribute("style", `${span.getAttribute("style")}; font-size: ${fontSize}`);
								}
							}
						});
						console.log("Converted HTML:", body.innerHTML);
						// this.editor.setData(body.innerHTML);
						const viewFragment = editor.data.processor.toView(body.innerHTML);
						const modelFragment = editor.data.toModel(viewFragment);
						model.insertContent(modelFragment);
					} catch (error) {
						console.error("Error uploading file:", error);
						throw error;
					}

					editor.editing.view.focus();
				});
			} );

			return view;
		} );
	}
}