import { Extension } from "@tiptap/core";
import { Plugin, PluginKey } from "@tiptap/pm/state";
//#region src/character-count/character-count.ts
/**
* This extension allows you to count the characters and words of your document.
* @see https://tiptap.dev/api/extensions/character-count
*/
const CharacterCount = Extension.create({
	name: "characterCount",
	addOptions() {
		return {
			limit: null,
			autoTrim: true,
			mode: "textSize",
			textCounter: (text) => text.length,
			wordCounter: (text) => text.split(" ").filter((word) => word !== "").length
		};
	},
	addStorage() {
		return {
			characters: () => 0,
			words: () => 0
		};
	},
	onBeforeCreate() {
		this.storage.characters = (options) => {
			const node = (options === null || options === void 0 ? void 0 : options.node) || this.editor.state.doc;
			if (((options === null || options === void 0 ? void 0 : options.mode) || this.options.mode) === "textSize") {
				const text = node.textBetween(0, node.content.size, void 0, " ");
				return this.options.textCounter(text);
			}
			return node.nodeSize;
		};
		this.storage.words = (options) => {
			const node = (options === null || options === void 0 ? void 0 : options.node) || this.editor.state.doc;
			const text = node.textBetween(0, node.content.size, " ", " ");
			return this.options.wordCounter(text);
		};
	},
	addProseMirrorPlugins() {
		let initialEvaluationDone = false;
		return [new Plugin({
			key: new PluginKey("characterCount"),
			appendTransaction: (transactions, oldState, newState) => {
				if (initialEvaluationDone) return;
				const limit = this.options.limit;
				const autoTrim = this.options.autoTrim;
				if (limit === null || limit === void 0 || limit === 0 || autoTrim === false) {
					initialEvaluationDone = true;
					return;
				}
				const initialContentSize = this.storage.characters({ node: newState.doc });
				if (initialContentSize > limit) {
					const over = initialContentSize - limit;
					const from = 0;
					const to = over;
					console.warn(`[CharacterCount] Initial content exceeded limit of ${limit} characters. Content was automatically trimmed.`);
					const tr = newState.tr.deleteRange(from, to);
					initialEvaluationDone = true;
					return tr;
				}
				initialEvaluationDone = true;
			},
			filterTransaction: (transaction, state) => {
				const limit = this.options.limit;
				if (!transaction.docChanged || limit === 0 || limit === null || limit === void 0) return true;
				const oldSize = this.storage.characters({ node: state.doc });
				const newSize = this.storage.characters({ node: transaction.doc });
				if (newSize <= limit) return true;
				if (oldSize > limit && newSize > limit && newSize <= oldSize) return true;
				if (oldSize > limit && newSize > limit && newSize > oldSize) return false;
				if (!transaction.getMeta("paste")) return false;
				const pos = transaction.selection.$head.pos;
				const from = pos - (newSize - limit);
				const to = pos;
				transaction.deleteRange(from, to);
				if (this.storage.characters({ node: transaction.doc }) > limit) return false;
				return true;
			}
		})];
	}
});
//#endregion
export { CharacterCount };

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