const Note = require('lib/models/Note.js');
const TextWidget = require('tkwidgets/TextWidget.js');
const { _ } = require('lib/locale.js');

class NoteWidget extends TextWidget {

	constructor() {
		super();
		this.noteId_ = 0;
		this.note_ = null;
		this.notes_ = [];
		this.lastLoadedNoteId_ = null;
	}

	get notes() {
		return this.notes_;
	}

	set notes(v) {
		// If the note collection has changed it means the current note might
		// have changed or has been deleted, so refresh the note.
		this.notes_ = v;
		this.reloadNote();
	}

	get noteId() {
		return this.noteId_;
	}

	set noteId(v) {
		this.noteId_ = v;
		this.note_ = null;
		this.reloadNote();
	}

	welcomeText() {
		return _('Welcome to Joplin!\n\nType `:help shortcuts` for the list of keyboard shortcuts, or just `:help` for usage information.\n\nFor example, to create a notebook press `mb`; to create a note press `mn`.');
	}

	reloadNote() {
		if (!this.noteId_ && !this.notes.length) {
			this.text = this.welcomeText();
			this.scrollTop = 0;
		} else if (this.noteId_) {
			this.doAsync('loadNote', async () => {
				this.note_ = await Note.load(this.noteId_);
				
				if (this.note_ && this.note_.encryption_applied) {
					this.text = _('One or more items are currently encrypted and you may need to supply a master password. To do so please type `e2ee decrypt`. If you have already supplied the password, the encrypted items are being decrypted in the background and will be available soon.');
				} else {
					this.text = this.note_ ? this.note_.title + "\n\n" + this.note_.body : '';
				}

				if (this.lastLoadedNoteId_ !== this.noteId_) this.scrollTop = 0;
				this.lastLoadedNoteId_ = this.noteId_;
			});
		} else {
			this.text = '';
			this.scrollTop = 0;
		}
	}

}

module.exports = NoteWidget;