import { Editor, MarkdownView, Plugin, TFile, PluginSettingTab, App, Setting } from 'obsidian';
import { exec } from "child_process";

const plist = require('plist'); 

interface MacTagSettings {
	writeOnSave: boolean;
}

const DEFAULT_SETTINGS: MacTagSettings = {
	writeOnSave: true
}

export default class MacTagPlugin extends Plugin {
	settings: MacTagSettings;

	async onload() {
		await this.loadSettings();

		this.addSettingTab(new MacTagSettingTab(this.app, this));

		this.addCommand({
			id: 'write-macos-tag',
			name: "Write Mac OS tags",
			editorCallback: (editor: Editor, view: MarkdownView) => {
				this.writeTags(view.file);
			}
		});

		this.addCommand({
			id: 'write-macos-tag-folder',
			name: "Write Mac OS tags for current folder",
			editorCallback: (editor: Editor, view: MarkdownView) => {
				view.file.parent.children.forEach((file) => {
					if (file instanceof TFile) {
						this.writeTags(file);
					}
				})
				
			}
		});
	}

	onunload() {
	}

	async loadSettings() {
		this.settings = Object.assign({}, DEFAULT_SETTINGS, await this.loadData());
	}

	async saveSettings() {
		await this.saveData(this.settings);
	}


	writeTags(file: TFile) {
		//@ts-ignore
		const fileWithPath = `${this.app.vault.adapter.basePath}/${file.path}`;
		const plTags: string = plist.build(this.getTags(file));

		exec(`xattr -w com.apple.metadata:_kMDItemUserTags '${plTags}' '${fileWithPath}'`,(error, stdout, stderr) => {
			if (error) {
				console.log(`error: ${error.message}`);
				return;
			}
			if (stderr) {
				console.log(`stderr: ${stderr}`);
				return;
			}
		});
	}

	getTags(file: TFile): string[] {
		const tags: string[] = [];
		const metadata = this.app.metadataCache.getFileCache(file);
		if (metadata?.tags) {
			metadata.tags.forEach(function (value) {
				tags.push(value.tag);
			});
		}
		if (metadata?.frontmatter) {
			if (metadata.frontmatter.tags){
				const frontmattertags: string[] = typeof metadata.frontmatter.tags === "string" ? [metadata.frontmatter.tags] : metadata.frontmatter.tags;
				frontmattertags.forEach(function (value) {
					tags.push(value);
				});
			}
		}
		return tags.map((s: string)=> s.replace("#", ""))
	}
}

class MacTagSettingTab extends PluginSettingTab {
	plugin: MacTagPlugin;

	constructor(app: App, plugin: MacTagPlugin) {
		super(app, plugin);
		this.plugin = plugin;
	}

	display(): void {
		const {containerEl} = this;

		containerEl.empty();
		containerEl.createEl('h2', {text: 'Settings for Mac Tagger Plugin.'});

		new Setting(containerEl)
			.setName('Write on Save')
			.setDesc('Check the box if you want to save tags when saving the file.')
			.addToggle(tc => tc.onChange(async (value) => {
				this.plugin.settings.writeOnSave = value;
				await this.plugin.saveSettings();
			}))
	}

}