import { App, normalizePath, MarkdownView, Plugin, PluginSettingTab, Setting,  getAllTags,  CachedMetadata,  TFile } from 'obsidian';
import { PromptModal } from 'src/Modals/PromptModal';
import { Notes } from 'src/Models/Notes';
import { StudyNote, DIRECTORYPATH } from 'src/StudyNote';

interface MemorizeSettings {
	deleteNotes: boolean;
  createTabs: boolean
}

const DEFAULT_SETTINGS: MemorizeSettings = {
	deleteNotes: false,
  createTabs: true
}

export default class Learning extends Plugin {
	settings: MemorizeSettings;
	private notes: Array<Notes>;
	private suggestionResults: any | null
	private currentLearningNoteIndex: number
  private currentLearningNote: StudyNote
	private filteredTitles: any
  private studyNotes: StudyNote[]

	async onload() {
		console.log('loading plugin - Memorization')
		await this.loadSettings();
		try {
			await this.app.vault.createFolder(DIRECTORYPATH)
		} catch(error){
      console.log('Skipping creation of Memorization folder: ' + error.message)
		}

		this.currentLearningNoteIndex = 0
		this.notes = []
    this.studyNotes = []

		this.app.workspace.onLayoutReady( () => {
				const files =  this.app.vault.getMarkdownFiles()
				let notes: Notes[] = [];

				let i = 0;
				files.forEach( (file) => {
				  const cache = this.app.metadataCache.getCache(file.path)
					const tags = getAllTags(cache as CachedMetadata)

					notes.push({ id: i, tags: tags, title: file.path, path: this.app.vault.getResourcePath(file)})
					i++
				})

				this.notes = notes
		})

		this.addRibbonIcon('brain-cog', 'Memorize Notes', async () => {
			this.suggestionResults = await new PromptModal(this.app, this.notes).open()
			this.filteredTitles = this.suggestionResults.titles
			this.suggestionResults.titles = this.filteredTitles

			const p = this.suggestionResults.titlePaths[0].path
			const s = normalizePath(p)

			for (const titlePath of this.suggestionResults.titlePaths) {
        		this.studyNotes.push(new StudyNote(this.app, titlePath.title, normalizePath(titlePath.path)))
			}

      this.studyNotes = this.studyNotes.sort((a, b) => a.interval - b.interval);

      this.currentLearningNote = this.studyNotes[this.currentLearningNoteIndex]
      this.studyNotes[this.currentLearningNoteIndex].display(this.settings.createTabs)
		});

		// This adds a complex command that can check whether the current state of the app allows execution of the command
		this.addCommand({
			id: 'open-sample-modal-complex',
			name: 'Open sample modal (complex)',
			checkCallback: (checking: boolean) => {

					if (!checking) {
            (async () => {
              this.suggestionResults = await new PromptModal(this.app, this.notes).open()
              this.filteredTitles = this.suggestionResults.titles
			  this.suggestionResults.titles = this.filteredTitles
        
              for (const titlePath of this.suggestionResults.titlePaths) {
                this.studyNotes.push(new StudyNote(this.app, titlePath.title, normalizePath(titlePath.path)))
              }
        
              this.studyNotes = this.studyNotes.sort((a, b) => a.interval - b.interval);
              
              this.currentLearningNote = this.studyNotes[this.currentLearningNoteIndex]
              this.studyNotes[this.currentLearningNoteIndex].display(this.settings.createTabs)
            })();
					}

          return true
			}
		});

		// This adds a settings tab so the user can configure various aspects of the plugin
		this.addSettingTab(new MemorizeSettingTab(this.app, this));

		// // If the plugin hooks up any global DOM events (on parts of the app that doesn't belong to this plugin)
		// // Using this function will automatically remove the event listener when this plugin is disabled.
		this.registerDomEvent(document, 'click', async (evt: PointerEvent) => {
			const element = evt.composedPath()[0] as HTMLInputElement;
			if(element.id.contains("memorize-plugin-radio")){
        this.currentLearningNote.setQuality(element.value)
			} else if (element.id.contains("memorize-plugin-button")) {
       	const activeView = this.app.workspace.getActiveViewOfType(MarkdownView);
				if (activeView) {
          if(this.settings.deleteNotes){
            if(this.currentLearningNote){
              this.currentLearningNote.deleteNote()
              this.studyNotes.remove(this.currentLearningNote)
              this.currentLearningNoteIndex -= 1
            }
          } else {
            if(this.currentLearningNote){
              this.currentLearningNote.updateNoteText()
            }
          }

          const nextIndex = this.currentLearningNoteIndex + 1
          if (nextIndex < this.studyNotes.length){
            this.currentLearningNoteIndex = nextIndex

            this.currentLearningNote = this.studyNotes[nextIndex]
            if(this.currentLearningNote){
              this.currentLearningNote.display(this.settings.createTabs)
            }
          } else {
            this.currentLearningNoteIndex = 0
            this.studyNotes = this.studyNotes.sort((a, b) => a.interval - b.interval);
            this.currentLearningNote = this.studyNotes[this.currentLearningNoteIndex]

            if(this.currentLearningNote){
              this.currentLearningNote.display(this.settings.createTabs)
            }
          }
        }
      }
		});
	}

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

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

class MemorizeSettingTab extends PluginSettingTab {
	plugin: Learning;

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

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

		containerEl.empty();

		containerEl.createEl('h2', {text: 'Settings'});

		new Setting(containerEl)
			.setName('Delete memorization notes after creation')
			.setDesc('Note: this will disable the spaced repetition feature.')
			.addToggle((toggle) => toggle
      .setValue(this.plugin.settings.deleteNotes)
      .onChange(async (value) => {
        this.plugin.settings.deleteNotes = value
        await this.plugin.saveSettings()
      }))
    
      new Setting(containerEl)
			.setName('Enable creation of new tabs')
			.setDesc('By default, when you go to the next note in the sequence, a new tab is not created. Enable this if you\'d like a new tab created.')
			.addToggle((toggle) => toggle
      .setValue(this.plugin.settings.createTabs)
      .onChange(async (value) => {
        this.plugin.settings.createTabs = value
        await this.plugin.saveSettings()
      }))
	}
}