const React = require('react'); const Component = React.Component;
const { AppState, View, Button, Text, StyleSheet } = require('react-native');
const { stateUtils } = require('lib/reducer.js');
const { connect } = require('react-redux');
const { reg } = require('lib/registry.js');
const { NoteList } = require('lib/components/note-list.js');
const Folder = require('lib/models/Folder.js');
const Tag = require('lib/models/Tag.js');
const Note = require('lib/models/Note.js');
const Setting = require('lib/models/Setting.js');
const { themeStyle } = require('lib/components/global-style.js');
const { ScreenHeader } = require('lib/components/screen-header.js');
const { MenuOption } = require('react-native-popup-menu');
const { _ } = require('lib/locale.js');
const { ActionButton } = require('lib/components/action-button.js');
const { dialogs } = require('lib/dialogs.js');
const DialogBox = require('react-native-dialogbox').default;
const { BaseScreenComponent } = require('lib/components/base-screen.js');

class NotesScreenComponent extends BaseScreenComponent {
	
	static navigationOptions(options) {
		return { header: null };
	}

	constructor() {
		super();

		this.onAppStateChange_ = async () => {
			// Force an update to the notes list when app state changes
			let newProps = Object.assign({}, this.props);
			newProps.notesSource = '';
			await this.refreshNotes(newProps);
		}

		this.sortButton_press = async () => {
			const buttons = [];
			const sortNoteOptions = Setting.enumOptions('notes.sortOrder.field');

			const makeCheckboxText = function(selected, sign, label) {
				const s = sign === 'tick' ? '✓' : '⬤'
				return (selected ? (s + ' ') : '') + label;
			}

			for (let field in sortNoteOptions) {
				if (!sortNoteOptions.hasOwnProperty(field)) continue;
				buttons.push({
					text: makeCheckboxText(Setting.value('notes.sortOrder.field') === field, 'bullet', sortNoteOptions[field]),
					id: { name: 'notes.sortOrder.field', value: field },
				});
			}

			buttons.push({
				text: makeCheckboxText(Setting.value('notes.sortOrder.reverse'), 'tick', '[ ' + Setting.settingMetadata('notes.sortOrder.reverse').label() + ' ]'),
				id: { name: 'notes.sortOrder.reverse', value: !Setting.value('notes.sortOrder.reverse') },
			});

			buttons.push({
				text: makeCheckboxText(Setting.value('uncompletedTodosOnTop'), 'tick', '[ ' + Setting.settingMetadata('uncompletedTodosOnTop').label() + ' ]'),
				id: { name: 'uncompletedTodosOnTop', value: !Setting.value('uncompletedTodosOnTop') },
			});

			buttons.push({
				text: makeCheckboxText(Setting.value('showCompletedTodos'), 'tick', '[ ' + Setting.settingMetadata('showCompletedTodos').label() + ' ]'),
				id: { name: 'showCompletedTodos', value: !Setting.value('showCompletedTodos') },
			});

			const r = await dialogs.pop(this, Setting.settingMetadata('notes.sortOrder.field').label(), buttons);
			if (!r) return;

			Setting.setValue(r.name, r.value);
		}
	}

	styles() {
		if (!this.styles_) this.styles_ = {};
		const themeId = this.props.theme;
		const theme = themeStyle(themeId);
		const cacheKey = themeId;

		if (this.styles_[cacheKey]) return this.styles_[cacheKey];
		this.styles_ = {};

		let styles = {
			noteList: {
				flex: 1,
			},
		};

		this.styles_[cacheKey] = StyleSheet.create(styles);
		return this.styles_[cacheKey];
	}

	async componentDidMount() {
		await this.refreshNotes();
		AppState.addEventListener('change', this.onAppStateChange_);
	}

	async componentWillUnmount() {
		AppState.removeEventListener('change', this.onAppStateChange_);
	}

		async componentDidUpdate(prevProps) {
			if (prevProps.notesOrder !== this.props.notesOrder ||
				prevProps.selectedFolderId != this.props.selectedFolderId ||
				prevProps.selectedTagId != this.props.selectedTagId ||
				prevProps.selectedSmartFilterId != this.props.selectedSmartFilterId ||
				prevProps.notesParentType != this.props.notesParentType) {
					await this.refreshNotes(this.props);
			}
		}

	async refreshNotes(props = null) {
		if (props === null) props = this.props;

		let options = {
			order: props.notesOrder,
			uncompletedTodosOnTop: props.uncompletedTodosOnTop,
			showCompletedTodos: props.showCompletedTodos,
			caseInsensitive: true,
		};

		const parent = this.parentItem(props);
		if (!parent) return;

		const source = JSON.stringify({
			options: options,
			parentId: parent.id,
		});

		if (source == props.notesSource) return;

		let notes = [];
		if (props.notesParentType === 'Folder') {
			notes = await Note.previews(props.selectedFolderId, options);
		} else if (props.notesParentType === 'Tag') {
			notes = await Tag.notes(props.selectedTagId, options);
		} else if (props.notesParentType === 'SmartFilter') {
			notes = await Note.previews(null, options);
		}

		this.props.dispatch({
			type: 'NOTE_UPDATE_ALL',
			notes: notes,
			notesSource: source,
		});
	}

	deleteFolder_onPress(folderId) {
		dialogs.confirm(this, _('Delete notebook? All notes and sub-notebooks within this notebook will also be deleted.')).then((ok) => {
			if (!ok) return;

			Folder.delete(folderId).then(() => {
				this.props.dispatch({
					type: 'NAV_GO',
					routeName: 'Notes',
					smartFilterId: 'c3176726992c11e9ac940492261af972',
				});
			}).catch((error) => {
				alert(error.message);
			});
		});
	}

	editFolder_onPress(folderId) {
		this.props.dispatch({
			type: 'NAV_GO',
			routeName: 'Folder',
			folderId: folderId,
		});
	}

	parentItem(props = null) {
		if (!props) props = this.props;

		let output = null;
		if (props.notesParentType == 'Folder') {
			output = Folder.byId(props.folders, props.selectedFolderId);
		} else if (props.notesParentType == 'Tag') {
			output = Tag.byId(props.tags, props.selectedTagId);
		} else if (props.notesParentType == 'SmartFilter') {
			output = { id: this.props.selectedSmartFilterId, title: _('All notes') };
		} else {
			return null;
			throw new Error('Invalid parent type: ' + props.notesParentType);
		}
		return output;
	}

	folderPickerOptions() {
		const options = {
			enabled: this.props.noteSelectionEnabled,
			mustSelect: true,
		};

		if (this.folderPickerOptions_ && options.enabled === this.folderPickerOptions_.enabled) return this.folderPickerOptions_;

		this.folderPickerOptions_ = options;
		return this.folderPickerOptions_;
	}

	render() {
		const parent = this.parentItem();
		const theme = themeStyle(this.props.theme);

		let rootStyle = {
			flex: 1,
			backgroundColor: theme.backgroundColor,
		}

		if (!this.props.visible) {
			rootStyle.flex = 0.001; // This is a bit of a hack but it seems to work fine - it makes the component invisible but without unmounting it
		}

		if (!parent) {
			return (
				<View style={rootStyle}>
					<ScreenHeader title={title} />
				</View>
			)
		}

		let title = parent ? parent.title : null;
		const addFolderNoteButtons = this.props.selectedFolderId && this.props.selectedFolderId != Folder.conflictFolderId();
		const thisComp = this;
		const actionButtonComp = this.props.noteSelectionEnabled || !this.props.visible ? null : <ActionButton addFolderNoteButtons={addFolderNoteButtons} parentFolderId={this.props.selectedFolderId}></ActionButton>

		return (
			<View style={rootStyle}>
				<ScreenHeader
					title={title}
					showBackButton={false}
					parentComponent={thisComp}
					sortButton_press={this.sortButton_press}
					folderPickerOptions={this.folderPickerOptions()}
					showSearchButton={true}
					showSideMenuButton={true}
				/>
				<NoteList style={this.styles().noteList}/>
				{ actionButtonComp }
				<DialogBox ref={dialogbox => { this.dialogbox = dialogbox }}/>
			</View>
		);
	}
}

const NotesScreen = connect(
	(state) => {
		return {
			folders: state.folders,
			tags: state.tags,
			selectedFolderId: state.selectedFolderId,
			selectedNoteIds: state.selectedNoteIds,
			selectedTagId: state.selectedTagId,
			selectedSmartFilterId: state.selectedSmartFilterId,
			notesParentType: state.notesParentType,
			notes: state.notes,
			notesSource: state.notesSource,
			uncompletedTodosOnTop: state.settings.uncompletedTodosOnTop,
			showCompletedTodos: state.settings.showCompletedTodos,
			theme: state.settings.theme,
			noteSelectionEnabled: state.noteSelectionEnabled,
			notesOrder: stateUtils.notesOrder(state.settings),
		};
	}
)(NotesScreenComponent)

module.exports = { NotesScreen };