const React = require("react");
const Component = React.Component;
const { connect } = require("react-redux");
const { Platform, View, Text, Button, StyleSheet, TouchableOpacity, Image, ScrollView, Dimensions } = require("react-native");
const Icon = require("react-native-vector-icons/Ionicons").default;
const { Log } = require("lib/log.js");
const { BackButtonService } = require("lib/services/back-button.js");
const NavService = require("lib/services/NavService.js");
const { ReportService } = require("lib/services/report.js");
const { Menu, MenuOptions, MenuOption, MenuTrigger } = require("react-native-popup-menu");
const { _ } = require("lib/locale.js");
const Setting = require("lib/models/Setting.js");
const Note = require("lib/models/Note.js");
const Folder = require("lib/models/Folder.js");
const { FileApi } = require("lib/file-api.js");
const { FileApiDriverOneDrive } = require("lib/file-api-driver-onedrive.js");
const { reg } = require("lib/registry.js");
const { themeStyle } = require("lib/components/global-style.js");
const { ItemList } = require("lib/components/ItemList.js");
const { Dropdown } = require("lib/components/Dropdown.js");
const { time } = require("lib/time-utils");
const RNFS = require("react-native-fs");
const { dialogs } = require("lib/dialogs.js");
const DialogBox = require("react-native-dialogbox").default;

// Rather than applying a padding to the whole bar, it is applied to each
// individual component (button, picker, etc.) so that the touchable areas
// are widder and to give more room to the picker component which has a larger
// default height.
const PADDING_V = 10;

class ScreenHeaderComponent extends Component {
	constructor() {
		super();
		this.styles_ = {};
	}

	styles() {
		const themeId = Setting.value("theme");
		if (this.styles_[themeId]) return this.styles_[themeId];
		this.styles_ = {};

		const theme = themeStyle(themeId);

		let styleObject = {
			container: {
				flexDirection: "column",
				backgroundColor: theme.raisedBackgroundColor,
				alignItems: "center",
				shadowColor: "#000000",
				elevation: 5,
				paddingTop: Platform.OS === "ios" ? 15 : 0, // Extra padding for iOS because the top icons are there
			},
			divider: {
				borderBottomWidth: 1,
				borderColor: theme.dividerColor,
				backgroundColor: "#0000ff",
			},
			sideMenuButton: {
				flex: 1,
				alignItems: "center",
				backgroundColor: theme.raisedBackgroundColor,
				paddingLeft: theme.marginLeft,
				paddingRight: 5,
				marginRight: 2,
				paddingTop: PADDING_V,
				paddingBottom: PADDING_V,
			},
			iconButton: {
				flex: 1,
				backgroundColor: theme.raisedBackgroundColor,
				paddingLeft: 15,
				paddingRight: 15,
				paddingTop: PADDING_V,
				paddingBottom: PADDING_V,
			},
			saveButton: {
				flex: 0,
				flexDirection: "row",
				alignItems: "center",
				padding: 10,
				borderWidth: 1,
				borderColor: theme.raisedHighlightedColor,
				borderRadius: 4,
				marginRight: 8,
			},
			saveButtonText: {
				textAlignVertical: "center",
				color: theme.raisedHighlightedColor,
				fontWeight: "bold",
			},
			savedButtonIcon: {
				fontSize: 20,
				color: theme.raisedHighlightedColor,
				width: 18,
				height: 18,
			},
			saveButtonIcon: {
				width: 18,
				height: 18,
			},
			contextMenuTrigger: {
				fontSize: 25,
				paddingRight: theme.marginRight,
				color: theme.raisedColor,
				fontWeight: "bold",
			},
			contextMenu: {
				backgroundColor: theme.raisedBackgroundColor,
			},
			contextMenuItem: {
				backgroundColor: theme.backgroundColor,
			},
			contextMenuItemText: {
				flex: 1,
				textAlignVertical: "center",
				paddingLeft: theme.marginLeft,
				paddingRight: theme.marginRight,
				paddingTop: theme.itemMarginTop,
				paddingBottom: theme.itemMarginBottom,
				color: theme.color,
				backgroundColor: theme.backgroundColor,
				fontSize: theme.fontSize,
			},
			titleText: {
				flex: 1,
				textAlignVertical: "center",
				marginLeft: 0,
				color: theme.raisedHighlightedColor,
				fontWeight: "bold",
				fontSize: theme.fontSize,
			},
			warningBox: {
				backgroundColor: "#ff9900",
				flexDirection: "row",
				padding: theme.marginLeft,
			},
		};

		styleObject.topIcon = Object.assign({}, theme.icon);
		styleObject.topIcon.flex = 1;
		styleObject.topIcon.textAlignVertical = "center";
		styleObject.topIcon.color = theme.raisedColor;

		styleObject.backButton = Object.assign({}, styleObject.iconButton);
		styleObject.backButton.marginRight = 1;

		styleObject.backButtonDisabled = Object.assign({}, styleObject.backButton, { opacity: theme.disabledOpacity });
		styleObject.saveButtonDisabled = Object.assign({}, styleObject.saveButton, { opacity: theme.disabledOpacity });

		this.styles_[themeId] = StyleSheet.create(styleObject);
		return this.styles_[themeId];
	}

	sideMenuButton_press() {
		this.props.dispatch({ type: "SIDE_MENU_TOGGLE" });
	}

	async backButton_press() {
		await BackButtonService.back();
	}

	searchButton_press() {
		NavService.go("Search");
	}

	async deleteButton_press() {
		// Dialog needs to be displayed as a child of the parent component, otherwise
		// it won't be visible within the header component.
		const ok = await dialogs.confirm(this.props.parentComponent, _("Delete these notes?"));
		if (!ok) return;

		const noteIds = this.props.selectedNoteIds;
		this.props.dispatch({ type: "NOTE_SELECTION_END" });
		await Note.batchDelete(noteIds);
	}

	menu_select(value) {
		if (typeof value == "function") {
			value();
		}
	}

	log_press() {
		NavService.go("Log");
	}

	status_press() {
		NavService.go("Status");
	}

	config_press() {
		NavService.go("Config");
	}

	encryptionConfig_press() {
		NavService.go("EncryptionConfig");
	}

	warningBox_press() {
		NavService.go("EncryptionConfig");
	}

	async debugReport_press() {
		const service = new ReportService();

		const logItems = await reg.logger().lastEntries(null);
		const logItemRows = [["Date", "Level", "Message"]];
		for (let i = 0; i < logItems.length; i++) {
			const item = logItems[i];
			logItemRows.push([time.formatMsToLocal(item.timestamp, "MM-DDTHH:mm:ss"), item.level, item.message]);
		}
		const logItemCsv = service.csvCreate(logItemRows);

		const itemListCsv = await service.basicItemList({ format: "csv" });
		const filePath = RNFS.ExternalDirectoryPath + "/syncReport-" + new Date().getTime() + ".txt";

		const finalText = [logItemCsv, itemListCsv].join("\n================================================================================\n");

		await RNFS.writeFile(filePath, finalText);
		alert("Debug report exported to " + filePath);
	}

	render() {
		function sideMenuButton(styles, onPress) {
			return (
				<TouchableOpacity onPress={onPress}>
					<View style={styles.sideMenuButton}>
						<Icon name="md-menu" style={styles.topIcon} />
					</View>
				</TouchableOpacity>
			);
		}

		function backButton(styles, onPress, disabled) {
			return (
				<TouchableOpacity onPress={onPress} disabled={disabled}>
					<View style={disabled ? styles.backButtonDisabled : styles.backButton}>
						<Icon name="md-arrow-back" style={styles.topIcon} />
					</View>
				</TouchableOpacity>
			);
		}

		function saveButton(styles, onPress, disabled, show) {
			if (!show) return null;

			const icon = disabled ? <Icon name="md-checkmark" style={styles.savedButtonIcon} /> : <Image style={styles.saveButtonIcon} source={require("./SaveIcon.png")} />;

			return (
				<TouchableOpacity onPress={onPress} disabled={disabled} style={{ padding: 0 }}>
					<View style={disabled ? styles.saveButtonDisabled : styles.saveButton}>{icon}</View>
				</TouchableOpacity>
			);
		}

		function searchButton(styles, onPress) {
			return (
				<TouchableOpacity onPress={onPress}>
					<View style={styles.iconButton}>
						<Icon name="md-search" style={styles.topIcon} />
					</View>
				</TouchableOpacity>
			);
		}

		function deleteButton(styles, onPress) {
			return (
				<TouchableOpacity onPress={onPress}>
					<View style={styles.iconButton}>
						<Icon name="md-trash" style={styles.topIcon} />
					</View>
				</TouchableOpacity>
			);
		}

		function sortButton(styles, onPress) {
			return (
				<TouchableOpacity onPress={onPress}>
					<View style={styles.iconButton}>
						<Icon name="md-funnel" style={styles.topIcon} />
					</View>
				</TouchableOpacity>
			);
		}

		let key = 0;
		let menuOptionComponents = [];

		if (!this.props.noteSelectionEnabled) {
			for (let i = 0; i < this.props.menuOptions.length; i++) {
				let o = this.props.menuOptions[i];

				if (o.isDivider) {
					menuOptionComponents.push(<View key={"menuOption_" + key++} style={this.styles().divider} />);
				} else {
					menuOptionComponents.push(
						<MenuOption value={o.onPress} key={"menuOption_" + key++} style={this.styles().contextMenuItem}>
							<Text style={this.styles().contextMenuItemText}>{o.title}</Text>
						</MenuOption>
					);
				}
			}

			if (this.props.showAdvancedOptions) {
				if (menuOptionComponents.length) {
					menuOptionComponents.push(<View key={"menuOption_showAdvancedOptions"} style={this.styles().divider} />);
				}

				menuOptionComponents.push(
					<MenuOption value={() => this.log_press()} key={"menuOption_log"} style={this.styles().contextMenuItem}>
						<Text style={this.styles().contextMenuItemText}>{_("Log")}</Text>
					</MenuOption>
				);

				menuOptionComponents.push(
					<MenuOption value={() => this.status_press()} key={"menuOption_status"} style={this.styles().contextMenuItem}>
						<Text style={this.styles().contextMenuItemText}>{_("Status")}</Text>
					</MenuOption>
				);

				if (Platform.OS === "android") {
					menuOptionComponents.push(
						<MenuOption value={() => this.debugReport_press()} key={"menuOption_debugReport"} style={this.styles().contextMenuItem}>
							<Text style={this.styles().contextMenuItemText}>{_("Export Debug Report")}</Text>
						</MenuOption>
					);
				}
			}

			if (menuOptionComponents.length) {
				menuOptionComponents.push(<View key={"menuOption_" + key++} style={this.styles().divider} />);
			}

			menuOptionComponents.push(
				<MenuOption value={() => this.encryptionConfig_press()} key={"menuOption_encryptionConfig"} style={this.styles().contextMenuItem}>
					<Text style={this.styles().contextMenuItemText}>{_("Encryption Config")}</Text>
				</MenuOption>
			);

			menuOptionComponents.push(
				<MenuOption value={() => this.config_press()} key={"menuOption_config"} style={this.styles().contextMenuItem}>
					<Text style={this.styles().contextMenuItemText}>{_("Configuration")}</Text>
				</MenuOption>
			);
		} else {
			menuOptionComponents.push(
				<MenuOption value={() => this.deleteButton_press()} key={"menuOption_delete"} style={this.styles().contextMenuItem}>
					<Text style={this.styles().contextMenuItemText}>{_("Delete")}</Text>
				</MenuOption>
			);
		}

		const createTitleComponent = () => {
			const themeId = Setting.value("theme");
			const theme = themeStyle(themeId);
			const folderPickerOptions = this.props.folderPickerOptions;

			if (folderPickerOptions && folderPickerOptions.enabled) {
				const titlePickerItems = mustSelect => {
					let output = [];
					if (mustSelect) output.push({ label: _("Move to notebook..."), value: null });
					for (let i = 0; i < this.props.folders.length; i++) {
						let f = this.props.folders[i];
						output.push({ label: Folder.displayTitle(f), value: f.id });
					}
					output.sort((a, b) => {
						if (a.value === null) return -1;
						if (b.value === null) return +1;
						return a.label.toLowerCase() < b.label.toLowerCase() ? -1 : +1;
					});
					return output;
				};

				return (
					<Dropdown
						items={titlePickerItems(!!folderPickerOptions.mustSelect)}
						itemHeight={35}
						selectedValue={"selectedFolderId" in folderPickerOptions ? folderPickerOptions.selectedFolderId : null}
						itemListStyle={{
							backgroundColor: theme.backgroundColor,
						}}
						headerStyle={{
							color: theme.raisedHighlightedColor,
							fontSize: theme.fontSize,
						}}
						itemStyle={{
							color: theme.color,
							fontSize: theme.fontSize,
						}}
						onValueChange={async (folderId, itemIndex) => {
							// If onValueChange is specified, use this as a callback, otherwise do the default
							// which is to take the selectedNoteIds from the state and move them to the
							// chosen folder.

							if (folderPickerOptions.onValueChange) {
								folderPickerOptions.onValueChange(folderId, itemIndex);
								return;
							}

							if (!folderId) return;
							const noteIds = this.props.selectedNoteIds;
							if (!noteIds.length) return;

							const folder = await Folder.load(folderId);

							const ok = noteIds.length > 1 ? await dialogs.confirm(this.props.parentComponent, _('Move %d notes to notebook "%s"?', noteIds.length, folder.title)) : true;
							if (!ok) return;

							this.props.dispatch({ type: "NOTE_SELECTION_END" });
							for (let i = 0; i < noteIds.length; i++) {
								await Note.moveToFolder(noteIds[i], folderId);
							}
						}}
					/>
				);
			} else {
				let title = "title" in this.props && this.props.title !== null ? this.props.title : "";
				return <Text style={this.styles().titleText}>{title}</Text>;
			}
		};

		const warningComp = this.props.showMissingMasterKeyMessage ? (
			<TouchableOpacity style={this.styles().warningBox} onPress={() => this.warningBox_press()} activeOpacity={0.8}>
				<Text style={{ flex: 1 }}>{_("Press to set the decryption password.")}</Text>
			</TouchableOpacity>
		) : null;

		const titleComp = createTitleComponent();
		const sideMenuComp = this.props.noteSelectionEnabled ? null : sideMenuButton(this.styles(), () => this.sideMenuButton_press());
		const backButtonComp = backButton(this.styles(), () => this.backButton_press(), !this.props.historyCanGoBack);
		const searchButtonComp = this.props.noteSelectionEnabled ? null : searchButton(this.styles(), () => this.searchButton_press());
		const deleteButtonComp = this.props.noteSelectionEnabled ? deleteButton(this.styles(), () => this.deleteButton_press()) : null;
		const sortButtonComp = this.props.sortButton_press ? sortButton(this.styles(), () => this.props.sortButton_press()) : null;
		const windowHeight = Dimensions.get("window").height - 50;

		const menuComp = (
			<Menu onSelect={value => this.menu_select(value)} style={this.styles().contextMenu}>
				<MenuTrigger style={{ paddingTop: PADDING_V, paddingBottom: PADDING_V }}>
					<Text style={this.styles().contextMenuTrigger}> &#8942;</Text>
				</MenuTrigger>
				<MenuOptions>
					<ScrollView style={{ maxHeight: windowHeight }}>{menuOptionComponents}</ScrollView>
				</MenuOptions>
			</Menu>
		);

		return (
			<View style={this.styles().container}>
				<View style={{ flexDirection: "row", alignItems: "center" }}>
					{sideMenuComp}
					{backButtonComp}
					{saveButton(
						this.styles(),
						() => {
							if (this.props.onSaveButtonPress) this.props.onSaveButtonPress();
						},
						this.props.saveButtonDisabled === true,
						this.props.showSaveButton === true
					)}
					{titleComp}
					{searchButtonComp}
					{deleteButtonComp}
					{sortButtonComp}
					{menuComp}
				</View>
				{warningComp}
				<DialogBox
					ref={dialogbox => {
						this.dialogbox = dialogbox;
					}}
				/>
			</View>
		);
	}
}

ScreenHeaderComponent.defaultProps = {
	menuOptions: [],
};

const ScreenHeader = connect(state => {
	return {
		historyCanGoBack: state.historyCanGoBack,
		locale: state.settings.locale,
		folders: state.folders,
		theme: state.settings.theme,
		showAdvancedOptions: state.settings.showAdvancedOptions,
		noteSelectionEnabled: state.noteSelectionEnabled,
		selectedNoteIds: state.selectedNoteIds,
		showMissingMasterKeyMessage: state.notLoadedMasterKeys.length && state.masterKeys.length,
	};
})(ScreenHeaderComponent);

module.exports = { ScreenHeader };