const React = require('react');
const { connect } = require('react-redux');
const { reg } = require('lib/registry.js');
const Setting = require('lib/models/Setting.js');
const { bridge } = require('electron').remote.require('./bridge');
const { Header } = require('./Header.min.js');
const { themeStyle } = require('../theme.js');
const pathUtils = require('lib/path-utils.js');
const { _ } = require('lib/locale.js');
const { commandArgumentsToString } = require('lib/string-utils');
const SyncTargetRegistry = require('lib/SyncTargetRegistry');
const shared = require('lib/components/shared/config-shared.js');

class ConfigScreenComponent extends React.Component {

	constructor() {
		super();

		shared.init(this);

		this.checkSyncConfig_ = async () => {
			await shared.checkSyncConfig(this, this.state.settings);
		}

		this.rowStyle_ = {
			marginBottom: 10,
		};
	}

	componentWillMount() {
		this.setState({ settings: this.props.settings });
	}

	keyValueToArray(kv) {
		let output = [];
		for (let k in kv) {
			if (!kv.hasOwnProperty(k)) continue;
			output.push({
				key: k,
				label: kv[k],
			});
		}

		return output;
	}

	sectionToComponent(key, section, settings) {
		const theme = themeStyle(this.props.theme);
		const settingComps = [];

		for (let i = 0; i < section.metadatas.length; i++) {
			const md = section.metadatas[i];

			const settingComp = this.settingToComponent(md.key, settings[md.key]);
			settingComps.push(settingComp);
		}

		const sectionStyle = {
			marginBottom: 20,
		};

		const headerStyle = Object.assign({}, theme.headerStyle, {
			borderBottomWidth: 1,
			borderBottomColor: theme.dividerColor,
			borderBottomStyle: 'solid',
			paddingBottom: '.4em',
		});

		if (section.name === 'general') {
			sectionStyle.borderTopWidth = 0;
		}

		const noteComp = section.name !== 'general' ? null : (
			<div style={Object.assign({}, theme.textStyle, {marginBottom: 10})}>
				{_('Notes and settings are stored in: %s', pathUtils.toSystemSlashes(Setting.value('profileDir'), process.platform))}
			</div>
		);

		return (
			<div key={key} style={sectionStyle}>
				<h2 style={headerStyle}>{Setting.sectionNameToLabel(section.name)}</h2>
				{noteComp}
				<div>
					{settingComps}
				</div>
			</div>
		);
	}

	settingToComponent(key, value) {
		const theme = themeStyle(this.props.theme);

		let output = null;

		const rowStyle = this.rowStyle_;

		const labelStyle = Object.assign({}, theme.textStyle, {
			display: 'inline-block',
			marginRight: 10,
			color: theme.color,
		});

		const subLabel = Object.assign({}, labelStyle, {
			opacity: 0.7,
			marginBottom: Math.round(rowStyle.marginBottom * 0.7),
		});

		const invisibleLabel = Object.assign({}, labelStyle, {
			opacity: 0,
		});

		const controlStyle = {
			display: 'inline-block',
			color: theme.color,
			backgroundColor: theme.backgroundColor,
		};

		const descriptionStyle = Object.assign({}, theme.textStyle, {
			color: theme.colorFaded,
			marginTop: 5,
			fontStyle: 'italic',
			maxWidth: '70em',
		});

		const updateSettingValue = (key, value) => {
			// console.info(key + ' = ' + value);
			return shared.updateSettingValue(this, key, value);
		}

		// Component key needs to be key+value otherwise it doesn't update when the settings change.

		const md = Setting.settingMetadata(key);

		const descriptionText = Setting.keyDescription(key, 'desktop');
		const descriptionComp = descriptionText ? (
			<div style={descriptionStyle}>
				{descriptionText}
			</div>
		) : null;

		if (md.isEnum) {
			let items = [];
			const settingOptions = md.options();
			let array = this.keyValueToArray(settingOptions);
			for (let i = 0; i < array.length; i++) {
				const e = array[i];
				items.push(<option value={e.key.toString()} key={e.key}>{settingOptions[e.key]}</option>);
			}

			return (
				<div key={key} style={rowStyle}>
					<div style={labelStyle}><label>{md.label()}</label></div>
					<select value={value} style={controlStyle} onChange={(event) => { updateSettingValue(key, event.target.value) }}>
						{items}
					</select>
					{ descriptionComp }
				</div>
			);
		} else if (md.type === Setting.TYPE_BOOL) {
			const onCheckboxClick = (event) => {
				updateSettingValue(key, !value)
			}

			// Hack: The {key+value.toString()} is needed as otherwise the checkbox doesn't update when the state changes.
			// There's probably a better way to do this but can't figure it out.

			return (
				<div key={key+value.toString()} style={rowStyle}>
					<div style={controlStyle}>
						<input id={'setting_checkbox_' + key} type="checkbox" checked={!!value} onChange={(event) => { onCheckboxClick(event) }}/><label onClick={(event) => { onCheckboxClick(event) }} style={labelStyle} htmlFor={'setting_checkbox_' + key}>{md.label()}</label>						
						{ descriptionComp }
					</div>
				</div>
			);
		} else if (md.type === Setting.TYPE_STRING) {
			const inputStyle = Object.assign({}, controlStyle, {
				width: '50%',
				minWidth: '20em',
				border: '1px solid' });
			const inputType = md.secure === true ? 'password' : 'text';

			if (md.subType === 'file_path_and_args') {
				inputStyle.marginBottom = subLabel.marginBottom;

				const splitCmd = cmdString => {
					const path = pathUtils.extractExecutablePath(cmdString);
					const args = cmdString.substr(path.length + 1);
					return [pathUtils.unquotePath(path), args];
				}

				const joinCmd = cmdArray => {
					if (!cmdArray[0] && !cmdArray[1]) return '';
					let cmdString = pathUtils.quotePath(cmdArray[0]);
					if (!cmdString) cmdString = '""';
					if (cmdArray[1]) cmdString += ' ' + cmdArray[1];
					return cmdString;
				}

				const onPathChange = event => {
					const cmd = splitCmd(this.state.settings[key]);
					cmd[0] = event.target.value;
					updateSettingValue(key, joinCmd(cmd));
				}

				const onArgsChange = event => {
					const cmd = splitCmd(this.state.settings[key]);
					cmd[1] = event.target.value;
					updateSettingValue(key, joinCmd(cmd));
				}

				const browseButtonClick = () => {
					const paths = bridge().showOpenDialog();
					if (!paths || !paths.length) return;
					const cmd = splitCmd(this.state.settings[key]);
					cmd[0] = paths[0]
					updateSettingValue(key, joinCmd(cmd));
				}

				const cmd = splitCmd(this.state.settings[key]);

				return (
					<div key={key} style={rowStyle}>
						<div style={{display:'flex'}}>
							<div style={{flex:0, whiteSpace: 'nowrap'}}>
								<div style={labelStyle}><label>{md.label()}</label></div>
							</div>
							<div style={{flex:0}}>
								<div style={subLabel}>Path:</div>
								<div style={subLabel}>Arguments:</div>
							</div>
							<div style={{flex:1}}>
								<div style={{display: 'flex', flexDirection: 'row', alignItems: 'center', marginBottom: inputStyle.marginBottom}}>
									<input type={inputType} style={Object.assign({}, inputStyle, {marginBottom:0})} onChange={(event) => {onPathChange(event)}} value={cmd[0]} />
									<button onClick={browseButtonClick} style={Object.assign({}, theme.buttonStyle, { marginLeft: 5, minHeight: 20, height: 20 })}>{_('Browse...')}</button>
								</div>
								<input type={inputType} style={inputStyle} onChange={(event) => {onArgsChange(event)}} value={cmd[1]}/>
							</div>
						</div>

						<div style={{display:'flex'}}>
							<div style={{flex:0, whiteSpace: 'nowrap'}}>
								<div style={invisibleLabel}><label>{md.label()}</label></div>
							</div>
							<div style={{flex:1}}>
								{ descriptionComp }
							</div>
						</div>
					</div>
				);
			} else {
				const onTextChange = (event) => {
					updateSettingValue(key, event.target.value);
				}

				return (
					<div key={key} style={rowStyle}>
						<div style={labelStyle}><label>{md.label()}</label></div>
						<input type={inputType} style={inputStyle} value={this.state.settings[key]} onChange={(event) => {onTextChange(event)}} />
						{ descriptionComp }
					</div>
				);
			}
		} else if (md.type === Setting.TYPE_INT) {
			const onNumChange = (event) => {
				updateSettingValue(key, event.target.value);
			};

			return (
				<div key={key} style={rowStyle}>
					<div style={labelStyle}><label>{md.label()}</label></div>
					<input type="number" style={controlStyle} value={this.state.settings[key]} onChange={(event) => {onNumChange(event)}} min={md.minimum} max={md.maximum} step={md.step}/>
					{ descriptionComp }
				</div>
			);
		} else {
			console.warn('Type not implemented: ' + key);
		}

		return output;
	}

	onApplyClick() {
		shared.saveSettings(this);
	}

	onSaveClick() {
		shared.saveSettings(this);
		this.props.dispatch({ type: 'NAV_BACK' });
	}

	onCancelClick() {
		this.props.dispatch({ type: 'NAV_BACK' });
	}

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

		const style = Object.assign({
			backgroundColor: theme.backgroundColor
		}, this.props.style, {
			overflow: 'hidden',
			display: 'flex',
			flexDirection: 'column',
		});

		let settings = this.state.settings;

		const containerStyle = Object.assign({}, theme.containerStyle, { padding: 10, paddingTop: 0 });

		const hasChanges = !!this.state.changedSettingKeys.length;

		const buttonStyle = Object.assign({}, theme.buttonStyle, {
			display: 'inline-block',
			marginRight: 10,
		});

		const buttonStyleApprove = Object.assign({}, buttonStyle, {
			opacity: hasChanges ? 1 : theme.disabledOpacity,
		});

		const settingComps = shared.settingsToComponents2(this, 'desktop', settings);

		const syncTargetMd = SyncTargetRegistry.idToMetadata(settings['sync.target']);

		if (syncTargetMd.supportsConfigCheck) {
			const messages = shared.checkSyncConfigMessages(this);
			const statusStyle = Object.assign({}, theme.textStyle, { marginTop: 10 });
			const statusComp = !messages.length ? null : (
				<div style={statusStyle}>
					{messages[0]}
					{messages.length >= 1 ? (<p>{messages[1]}</p>) : null}
				</div>);

			settingComps.push(
				<div key="check_sync_config_button" style={this.rowStyle_}>
					<button disabled={this.state.checkSyncConfigResult === 'checking'} style={buttonStyle} onClick={this.checkSyncConfig_}>{_('Check synchronisation configuration')}</button>
					{ statusComp }
				</div>);
		}

		const buttonBarStyle = {
			display: 'flex',
			alignItems: 'center',
			padding: 15,
			borderBottomWidth: 1,
			borderBottomStyle: 'solid',
			borderBottomColor: theme.dividerColor,
		};

		return (
			<div style={style}>
				<div style={buttonBarStyle}>
					<button onClick={() => {this.onCancelClick()}} style={buttonStyle}>{'⬅ ' + _('Cancel')}</button>
					<button disabled={!hasChanges} onClick={() => {this.onSaveClick()}} style={buttonStyleApprove}>{_('OK')}</button>
					<button disabled={!hasChanges} onClick={() => {this.onApplyClick()}} style={buttonStyleApprove}>{_('Apply')}</button>
				</div>
				<div style={containerStyle}>
					{ settingComps }
				</div>
			</div>
		);
	}

}

const mapStateToProps = (state) => {
	return {
		theme: state.settings.theme,
		settings: state.settings,
		locale: state.settings.locale,
	};
};

const ConfigScreen = connect(mapStateToProps)(ConfigScreenComponent);

module.exports = { ConfigScreen };