import React, {PureComponent} from 'react'
import PropTypes from 'prop-types'
import Swipeable from 'react-swipeable'
import {EpubView} from '..'
import defaultStyles from './style'

class TocItem extends PureComponent {
setLocation = () => {
    this.props.setLocation(this.props.href)
}
render () {
    const {label, styles} = this.props
    return (
        <button onClick={this.setLocation} style={styles}>{label}</button>
    )
}
}

TocItem.propTypes = {
    label: PropTypes.string,
    href: PropTypes.string,
    setLocation: PropTypes.func,
    styles: PropTypes.object,
}

class ReactReader extends PureComponent {
    constructor (props) {
        super(props)
        this.state = {
            expanedToc: false,
            toc: false,
        }
    }
toggleToc = () => {
    this.setState({
        expanedToc: !this.state.expanedToc,
    })
}

next = () => {
    this.refs.reader.nextPage()
}

prev = () => {
    this.refs.reader.prevPage()
}

onTocChange = (toc) => {
    const {tocChanged} = this.props
    this.setState({
        toc: toc,
    }, () => tocChanged && tocChanged(toc))
}

renderToc () {
    const {toc} = this.state
    const {styles} = this.props
    return (
        <div style={styles.tocArea}>
            <div style={styles.toc}>
                { // eslint-disable-next-line no-unused-vars
                    toc.map((item, i) =>
                        <TocItem key={item.href} {...item} setLocation={this.setLocation} styles={styles.tocAreaButton} />
                    )}
            </div>
        </div>
    )
}

setLocation = (loc) => {
    const {locationChanged} = this.props
    this.setState({
    }, () => locationChanged && locationChanged(loc))
}

renderTocToggle () {
    const {expanedToc} = this.state
    const {styles} = this.props
    return (
        <button style={Object.assign({}, styles.tocButton, expanedToc ? styles.tocButtonExpaned : {})} onClick={this.toggleToc}>
            <span style={Object.assign({}, styles.tocButtonBar, styles.tocButtonBarTop)} />
            <span style={Object.assign({}, styles.tocButtonBar, styles.tocButtonBottom)} />
        </button>
    )
}

render () {
    const {url, title, showToc, loadingView, epubOptions, styles, getRendition, locationChanged, location, swipeable} = this.props
    const {toc, expanedToc} = this.state
    return (
        <div style={styles.container}>
            <div style={Object.assign({}, styles.readerArea, expanedToc ? styles.containerExpaned : {})}>
                {showToc && this.renderTocToggle()}
                <div style={styles.titleArea}>{title}</div>
                <Swipeable
                    onSwipedRight={this.prev}
                    onSwipedLeft={this.next}
                    trackMouse
                >
                    <div style={styles.reader}>
                        <EpubView
                            ref='reader'
                            url={url}
                            location={location}
                            loadingView={loadingView}
                            tocChanged={this.onTocChange}
                            locationChanged={locationChanged}
                            epubOptions={epubOptions}
                            getRendition={getRendition}
                        />
                        {swipeable && <div style={styles.swipeWrapper} />}
                    </div>
                </Swipeable>
                <button style={Object.assign({}, styles.arrow, styles.prev)} onClick={this.prev}>‹</button>
                <button style={Object.assign({}, styles.arrow, styles.next)} onClick={this.next}>›</button>
            </div>
            {showToc && toc && this.renderToc()}
        </div>
    )
}
}

ReactReader.defaultProps = {
    loadingView: <div style={defaultStyles.loadingView}>Loading…</div>,
    locationChanged: null,
    tocChanged: null,
    showToc: true,
    styles: defaultStyles,
}

ReactReader.propTypes = {
    title: PropTypes.string,
    loadingView: PropTypes.element,
    url: PropTypes.oneOfType([
        PropTypes.string,
        PropTypes.instanceOf(ArrayBuffer),
    ]),
    showToc: PropTypes.bool,
    location: PropTypes.oneOfType([
        PropTypes.string,
        PropTypes.number,
    ]),
    locationChanged: PropTypes.func,
    tocChanged: PropTypes.func,
    styles: PropTypes.object,
    epubOptions: PropTypes.object,
    getRendition: PropTypes.func,
    swipeable: PropTypes.bool,
}

export default ReactReader