/** @jsx React.DOM */

'use strict';

var React = require('react');


var ContentEditableLabel = React.createClass({
    propTypes: {
        tag: React.PropTypes.func,
        className: React.PropTypes.string,
        onChange: React.PropTypes.func,
        onComplete: React.PropTypes.func,
        initialText: React.PropTypes.string,
        autofocus: React.PropTypes.bool
    },
    getDefaultProps: function() {
        return {
            autofocus: true,
            tag: React.DOM.span
        };
    },
    componentDidMount:function() {
        if(this.props.autofocus) {
            this.clearAndFocus();
        }
        this.cancelled = false;
    },
    shouldComponentUpdate: function(nextProps){
        return nextProps.initialText !== this.getText();
    },
    clearAndFocus: function() {
        var elem = this.refs.element.getDOMNode();
        elem.focus();
        elem.textContent = '';
    },
    getText: function() {
        if(this.cancelled) return '';
        return this.refs.element.getDOMNode().textContent;
    },
    handleClick: function() {
        if(!this.props.autofocus) {
            this.clearAndFocus();
        }
    },
    handleChange: function(){
        var text = this.getText();
        if(this.props.onChange && text !== this.previousText) {
            this.props.onChange(text);
        }
        this.previousText = text;
    },
    handleKeyUp: function(e) {
        if(e.which === 13 || e.which === 27) {
            this.cancelled = (e.which === 27);
            this.refs.element.getDOMNode().blur();
        }
    },
    handleBlur: function() {
        this.props.onComplete(this.getText());
        this.cancelled = false;
    },
    render: function(){
        return (this.props.tag({
            ref: 'element',
            className: this.props.className,
            onClick: this.handleClick,
            onInput: this.handleChange,
            onKeyUp:  this.handleKeyUp,
            onBlur: this.handleBlur,
            contentEditable: 'true'
        }, this.props.initialText));
    }
});

module.exports = ContentEditableLabel;