'use strict';
/*eslint-env browser*/
var reactTemplates = require('../src/reactTemplates');
var playgroundTemplate = require('./playground.rt.js');
var pgFiddleTemplate = require('./playground-fiddle.rt.js');

var React = require('react/addons');

var _ = require('lodash');

function emptyFunc() {
    return null;
}

function generateTemplateSource(html) {
    var code = null;
    try {
        code = reactTemplates.convertTemplateToReact(html.trim().replace(/\r/g, ''));
    } catch (e) {
    }
    return code;
}

function generateTemplateFunction(code) {
    try {
        var defineMap = {'react/addons': React, lodash: _};
        var define = function (requirementsNames, content) {
            var requirements = _.map(requirementsNames, function (reqName) {
                return defineMap[reqName];
            });
            return content.apply(this, requirements);
        };
        /*eslint no-eval:0*/
        var res = eval(code);
        return res;
    } catch (e) {
        return emptyFunc;
    }
}

function generateRenderFunc(renderFunc) {
    return function() {
        var res = null;
        try {
            res = renderFunc.apply(this);
        } catch (e) {
            res = React.DOM.div.apply(this, [{style: {color: 'red'}}, 'Exception:' + e.message]);
        }
        return React.DOM.div.apply(this, _.flatten([
            {key: 'result'},
            res
        ]));
    };
}
var z = {getInitialState: function() {return {name: 'reactTemplates'};}};
var templateHTML = '<div>\n' +
    'Have {_.filter(this.state.todos, {done:true}).length} todos done,\n' +
    'and {_.filter(this.state.todos, {done:false}).length} not done\n' +
    '    <br/>\n' +
    '    <div rt-repeat="todo in this.state.todos" key="{todo.key}">\n' +
    '        <button onClick="()=>this.remove(todo)">x</button>\n' +
    '        <input type="checkbox" checked="{todo.done}" onChange="()=>this.toggleChecked(todoIndex)"/>\n' +
    '        <span style="text-decoration: {todo.done ? \'line-through\': \'none\'}">{todo.value}</span>\n' +
    '    </div>\n' +
    '    <input key="myinput" type="text" onKeyDown="(e) => if (e.keyCode == 13) { e.preventDefault(); this.add(); }" valueLink="{this.linkState(\'edited\')}"/>\n' +
    '    <button onClick="()=>this.add()">Add</button><br/>\n' +
    '    <button onClick="()=>this.clearDone()">Clear done</button>\n' +
    '</div>';
var templateProps = "{\n    mixins: [React.addons.LinkedStateMixin],\n    getInitialState: function () {\n        return {edited: '', todos: [], counter: 0};\n    },\n    add: function () {\n    if (this.state.edited.trim().length === 0) {\n        return;\n    }\n        var newTodo = {value: this.state.edited, done: false, key: this.state.counter};\n        this.setState({todos: this.state.todos.concat(newTodo), edited: '', counter: this.state.counter + 1});\n    },\n    remove: function (todo) {\n        this.setState({todos: _.reject(this.state.todos, todo)});\n    },\n    toggleChecked: function (index) {\n        var todos = _.cloneDeep(this.state.todos);\n        todos[index].done = !todos[index].done;\n        this.setState({todos: todos});\n    },\n    clearDone: function () {\n        this.setState({todos: _.filter(this.state.todos, {done: false})});\n    }\n}";

var Playground = React.createClass({

    displayName: 'Playground',
    mixins: [React.addons.LinkedStateMixin],
    propTypes: {
        direction: React.PropTypes.string,
        codeVisible: React.PropTypes.bool,
        fiddle: React.PropTypes.bool
    },
    getDefaultProps: function() {
        return {
            direction: 'horizontal', //vertical
            codeVisible: true,
            fiddle: false
        };
    },
    updateSample: function (state) {
        this.templateSource = generateTemplateSource(state.templateHTML);
        this.sampleFunc = generateTemplateFunction(this.templateSource);
        this.validHTML = this.sampleFunc !== emptyFunc;
        this.sampleRender = generateRenderFunc(this.sampleFunc);
        var classBase = {};
        try {
            this.validProps = true;
            console.log(state.templateProps);
            classBase = eval('(' + state.templateProps + ')');
            if (!_.isObject(classBase)) {
                throw 'failed to eval';
            }
        } catch (e) {
            classBase = {};
            this.validProps = false;
        }
        classBase.render = this.sampleRender;
        this.sample = React.createFactory(React.createClass(classBase));
    },
    getInitialState: function () {
        var currentState = {
            templateHTML: this.props.templateHTML || templateHTML,
            templateProps: this.props.templateProps || templateProps
        };
        this.updateSample(currentState);
        return currentState;
    },
    componentWillUpdate: function (nextProps, nextState) {
        if (nextState.templateHTML !== this.state.templateHTML || nextState.templateProps !== this.state.templateProps) {
            this.updateSample(nextState);
        }
    },

    render: function () {
        var template = this.props.fiddle ? pgFiddleTemplate : playgroundTemplate;
        return template.apply(this);
    }
});

module.exports = Playground;