/** @module collection */
kit.PluginManager.register('collection',function(module, exports, require, global) {

    function valueEx(value, item, key, arr) {
        if(typeof value === 'function') {
            return value(item, key, arr);
        }
        return value;
    }
    function uniqueId (length = 32, firstLetter = true) {
        var idStr = '';
        if(length < 1) return idStr;
        if(firstLetter) {
            length && (idStr = (Math.floor((Math.random() * 25)) + 10).toString(36));
            if (length === 1) return idStr;
        }
        do {
            idStr += (Math.floor((Math.random() * 35))).toString(36);
        } while (idStr.length < length);
        return (idStr);
    }
    function empty(val){
        return arguments.length === 0 ||
            val === undefined ||
            val === null ||
            Number.isNaN(val) === true ||
            val === '' ||
            val === 0 ||
            val === false;
    }
    function filter(value, key, arr) {
        return !empty(value);
    }
    function getSimilarInstance(type) {
        if(type === 'object') {
            return new Collection({});
        }
        return new Collection([]);
    }
    /**
     * @memberof kitCore
     * @instance
     */
    var Collection = function (data) {
        this.data = data;
        if(data instanceof NodeList) {
            this.type = 'NodeList';
        }
        else if(Array.isArray(data)) {
            this.type = 'Array';
        }
        else if(typeof data === 'object') {
            this.type = 'object';
        }
        else {
            this.type = 'Array';
            this.data = [data];
            this.type = undefined;
            console.warn('collection: not support data' + typeof data);
        }
    };

    Collection.prototype.all = function () {
        return this.data;
    };
    /**
     * @param key
     * @param value
     * @return {kitCore.Collection}
     */
    Collection.prototype.set = Collection.prototype.put = function (key, value) {
        this.data[key] = value;
        return this;
    };
    /**
     * @param value
     * @return {kitCore.Collection}
     */
    Collection.prototype.push = function (value) {
        if(this.type === 'Array') {
            this.data.push(value);
            return this;
        }
        this.data[uniqueId(8)] = value;
        return this;
    };
    Collection.prototype.get = function (key, defValue = undefined) {
        if(this.data.hasOwnProperty(key)) {
            return this.data[key];
        }
        return valueEx(defValue, this.data[key], key);
    };
    Collection.prototype.has = function (key) {
        return this.data.hasOwnProperty(key);
    };
    Collection.prototype.count = function () {
        return Object.keys(this.data).length;
    };
    Collection.prototype.isEmpty = function () {
        return this.count() === 0;
    };
    /**
     * @param callback
     * @return {kitCore.Collection}
     */
    Collection.prototype.map = function (callback) {
        var res = getSimilarInstance(this.type);
        for (var key of Object.keys(this.data)) {
            res.put(key, valueEx(callback, this.data[key], key, this.data));
        }
        return res;
    };
    /**
     * @param callback
     * @return {kitCore.Collection}
     */
    Collection.prototype.each = function (callback = true) {
        var BreakException = {}, keys, i, key;
        try {
            keys = Object.keys(this.data);
            if(keys.length)
                for (i = 0; i < keys.length; i++) {
                    key = keys[i];
                    if(valueEx(callback, this.data[key], key, this.data) === false) {
                        throw BreakException;
                    }
                }
        } catch (e) {
            if (e !== BreakException) throw e;
        }
        return this;
    };
    /**
     * @param callback
     * @return {kitCore.Collection}
     */
    Collection.prototype.eachReverse = function (callback = true) {
        var BreakException = {}, keys, i, key;
        try {
            keys = Object.keys(this.data);
            if(keys.length)
                for (i = keys.length - 1; i >= 0; i--) {
                    key = keys[i];
                    if(valueEx(callback, this.data[key], key, this.data) === false) {
                        throw BreakException;
                    }
                }
        } catch (e) {
            if (e !== BreakException) throw e;
        }
        return this;
    };
    /**
     * @param callback
     * @return {kitCore.Collection}
     */
    Collection.prototype.filter = function (callback = filter) {
        var res = getSimilarInstance(this.type);
        this.each(function (value, key, arr) {
            if(valueEx(callback, value, key, arr)) {
                res.put(key, value);
            }
        });
        return res;
    };
    Collection.prototype.every = function (callback) {
        var res = true;
        this.each(function (value, key, arr) {
            res = res && !!valueEx(callback, value, key, arr);
        });
        return res;
    };
    Collection.prototype.first = function (callback = true) {
        var res = undefined;
        this.each(function (value, key, arr) {
            if(valueEx(callback, value, key, arr)) {
                res = value;
                return false;
            }
        });
        return res;
    };
    Collection.prototype.last = function (callback = true) {
        var res = undefined;
        this.eachReverse(function (value, key, arr) {
            if(valueEx(callback, value, key, arr)) {
                res = value;
                return false;
            }
        });
        return res;
    };
    /**
     * @return {kitCore.Collection}
     */
    Collection.prototype.keys = function () {
        return new Collection(Object.keys(this.data));
    };
    /**
     * @return {kitCore.Collection}
     */
    Collection.prototype.dump = Collection.prototype.dd = function () {
        console.log('Collection', this.data);
        return this;
    };

    return module.exports = Collection;
});