Ext.define('Ext.form.field.ComboBox', {
    extend:'Ext.form.field.Picker',
    requires: ['Ext.util.DelayedTask', 'Ext.EventObject', 'Ext.view.BoundList', 'Ext.view.BoundListKeyNav', 'Ext.data.StoreManager'],
    alternateClassName: 'Ext.form.ComboBox',
    alias: ['widget.combobox', 'widget.combo'],
    triggerCls: Ext.baseCSSPrefix + 'form-arrow-trigger',
    multiSelect: false,
    delimiter: ', ',
    displayField: 'text',
    triggerAction: 'all',
    allQuery: '',
    queryParam: 'query',
    queryCaching: true,
    pageSize: 0,
    autoSelect: true,
    typeAhead: false,
    typeAheadDelay: 250,
    selectOnTab: true,
    forceSelection: false,
    defaultListConfig: {
        emptyText: '',
        loadingText: 'Loading...',
        loadingHeight: 70,
        minWidth: 70,
        maxHeight: 300,
        shadow: 'sides'
    },
    ignoreSelection: 0,

    initComponent: function() {
        var me = this,
            isDefined = Ext.isDefined,
            store = me.store,
            transform = me.transform,
            transformSelect, isLocalMode;

       
        if (!store && !transform) {
            Ext.Error.raise('Either a valid store, or a HTML select to transform, must be configured on the combo.');
        }
        if (me.typeAhead && me.multiSelect) {
            Ext.Error.raise('typeAhead and multiSelect are mutually exclusive options -- please remove one of them.');
        }
        if (me.typeAhead && !me.editable) {
            Ext.Error.raise('If typeAhead is enabled the combo must be editable: true -- please change one of those settings.');
        }
        if (me.selectOnFocus && !me.editable) {
            Ext.Error.raise('If selectOnFocus is enabled the combo must be editable: true -- please change one of those settings.');
        }
       

        this.addEvents(
             'beforequery',
	         'select'
        );

       
        if (!store && transform) {
            transformSelect = Ext.getDom(transform);
            if (transformSelect) {
                store = Ext.Array.map(Ext.Array.from(transformSelect.options), function(option) {
                    return [option.value, option.text];
                });
                if (!me.name) {
                    me.name = transformSelect.name;
                }
                if (!('value' in me)) {
                    me.value = transformSelect.value;
                }
            }
        }

        me.bindStore(store, true);
        store = me.store;
        if (store.autoCreated) {
            me.queryMode = 'local';
            me.valueField = me.displayField = 'field1';
            if (!store.expanded) {
                me.displayField = 'field2';
            }
        }


        if (!isDefined(me.valueField)) {
            me.valueField = me.displayField;
        }

        isLocalMode = me.queryMode === 'local';
        if (!isDefined(me.queryDelay)) {
            me.queryDelay = isLocalMode ? 10 : 500;
        }
        if (!isDefined(me.minChars)) {
            me.minChars = isLocalMode ? 0 : 4;
        }

        if (!me.displayTpl) {
            me.displayTpl = Ext.create('Ext.XTemplate',
                '<tpl for=".">' +
                    '{[typeof values === "string" ? values : values.' + me.displayField + ']}' +
                    '<tpl if="xindex < xcount">' + me.delimiter + '</tpl>' +
                '</tpl>'
            );
        } else if (Ext.isString(me.displayTpl)) {
            me.displayTpl = Ext.create('Ext.XTemplate', me.displayTpl);
        }

        me.callParent();

        me.doQueryTask = Ext.create('Ext.util.DelayedTask', me.doRawQuery, me);

        // store has already been loaded, setValue
        if (me.store.getCount() > 0) {
            me.setValue(me.value);
        }

        // render in place of 'transform' select
        if (transformSelect) {
            me.render(transformSelect.parentNode, transformSelect);
            Ext.removeNode(transformSelect);
            delete me.renderTo;
        }
    },

    beforeBlur: function() {
        var me = this;
        me.doQueryTask.cancel();
        if (me.forceSelection) {
            me.assertValue();
        } else {
            me.collapse();
        }
    },

    // private
    assertValue: function() {
        var me = this,
            value = me.getRawValue(),
            rec;
        if (me.multiSelect) {
            if (value !== me.getDisplayValue()) {
                me.setValue(me.lastSelection);
            }
        } else {	
            rec = me.findRecordByDisplay(value);
            if (rec) {
                me.select(rec);
            } else {
				/*=== klio modified === 
				original
				me.setValue(me.lastSelection);
				remet le champ à la selection précédente
				
				quand c'est un remote store, ne pas remttre à 0 le champ quand la valeur n'est pas dans la liste
				*/
				if (me.lastSelection[0] || me.value=="") me.setValue(me.lastSelection);
				else {
					me.setRawValue(me.valueNotFoundText);
					me.setValue(me.originalValue);
				}
				/*=== klio modified === */
              
			   
            }
        }
        me.collapse();
    },

    onTypeAhead: function() {
        var me = this,
            displayField = me.displayField,
            record = me.store.findRecord(displayField, me.getRawValue()),
            boundList = me.getPicker(),
            newValue, len, selStart;

        if (record) {
            newValue = record.get(displayField);
            len = newValue.length;
            selStart = me.getRawValue().length;

            boundList.highlightItem(boundList.getNode(record));

            if (selStart !== 0 && selStart !== len) {
                me.setRawValue(newValue);
                me.selectText(selStart, newValue.length);
            }
        }
    },

    // invoked when a different store is bound to this combo
    // than the original
    resetToDefault: function() {

    },

    bindStore: function(store, initial) {
        var me = this,
            oldStore = me.store;

        // this code directly accesses this.picker, bc invoking getPicker
        // would create it when we may be preping to destroy it
        if (oldStore && !initial) {
            if (oldStore !== store && oldStore.autoDestroy) {
                oldStore.destroy();
            } else {
                oldStore.un({
                    scope: me,
                    load: me.onLoad,
                    exception: me.collapse
                });
            }
            if (!store) {
                me.store = null;
                if (me.picker) {
                    me.picker.bindStore(null);
                }
            }
        }
        if (store) {
            if (!initial) {
                me.resetToDefault();
            }

            me.store = Ext.data.StoreManager.lookup(store);
            me.store.on({
                scope: me,
                load: me.onLoad,
                exception: me.collapse
            });

            if (me.picker) {
                me.picker.bindStore(store);
            }
        }
    },

    onLoad: function() {
        var me = this,
            value = me.value;

        me.syncSelection();
        if (me.picker && !me.picker.getSelectionModel().hasSelection()) {
            me.doAutoSelect();
        }
    },

    /**
     * @private
     * Execute the query with the raw contents within the textfield.
     */
    doRawQuery: function() {
        this.doQuery(this.getRawValue());
    },

    /**
     * Executes a query to filter the dropdown list. Fires the {@link #beforequery} event prior to performing the
     * query allowing the query action to be canceled if needed.
     * @param {String} queryString The SQL query to execute
     * @param {Boolean} forceAll <code>true</code> to force the query to execute even if there are currently fewer
     * characters in the field than the minimum specified by the <code>{@link #minChars}</code> config option.  It
     * also clears any filter previously saved in the current store (defaults to <code>false</code>)
     * @return {Boolean} true if the query was permitted to run, false if it was cancelled by a {@link #beforequery} handler.
     */
    doQuery: function(queryString, forceAll) {
        queryString = queryString || '';

        // store in object and pass by reference in 'beforequery'
        // so that client code can modify values.
        var me = this,
            qe = {
                query: queryString,
                forceAll: forceAll,
                combo: me,
                cancel: false
            },
            store = me.store,
            isLocalMode = me.queryMode === 'local';

        if (me.fireEvent('beforequery', qe) === false || qe.cancel) {
            return false;
        }

        // get back out possibly modified values
        queryString = qe.query;
        forceAll = qe.forceAll;

        // query permitted to run
        if (forceAll || (queryString.length >= me.minChars)) {
            // expand before starting query so LoadMask can position itself correctly
            me.expand();

            // make sure they aren't querying the same thing
            if (!me.queryCaching || me.lastQuery !== queryString) {
                me.lastQuery = queryString;

                if (isLocalMode) {
                    // forceAll means no filtering - show whole dataset.
                    if (forceAll) {
                        store.clearFilter();
                    } else {
                        // Clear filter, but supress event so that the BoundList is not immediately updated.
                        store.clearFilter(true);
                        store.filter(me.displayField, queryString);
                    }
                } else {
                    // In queryMode: 'remote', we assume Store filters are added by the developer as remote filters,
                    // and these are automatically passed as params with every load call, so we do *not* call clearFilter.
                    store.load({
                        params: me.getParams(queryString)
                    });
                }
            }

            // Clear current selection if it does not match the current value in the field
            if (me.getRawValue() !== me.getDisplayValue()) {
                me.ignoreSelection++;
                me.picker.getSelectionModel().deselectAll();
                me.ignoreSelection--;
            }

            if (isLocalMode) {
                me.doAutoSelect();
            }
            if (me.typeAhead) {
                me.doTypeAhead();
            }
        }
        return true;
    },

    // private
    getParams: function(queryString) {
        var p = {},
            pageSize = this.pageSize,
            param = this.queryParam;

        if (param) {
            p[param] = queryString;
        }

        if (pageSize) {
            p.start = 0;
            p.limit = pageSize;
        }
        return p;
    },

    /**
     * @private
     * If the autoSelect config is true, and the picker is open, highlights the first item.
     */
    doAutoSelect: function() {
        var me = this,
            picker = me.picker,
            lastSelected, itemNode;
        if (picker && me.autoSelect && me.store.getCount() > 0) {
            // Highlight the last selected item and scroll it into view
            lastSelected = picker.getSelectionModel().lastSelected;
            itemNode = picker.getNode(lastSelected || 0);
            if (itemNode) {
                picker.highlightItem(itemNode);
                picker.listEl.scrollChildIntoView(itemNode, false);
            }
        }
    },

    doTypeAhead: function() {
        if (!this.typeAheadTask) {
            this.typeAheadTask = Ext.create('Ext.util.DelayedTask', this.onTypeAhead, this);
        }
        if (this.lastKey != Ext.EventObject.BACKSPACE && this.lastKey != Ext.EventObject.DELETE) {
            this.typeAheadTask.delay(this.typeAheadDelay);
        }
    },

    onTriggerClick: function() {
        var me = this;
        if (!me.readOnly && !me.disabled) {
            if (me.isExpanded) {
                me.collapse();
            } else {
                me.onFocus({});
                if (me.triggerAction === 'all') {
                    me.doQuery(me.allQuery, true);
                } else {
                    me.doQuery(me.getRawValue());
                }
            }
            me.inputEl.focus();
        }
    },


    // store the last key and doQuery if relevant
    onKeyUp: function(e, t) {
        var me = this,
            key = e.getKey();

        if (!me.readOnly && !me.disabled && me.editable) {
            me.lastKey = key;
            // we put this in a task so that we can cancel it if a user is
            // in and out before the queryDelay elapses

            // perform query w/ any normal key or backspace or delete
            if (!e.isSpecialKey() || key == e.BACKSPACE || key == e.DELETE) {
                me.doQueryTask.delay(me.queryDelay);
            }
        }

        if (me.enableKeyEvents) {
            me.callParent(arguments);
        }
    },

    initEvents: function() {
        var me = this;
        me.callParent();

        /*
         * Setup keyboard handling. If enableKeyEvents is true, we already have
         * a listener on the inputEl for keyup, so don't create a second.
         */
        if (!me.enableKeyEvents) {
            me.mon(me.inputEl, 'keyup', me.onKeyUp, me);
        }
    },

    createPicker: function() {
        var me = this,
            picker,
            menuCls = Ext.baseCSSPrefix + 'menu',
            opts = Ext.apply({
                selModel: {
                    mode: me.multiSelect ? 'SIMPLE' : 'SINGLE'
                },
                floating: true,
                hidden: true,
                ownerCt: me.ownerCt,
                cls: me.el.up('.' + menuCls) ? menuCls : '',
                store: me.store,
                displayField: me.displayField,
                focusOnToFront: false,
                pageSize: me.pageSize,
                tpl: me.tpl
            }, me.listConfig, me.defaultListConfig);

        picker = me.picker = Ext.create('Ext.view.BoundList', opts);

        me.mon(picker, {
            itemclick: me.onItemClick,
            refresh: me.onListRefresh,
            scope: me
        });

        me.mon(picker.getSelectionModel(), 'selectionchange', me.onListSelectionChange, me);

        return picker;
    },

    onListRefresh: function() {
        this.alignPicker();
        this.syncSelection();
    },

    onItemClick: function(picker, record){
        /*
         * If we're doing single selection, the selection change events won't fire when
         * clicking on the selected element. Detect it here.
         */
        var me = this,
            lastSelection = me.lastSelection,
            valueField = me.valueField,
            selected;

        if (!me.multiSelect && lastSelection) {
            selected = lastSelection[0];
            if (selected && (record.get(valueField) === selected.get(valueField))) {
                me.collapse();
            }
        }
    },

    onListSelectionChange: function(list, selectedRecords) {
        var me = this,
            isMulti = me.multiSelect,
            hasRecords = selectedRecords.length > 0;
        // Only react to selection if it is not called from setValue, and if our list is
        // expanded (ignores changes to the selection model triggered elsewhere)
        if (!me.ignoreSelection && me.isExpanded) {
            if (!isMulti) {
                Ext.defer(me.collapse, 1, me);
            }
            /*
             * Only set the value here if we're in multi selection mode or we have
             * a selection. Otherwise setValue will be called with an empty value
             * which will cause the change event to fire twice.
             */
            if (isMulti || hasRecords) {
                me.setValue(selectedRecords, false);
            }
            if (hasRecords) {
                me.fireEvent('select', me, selectedRecords);
            }
            me.inputEl.focus();
        }
    },

    /**
     * @private
     * Enables the key nav for the BoundList when it is expanded.
     */
    onExpand: function() {
        var me = this,
            keyNav = me.listKeyNav,
            selectOnTab = me.selectOnTab,
            picker = me.getPicker();

        // Handle BoundList navigation from the input field. Insert a tab listener specially to enable selectOnTab.
        if (keyNav) {
            keyNav.enable();
        } else {
            keyNav = me.listKeyNav = Ext.create('Ext.view.BoundListKeyNav', this.inputEl, {
                boundList: picker,
                forceKeyDown: true,
                tab: function(e) {
                    if (selectOnTab) {
                        this.selectHighlighted(e);
                        me.triggerBlur();
                    }
                    // Tab key event is allowed to propagate to field
                    return true;
                }
            });
        }

        // While list is expanded, stop tab monitoring from Ext.form.field.Trigger so it doesn't short-circuit selectOnTab
        if (selectOnTab) {
            me.ignoreMonitorTab = true;
        }

        Ext.defer(keyNav.enable, 1, keyNav); //wait a bit so it doesn't react to the down arrow opening the picker
        me.inputEl.focus();
    },

    /**
     * @private
     * Disables the key nav for the BoundList when it is collapsed.
     */
    onCollapse: function() {
        var me = this,
            keyNav = me.listKeyNav;
        if (keyNav) {
            keyNav.disable();
            me.ignoreMonitorTab = false;
        }
    },

    /**
     * Selects an item by a {@link Ext.data.Model Model}, or by a key value.
     * @param r
     */
    select: function(r) {
        this.setValue(r, true);
    },

    /**
     * Find the record by searching for a specific field/value combination
     * Returns an Ext.data.Record or false
     * @private
     */
    findRecord: function(field, value) {
        var ds = this.store,
            idx = ds.findExact(field, value);
        return idx !== -1 ? ds.getAt(idx) : false;
    },
    findRecordByValue: function(value) {
        return this.findRecord(this.valueField, value);
    },
    findRecordByDisplay: function(value) {
        return this.findRecord(this.displayField, value);
    },

    /**
     * Sets the specified value(s) into the field. For each value, if a record is found in the {@link #store} that
     * matches based on the {@link #valueField}, then that record's {@link #displayField} will be displayed in the
     * field.  If no match is found, and the {@link #valueNotFoundText} config option is defined, then that will be
     * displayed as the default field text. Otherwise a blank value will be shown, although the value will still be set.
     * @param {String|Array} value The value(s) to be set. Can be either a single String or {@link Ext.data.Model},
     * or an Array of Strings or Models.
     * @return {Ext.form.field.Field} this
     */
    setValue: function(value, doSelect) {
        var me = this,
            valueNotFoundText = me.valueNotFoundText,
            inputEl = me.inputEl,
            i, len, record,
            models = [],
            displayTplData = [],
            processedValue = [];

        if (me.store.loading) {
            // Called while the Store is loading. Ensure it is processed by the onLoad method.
            me.value = value;
            return me;
        }

        // This method processes multi-values, so ensure value is an array.
        value = Ext.Array.from(value);

        // Loop through values
        for (i = 0, len = value.length; i < len; i++) {
            record = value[i];
            if (!record || !record.isModel) {
                record = me.findRecordByValue(record);
            }
            // record found, select it.
            if (record) {
                models.push(record);
                displayTplData.push(record.data);
                processedValue.push(record.get(me.valueField));
            }
            // record was not found, this could happen because
            // store is not loaded or they set a value not in the store
            else {
                // if valueNotFoundText is defined, display it, otherwise display nothing for this value
                if (Ext.isDefined(valueNotFoundText)) {
                    displayTplData.push(valueNotFoundText);
                }
                processedValue.push(value[i]);
            }
        }

        // Set the value of this field. If we are multiselecting, then that is an array.
        me.value = me.multiSelect ? processedValue : processedValue[0];
        if (!Ext.isDefined(me.value)) {
            me.value = null;
        }
        me.displayTplData = displayTplData; //store for getDisplayValue method
        me.lastSelection = me.valueModels = models;

        if (inputEl && me.emptyText && !Ext.isEmpty(value)) {
            inputEl.removeCls(me.emptyCls);
        }

        // Calculate raw value from the collection of Model data
        me.setRawValue(me.getDisplayValue());
        me.checkChange();

        if (doSelect !== false) {
            me.syncSelection();
        }
        me.applyEmptyText();

        return me;
    },

    /**
     * @private Generate the string value to be displayed in the text field for the currently stored value
     */
    getDisplayValue: function() {
        return this.displayTpl.apply(this.displayTplData);
    },

    getValue: function() {
        // If the user has not changed the raw field value since a value was selected from the list,
        // then return the structured value from the selection. If the raw field value is different
        // than what would be displayed due to selection, return that raw value.
        var me = this,
            picker = me.picker,
            rawValue = me.getRawValue(), //current value of text field
            value = me.value; //stored value from last selection or setValue() call

        if (me.getDisplayValue() !== rawValue) {
            value = rawValue;
            me.value = me.displayTplData = me.valueModels = null;
            if (picker) {
                me.ignoreSelection++;
                picker.getSelectionModel().deselectAll();
                me.ignoreSelection--;
            }
        }

        return value;
    },

    getSubmitValue: function() {
        return this.getValue();
    },

    isEqual: function(v1, v2) {
        var fromArray = Ext.Array.from,
            i, len;

        v1 = fromArray(v1);
        v2 = fromArray(v2);
        len = v1.length;

        if (len !== v2.length) {
            return false;
        }

        for(i = 0; i < len; i++) {
            if (v2[i] !== v1[i]) {
                return false;
            }
        }

        return true;
    },

    /**
     * Clears any value currently set in the ComboBox.
     */
    clearValue: function() {
        this.setValue([]);
    },

    /**
     * @private Synchronizes the selection in the picker to match the current value of the combobox.
     */
    syncSelection: function() {
        var me = this,
            ExtArray = Ext.Array,
            picker = me.picker,
            selection, selModel;
        if (picker) {
            // From the value, find the Models that are in the store's current data
            selection = [];
            ExtArray.forEach(me.valueModels || [], function(value) {
                if (value && value.isModel && me.store.indexOf(value) >= 0) {
                    selection.push(value);
                }
            });

            // Update the selection to match
            me.ignoreSelection++;
            selModel = picker.getSelectionModel();
            selModel.deselectAll();
            if (selection.length) {
                selModel.select(selection);
            }
            me.ignoreSelection--;
        }
    }
});