/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * @constructor
 * @extends {WebInspector.Object}
 */
WebInspector.FilterBar = function()
{
    this._filtersShown = false;
    this._element = document.createElement("div");
    this._element.className = "hbox";

    this._filterButton = new WebInspector.StatusBarButton(WebInspector.UIString("Filter"), "filters-toggle", 3);
    this._filterButton.element.addEventListener("click", this._handleFilterButtonClick.bind(this), false);

    this._filters = [];
}

WebInspector.FilterBar.Events = {
    FiltersToggled: "FiltersToggled"
}

WebInspector.FilterBar.FilterBarState = {
    Inactive : "inactive",
    Active : "active",
    Shown : "shown"
};

WebInspector.FilterBar.prototype = {
    /**
     * @return {!WebInspector.StatusBarButton}
     */
    filterButton: function()
    {
        return this._filterButton;
    },

    /**
     * @return {!Element}
     */
    filtersElement: function()
    {
        return this._element;
    },

    /**
     * @return {boolean}
     */
    filtersToggled: function()
    {
        return this._filtersShown;
    },

    /**
     * @param {!WebInspector.FilterUI} filter
     */
    addFilter: function(filter)
    {
        this._filters.push(filter);
        this._element.appendChild(filter.element());
        filter.addEventListener(WebInspector.FilterUI.Events.FilterChanged, this._filterChanged, this);
        this._updateFilterButton();
    },

    /**
     * @param {!WebInspector.Event} event
     */
    _filterChanged: function(event)
    {
        this._updateFilterButton();
    },

    /**
     * @return {string}
     */
    _filterBarState: function()
    {
        if (this._filtersShown)
            return WebInspector.FilterBar.FilterBarState.Shown;
        var isActive = false;
        for (var i = 0; i < this._filters.length; ++i) {
            if (this._filters[i].isActive())
                return WebInspector.FilterBar.FilterBarState.Active;
        }
        return WebInspector.FilterBar.FilterBarState.Inactive;
    },

    _updateFilterButton: function()
    {
        this._filterButton.state = this._filterBarState();
    },

    /**
     * @param {?Event} event
     */
    _handleFilterButtonClick: function(event)
    {
        this._filtersShown = !this._filtersShown;
        this._updateFilterButton();
        this.dispatchEventToListeners(WebInspector.FilterBar.Events.FiltersToggled, this._filtersShown);
        if (this._filtersShown) {
            for (var i = 0; i < this._filters.length; ++i) {
                if (this._filters[i] instanceof WebInspector.TextFilterUI) {
                    var textFilterUI = /** @type {!WebInspector.TextFilterUI} */ (this._filters[i]);
                    textFilterUI.focus();
                }
            }
        }
    },

    clear: function()
    {
        this._element.removeChildren();
        this._filters = [];
        this._updateFilterButton();
    },

    __proto__: WebInspector.Object.prototype
}

/**
 * @interface
 * @extends {WebInspector.EventTarget}
 */
WebInspector.FilterUI = function()
{
}

WebInspector.FilterUI.Events = {
    FilterChanged: "FilterChanged"
}

WebInspector.FilterUI.prototype = {
    /**
     * @return {boolean}
     */
    isActive: function() { },

    /**
     * @return {!Element}
     */
    element: function() { }
}

/**
 * @constructor
 * @extends {WebInspector.Object}
 * @implements {WebInspector.FilterUI}
 * @implements {WebInspector.SuggestBoxDelegate}
 * @param {boolean=} supportRegex
 */
WebInspector.TextFilterUI = function(supportRegex)
{
    this._supportRegex = !!supportRegex;
    this._regex = null;

    this._filterElement = document.createElement("div");
    this._filterElement.className = "filter-text-filter";

    this._filterInputElement = this._filterElement.createChild("input", "search-replace toolbar-replace-control");
    this._filterInputElement.placeholder = WebInspector.UIString("Filter");
    this._filterInputElement.id = "filter-input-field";
    this._filterInputElement.addEventListener("mousedown", this._onFilterFieldManualFocus.bind(this), false); // when the search field is manually selected
    this._filterInputElement.addEventListener("input", this._onInput.bind(this), false);
    this._filterInputElement.addEventListener("change", this._onInput.bind(this), false);
    this._filterInputElement.addEventListener("keydown", this._onInputKeyDown.bind(this), true);
    this._filterInputElement.addEventListener("blur", this._onBlur.bind(this), true);

    /** @type {?WebInspector.TextFilterUI.SuggestionBuilder} */
    this._suggestionBuilder = null;

    this._suggestBox = new WebInspector.SuggestBox(this, this._filterElement);

    if (this._supportRegex) {
        this._filterElement.classList.add("supports-regex");
        this._regexCheckBox = this._filterElement.createChild("input");
        this._regexCheckBox.type = "checkbox";
        this._regexCheckBox.id = "text-filter-regex";
        this._regexCheckBox.addEventListener("change", this._onInput.bind(this), false);

        this._regexLabel = this._filterElement.createChild("label");
        this._regexLabel.htmlFor = "text-filter-regex";
        this._regexLabel.textContent = WebInspector.UIString("Regex");
    }
}

WebInspector.TextFilterUI.prototype = {
    /**
     * @return {boolean}
     */
    isActive: function()
    {
        return !!this._filterInputElement.value;
    },

    /**
     * @return {!Element}
     */
    element: function()
    {
        return this._filterElement;
    },

    /**
     * @return {string}
     */
    value: function()
    {
        return this._filterInputElement.value;
    },

    /**
     * @param {string} value
     */
    setValue: function(value)
    {
        this._filterInputElement.value = value;
        this._valueChanged(false);
    },

    /**
     * @return {?RegExp}
     */
    regex: function()
    {
        return this._regex;
    },

    /**
     * @param {?Event} event
     */
    _onFilterFieldManualFocus: function(event)
    {
        WebInspector.setCurrentFocusElement(event.target);
    },

    /**
     * @param {?Event} event
     */
    _onBlur: function(event)
    {
        this._suggestBox.hide();
    },

    /**
     * @param {!WebInspector.Event} event
     */
    _onInput: function(event)
    {
        this._valueChanged(true);
    },

    focus: function()
    {
        this._filterInputElement.focus();
    },

    /**
     * @param {?WebInspector.TextFilterUI.SuggestionBuilder} suggestionBuilder
     */
    setSuggestionBuilder: function(suggestionBuilder)
    {
        this._suggestionBuilder = suggestionBuilder;
        if (document.activeElement === this._filterInputElement)
            this._updateSuggestions();
    },

    _updateSuggestions: function()
    {
        if (!this._suggestionBuilder) {
            this._suggestBox.hide();
            return;
        }
        var suggestions = this._suggestionBuilder.buildSuggestions(this._filterInputElement);
        if (suggestions && suggestions.length) {
            if (this._suppressSuggestion)
                delete this._suppressSuggestion;
            else
                this._suggestionBuilder.applySuggestion(this._filterInputElement, suggestions[0], true);
            this._suggestBox.updateSuggestions(null, suggestions, 0, true, "");
        } else {
            this._suggestBox.hide();
        }
    },

    /**
     * @param {boolean} showSuggestions
     */
    _valueChanged: function(showSuggestions)
    {
        if (showSuggestions)
            this._updateSuggestions();
        else
            this._suggestBox.hide();

        var filterQuery = this.value();

        this._regex = null;
        this._filterInputElement.classList.remove("filter-text-invalid");
        if (filterQuery) {
            if (this._supportRegex && this._regexCheckBox.checked) {
                try {
                    this._regex = new RegExp(filterQuery, "i");
                } catch (e) {
                    this._filterInputElement.classList.add("filter-text-invalid");
                }
            } else {
                this._regex = createPlainTextSearchRegex(filterQuery, "i");
            }
        }

        this._dispatchFilterChanged();
    },

    _dispatchFilterChanged: function()
    {
        this.dispatchEventToListeners(WebInspector.FilterUI.Events.FilterChanged, null);
    },

    /**
     * @param {!KeyboardEvent} event
     * @return {boolean}
     */
    _onInputKeyDown: function(event)
    {
        var handled = false;
        if (event.keyIdentifier === "U+0008") { // Backspace
            this._suppressSuggestion = true;
        } else if (this._suggestBox.visible()) {
            if (event.keyIdentifier === "U+001B") { // Esc
                this._suggestBox.hide();
                handled = true;
            } else if (event.keyIdentifier === "U+0009") { // Tab
                this._suggestBox.acceptSuggestion();
                handled = true;
            } else {
                handled = this._suggestBox.keyPressed(event);
            }
        }
        if (handled)
            event.consume(true);
        return handled;
    },

    /**
     * @override
     * @param {string} suggestion
     * @param {boolean=} isIntermediateSuggestion
     */
    applySuggestion: function(suggestion, isIntermediateSuggestion)
    {
        if (!this._suggestionBuilder)
            return;
        this._suggestionBuilder.applySuggestion(this._filterInputElement, suggestion, !!isIntermediateSuggestion);
        if (isIntermediateSuggestion)
            this._dispatchFilterChanged();
    },

    /** @override */
    acceptSuggestion: function()
    {
        this._filterInputElement.scrollLeft = this._filterInputElement.scrollWidth;
        this._valueChanged(true);
    },

    __proto__: WebInspector.Object.prototype
}

/**
 * @interface
 */
WebInspector.TextFilterUI.SuggestionBuilder = function()
{
}

WebInspector.TextFilterUI.SuggestionBuilder.prototype = {
    /**
     * @param {!HTMLInputElement} input
     * @return {?Array.<string>}
     */
    buildSuggestions: function(input) { },

    /**
     * @param {!HTMLInputElement} input
     * @param {string} suggestion
     * @param {boolean} isIntermediate
     */
    applySuggestion: function(input, suggestion, isIntermediate) { },
}

/**
 * @constructor
 * @implements {WebInspector.FilterUI}
 * @extends {WebInspector.Object}
 */
WebInspector.NamedBitSetFilterUI = function()
{
    this._filtersElement = document.createElement("div");
    this._filtersElement.className = "filter-bitset-filter status-bar-item";
    this._filtersElement.title = WebInspector.UIString("Use %s Click to select multiple types.", WebInspector.KeyboardShortcut.shortcutToString("", WebInspector.KeyboardShortcut.Modifiers.CtrlOrMeta));

    this._allowedTypes = {};
    this._typeFilterElements = {};
    this.addBit(WebInspector.NamedBitSetFilterUI.ALL_TYPES, WebInspector.UIString("All"));
    this._filtersElement.createChild("div", "filter-bitset-filter-divider");
    this._toggleTypeFilter(WebInspector.NamedBitSetFilterUI.ALL_TYPES, false);
}

WebInspector.NamedBitSetFilterUI.ALL_TYPES = "all";

WebInspector.NamedBitSetFilterUI.prototype = {
    /**
     * @return {boolean}
     */
    isActive: function()
    {
        return !this._allowedTypes[WebInspector.NamedBitSetFilterUI.ALL_TYPES];
    },

    /**
     * @param {!WebInspector.Setting} setting
     */
    bindSetting: function(setting)
    {
        console.assert(!this._setting);
        this._setting = setting;
        setting.addChangeListener(this._settingChanged.bind(this));
        this._settingChanged();
    },

    /**
     * @return {!Element}
     */
    element: function()
    {
        return this._filtersElement;
    },

    /**
     * @param {string} typeName
     * @return {boolean}
     */
    accept: function(typeName)
    {
        return !!this._allowedTypes[WebInspector.NamedBitSetFilterUI.ALL_TYPES] || !!this._allowedTypes[typeName];
    },

    _settingChanged: function()
    {
        var allowedTypes = this._setting.get();
        this._allowedTypes = {};
        for (var typeName in this._typeFilterElements) {
            if (allowedTypes[typeName])
                this._allowedTypes[typeName] = true;
        }
        this._update();
    },

    _update: function()
    {
        if ((Object.keys(this._allowedTypes).length === 0) || this._allowedTypes[WebInspector.NamedBitSetFilterUI.ALL_TYPES]) {
            this._allowedTypes = {};
            this._allowedTypes[WebInspector.NamedBitSetFilterUI.ALL_TYPES] = true;
        }
        for (var typeName in this._typeFilterElements)
            this._typeFilterElements[typeName].classList.toggle("selected", this._allowedTypes[typeName]);
        this.dispatchEventToListeners(WebInspector.FilterUI.Events.FilterChanged, null);
    },

    /**
     * @param {string} name
     * @param {string} label
     */
    addBit: function(name, label)
    {
        var typeFilterElement = this._filtersElement.createChild("li", name);
        typeFilterElement.typeName = name;
        typeFilterElement.createTextChild(label);
        typeFilterElement.addEventListener("click", this._onTypeFilterClicked.bind(this), false);
        this._typeFilterElements[name] = typeFilterElement;
    },

    /**
     * @param {!Event} e
     */
    _onTypeFilterClicked: function(e)
    {
        var toggle;
        if (WebInspector.isMac())
            toggle = e.metaKey && !e.ctrlKey && !e.altKey && !e.shiftKey;
        else
            toggle = e.ctrlKey && !e.metaKey && !e.altKey && !e.shiftKey;
        this._toggleTypeFilter(e.target.typeName, toggle);
    },

    /**
     * @param {string} typeName
     * @param {boolean} allowMultiSelect
     */
    _toggleTypeFilter: function(typeName, allowMultiSelect)
    {
        if (allowMultiSelect && typeName !== WebInspector.NamedBitSetFilterUI.ALL_TYPES)
            this._allowedTypes[WebInspector.NamedBitSetFilterUI.ALL_TYPES] = false;
        else
            this._allowedTypes = {};

        this._allowedTypes[typeName] = !this._allowedTypes[typeName];

        if (this._setting)
            this._setting.set(this._allowedTypes);
        else
            this._update();
    },

    __proto__: WebInspector.Object.prototype
}

/**
 * @constructor
 * @implements {WebInspector.FilterUI}
 * @extends {WebInspector.Object}
 * @param {!Array.<!{value: *, label: string, title: string}>} options
 */
WebInspector.ComboBoxFilterUI = function(options)
{
    this._filterElement = document.createElement("div");
    this._filterElement.className = "filter-combobox-filter";

    this._options = options;
    this._filterComboBox = new WebInspector.StatusBarComboBox(this._filterChanged.bind(this));
    for (var i = 0; i < options.length; ++i) {
        var filterOption = options[i];
        var option = document.createElement("option");
        option.text = filterOption.label;
        option.title = filterOption.title;
        this._filterComboBox.addOption(option);
        this._filterComboBox.element.title = this._filterComboBox.selectedOption().title;
    }
    this._filterElement.appendChild(this._filterComboBox.element);
}

WebInspector.ComboBoxFilterUI.prototype = {
    /**
     * @return {boolean}
     */
    isActive: function()
    {
        return this._filterComboBox.selectedIndex() !== 0;
    },

    /**
     * @return {!Element}
     */
    element: function()
    {
        return this._filterElement;
    },

    /**
     * @param {string} typeName
     * @return {*}
     */
    value: function(typeName)
    {
        var option = this._options[this._filterComboBox.selectedIndex()];
        return option.value;
    },

    /**
     * @param {number} index
     */
    setSelectedIndex: function(index)
    {
        this._filterComboBox.setSelectedIndex(index);
    },

    /**
     * @return {number}
     */
    selectedIndex: function(index)
    {
        return this._filterComboBox.selectedIndex();
    },

    /**
     * @param {?Event} event
     */
    _filterChanged: function(event)
    {
        var option = this._options[this._filterComboBox.selectedIndex()];
        this._filterComboBox.element.title = option.title;
        this.dispatchEventToListeners(WebInspector.FilterUI.Events.FilterChanged, null);
    },

    __proto__: WebInspector.Object.prototype
}

/**
 * @constructor
 * @implements {WebInspector.FilterUI}
 * @extends {WebInspector.Object}
 * @param {string} className
 * @param {string} title
 * @param {boolean=} activeWhenChecked
 * @param {!WebInspector.Setting=} setting
 */
WebInspector.CheckboxFilterUI = function(className, title, activeWhenChecked, setting)
{
    this._filterElement = document.createElement("div");
    this._filterElement.classList.add("filter-checkbox-filter", "filter-checkbox-filter-" + className);
    this._activeWhenChecked = !!activeWhenChecked;
    this._createCheckbox(title);

    if (setting) {
        this._setting = setting;
        setting.addChangeListener(this._settingChanged.bind(this));
        this._settingChanged();
    } else {
        this._checked = !this._activeWhenChecked;
        this._update();
    }
}

WebInspector.CheckboxFilterUI.prototype = {
    /**
     * @return {boolean}
     */
    isActive: function()
    {
        return this._activeWhenChecked === this._checked;
    },

    /**
     * @return {!Element}
     */
    element: function()
    {
        return this._filterElement;
    },

    /**
     * @return {boolean}
     */
    checked: function()
    {
        return this._checked;
    },

    /**
     * @param {boolean} state
     */
    setState: function(state)
    {
        this._checked = state;
        this._update();
    },

    _update: function()
    {
        this._checkElement.classList.toggle("checkbox-filter-checkbox-checked", this._checked);
        this.dispatchEventToListeners(WebInspector.FilterUI.Events.FilterChanged, null);
    },

    _settingChanged: function()
    {
        this._checked = this._setting.get();
        this._update();
    },

    /**
     * @param {?Event} event
     */
    _onClick: function(event)
    {
        this._checked = !this._checked;
        if (this._setting)
            this._setting.set(this._checked);
        else
            this._update();
    },

    /**
     * @param {string} title
     */
    _createCheckbox: function(title)
    {
        var label = this._filterElement.createChild("label");
        var checkBorder = label.createChild("div", "checkbox-filter-checkbox");
        this._checkElement = checkBorder.createChild("div", "checkbox-filter-checkbox-check");
        this._filterElement.addEventListener("click", this._onClick.bind(this), false);
        var typeElement = label.createChild("span", "type");
        typeElement.textContent = title;
    },

    __proto__: WebInspector.Object.prototype
}
