/*
 * Copyright (C) 2013 Apple 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:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
 */

WebInspector.FindBanner = function(delegate, element) {
    WebInspector.Object.call(this);

    this._delegate = delegate || null;

    this._element = element || document.createElement("div");
    this._element.classList.add(WebInspector.FindBanner.StyleClassName);

    this._resultCountLabel = document.createElement("label");
    this._element.appendChild(this._resultCountLabel);

    this._previousResultButton = document.createElement("button");
    this._previousResultButton.classList.add(WebInspector.FindBanner.SegmentedButtonStyleClassName);
    this._previousResultButton.classList.add(WebInspector.FindBanner.LeftSegmentButtonStyleClassName);
    this._previousResultButton.disabled = true;
    this._previousResultButton.addEventListener("click", this._previousResultButtonClicked.bind(this));
    this._element.appendChild(this._previousResultButton);

    var previousResultButtonGlyphElement = document.createElement("div");
    previousResultButtonGlyphElement.classList.add(WebInspector.FindBanner.SegmentGlyphStyleClassName);
    this._previousResultButton.appendChild(previousResultButtonGlyphElement);

    this._nextResultButton = document.createElement("button");
    this._nextResultButton.classList.add(WebInspector.FindBanner.SegmentedButtonStyleClassName);
    this._nextResultButton.classList.add(WebInspector.FindBanner.RightSegmentButtonStyleClassName);
    this._nextResultButton.disabled = true;
    this._nextResultButton.addEventListener("click", this._nextResultButtonClicked.bind(this));
    this._element.appendChild(this._nextResultButton);

    var nextResultButtonGlyphElement = document.createElement("div");
    nextResultButtonGlyphElement.classList.add(WebInspector.FindBanner.SegmentGlyphStyleClassName);
    this._nextResultButton.appendChild(nextResultButtonGlyphElement);

    this._inputField = document.createElement("input");
    this._inputField.type = "search";
    this._inputField.spellcheck = false;
    this._inputField.incremental = true;
    this._inputField.setAttribute("results", 5);
    this._inputField.setAttribute("autosave", "inspector-search");
    this._inputField.addEventListener("keydown", this._inputFieldKeyDown.bind(this), false);
    this._inputField.addEventListener("keyup", this._inputFieldKeyUp.bind(this), false);
    this._inputField.addEventListener("search", this._inputFieldSearch.bind(this), false);
    this._element.appendChild(this._inputField);

    this._doneButton = document.createElement("button");
    this._doneButton.textContent = WebInspector.UIString("Done");
    this._doneButton.addEventListener("click", this._doneButtonClicked.bind(this));
    this._element.appendChild(this._doneButton);

    this._numberOfResults = null;
    this._searchBackwards = false;
    this._searchKeyPressed = false;
    this._previousSearchValue = "";

    this._hideKeyboardShortcut = new WebInspector.KeyboardShortcut(null, WebInspector.KeyboardShortcut.Key.Escape, this.hide.bind(this), this._element);
    this._populateFindKeyboardShortcut = new WebInspector.KeyboardShortcut(WebInspector.KeyboardShortcut.Modifier.CommandOrControl, "E", this._populateSearchQueryFromSelection.bind(this));
    this._populateFindKeyboardShortcut.implicitlyPreventsDefault = false;
    this._findNextKeyboardShortcut = new WebInspector.KeyboardShortcut(WebInspector.KeyboardShortcut.Modifier.CommandOrControl, "G", this._nextResultButtonClicked.bind(this));
    this._findPreviousKeyboardShortcut = new WebInspector.KeyboardShortcut(WebInspector.KeyboardShortcut.Modifier.Shift | WebInspector.KeyboardShortcut.Modifier.CommandOrControl, "G", this._previousResultButtonClicked.bind(this));

    this._generateButtonsGlyphsIfNeeded();
};

WebInspector.Object.addConstructorFunctions(WebInspector.FindBanner);

WebInspector.FindBanner.StyleClassName = "find-banner";
WebInspector.FindBanner.SupportsFindBannerStyleClassName = "supports-find-banner";
WebInspector.FindBanner.ShowingFindBannerStyleClassName = "showing-find-banner";
WebInspector.FindBanner.NoTransitionStyleClassName = "no-find-banner-transition";
WebInspector.FindBanner.ShowingStyleClassName = "showing";
WebInspector.FindBanner.SegmentedButtonStyleClassName = "segmented";
WebInspector.FindBanner.LeftSegmentButtonStyleClassName = "left";
WebInspector.FindBanner.RightSegmentButtonStyleClassName = "right";
WebInspector.FindBanner.SegmentGlyphStyleClassName = "glyph";

WebInspector.FindBanner.Event = {
    DidShow: "find-banner-did-show",
    DidHide: "find-banner-did-hide"
}

WebInspector.FindBanner.prototype = {
    constructor: WebInspector.FindBanner,

    // Public

    get delegate()
    {
        return this._delegate;
    },

    set delegate(newDelegate)
    {
        this._delegate = newDelegate || null;
    },

    get element()
    {
        return this._element;
    },

    get inputField()
    {
        return this._inputField;
    },

    get searchQuery()
    {
        return this._inputField.value || "";
    },

    set searchQuery(query)
    {
        this._inputField.value = query || "";
    },

    get numberOfResults()
    {
        return this._numberOfResults;
    },

    set numberOfResults(numberOfResults)
    {
        if (numberOfResults === undefined || isNaN(numberOfResults))
            numberOfResults = null;

        this._numberOfResults = numberOfResults;

        this._previousResultButton.disabled = this._nextResultButton.disabled = (numberOfResults <= 0);

        if (numberOfResults === null)
            this._resultCountLabel.textContent = "";
        else if (numberOfResults <= 0)
            this._resultCountLabel.textContent = WebInspector.UIString("Not found");
        else if (numberOfResults === 1)
            this._resultCountLabel.textContent = WebInspector.UIString("1 match");
        else if (numberOfResults > 1)
            this._resultCountLabel.textContent = WebInspector.UIString("%d matches").format(numberOfResults);
    },

    get targetElement()
    {
        return this._targetElement;
    },

    set targetElement(element)
    {
        if (this._targetElement) {
            var oldTargetElement = this._targetElement;

            this._targetElement.classList.add(WebInspector.FindBanner.NoTransitionStyleClassName);
            this._targetElement.classList.remove(WebInspector.FindBanner.SupportsFindBannerStyleClassName);
            this._targetElement.classList.remove(WebInspector.FindBanner.ShowingFindBannerStyleClassName);

            this._element.classList.add(WebInspector.FindBanner.NoTransitionStyleClassName);
            this._element.classList.remove(WebInspector.FindBanner.ShowingStyleClassName);

            function delayedWork()
            {
                oldTargetElement.classList.remove(WebInspector.FindBanner.NoTransitionStyleClassName);
                this._element.classList.remove(WebInspector.FindBanner.NoTransitionStyleClassName);
            }

            // Delay so we can remove the no transition style class after the other style changes are committed.
            setTimeout(delayedWork.bind(this), 0);
        }

        this._targetElement = element || null;

        if (this._targetElement)
            this._targetElement.classList.add(WebInspector.FindBanner.SupportsFindBannerStyleClassName);
    },

    get showing()
    {
        return this._element.classList.contains(WebInspector.FindBanner.ShowingStyleClassName);
    },

    show: function()
    {
        console.assert(this._targetElement);
        if (!this._targetElement)
            return;

        console.assert(this._targetElement.parentNode);
        if (!this._targetElement.parentNode)
            return;

        if (this._element.parentNode !== this._targetElement.parentNode)
            this._targetElement.parentNode.insertBefore(this._element, this._targetElement);

        function delayedWork()
        {
            this._targetElement.classList.add(WebInspector.FindBanner.ShowingFindBannerStyleClassName);
            this._element.classList.add(WebInspector.FindBanner.ShowingStyleClassName);

            this._inputField.select();
        }

        // Delay adding the classes in case the target element and/or the find banner were just added to
        // the document. Adding the class right away will prevent the animation from working the firs time.
        setTimeout(delayedWork.bind(this), 0);

        this.dispatchEventToListeners(WebInspector.FindBanner.Event.DidShow);
    },

    hide: function()
    {
        console.assert(this._targetElement);
        if (!this._targetElement)
            return;

        this._inputField.blur();

        this._targetElement.classList.remove(WebInspector.FindBanner.ShowingFindBannerStyleClassName);
        this._element.classList.remove(WebInspector.FindBanner.ShowingStyleClassName);

        this.dispatchEventToListeners(WebInspector.FindBanner.Event.DidHide);
    },

    // Private

    _inputFieldKeyDown: function(event)
    {
        if (event.keyIdentifier === "Shift")
            this._searchBackwards = true;
        else if (event.keyIdentifier === "Enter")
            this._searchKeyPressed = true;
    },

    _inputFieldKeyUp: function(event)
    {
        if (event.keyIdentifier === "Shift")
            this._searchBackwards = false;
        else if (event.keyIdentifier === "Enter")
            this._searchKeyPressed = false;
    },

    _inputFieldSearch: function(event)
    {
        if (this._inputField.value) {
            if (this._previousSearchValue !== this.searchQuery) {
                if (this._delegate && typeof this._delegate.findBannerPerformSearch === "function")
                    this._delegate.findBannerPerformSearch(this, this.searchQuery);
            } else if (this._searchKeyPressed && this._numberOfResults > 0) {
                if (this._searchBackwards) {
                    if (this._delegate && typeof this._delegate.findBannerRevealPreviousResult === "function")
                        this._delegate.findBannerRevealPreviousResult(this);
                } else {
                    if (this._delegate && typeof this._delegate.findBannerRevealNextResult === "function")
                        this._delegate.findBannerRevealNextResult(this);
                }
            }
        } else {
            this.numberOfResults = null;

            if (this._delegate && typeof this._delegate.findBannerSearchCleared === "function")
                this._delegate.findBannerSearchCleared(this);
        }

        this._previousSearchValue = this.searchQuery;
    },

    _populateSearchQueryFromSelection: function(event)
    {
        if (this._delegate && typeof this._delegate.findBannerSearchQueryForSelection === "function") {
            var query = this._delegate.findBannerSearchQueryForSelection(this);
            if (query) {
                this.searchQuery = query;

                if (this._delegate && typeof this._delegate.findBannerPerformSearch === "function")
                    this._delegate.findBannerPerformSearch(this, this.searchQuery);
            }
        }
    },

    _previousResultButtonClicked: function(event)
    {
        if (this._delegate && typeof this._delegate.findBannerRevealPreviousResult === "function")
            this._delegate.findBannerRevealPreviousResult(this);
    },

    _nextResultButtonClicked: function(event)
    {
        if (this._delegate && typeof this._delegate.findBannerRevealNextResult === "function")
            this._delegate.findBannerRevealNextResult(this);
    },

    _doneButtonClicked: function(event)
    {
        this.hide();
    },

    _generateButtonsGlyphsIfNeeded: function()
    {
        if (WebInspector.FindBanner._generatedButtonsGlyphs)
            return;

        WebInspector.FindBanner._generatedButtonsGlyphs = true;

        var specifications = {};
        specifications["normal"] = {fillColor: [81, 81, 81]};
        specifications["normal-active"] = {fillColor: [37, 37, 37]};

        generateColoredImagesForCSS("Images/BackArrow.svg", specifications, 7, 7, "find-banner-previous-arrow-");
        generateColoredImagesForCSS("Images/ForwardArrow.svg", specifications, 7, 7, "find-banner-next-arrow-");
    }
};

WebInspector.FindBanner.prototype.__proto__ = WebInspector.Object.prototype;