/* ***** BEGIN LICENSE BLOCK *****
 * Distributed under the BSD license:
 *
 * Copyright (c) 2010, Ajax.org B.V.
 * All rights reserved.
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 * 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.
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 *       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
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 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
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define(function(require, exports, module) {
"use strict";

var dom = require("../lib/dom");
var lang = require("../lib/lang");
var event = require("../lib/event");
var searchboxCss = require("../requirejs/text!./searchbox.css");
var HashHandler = require("../keyboard/hash_handler").HashHandler;
var keyUtil = require("../lib/keys");

var MAX_COUNT = 999;

dom.importCssString(searchboxCss, "ace_searchbox");

var SearchBox = function(editor, range, showReplaceForm) {
    var div = dom.createElement("div");
    dom.buildDom(["div", {class:"ace_search right"},
        ["span", {action: "hide", class: "ace_searchbtn_close"}],
        ["div", {class: "ace_search_form"},
            ["input", {class: "ace_search_field", placeholder: "Search for", spellcheck: "false"}],
            ["span", {action: "findPrev", class: "ace_searchbtn prev"}, "\u200b"],
            ["span", {action: "findNext", class: "ace_searchbtn next"}, "\u200b"],
            ["span", {action: "findAll", class: "ace_searchbtn", title: "Alt-Enter"}, "All"]
        ],
        ["div", {class: "ace_replace_form"},
            ["input", {class: "ace_search_field", placeholder: "Replace with", spellcheck: "false"}],
            ["span", {action: "replaceAndFindNext", class: "ace_searchbtn"}, "Replace"],
            ["span", {action: "replaceAll", class: "ace_searchbtn"}, "All"]
        ],
        ["div", {class: "ace_search_options"},
            ["span", {action: "toggleReplace", class: "ace_button", title: "Toggle Replace mode",
                style: "float:left;margin-top:-2px;padding:0 5px;"}, "+"],
            ["span", {class: "ace_search_counter"}],
            ["span", {action: "toggleRegexpMode", class: "ace_button", title: "RegExp Search"}, ".*"],
            ["span", {action: "toggleCaseSensitive", class: "ace_button", title: "CaseSensitive Search"}, "Aa"],
            ["span", {action: "toggleWholeWords", class: "ace_button", title: "Whole Word Search"}, "\\b"],
            ["span", {action: "searchInSelection", class: "ace_button", title: "Search In Selection"}, "S"]
        ]
    ], div);
    this.element = div.firstChild;
    
    this.setSession = this.setSession.bind(this);

    this.$init();
    this.setEditor(editor);
    dom.importCssString(searchboxCss, "ace_searchbox", editor.container);
};

(function() {
    this.setEditor = function(editor) {
        editor.searchBox = this;
        editor.renderer.scroller.appendChild(this.element);
        this.editor = editor;
    };
    
    this.setSession = function(e) {
        this.searchRange = null;
        this.$syncOptions(true);
    };

    this.$initElements = function(sb) {
        this.searchBox = sb.querySelector(".ace_search_form");
        this.replaceBox = sb.querySelector(".ace_replace_form");
        this.searchOption = sb.querySelector("[action=searchInSelection]");
        this.replaceOption = sb.querySelector("[action=toggleReplace]");
        this.regExpOption = sb.querySelector("[action=toggleRegexpMode]");
        this.caseSensitiveOption = sb.querySelector("[action=toggleCaseSensitive]");
        this.wholeWordOption = sb.querySelector("[action=toggleWholeWords]");
        this.searchInput = this.searchBox.querySelector(".ace_search_field");
        this.replaceInput = this.replaceBox.querySelector(".ace_search_field");
        this.searchCounter = sb.querySelector(".ace_search_counter");
    };
    
    this.$init = function() {
        var sb = this.element;
        
        this.$initElements(sb);
        
        var _this = this;
        event.addListener(sb, "mousedown", function(e) {
            setTimeout(function(){
                _this.activeInput.focus();
            }, 0);
            event.stopPropagation(e);
        });
        event.addListener(sb, "click", function(e) {
            var t = e.target || e.srcElement;
            var action = t.getAttribute("action");
            if (action && _this[action])
                _this[action]();
            else if (_this.$searchBarKb.commands[action])
                _this.$searchBarKb.commands[action].exec(_this);
            event.stopPropagation(e);
        });

        event.addCommandKeyListener(sb, function(e, hashId, keyCode) {
            var keyString = keyUtil.keyCodeToString(keyCode);
            var command = _this.$searchBarKb.findKeyCommand(hashId, keyString);
            if (command && command.exec) {
                command.exec(_this);
                event.stopEvent(e);
            }
        });

        this.$onChange = lang.delayedCall(function() {
            _this.find(false, false);
        });

        event.addListener(this.searchInput, "input", function() {
            _this.$onChange.schedule(20);
        });
        event.addListener(this.searchInput, "focus", function() {
            _this.activeInput = _this.searchInput;
            _this.searchInput.value && _this.highlight();
        });
        event.addListener(this.replaceInput, "focus", function() {
            _this.activeInput = _this.replaceInput;
            _this.searchInput.value && _this.highlight();
        });
    };

    //keybinding outside of the searchbox
    this.$closeSearchBarKb = new HashHandler([{
        bindKey: "Esc",
        name: "closeSearchBar",
        exec: function(editor) {
            editor.searchBox.hide();
        }
    }]);

    //keybinding outside of the searchbox
    this.$searchBarKb = new HashHandler();
    this.$searchBarKb.bindKeys({
        "Ctrl-f|Command-f": function(sb) {
            var isReplace = sb.isReplace = !sb.isReplace;
            sb.replaceBox.style.display = isReplace ? "" : "none";
            sb.replaceOption.checked = false;
            sb.$syncOptions();
            sb.searchInput.focus();
        },
        "Ctrl-H|Command-Option-F": function(sb) {
            if (sb.editor.getReadOnly())
                return;
            sb.replaceOption.checked = true;
            sb.$syncOptions();
            sb.replaceInput.focus();
        },
        "Ctrl-G|Command-G": function(sb) {
            sb.findNext();
        },
        "Ctrl-Shift-G|Command-Shift-G": function(sb) {
            sb.findPrev();
        },
        "esc": function(sb) {
            setTimeout(function() { sb.hide();});
        },
        "Return": function(sb) {
            if (sb.activeInput == sb.replaceInput)
                sb.replace();
            sb.findNext();
        },
        "Shift-Return": function(sb) {
            if (sb.activeInput == sb.replaceInput)
                sb.replace();
            sb.findPrev();
        },
        "Alt-Return": function(sb) {
            if (sb.activeInput == sb.replaceInput)
                sb.replaceAll();
            sb.findAll();
        },
        "Tab": function(sb) {
            (sb.activeInput == sb.replaceInput ? sb.searchInput : sb.replaceInput).focus();
        }
    });

    this.$searchBarKb.addCommands([{
        name: "toggleRegexpMode",
        bindKey: {win: "Alt-R|Alt-/", mac: "Ctrl-Alt-R|Ctrl-Alt-/"},
        exec: function(sb) {
            sb.regExpOption.checked = !sb.regExpOption.checked;
            sb.$syncOptions();
        }
    }, {
        name: "toggleCaseSensitive",
        bindKey: {win: "Alt-C|Alt-I", mac: "Ctrl-Alt-R|Ctrl-Alt-I"},
        exec: function(sb) {
            sb.caseSensitiveOption.checked = !sb.caseSensitiveOption.checked;
            sb.$syncOptions();
        }
    }, {
        name: "toggleWholeWords",
        bindKey: {win: "Alt-B|Alt-W", mac: "Ctrl-Alt-B|Ctrl-Alt-W"},
        exec: function(sb) {
            sb.wholeWordOption.checked = !sb.wholeWordOption.checked;
            sb.$syncOptions();
        }
    }, {
        name: "toggleReplace",
        exec: function(sb) {
            sb.replaceOption.checked = !sb.replaceOption.checked;
            sb.$syncOptions();
        }
    }, {
        name: "searchInSelection",
        exec: function(sb) {
            sb.searchOption.checked = !sb.searchRange;
            sb.setSearchRange(sb.searchOption.checked && sb.editor.getSelectionRange());
            sb.$syncOptions();
        }
    }]);
    
    this.setSearchRange = function(range) {
        this.searchRange = range;
        if (range) {
            this.searchRangeMarker = this.editor.session.addMarker(range, "ace_active-line");
        } else if (this.searchRangeMarker) {
            this.editor.session.removeMarker(this.searchRangeMarker);
            this.searchRangeMarker = null;
        }
    };

    this.$syncOptions = function(preventScroll) {
        dom.setCssClass(this.replaceOption, "checked", this.searchRange);
        dom.setCssClass(this.searchOption, "checked", this.searchOption.checked);
        this.replaceOption.textContent = this.replaceOption.checked ? "-" : "+";
        dom.setCssClass(this.regExpOption, "checked", this.regExpOption.checked);
        dom.setCssClass(this.wholeWordOption, "checked", this.wholeWordOption.checked);
        dom.setCssClass(this.caseSensitiveOption, "checked", this.caseSensitiveOption.checked);
        var readOnly = this.editor.getReadOnly();
        this.replaceOption.style.display = readOnly ? "none" : "";
        this.replaceBox.style.display = this.replaceOption.checked && !readOnly ? "" : "none";
        this.find(false, false, preventScroll);
    };

    this.highlight = function(re) {
        this.editor.session.highlight(re || this.editor.$search.$options.re);
        this.editor.renderer.updateBackMarkers();
    };
    this.find = function(skipCurrent, backwards, preventScroll) {
        var range = this.editor.find(this.searchInput.value, {
            skipCurrent: skipCurrent,
            backwards: backwards,
            wrap: true,
            regExp: this.regExpOption.checked,
            caseSensitive: this.caseSensitiveOption.checked,
            wholeWord: this.wholeWordOption.checked,
            preventScroll: preventScroll,
            range: this.searchRange
        });
        var noMatch = !range && this.searchInput.value;
        dom.setCssClass(this.searchBox, "ace_nomatch", noMatch);
        this.editor._emit("findSearchBox", { match: !noMatch });
        this.highlight();
        this.updateCounter();
    };
    this.updateCounter = function() {
        var editor = this.editor;
        var regex = editor.$search.$options.re;
        var all = 0;
        var before = 0;
        if (regex) {
            var value = this.searchRange
                ? editor.session.getTextRange(this.searchRange)
                : editor.getValue();
            
            var offset = editor.session.doc.positionToIndex(editor.selection.anchor);
            if (this.searchRange)
                offset -= editor.session.doc.positionToIndex(this.searchRange.start);
                
            var last = regex.lastIndex = 0;
            var m;
            while ((m = regex.exec(value))) {
                all++;
                last = m.index;
                if (last <= offset)
                    before++;
                if (all > MAX_COUNT)
                    break;
                if (!m[0]) {
                    regex.lastIndex = last += 1;
                    if (last >= value.length)
                        break;
                }
            }
        }
        this.searchCounter.textContent = before + " of " + (all > MAX_COUNT ? MAX_COUNT + "+" : all);
    };
    this.findNext = function() {
        this.find(true, false);
    };
    this.findPrev = function() {
        this.find(true, true);
    };
    this.findAll = function(){
        var range = this.editor.findAll(this.searchInput.value, {            
            regExp: this.regExpOption.checked,
            caseSensitive: this.caseSensitiveOption.checked,
            wholeWord: this.wholeWordOption.checked
        });
        var noMatch = !range && this.searchInput.value;
        dom.setCssClass(this.searchBox, "ace_nomatch", noMatch);
        this.editor._emit("findSearchBox", { match: !noMatch });
        this.highlight();
        this.hide();
    };
    this.replace = function() {
        if (!this.editor.getReadOnly())
            this.editor.replace(this.replaceInput.value);
    };    
    this.replaceAndFindNext = function() {
        if (!this.editor.getReadOnly()) {
            this.editor.replace(this.replaceInput.value);
            this.findNext();
        }
    };
    this.replaceAll = function() {
        if (!this.editor.getReadOnly())
            this.editor.replaceAll(this.replaceInput.value);
    };

    this.hide = function() {
        this.active = false;
        this.setSearchRange(null);
        this.editor.off("changeSession", this.setSession);
        
        this.element.style.display = "none";
        this.editor.keyBinding.removeKeyboardHandler(this.$closeSearchBarKb);
        this.editor.focus();
    };
    this.show = function(value, isReplace) {
        this.active = true;
        this.editor.on("changeSession", this.setSession);
        this.element.style.display = "";
        this.replaceOption.checked = isReplace;
        
        if (value)
            this.searchInput.value = value;
        
        this.searchInput.focus();
        this.searchInput.select();

        this.editor.keyBinding.addKeyboardHandler(this.$closeSearchBarKb);
        
        this.$syncOptions(true);
    };

    this.isFocused = function() {
        var el = document.activeElement;
        return el == this.searchInput || el == this.replaceInput;
    };
}).call(SearchBox.prototype);

exports.SearchBox = SearchBox;

exports.Search = function(editor, isReplace) {
    var sb = editor.searchBox || new SearchBox(editor);
    sb.show(editor.session.getTextRange(), isReplace);
};

});


/* ------------------------------------------------------------------------------------------
 * TODO
 * --------------------------------------------------------------------------------------- */
/*
- move search form to the left if it masks current word
- include all options that search has. ex: regex
- searchbox.searchbox is not that pretty. We should have just searchbox
- disable prev button if it makes sense
*/