//----------------------------------------------------------------------------
//  Copyright (C) 2008-2011  The IPython Development Team
//
//  Distributed under the terms of the BSD License.  The full license is in
//  the file COPYING, distributed as part of this software.
//----------------------------------------------------------------------------

//============================================================================
// Tooltip
//============================================================================
//
// you can set the autocall time by setting `IPython.tooltip.time_before_tooltip` in ms
//
// you can configure the differents action of pressing tab several times in a row by
// setting/appending different fonction in the array
// IPython.tooltip.tabs_functions
//
// eg :
// IPython.tooltip.tabs_functions[4] = function(){console.log('this is the action of the 4th tab pressing')}
//

var IPython = (function (IPython) {
    "use strict";

    var utils = IPython.utils;

    // tooltip constructor
    var Tooltip = function () {
        var that = this;
        this.time_before_tooltip = 1200;

        // handle to html
        this.tooltip = $('#tooltip');
        this._hidden = true;

        // variable for consecutive call
        this._old_cell = null ;
        this._old_request = null ;
        this._consecutive_counter = 0;

        // 'sticky ?'
        this._sticky = false;

        // contain the button in the upper right corner
        this.buttons = $('<div/>')
              .addClass('tooltipbuttons');

        // will contain the docstring
        this.text    = $('<div/>')
          .addClass('tooltiptext')
          .addClass('smalltooltip');

        // build the buttons menu on the upper right

        // expand the tooltip to see more
        var expandlink=$('<a/>').attr('href',"#")
              .addClass("ui-corner-all") //rounded corner
              .attr('role',"button")
              .attr('id','expanbutton')
              .attr('title','Grow the tooltip vertically (press tab 2 times)')
              .click(function(){that.expand()})
            .append(
        $('<span/>').text('Expand')
            .addClass('ui-icon')
            .addClass('ui-icon-plus')
        );

        // open in pager
        var morelink=$('<a/>').attr('href',"#")
            .attr('role',"button")
            .addClass('ui-button')
            .attr('title','show the current docstring in pager (press tab 4 times)');
        var morespan=$('<span/>').text('Open in Pager')
            .addClass('ui-icon')
            .addClass('ui-icon-arrowstop-l-n');
        morelink.append(morespan);
        morelink.click(function(){
            that.showInPager();
        });

        // close the tooltip
        var closelink=$('<a/>').attr('href',"#")
            .attr('role',"button")
            .addClass('ui-button');
        var closespan=$('<span/>').text('Close')
            .addClass('ui-icon')
            .addClass('ui-icon-close');
        closelink.append(closespan);
        closelink.click(function(){
        that.remove_and_cancel_tooltip(true);
            });

        this._clocklink=$('<a/>').attr('href',"#");
        this._clocklink.attr('role',"button");
        this._clocklink.addClass('ui-button');
        this._clocklink.attr('title','Tootip is not dismissed while typing for 10 seconds');
        var clockspan=$('<span/>').text('Close');
            clockspan.addClass('ui-icon');
            clockspan.addClass('ui-icon-clock');
        this._clocklink.append(clockspan);
        this._clocklink.click(function(){
            that.cancel_stick();
            });




        //construct the tooltip
        // add in the reverse order you want them to appear
        this.buttons.append(closelink);
        this.buttons.append(expandlink);
        this.buttons.append(morelink);
        this.buttons.append(this._clocklink);
        this._clocklink.hide();


        // we need a phony element to make the small arrow
        // of the tooltip in css
        // we will move the arrow later
        this.arrow = $('<div/>').addClass('pretooltiparrow');
        this.tooltip.append(this.buttons);
        this.tooltip.append(this.arrow);
        this.tooltip.append(this.text);

        // function that will be called if you press tab 1, 2, 3... times in a row
        this.tabs_functions = [  function(cell,text){that._request_tooltip(cell,text)},
                                 function(){that.expand()},
                                 function(){that.stick()},
                                 function(){
                                    that.cancel_stick();
                                    that.showInPager();
                                    that._cmfocus();
                                    }
                                ];
        // call after all the tabs function above have bee call to clean their effects
        // if necessary
        this.reset_tabs_function = function(cell,text){
            this._old_cell = (cell)? cell : null ;
            this._old_request = (text) ? text : null ;
            this._consecutive_counter = 0;
        }
    };

    Tooltip.prototype.showInPager = function()
    {
        // reexecute last call in pager by appending ? to show back in pager
        var that = this;
        var callbacks = {'execute_reply': $.proxy(that._handle_execute_reply,that)}
        var msg_id = IPython.notebook.kernel.execute(this.name+"?", callbacks);

        this.remove_and_cancel_tooltip();
        this._cmfocus();
    }

    // grow the tooltip verticaly
    Tooltip.prototype.expand = function(){
        this.text.removeClass('smalltooltip');
        this.text.addClass('bigtooltip');
        $('#expanbutton').hide('slow');
        this._cmfocus();
    }

    // deal with all the logic of hiding the tooltip
    // and reset it's status
    Tooltip.prototype.hide = function()
    {
         this.tooltip.addClass('hide');
         $('#expanbutton').show('slow');
         this.text.removeClass('bigtooltip');
         this.text.addClass('smalltooltip');
         // keep scroll top to be sure to always see the first line
         this.text.scrollTop(0);
         this._hidden = true;
    }

    Tooltip.prototype.remove_and_cancel_tooltip = function(force) {
        // note that we don't handle closing directly inside the calltip
        // as in the completer, because it is not focusable, so won't
        // get the event.
        if(this._sticky == false || force == true)
        {
            this.hide();
        }
        this.cancel_pending();
        this.reset_tabs_function();
    }

    // cancel autocall done after '(' for example.
    Tooltip.prototype.cancel_pending = function(){
        if (this._tooltip_timeout != null){
            clearTimeout(this._tooltip_timeout);
            this._tooltip_timeout = null;
        }
    }

    // will trigger tooltip after timeout
    Tooltip.prototype.pending = function(cell)
    {
        var that = this;
        this._tooltip_timeout = setTimeout(function(){that.request(cell)} , that.time_before_tooltip);
    }

    Tooltip.prototype._request_tooltip = function(cell,func)
    {
       // use internally just to make the request to the kernel

       // Feel free to shorten this logic if you are better
       // than me in regEx
       // basicaly you shoul be able to get xxx.xxx.xxx from
       // something(range(10), kwarg=smth) ; xxx.xxx.xxx( firstarg, rand(234,23), kwarg1=2,
       // remove everything between matchin bracket (need to iterate)
       var matchBracket = /\([^\(\)]+\)/g;
       var endBracket = /\([^\(]*$/g;
       var oldfunc = func;

       func = func.replace(matchBracket,"");
       while( oldfunc != func )
       {
           oldfunc = func;
           func = func.replace(matchBracket,"");
       }
       // remove everything after last open bracket
       func = func.replace(endBracket,"");

       var re = /[a-z_][0-9a-z._]+$/gi; // casse insensitive
       var callbacks = {'object_info_reply': $.proxy(this.show,this)}
       var msg_id = IPython.notebook.kernel.object_info_request(re.exec(func), callbacks);
    }

    // make an imediate completion request
    Tooltip.prototype.request = function(cell)
    {
        // request(codecell)
        // Deal with extracting the text from the cell and counting
        // call in a row

        this.cancel_pending();
        var editor = cell.code_mirror;
        var cursor = editor.getCursor();
        var text = editor.getRange({line:cursor.line,ch:0},cursor).trim();

        // need a permanent handel to codemirror for future auto recall
        this.code_mirror = editor;

        // now we treat the different number of keypress
        // first if same cell, same text, increment counter by 1
        if( this._old_cell == cell && this._old_request == text && this._hidden == false)
        {
            this._consecutive_counter++;
        } else {
            // else reset
            this.cancel_stick();
            this.reset_tabs_function(cell,text);
        }

        // don't do anything if line beggin with '(' or is empty
        if (text === "" || text === "(" ) {
            return;
        }

        this.tabs_functions[this._consecutive_counter](cell,text);

        // then if we are at the end of list function, reset
        if (this._consecutive_counter == this.tabs_functions.length)
            this.reset_tabs_function(cell,text);

        return;
    }

    // cancel the option of having the tooltip to stick
    Tooltip.prototype.cancel_stick = function()
    {
            console.log('cancel stick');
            clearTimeout(this._stick_timeout);
            this._stick_timeout = null;
            this._clocklink.hide('slow');
            this._sticky = false;
    }

    // put the tooltip in a sicky state for 10 seconds
    // it won't be removed by remove_and_cancell() unless you called with
    // the first parameter set to true.
    // remove_and_cancell_tooltip(true)
    Tooltip.prototype.stick = function()
    {
        var that = this;
        this._sticky = true;
        this._clocklink.show('slow');
        this._stick_timeout = setTimeout( function(){
            that._sticky = false;
            that._clocklink.hide('slow');
            }, 10*1000
        );
    }

    // should be called with the kernel reply to actually show the tooltip
    Tooltip.prototype.show = function(reply)
    {
        // move the bubble if it is not hidden
        // otherwise fade it
        this.name = reply.name;

        // do some math to have the tooltip arrow on more or less on left or right
        // width of the editor
        var w = $(this.code_mirror.getScrollerElement()).width();
        // ofset of the editor
        var o = $(this.code_mirror.getScrollerElement()).offset();
        var pos = this.code_mirror.cursorCoords();
        var xinit = pos.x;
        var xinter = o.left + (xinit-o.left)/w*(w-450);
        var posarrowleft = xinit - xinter;


        if( this._hidden == false)
        {
            this.tooltip.animate({'left' : xinter-30+'px','top' :(pos.yBot+10)+'px'});
        } else
        {
            this.tooltip.css({'left' : xinter-30+'px'});
            this.tooltip.css({'top' :(pos.yBot+10)+'px'});
        }
        this.arrow.animate({'left' : posarrowleft+'px'});
        this.tooltip.removeClass('hidden')
        this.tooltip.removeClass('hide');
        this._hidden = false;

        // build docstring
        var defstring = reply.call_def;
        if (defstring == null) { defstring = reply.init_definition; }
        if (defstring == null) { defstring = reply.definition; }

        var docstring = reply.call_docstring;
        if (docstring == null) { docstring = reply.init_docstring; }
        if (docstring == null) { docstring = reply.docstring; }
        if (docstring == null) { docstring = "<empty docstring>"; }

        this.text.children().remove();

        var pre=$('<pre/>').html(utils.fixConsole(docstring));
        if(defstring){
            var defstring_html = $('<pre/>').html(utils.fixConsole(defstring));
            this.text.append(defstring_html);
        }
        this.text.append(pre);
        // keep scroll top to be sure to always see the first line
        this.text.scrollTop(0);
    }

    // convenient funciton to have the correct codemirror back into focus
    Tooltip.prototype._cmfocus = function()
    {
        var cm = this.code_mirror;
        setTimeout(function(){cm.focus();}, 50);
    }

    IPython.Tooltip = Tooltip;

    return IPython;

}(IPython));