/**

 * Functions dedicated to edition.

 *

 *  :organization: Logilab

 *  :copyright: 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

 *  :contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr

 *

 */

//============= Eproperty form functions =====================================//

/**

 * .. function:: setPropValueWidget(varname, tabindex)

 *

 * called on Eproperty key selection:

 * - get the selected value

 * - get a widget according to the key by a sync query to the server

 * - fill associated div with the returned html

 *

 * * `varname`, the name of the variable as used in the original creation form

 * * `tabindex`, the tabindex that should be set on the widget

 */

function setPropValueWidget(varname, tabindex) {

    var key = firstSelected(document.getElementById('pkey:' + varname));

    if (key) {

        var args = {

            fname: 'prop_widget',

            pageid: pageid,

            arg: map(jQuery.toJSON, [key, varname, tabindex])

        };

        jqNode('div:value:' + varname).loadxhtml(JSON_BASE_URL, args, 'post');

    }

}

// *** EDITION FUNCTIONS ****************************************** //

/**

 * .. function:: reorderTabindex(start, formid)

 *

 * this function is called when an AJAX form was generated to

 * make sure tabindex remains consistent

 */

function reorderTabindex(start, formid) {

    var form = getNode(formid || 'entityForm');

    var inputTypes = ['INPUT', 'SELECT', 'TEXTAREA'];

    var tabindex = (start == null) ? 15: start;

    nodeWalkDepthFirst(form, function(elem) {

        var tagName = elem.tagName.toUpperCase();

        if (inputTypes.contains(tagName)) {

            if (jQuery(elem).attr('tabindex') != null) {

                tabindex += 1;

		jQuery(elem).attr('tabindex', tabindex);

            }

            return null;

        }

        return jQuery.grep(elem.childNodes, isElementNode);

    });

}

function showMatchingSelect(selectedValue, eid) {

    if (selectedValue) {

        divId = 'div' + selectedValue + '_' + eid;

        var divNode = jQuery('#' + divId);

        if (!divNode.length) {

            var args = {

                vid: 'unrelateddivs',

                relation: selectedValue,

                rql: rql_for_eid(eid),

                '__notemplate': 1,

                callback: function() {

                    _showMatchingSelect(eid, jQuery('#' + divId));

                }

            };

            jQuery('#unrelatedDivs_' + eid).loadxhtml(baseuri() + 'view', args, 'post', 'append');

        } else {

            _showMatchingSelect(eid, divNode);

        }

    } else {

        _showMatchingSelect(eid, null);

    }

}

/**

 * .. function:: _showMatchingSelect(eid, divNode)

 *

 * * `divNode`, a jQuery selection

 */

function _showMatchingSelect(eid, divNode) {

    // hide all divs, and then show the matching one

    // (would actually be better to directly hide the displayed one)

    jQuery('#unrelatedDivs_' + eid).children().hide();

    // divNode not found means 'no relation selected' (i.e. first blank item)

    if (divNode && divNode.length) {

        divNode.show();

    }

}

/**

 * .. function:: buildPendingInsertHandle(elementId, element_name, selectNodeId, eid)

 *

 * this function builds a Handle to cancel pending insertion

 */

function buildPendingInsertHandle(elementId, element_name, selectNodeId, eid) {

    jscall = "javascript: cancelPendingInsert('" + [elementId, element_name, selectNodeId, eid].join("', '") + "')";

    return A({

        'class': 'handle',

        'href': jscall,

        'title': _("cancel this insert")

    },

    '[x]');

}

function buildEntityLine(relationName, selectedOptionNode, comboId, eid) {

    // textContent doesn't seem to work on selectedOptionNode

    var content = selectedOptionNode.firstChild.nodeValue;

    var handle = buildPendingInsertHandle(selectedOptionNode.id, 'tr', comboId, eid);

    var link = A({

        'href': 'view?rql=' + selectedOptionNode.value,

        'class': 'editionPending',

        'id': 'a' + selectedOptionNode.id

    },

    content);

    var tr = TR({

        'id': 'tr' + selectedOptionNode.id

    },

    [TH(null, relationName), TD(null, [handle, link])]);

    try {

        var separator = getNode('relationSelectorRow_' + eid);

        //dump('relationSelectorRow_' + eid) XXX warn dump is not implemented in konqueror (at least)

        // XXX Warning: separator.parentNode is not (always ?) the

        // table itself, but an intermediate node (TableSectionElement)

        var tableBody = separator.parentNode;

        tableBody.insertBefore(tr, separator);

    } catch(ex) {

        log("got exception(2)!" + ex);

    }

}

function buildEntityCell(relationName, selectedOptionNode, comboId, eid) {

    var handle = buildPendingInsertHandle(selectedOptionNode.id, 'div_insert_', comboId, eid);

    var link = A({

        'href': 'view?rql=' + selectedOptionNode.value,

        'class': 'editionPending',

        'id': 'a' + selectedOptionNode.id

    },

    content);

    var div = DIV({

        'id': 'div_insert_' + selectedOptionNode.id

    },

    [handle, link]);

    try {

        var td = jQuery('#cell' + relationName + '_' + eid);

        td.appendChild(div);

    } catch(ex) {

        alert("got exception(3)!" + ex);

    }

}

function addPendingInsert(optionNode, eid, cell, relname) {

    var value = jQuery(optionNode).attr('value');

    if (!value) {

        // occurs when the first element in the box is selected (which is not

        // an entity but the combobox title)

        return;

    }

    // 2nd special case

    if (value.indexOf('http') == 0) {

        document.location = value;

        return;

    }

    // add hidden parameter

    var entityForm = jQuery('#entityForm');

    var oid = optionNode.id.substring(2); // option id is prefixed by "id"

    remoteExec('add_pending_inserts', [oid.split(':')]);

    var selectNode = optionNode.parentNode;

    // remove option node

    selectNode.removeChild(optionNode);

    // add line in table

    if (cell) {

        // new relation as a cell in multiple edit

        // var relation_name = relationSelected.getAttribute('value');

        // relation_name = relation_name.slice(0, relation_name.lastIndexOf('_'));

        buildEntityCell(relname, optionNode, selectNode.id, eid);

    }

    else {

        var relationSelector = getNode('relationSelector_' + eid);

        var relationSelected = relationSelector.options[relationSelector.selectedIndex];

        // new relation as a line in simple edit

        buildEntityLine(relationSelected.text, optionNode, selectNode.id, eid);

    }

}

function cancelPendingInsert(elementId, element_name, comboId, eid) {

    // remove matching insert element

    var entityView = jqNode('a' + elementId).text();

    jqNode(element_name + elementId).remove();

    if (comboId) {

        // re-insert option in combobox if it was taken from there

        var selectNode = getNode(comboId);

        // XXX what on object relation

        if (selectNode) {

            var options = selectNode.options;

            var node_id = elementId.substring(0, elementId.indexOf(':'));

            options[options.length] = OPTION({

                'id': elementId,

                'value': node_id

            },

            entityView);

        }

    }

    elementId = elementId.substring(2, elementId.length);

    remoteExec('remove_pending_insert', elementId.split(':'));

}

/**

 * .. function:: buildPendingDeleteHandle(elementId, eid)

 *

 * this function builds a Handle to cancel pending insertion

 */

function buildPendingDeleteHandle(elementId, eid) {

    var jscall = "javascript: addPendingDelete('" + elementId + ', ' + eid + "');";

    return A({

        'href': jscall,

        'class': 'pendingDeleteHandle',

        'title': _("delete this relation")

    },

    '[x]');

}

/**

 * .. function:: addPendingDelete(nodeId, eid)

 *

 * * `nodeId`, eid_from:r_type:eid_to

 */

function addPendingDelete(nodeId, eid) {

    var d = loadRemote('json', ajaxFuncArgs('add_pending_delete', null, nodeId.split(':')));

    d.addCallback(function() {

        // and strike entity view

        jqNode('span' + nodeId).addClass('pendingDelete');

        // replace handle text

        jqNode('handle' + nodeId).text('+');

    });

}

/**

 * .. function:: cancelPendingDelete(nodeId, eid)

 *

 * * `nodeId`, eid_from:r_type:eid_to

 */

function cancelPendingDelete(nodeId, eid) {

    var d = loadRemote('json', ajaxFuncArgs('remove_pending_delete', null, nodeId.split(':')));

    d.addCallback(function() {

        // reset link's CSS class

        jqNode('span' + nodeId).removeClass('pendingDelete');

        // replace handle text

        jqNode('handle' + nodeId).text('x');

    });

}

/**

 * .. function:: togglePendingDelete(nodeId, eid)

 *

 * * `nodeId`, eid_from:r_type:eid_to

 */

function togglePendingDelete(nodeId, eid) {

    // node found means we should cancel deletion

    if (jQuery.className.has(getNode('span' + nodeId), 'pendingDelete')) {

        cancelPendingDelete(nodeId, eid);

    } else {

        addPendingDelete(nodeId, eid);

    }

}

function selectForAssociation(tripletIdsString, originalEid) {

    var tripletlist = map(function(x) {

        return x.split(':');

    },

    tripletIdsString.split('-'));

    var d = loadRemote('json', ajaxFuncArgs('add_pending_inserts', null, tripletlist));

    d.addCallback(function() {

        var args = {

            vid: 'edition',

            __mode: 'normal',

            rql: rql_for_eid(originalEid)

        };

        document.location = 'view?' + asURL(args);

    });

}

function updateInlinedEntitiesCounters(rtype, role) {

    jQuery('div.inline-' + rtype + '-' + role + '-slot span.icounter').each(function(i) {

        this.innerHTML = i + 1;

    });

}

/**

 * .. function:: addInlineCreationForm(peid, petype, ttype, rtype, role, i18nctx, insertBefore)

 *

 * makes an AJAX request to get an inline-creation view's content

 * * `peid`, the parent entity eid

 *

 * * `petype`, the parent entity type

 *

 * * `ttype`, the target (inlined) entity type

 *

 * * `rtype`, the relation type between both entities

 */

function addInlineCreationForm(peid, petype, ttype, rtype, role, i18nctx, insertBefore) {

    insertBefore = insertBefore || getNode('add' + rtype + ':' + peid + 'link').parentNode;

    var args = ajaxFuncArgs('inline_creation_form', null, peid, petype, ttype, rtype, role, i18nctx);

    var d = loadRemote('json', args);

    d.addCallback(function(response) {

        var dom = getDomFromResponse(response);

        preprocessAjaxLoad(null, dom);

        var form = jQuery(dom);

        form.css('display', 'none');

        form.insertBefore(insertBefore).slideDown('fast');

        updateInlinedEntitiesCounters(rtype, role);

        reorderTabindex(null, $(insertBefore).closest('form')[0]);

        jQuery(CubicWeb).trigger('inlinedform-added', form);

        // if the inlined form contains a file input, we must force

        // the form enctype to multipart/form-data

        if (form.find('input:file').length) {

            // NOTE: IE doesn't support dynamic enctype modification, we have

            //       to set encoding too.

            form.closest('form').attr('enctype', 'multipart/form-data').attr('encoding', 'multipart/form-data');

        }

        postAjaxLoad(dom);

    });

    d.addErrback(function(xxx) {

        log('xxx =', xxx);

    });

}

/**

 * .. function:: removeInlineForm(peid, rtype, role, eid, showaddnewlink)

 *

 * removes the part of the form used to edit an inlined entity

 */

function removeInlineForm(peid, rtype, role, eid, showaddnewlink) {

    jqNode(['div', peid, rtype, eid].join('-')).slideUp('fast', function() {

        $(this).remove();

        updateInlinedEntitiesCounters(rtype, role);

    });

    if (showaddnewlink) {

        toggleVisibility(showaddnewlink);

    }

}

/**

 * .. function:: removeInlinedEntity(peid, rtype, eid)

 *

 * alternatively adds or removes the hidden input that make the

 * edition of the relation `rtype` possible between `peid` and `eid`

 * * `peid`, the parent entity eid