/* jshint maxerr: 3000 */

/*

This script will place a button at the top of any NRHP county/state list that when clicked on will check and automatically fix

the ordering of the numbers in the first column of the NRHP table. If no reordering is needed, a null edit will be performed.

This is useful when a property has been added to or removed from the list, causing all rows below it to be off by one.

*/

function RenumberButton() {

   if (mw.config.get('wgNamespaceNumber')!==0) { /* only main namespace */

        return;

    }

    if (location.href.indexOf('action')!=-1||location.href.indexOf('Talk:')!=-1) return; /* talk page, or editing the page */



    if (mw.config.get('wgPageName').search("National_Register_of_Historic_Places_listings_in")===-1 &&

    	mw.config.get('wgPageName').search("National_Register_of_Historic_Places_listings_on")===-1 &&

    	mw.config.get('wgPageName').search("National_Historic_Landmarks_in")===-1) {

		return;    		

    }

    

    

    var content=document.getElementById('mw-content-text');



    //look to see if button is already here

    var button = document.getElementById('mw-nrhp-renumber-button');

    var needsButton = false;

    if (button === null) {

    	// no such element

    	needsButton = true;

    } else if (!button.hasAttributes || !button.hasAttribute("class")) {

    	needsButton = true;

    } else if (button.getAttribute("class") !== "NRHPRenumberButton") {

    	needsButton = true;

    }

    

    if (!needsButton) return;

    

    button=document.createElement("input");

    button.setAttribute("type", "button");

    button.setAttribute("class","NRHPRenumberButton");

    button.setAttribute("onclick", "RenumberClick()");

    button.id = 'mw-nrhp-renumber-button';



    content.parentNode.insertBefore(button, content);

    console.log('Reorder NRHP button ready');

    ButtonState(false);

}



function ButtonState(isDisabled) {

    var button = document.getElementById('mw-nrhp-renumber-button');

    button.disabled = isDisabled;

	if (isDisabled) {

		button.value = "Working...";

	} else {

		button.value = "Renumber list";

	}

}



function RenumberClick() {

	ButtonState(true);

    getListWikitext(mw.config.get('wgPageName'));

}



function getListWikitext(title) {

    $.ajax({

        dataType: "json",

        url: mw.util.wikiScript('api'),

        data: {

            format: 'json',

            action: 'query',

            prop: 'revisions',

            rvprop: 'content',

            rvslots: 'main',

            titles: title,

            indexpageids: true,

            redirects: 'true'

        },

        success: function (data, status, xhr) {

        	var response = xhr.responseText;

//        	console.log("ReorderNRHPlist: response to initial fetch: "+response);

        	var output = JSON.parse(response);

        	var wikitext = "error";

        	var id;

        	

		    for (var page in output.query.pageids) {

		    	id = output.query.pageidspage];

	        	console.log('ReorderNRHPlist: response pageid = '+id);

		        wikitext = output.query.pagesid].revisions0].slots.main'*'];

		    }

            RenumberList(wikitext);

        },

        error: function(ArticlejsonObject) {

        	console.log('ReorderNRHPlist: Error fetching title '+title);

            alert('Could not get wikitext; failure.');

            ButtonState(false);

        }

    });

}



function RenumberList(wikitext) {

    var splittext = wikitext.split("|}");



    var newwikitext = '';

    var i, j, k, l, str, skip, StartIndex;

    var index, RowLocations = [];

    for (j=0; j<splittext.length-1; j++) {



        StartIndex = 0;

        str = "|pos=";

        skip = str.length;

        RowLocations = [];

        while ((index = splittextj].indexOf(str, StartIndex)) > -1) {

            RowLocations.push(index);

            StartIndex = index + skip;

        }



        var stop=RowLocations.length+1;

        var comments=splittextj].match(/<\!\-\-(.|[\r\n])*?\-\-\>/g);

        if (comments!==null) {

            for (l=0; l<comments.length; l++) {

                if (commentsl].indexOf(str)==-1) {comments.splice(l,1);l--}    // remove comments that don't include a row

            }

        }

        k = 0;

        for (i=1; i<stop; i++) {

            StartIndex = RowLocationsi-1+1;

            if (comments!==null && k<comments.length) {

            if (StartIndex>splittextj].indexOf(commentsk])&&StartIndex<splittextj].indexOf(commentsk])+commentsk].length) {

                k++;

                continue;

            }

            }

            str="|";

            var NextParam = splittextj].indexOf(str,StartIndex);

            var RowNum = i-k;

            splittextj = splittextj].substr(0,StartIndex-1)+"|pos="+RowNum+splittextj].substr(NextParam-1,splittextj].length-NextParam+1);



            StartIndex = 0;

            str = "|pos=";

            skip = str.length;

            RowLocations = [];

            while ((index = splittextj].indexOf(str, StartIndex)) > -1) {

                RowLocations.push(index);

                StartIndex = index + skip;

            }

        }

        newwikitext+=splittextj+"|}";

    }

    newwikitext+=splittextsplittext.length-1];

    editNRHPPage({

        title: mw.config.get('wgPageName'),

        text: newwikitext,

        summary: '[[User:Magicpiano/NRBot/ReorderNRHPlist.js|Semi-automated]] renumbering of list items after addition/deletion.'

    });

}



function editNRHPPage(info) {

	var edit_token = mw.user.tokens.get( 'editToken' );

	if (edit_token === null) {

		edit_token = mw.user.tokens.get('csrfToken');

	}

    $.ajax({

        url: mw.util.wikiScript( 'api' ),

        type: 'POST',

        dataType: 'json',

        async: true,

        data: {

            format: 'json',

            action: 'edit',

            title: info.title,

            text: info.text,

            summary: info.summary,

            token: edit_token

        },

        success: function( data ) {

            if (data && data. && data..result && data..result == 'Success') {

                alert("Success! Rows renumbered!");

            } else {

            	var msg;

            	if (data && data.error) {

            		msg = "Error editing page: ";

            		msg += " code=" + data.error.code;

            		msg += " info=" + data.error.info;

        		} else {

        			msg = "Error editing page (no data or error)";

        		}

                alert(msg);

            }

        },

        error: function() {

            alert('Error saving renumbered rows! Refresh the page to try again');

        },

        complete: function() {

        	ButtonState(false);

        }

    });

}



$.when($.ready).then(RenumberButton);