// See also [[User:Atrian/monobook.js/unitformatter.js]] and [[User:Bobblewik/monobook.js/unitformatter.js]]

function formatunits() {
    var txt = document.editform.wpTextbox1;

    // Convert all ° into actual ° symbol
    txt.value = txt.value.replace(/°/g, '°');

    // Convert the word ohm(s) or the html entity into the actual Ω symbol (Omega, not the actual ohm symbol Ω) and make sure it's spaced
    txt.value = txt.value.replace(/(\d)\s?(Y|Z|E|P|T|G|M|k|K|h|da|d|c|m|µ|μ|µ|n|p|f|a|z|y)?(\s|-)?(Ω|ohm|Ohm)s?([\s,.])/g, '$1 $2Ω$5');

    // Convert various micro symbols into the actual micro symbol, make sure it's spaced
    txt.value = txt.value.replace(/(\d)\s?(μ|μ|µ)(g|s|m|A|K|mol|cd|rad|sr|Hz|N|J|W|Pa|lm|lx|C|V|Ω|F|Wb|T|H|S|Bq|Gy|Sv|kat|°C|M)([\s,.])/g, '$1 µ$3$4');

    // Convert capital K to lowercase k in units
    txt.value = txt.value.replace(/(\d)\s?K(g|s|m|A|K|mol|cd|rad|sr|Hz|N|J|W|Pa|lm|lx|C|V|Ω|F|Wb|T|H|S|Bq|Gy|Sv|kat|°C|M)([\s,.])/g, '$1 k$2$3');

    // Capitalize units correctly
    txt.value = txt.value.replace(/(\d)\s?(khz)([\s,.])/gi, '$1 kHz$3');
    txt.value = txt.value.replace(/(\d)\s?(mhz)([\s,.])/gi, '$1 MHz$3');
    txt.value = txt.value.replace(/(\d)\s?(ghz)([\s,.])/gi, '$1 GHz$3');
    txt.value = txt.value.replace(/(\d)\s?(Y|Z|E|P|T|G|M|k|K|h|da|d|c|m|µ|μ|µ|n|p|f|a|z|y)?(hz|HZ)([\s,.])/g, '$1 $2Hz$4');
    txt.value = txt.value.replace(/(\d)\s?(Y|Z|E|P|T|G|M|k|K|h|da|d|c|m|µ|μ|µ|n|p|f|a|z|y)?(pa|PA)([\s,.])/g, '$1 $2Pa$4');

    // Add a space before dB or B
    txt.value = txt.value.replace(/(\d)\s?(dB\w*)\b/g, '$1 $2');
    txt.value = txt.value.replace(/(\d)\s?B\b/g, '$1 B');

    // Add a space before any units that were missed before
    txt.value = txt.value.replace(/(\d)\s?(Y|Z|E|P|T|G|M|k|K|h|da|d|c|m|µ|n|p|f|a|z|y)?(g|m|A|K|mol|cd|rad|sr|Hz|N|J|W|Pa|lm|lx|C|V|Ω|F|Wb|T|H|S|Bq|Gy|Sv|kat|°C|M)([\s,.])/g, '$1 $2$3$4');

    // Separate one for seconds since they give a lot of false positives like "1970s".  Only difference is mandatory prefix.
    txt.value = txt.value.replace(/(\d)\s?(Y|Z|E|P|T|G|M|k|K|h|da|d|c|m|µ|n|p|f|a|z|y)(s)([\s,.])/g, '$1 $2$3$4');

    // bps or b/s or bits/s --> bit/s
    txt.value = txt.value.replace(/([KkMmGgTtPpEeYyZz])(bps|bits?\/s|b\/s)/g, '$1bit/s');

    // Bps or byte/s or bytes/s --> B/s
    txt.value = txt.value.replace(/([KkMmGgTtPpEeYyZz])(Bps|bytes?\/s)/g, '$1B/s');

    // After that, make capitalization correct
    txt.value = txt.value.replace(/K(bit|B)\/s/g, 'k$1/s');
    txt.value = txt.value.replace(/m(bit|B)\/s/g, 'M$1/s');
    txt.value = txt.value.replace(/g(bit|B)\/s/g, 'G$1/s');
    txt.value = txt.value.replace(/t(bit|B)\/s/g, 'T$1/s');
    txt.value = txt.value.replace(/e(bit|B)\/s/g, 'E$1/s');
    txt.value = txt.value.replace(/y(bit|B)\/s/g, 'Y$1/s');
    txt.value = txt.value.replace(/z(bit|B)\/s/g, 'Z$1/s');

    // Common error
    txt.value = txt.value.replace(/mibi(bit|byte)/g, 'mebi$1');

    // Add a tag to the summary box
    var txt = document.editform.wpSummary;
    var summary = "[[User:Omegatron#Regular expressions|Regex unit formatter]]";
	if (txt.value.indexOf(summary) == -1) {
		if (txt.value.match(/[^\*\/\s][^\/\s]?\s*$/)) {
			txt.value += " | ";
		}
		txt.value += summary;
	}

    // Press the diff button to check it
    document.editform.wpDiff.click()
}

$(function () {
    if(document.forms.editform) {
        mw.util.addPortletLink('p-cactions', 'javascript:formatunits()', 'µ', 'ca-unitfixer', 'Fixes some unit formatting', '', '');
    }
});