// ==UserScript==
// @name        Import Metal Archives releases into MusicBrainz
// @namespace   https://github.com/murdos/musicbrainz-userscripts/
// @version     2018.2.18.1
// @description Add a button on Metal Archives release pages allowing to open MusicBrainz release editor with pre-filled data for the selected release
// @downloadURL https://raw.github.com/murdos/musicbrainz-userscripts/master/metalarchives_importer.user.js
// @update      https://raw.github.com/murdos/musicbrainz-userscripts/master/metalarchives_importer.user.js
// @include     http*://www.metal-archives.com/albums/*/*/*
// @require     https://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.js
// @require     lib/mbimport.js
// @require     lib/mbimportstyle.js
// @require     lib/logger.js
// @icon        https://raw.githubusercontent.com/murdos/musicbrainz-userscripts/master/assets/images/Musicbrainz_import_logo.png
// ==/UserScript==

// prevent JQuery conflicts, see http://wiki.greasespot.net/@grant
this.$ = this.jQuery = jQuery.noConflict(true);

$(document).ready(function() {
    MBImportStyle();

    let release_url = window.location.href.replace('/?.*$/', '').replace(/#.*$/, '');
    let release = retrieveReleaseInfo(release_url);
    insertLink(release, release_url);
    LOGGER.info('Parsed release: ', release);
});

function setreleasedate(release, datestring) {
    if (/^\d{4}$/.exec(datestring)) {
        release.year = datestring;
    } else if (datestring.indexOf(',') != -1) {
        let commaindex = datestring.indexOf(',');
        var d = new Date(datestring.substring(0, commaindex - 2) + datestring.substring(commaindex));
        release.year = d.getFullYear();
        release.month = d.getMonth() + 1;
        release.day = d.getDate();
    } else {
        var d = new Date(`2 ${datestring}`);
        release.year = d.getFullYear();
        release.month = d.getMonth() + 1;
    }
    return release;
}

function getGenericalData() {
    let rdata = new Array();
    let keydata = $('dl.float_left dt, dl.float_right dt')
        .map(function() {
            let s = $.trim($(this).text());
            return s.substring(0, s.length - 1);
        })
        .get();
    let valuedata = $('dl.float_left dd,dl.float_right dd')
        .map(function() {
            return $.trim($(this).text());
        })
        .get();
    for (i = 0; i < keydata.length; i++) {
        rdata[keydata[i]] = valuedata[i];
    }
    return rdata;
}

function getArtistsList() {
    return $.map(
        $('h2.band_name')
            .text()
            .split('/'),
        $.trim
    );
}

function retrieveReleaseInfo(release_url) {
    let release = {
        discs: [],
        artist_credit: [],
        title: '',
        year: 0,
        month: 0,
        day: 0,
        parent_album_url: '',
        labels: [],
        format: '',
        country: '',
        type: '',
        status: 'official',
        packaging: '',
        language: '',
        script: '',
        urls: []
    };

    let rdata = getGenericalData();
    let artists = getArtistsList();
    let joinphrase = '';
    if (artists.length > 1) {
        if (rdata['Type'] == 'Split') {
            joinphrase = ' / ';
        } else {
            joinphrase = ' & ';
        }
    }
    for (let i = 0; i < artists.length; i++) {
        release.artist_credit.push({
            artist_name: artists[i],
            credited_name: artists[i],
            joinphrase: i != artists.length - 1 ? joinphrase : ''
        });
    }
    release.title = $('h1.album_name').text();

    release = setreleasedate(release, rdata['Release date']);
    if ('Label' in rdata) {
        // TODO: add case for multiple labels if such a case exist
        let label = rdata['Label'];
        let label_mbid = '';
        if (label == 'Independent') {
            label = '[no label]';
            label_mbid = '157afde4-4bf5-4039-8ad2-5a15acc85176';
        }
        let catno = rdata['Catalog ID'];
        if (catno == undefined || catno == 'N/A') {
            catno = '';
        }
        release.labels.push({
            name: label,
            catno: catno,
            mbid: label_mbid
        });
    }

    if (rdata['Type'] in ReleaseTypes) {
        let types = ReleaseTypes[rdata['Type']];
        release.type = types[0];
        // NOTE: secondary type may not be selected on MB editor, but it still works, a bug on MB side
        release.secondary_types = types.slice(1);
    }

    // FIXME: multiple vinyls ie. http://www.metal-archives.com/albums/Reverend_Bizarre/III%3A_So_Long_Suckers/415313
    if (rdata['Format'] in ReleaseFormat) {
        release.format = ReleaseFormat[rdata['Format']];
    }

    if ('Version desc.' in rdata) {
        if (rdata['Version desc.'].indexOf('Digipak') != -1) {
            release.packaging = 'Digipak';
        }
        if (release.format == 'CD' && rdata['Version desc.'] == 'CD-R') {
            release.format = 'CD-R';
        }
    }

    let identifiers = $('#album_tabs_notes > div:nth-child(2)')
        .find('p:not([class])')
        .contents();
    for (let j = 0; j < identifiers.length; j++) {
        if (identifiers[j].textContent.indexOf('Barcode:') != -1) {
            release.barcode = $.trim(identifiers[j].textContent.substring(8));
            break;
        }
    }

    // URLs
    let link_type = MBImport.URL_TYPES;
    release.urls.push({
        url: release_url,
        link_type: link_type.other_databases
    });

    let releaseNumber = 0;
    let disc = {
        tracks: [],
        format: release.format
    };
    release.discs.push(disc);

    let tracksline = $('table.table_lyrics tr.even,table.table_lyrics tr.odd');

    tracksline.each(function(index, element) {
        let trackNumber = $.trim(element.children[0].textContent).replace('.', '');
        if (trackNumber == '1' && trackNumber != index + 1) {
            releaseNumber++;
            release.discs.push({
                tracks: [],
                format: release.format
            });
        }

        // TODO: handling of split and compilation artists (artist - title)
        let track = {
            number: trackNumber,
            title: $.trim(element.children[1].textContent.replace(/\s+/g, ' ')),
            duration: $.trim(element.children[2].textContent),
            artist_credit: [release.artist_credit]
        };
        release.discs[releaseNumber].tracks.push(track);
    });
    return release;
}

// Insert button into page under label information
function insertLink(release, release_url) {
    let edit_note = MBImport.makeEditNote(release_url, 'Metal Archives');
    let parameters = MBImport.buildFormParameters(release, edit_note);

    let mbUI = $(`<div id="musicbrainz-import">${MBImport.buildFormHTML(parameters)}${MBImport.buildSearchButton(release)}</div>`).hide();

    $('h2.band_name').after(mbUI);
    $('#musicbrainz-import form').css({
        padding: '0'
    });
    $('form.musicbrainz_import').css({
        display: 'inline-block',
        margin: '1px'
    });
    $('form.musicbrainz_import img').css({
        display: 'inline-block'
    });

    mbUI.slideDown();
}

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//                                   Metal Archives -> MusicBrainz mapping                                                   //
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/*
release.type 	primary type release 	secondary release type
on MA				on MB

Full-length 		Album				Compilation
Live album			Single				Demo
Demo				EP					DJ-mix
Single				Broadcast			Interview
EP					Other				Live
Video									Audiobook
Boxed set								Mixtape/Street
Split									Remix
Video/VHS (legacy)						Soundtrack
Compilation								Spokenword
Split video
*/

//ReleaseTypes[MAtype]=["primary type","secondary type on mb"];
var ReleaseTypes = {
    'Full-length': ['album'],
    'Live album': ['album', 'live'],
    Demo: ['album', 'demo'],
    Single: ['single'],
    EP: ['ep'],
    Compilation: ['album', 'compilation'],
    Split: ['album'],
    Collaboration: ['']
};

//ReleaseFormat[MAformat]="MBformat";
var ReleaseFormat = {
    CD: 'CD',
    '2CD': 'CD',
    Vinyl: 'Vinyl',
    '7" vinyl': '7" Vinyl',
    '7" vinyl (33⅓ RPM)': '7" Vinyl',
    '10" vinyl (33⅓ RPM)': '10" Vinyl',
    '10" vinyl': '10" Vinyl',
    '12" vinyl': '12" Vinyl',
    '2 12" vinyls': '12" Vinyl',
    '12" vinyl (33⅓ RPM)': '12" Vinyl',
    Cassette: 'Cassette',
    Digital: 'Digital Media'
};