/* global $ MBImport */
'use strict';
var meta = function() {
// ==UserScript==
// @name         Import DG/Decca releases to MusicBrainz
// @namespace    https://github.com/murdos/musicbrainz-userscripts
// @author       loujine
// @version      2016.11.13.1
// @downloadURL  https://raw.githubusercontent.com/murdos/musicbrainz-userscripts/master/dgdecca_importer.user.js
// @updateURL    https://raw.githubusercontent.com/murdos/musicbrainz-userscripts/master/dgdecca_importer.user.js
// @icon         https://raw.githubusercontent.com/murdos/musicbrainz-userscripts/master/assets/images/Musicbrainz_import_logo.png
// @description  Add a button to import DG/Decca releases to MusicBrainz
// @compatible   firefox+greasemonkey
// @licence      CC BY-NC-SA 3.0 (https://creativecommons.org/licenses/by-nc-sa/3.0/)
// @include      http*://*deutschegrammophon.com/*/cat/*
// @include      http*://*deccaclassics.com/*/cat/*
// @require      lib/mbimport.js
// @require      lib/mbimportstyle.js
// @grant        none
// @run-at       document-end
// ==/UserScript==
};
if (meta && meta.toString && (meta = meta.toString())) {
    var meta = {'name': meta.match(/@name\s+(.+)/)[1],
                'version': meta.match(/@version\s+(.+)/)[1]};
}

var siteURL = document.URL.split('/')[2].replace('www.', '');

var months = {
    'Jan.': 1, 'Feb.': 2, 'Mar.': 3, 'Apr.': 4,
    'May': 5, 'Jun.': 6, 'Jul.': 7, 'Aug.': 8,
    'Sep.': 9, 'Oct.': 10, 'Nov.': 11, 'Dec.': 12
};
var labels = {
    'deutschegrammophon.com': {
        'name': 'Deutsche Grammophon',
        'mbid': '5a584032-dcef-41bb-9f8b-19540116fb1c',
        'catno': document.URL.split('/')[5]
    },
    'deccaclassics.com': {
        'name': 'Decca Classics',
        'mbid': '89a9993d-1dad-4445-a3d7-1d8df04f7e7b',
        'catno': document.URL.split('/')[5]
    }
}

var editNote = ('Imported from '
                + document.URL
                + '\n —\n'
                + 'GM script: "' + meta.name + '" (' + meta.version + ')\n\n');

function _clean(s) {
    return s
        .replace(' In ', ' in ')
        .replace('Minor', 'minor')
        .replace('Major', 'major')
        .replace('Op.', 'op. ')
        .replace('No.', 'no. ')
        .replace(' Flat', '-flat')
        .replace(' flat', '-flat')
        .replace(' Sharp', '-sharp')
        .replace(' sharp', '-sharp')
        .replace('1. ', 'I. ')
        .replace('2. ', 'II. ')
        .replace('3. ', 'III. ')
        .replace('4. ', 'IV. ')
        .replace('5. ', 'V. ')
        .replace('6. ', 'VI. ')
        .replace('7. ', 'VII. ')
        .replace('8. ', 'VIII. ')
        .replace('9. ', 'IX. ')
        .replace('10. ', 'X. ')
        .replace(' - ', ': ')
        .replace(' | ', ': ')
        .replace('K.', 'K. ') // Mozart
        .replace('S.', 'S. ') // Liszt
    ;
}

function extract_release_data() {
    console.log('extract_release_data');

    function _setTitle() {
        var title = $('h4')[0].textContent;
        if ($('div.works').length) {
            title += ' ' + $('div.works')[0].innerHTML.replace(/<br><br>/g, ' / ').replace(/<br>/g, ' ');
        }
        return title;
    }
    function _setReleasePerformers() {
        var list = $('div.artists')[0].innerHTML.split('<br>').map(function (artist) {
            return {
                'credited_name': artist,
                'artist_name': artist,
                'artist_mbid': '',
                'joinphrase': ', '
            };
        });
        list[list.length - 1]['joinphrase'] = '';
        return list;
    }

    function _setReleaseArtists() {
        var composer = document.getElementsByTagName('h4')[0].textContent;
        var list = [{
            'credited_name': composer,
            'artist_name': composer,
            'artist_mbid': '',
            'joinphrase': '; '
        }];
        return list.concat(_setReleasePerformers());
    }

    function _indices(array, element) {
        var indices = [];
        var idx = array.indexOf(element);
        while (idx != -1) {
            indices.push(idx);
            idx = array.indexOf(element, idx + 1);
        }
        return indices;
    }

    var date = document.getElementsByClassName('date')[0].textContent;
    date = date.replace('Int. Release ', '').split(' ');
    var nodes = [];
    var tracklist_node = document.getElementById('tracklist');

    $('.item,.hier0,.hier1,.hier2,.hier3').each(function (idx, node) {
        var idx;
        var d = {};
        if (node.classList.contains('hier0')) {
            d['level'] = 0;
        } else if (node.classList.contains('hier1')) {
            d['level'] = 1;
        } else if (node.classList.contains('hier2')) {
            d['level'] = 2;
        } else if (node.classList.contains('hier3')) {
            d['level'] = 3;
        }
        if (node.parentElement.classList.contains('track-container')) {
            d['type'] = 'track';
        } else if (node.parentElement.classList.contains('work-container')) {
            d['type'] = 'work';
        } else if (node.parentElement.classList.contains('artists-container')) {
            d['type'] = 'artist';
        } else {
            d['type'] = 'medium';
        }
        d['title'] = node.textContent;
        d['node'] = node.parentElement;
        nodes.push(d);
    });
    console.log(nodes, tracklist_node);

    // complete track titles
    var header0, header1, header2, idx;
    nodes.forEach(function (node, idx) {
        var level = node['level'],
            type = node['type'],
            content = node['title'];
        if (type === 'work') {
            if (level === 0) {
                header0 = content;
            } else if (level === 1) {
                header1 = content;
            } else if (level === 2) {
                header2 = content;
            }
        } else if (type === 'track') {
            if (level === 0) {
                nodes[idx]['title'] = content;
            } else if (level === 1) {
                nodes[idx]['title'] = header0 + ': ' + content;
            } else if (level === 2) {
                nodes[idx]['title'] = header0 + ', ' + header1 + ': ' + content;
            } else if (level === 3) {
                nodes[idx]['title'] = header0 + ', ' + header1 + ', ' + header2 + ': ' + content;
            }
        }
    });

    var discs = [],
        tracks = [],
        medium_title = '';
    nodes.forEach(function (item, idx) {
        if (item.type === 'track') {
            var track = extract_track_data(item.node);
            track.title = _clean(item.title);
            tracks.push(track);
        }
        if (item.type === 'medium') {
            if (idx > 0) {
                discs.push({
                    'title': '', // medium_title,
                    'format': 'CD',
                    'tracks': tracks
                });
            }
            medium_title = item.title;
            tracks = [];
        }
    });
    // push last medium
    discs.push({
        'title': '', // nodes[0].title,
        'format': 'CD',
        'tracks': tracks
    });

    return {
        'title': _setTitle(),
        'artist_credit': _setReleaseArtists(),
        'type': 'Album',
        'status': 'Official',
        'language': 'eng', // 'English',
        'script': 'Latn', // 'Latin',
        'packaging': '',
        'country': '',
        'year': date[2],
        'month': months[date[1]],
        'day': date[0],
        'labels': [labels[siteURL]],
        'barcode': document.getElementById('upc').value.replace('00', ''), // too many 0s
        'urls': [{
            'link_type': 288, // 'discography'
            'url': document.URL
        }],
        'discs': discs
    };
}



function extract_track_data(node) {
    function _setTrackArtists(artistString) {
        console.log('artistString', artistString);
        var artists;
        if (artistString.includes(' | ')) {
            artists = artistString.split(' | ').map(function (artist) {
                return {
                    'credited_name': artist.split(',')[0],
                    'artist_name': artist.split(',')[0],
                    'artist_mbid': '',
                    'joinphrase': ', '
                };
            });
        } else {
            artists = artistString.split(', ').map(function (artist, idx) {
                var mbid = '';
                var url = '/ws/js/artist/?q=' + artist + '&fmt=json&limit=1';
                return {
                    'credited_name': artist,
                    'artist_name': artist,
                    'artist_mbid': mbid,
                    'joinphrase': ', '
                };
            });
        }
        artists[artists.length - 1]['joinphrase'] = '';
        return artists
    }

    var schema = {};
    if (node.querySelectorAll('meta').length) {
        // https://schema.org/MusicRecording info available
        for (var item of node.querySelectorAll('meta')) {
            var attrs = item.attributes;
            schema[attrs.itemprop.value] = attrs.content.value;
        }
    } else {
        console.log('no meta data on ', node);
        schema.name = node.querySelectorAll('div.track-text > a.fancy')[0].textContent;
        schema.byArtist = $(node).parent().nextAll('div.container-container').children('.artists-container')[0].textContent;
        var previousComposers = $(node).parent().prevAll('div.container-container').children('.first-composer-container');
        schema.creator = previousComposers[previousComposers.length-1].textContent;
    }
    console.info('schema', schema);
    return {
        'number': parseInt(node.querySelectorAll('div.track-no')[0].textContent),
        'title': _clean(schema.name),
        'duration': node.querySelectorAll('div.track-time')[0].textContent,
        'artist_credit': _setTrackArtists(schema.byArtist), // CSG
        'performer': schema.byArtist,
        'composer': schema.creator,
        'url': node.querySelectorAll('div.track-text > a.fancy')[0].href
    };
}


// Insert links in page
function insertMBSection(release) {
    var mbUI = $('<div class="section musicbrainz"><h3>MusicBrainz</h3></div>');
    var mbContentBlock = $('<div class="section_content"></div>');
    mbUI.append(mbContentBlock);

    // Form parameters
    var parameters = MBImport.buildFormParameters(release, editNote);

    // Build form + search button
    var innerHTML = '<div id="mb_buttons">'
      + MBImport.buildFormHTML(parameters)
      + MBImport.buildSearchButton(release)
      + '</div>';
    mbContentBlock.append(innerHTML);

    $('div#product-text').append(mbUI[0]);

    $('#mb_buttons').css({
      display: 'inline-block',
      width: '100%'
    });
    $('form.musicbrainz_import').css({width: '49%', display: 'inline-block'});
    $('form.musicbrainz_import_search').css({'float': 'right'})
    $('form.musicbrainz_import > button').css(
        {width: '100%', 'box-sizing': 'border-box'}
    );

    mbUI.slideDown();
}

try {
    var release = extract_release_data();
    insertMBSection(release);
} catch (e) {
    console.log(e);
    throw e;
}