var should   = require('should/as-function');
var Album    = require('../../src/model/album');
var fixtures = require('../fixtures');

describe('Album', function() {

  describe('options', function() {

    it('can pass the title as a single argument', function() {
      var a = new Album('Holidays');
      should(a.title).eql('Holidays');
    });

    it('can pass a full hash of options', function() {
      var a = new Album({id: 12, title: 'Holidays'});
      should(a.id).eql(12);
      should(a.title).eql('Holidays');
    });

  });

  describe('output paths', function() {

    it('sanitises album titles for the file name', function() {
      var a = new Album('hello & world');
      should(a.filename).eql('helloworld');
    });

    it('concatenates nested filenames for uniqueness', function() {
      // to avoid having two nested albums called "October" overwrite each other
      // note: doesn't use the root title to avoid "home-" or "index-"
      var root = new Album({
        title: 'home',
        albums: [
          new Album({
            title: '2010',
            albums: [
              new Album({title: 'October'})
            ]
          }),
          new Album({
            title: '2011',
            albums: [
              new Album({title: 'October'})
            ]
          }),
        ]
      });
      root.finalize();
      should(root.albums[0].albums[0].filename).eql('2010-October');
      should(root.albums[1].albums[0].filename).eql('2011-October');
    });

  });

  describe('previews', function() {

    it('picks the first 10 files as previews', function() {
      var a = new Album({files: [
        fixtures.photo(), fixtures.photo(), fixtures.photo(), fixtures.photo(),
        fixtures.photo(), fixtures.photo(), fixtures.photo(), fixtures.photo(),
        fixtures.photo(), fixtures.photo(), fixtures.photo(), fixtures.photo(),
      ]});
      a.finalize();
      should(a.previews).have.length(10);
    });

    it('adds <missing> thumbnails to fill', function() {
      var a = new Album({files: [
        fixtures.photo(), fixtures.photo(),
      ]});
      a.finalize();
      should(a.previews[2].urls.thumb).eql('public/missing.png');
      should(a.previews[9].urls.thumb).eql('public/missing.png');
    });

    it('uses files from nested albums too', function() {
      var a = new Album({
        title: 'a',
        albums: [
          new Album({
            title: 'b',
            files: [fixtures.photo(), fixtures.photo()]
          }),
          new Album({
            title: 'c',
            files: [fixtures.photo(), fixtures.photo()]
          })
        ]
      });
      a.finalize();
      should(a.previews).have.length(10);
      for (var i = 0; i < 4; ++i) {
        should(a.previews[i].urls.thumb).not.eql('public/missing.png');
      }
    });

  });

  describe('sorting', function() {

    it('can sort albums by title', function() {
      var a = new Album('A');
      var b = new Album('B');
      var c = new Album('C');
      var root = new Album({albums: [c, a, b]});
      root.finalize({sortAlbumsBy: 'title'});
      should(root.albums).eql([a, b, c]);
    });

    it('can sort albums by start date', function() {
      var startJan = albumWithFileDates(['2010-01-01', '2010-05-01']);
      var startFeb = albumWithFileDates(['2010-02-01', '2010-04-01']);
      var startMar = albumWithFileDates(['2010-03-01', '2010-03-01']);
      var root = new Album({albums: [startFeb, startMar, startJan]});
      root.finalize({sortAlbumsBy: 'start-date'});
      should(root.albums).eql([startJan, startFeb, startMar]);
    });

    it('can sort albums by end date', function() {
      var endMay = albumWithFileDates(['2010-01-01', '2010-05-01']);
      var endApr = albumWithFileDates(['2010-02-01', '2010-04-01']);
      var endMar = albumWithFileDates(['2010-03-01', '2010-03-01']);
      var root = new Album({albums: [endMay, endMar, endApr]});
      root.finalize({sortAlbumsBy: 'end-date'});
      should(root.albums).eql([endMar, endApr, endMay]);
    });

    it('can sort media by filename', function() {
      var a = fixtures.photo({path: 'a'});
      var b = fixtures.photo({path: 'b'});
      var c = fixtures.photo({path: 'c'});
      var album = new Album({files: [c, a, b]});
      album.finalize({sortMediaBy: 'filename'});
      should(album.files).eql([a, b, c]);
    });

    it('can sort media by reverse filename', function() {
      var a = fixtures.photo({path: 'a'});
      var b = fixtures.photo({path: 'b'});
      var c = fixtures.photo({path: 'c'});
      var album = new Album({files: [c, a, b]});
      album.finalize({sortMediaBy: 'filename', sortMediaDirection: 'desc'});
      should(album.files).eql([c, b, a]);
    });

    it('sorts nested albums too', function() {
      var nested = new Album({title: 'nested', files: [
        fixtures.photo({path: 'b'}),
        fixtures.photo({path: 'a'}),
      ]});
      var root = new Album({title: 'home', albums: [nested]});
      root.finalize({sortMediaBy: 'filename'});
      should(nested.files[0].filepath).eql('a');
      should(nested.files[1].filepath).eql('b');
    });

  });

  describe('nested albums basic logic', function() {

    it('calculates the depth of every album', function() {
      var a = new Album('single');
      var b = new Album('single');
      var c = new Album('single');
      var d = new Album('single');
      a.albums = [b, c];
      c.albums = [d];
      a.finalize();
      should(a.depth).eql(0);
      should(b.depth).eql(1);
      should(c.depth).eql(1);
      should(d.depth).eql(2);
    });

    it('sets the home flag on the top-level album', function() {
      var a = new Album('single');
      var b = new Album('single');
      var c = new Album('single');
      var d = new Album('single');
      a.albums = [b, c];
      c.albums = [d];
      a.finalize();
      should(a.home).eql(true);
      should(b.home).eql(false);
      should(c.home).eql(false);
      should(d.home).eql(false);
    });

    it('passes finalising options to all nested albums (e.g. sorting)', function() {
      var nested = new Album({title: 'nested', files: [
        fixtures.photo({path: 'b'}),
        fixtures.photo({path: 'a'}),
      ]});
      var root = new Album({title: 'home', albums: [nested]});
      root.finalize({sortMediaBy: 'filename'});
      should(nested.files[0].filepath).eql('a');
      should(nested.files[1].filepath).eql('b');
    });

  });

});


function albumWithFileDates(dates) {
  var files = dates.map(function(d) {
    return fixtures.photo({date: d});
  });
  return new Album({files: files});
}