var metalsmith = require('metalsmith')
var layouts = require('metalsmith-layouts')
var markdown = require('metalsmith-markdown')
var collections = require('metalsmith-collections')
var pagination = require('metalsmith-pagination')
var paths = require('metalsmith-paths')
var filemetadata = require('metalsmith-filemetadata')
var matters = require('metalsmith-matters')

var fs = require('fs');
var moment = require('moment');

var handlebars = require('handlebars');
var hlayouts = require('handlebars-layouts');

handlebars.registerHelper(hlayouts(handlebars));
handlebars.registerPartial('base', fs.readFileSync('templates/base.hbs', 'utf8'));

handlebars.registerHelper('formatDate', function(date) {
    return moment(new Date(date)).format('MMMM D, YYYY HH:mm:ss');
});

handlebars.registerHelper('formatTimestamp', function(date) {
    return moment(date, 'X').format('MMMM D, YYYY HH:mm:ss');
});

function compareWith(v1, v2, operator) {
    var itm = false;
    
    switch (operator) {
        case '==':
            itm = (v1 == v2);
            break;
        case '!=':
            itm = (v1 != v2);
            break;
        case '===':
            itm = (v1 === v2);
            break;
        case '<':
            itm = (v1 < v2);
            break;
        case '<=':
            itm = (v1 <= v2);
            break;
        case '>':
            itm = (v1 > v2);
            break;
        case '>=':
            itm = (v1 >= v2);
            break;
    }
    return itm;
}

handlebars.registerHelper('eachCond', function(context, member, operator, cond, options) {
    var tot = '';
    for (var i = 0; i < context.length; i++) {
        var itm = false;
        var v1 = context[i][member];
        
        
        if (compareWith(v1, cond, operator)) {
            tot += options.fn(context[i]);
        }
    }
    return tot;
});

handlebars.registerHelper('ifCond', function (v1, operator, v2, options) {
    if (compareWith(v1, v2, operator)) {
        return options.fn(this);
    } else {
        return options.inverse(this);
    }
});

metalsmith(__dirname)
  .source('recettes')
  .metadata(require('./config/metadata'))
  .frontmatter(false)
  .use(matters(require('./config/matters')))
  .use(filemetadata(require('./config/filemetadata')))
  .use(collections(require('./config/collections')))
  .use(markdown(require('./config/markdown')))
  .use(pagination(require('./config/pagination')))
  .use(paths(require('./config/paths')))
  .use(layouts(require('./config/layouts')))
  .use(copyVendor())
  .destination('build')
  .build(function (err) {
    if (err) {
      throw err
    }
  })

function debugCollection() {
    return function(files, metalsmith, done) {
        console.log(files);
        for (var i in files) {
            console.log(i + ' -> ' + ' (' + files[i].collection + ')');
            console.log(files[i]);
        }
        return done();
    }
}

function debugMeta(metaname) {
    return function(files, metalsmith, done) {
        if (metaname !== undefined) {
            console.log(metalsmith.metadata()[metaname]);
        } else {
            console.log(metalsmith.metadata());
        }
        return done();
    }
}

function debugPagination() {
    return function(files, metalsmith, done) {
        
        for (var i in files) {
            var f = files[i];
            if (f !== undefined && f.path != undefined) {
                console.log(f.path);
            }
        }
        
        return done();
    }
}


function copyVendor() {
    
  return function(files, metalsmith, done){
    
    var bufferMoment = fs.readFileSync('styles/customHighlight.css');
    files['styles/customHighlight.css'] = {
      contents: bufferMoment
    };
    
    return done();
  };
}