// Fancy widget initializations ------------------------

$(function() {
    var $specSelects = $('.-spec-select')
    
    var select2Options = {
        language: 'ru',
        //minimumInputLength: 1, // Commented out to immediately load remote data
        placeholder: '', // Required by `allowClear`
        allowClear: true,
        
        ajax: {
            url: '/api/specializations/',
            dataType: 'json',
            delay: 250,
            cache: true,
            
            data: function(params) {
                return {
                    'name__icontains': params.term,
                    page: params.page,
                }
            },
            
            processResults: function(data, params) {
                params.page = params.page || 1
                
                return {
                    results: _.map(function(item) {
                        return {
                            text: item.name,
                            id: item.id,
                            orig_item: item,
                        }
                    }, data.results),
                    
                    pagination: {
                        more: (params.page * 10) < data.count,
                    },
                }
            },
        },
    }
    
    $specSelects.select2(select2Options)
    
    var $specSelect1 = $('.-spec-select-level-1')
    var $specSelect2 = $('.-spec-select-level-2')
    var $specSelect3 = $('.-spec-select-level-3')
    var $specSelect4 = $('.-spec-select-level-4')
    
    //$specSelect1.on('select2:select', function($evt) {
    //    
    //})
    
    $specSelect2.on('select2:select', function($evt) {
        var spec = $evt.params.data.orig_item
        
        $specSelect1.append('<option value="'+ spec.parent.id + '">' + spec.parent.name + '</option>').trigger('select2:select')
    })
    
    $specSelect3.on('select2:select', function($evt) {
        var spec = $evt.params.data.orig_item
        
        $specSelect2.append('<option value="'+ spec.parent.id + '">' + spec.parent.name + '</option>').trigger('select2:select')
        $specSelect1.trigger('select2:select')
    })
    
    $specSelect4.on('select2:select', function($evt) {
        var spec = $evt.params.data.orig_item
        
        $specSelect3.append('<option value="'+ spec.parent.id + '">' + spec.parent.name + '</option>').trigger('select2:select')
        $specSelect2.trigger('select2:select')
    })
    
    window.$specSelect1 = $specSelect1
    window.$specSelect2 = $specSelect2
    window.$specSelect3 = $specSelect3
    window.$specSelect4 = $specSelect4
})


// Utils -----------------------------------------------


function humanFileSize(bytes, si) {
    var thresh = si ? 1000 : 1024
    
    if (Math.abs(bytes) < thresh)
        return bytes + ' B'
    
    var units = si
        ? ['kB','MB','GB','TB','PB','EB','ZB','YB']
        : ['KiB','MiB','GiB','TiB','PiB','EiB','ZiB','YiB']
    
    var u = -1
    
    do {
        bytes /= thresh
        ++u
    } while (Math.abs(bytes) >= thresh && u < units.length-1)
    
    return bytes.toFixed(1) + ' ' + units[u]
}


//---------------------------------------------------


$('#realtyId').on('change', function($evt) {
    var realtyId = Number($(this).val())
    
    if (realtyId) {
        loadRealtyDetails(realtyId).then(function(res) {
            $('#realtyName').val(res.name)
            $('#realtyBuildingClassificationId').val(res.building_classification.id).change()
            $('#realtyConstructionTypeId').val(res.construction_type.id).change()
            $('#realtyLocationId').val(res.location.id).change()
        })
    } else {
        $('#realtyName').val('')
        $('#realtyBuildingClassificationId').val('').change()
        $('#realtyConstructionTypeId').val('').change()
        $('#realtyLocationId').val('').change()
    }
})

function loadRealtyDetails(realtyId) {
    return $.ajax({
        url: '/api/realties/' + realtyId + '/',
        method: 'GET',
        dataType: 'json',
    })
        .then(function(res) {return res})
        .fail(function() {console.error('Failed', arguments)})
}


//---------------------------------------


var $fileUploadContainer = $('#fileUploadContainer')

$('#fileUploadAddBtn').on('click', function($evt) {
    $fileUploadContainer.find('.file-upload-widget').last().children('.file-upload-input').click()
})

$fileUploadContainer.on('change', '.file-upload-input', function($evt) {
    var $fileInput = $(this)
    var $fileUploadWidget = $fileInput.parent('.file-upload-widget')
    var filePath = $fileInput.val().replace(/\\/g, '/')
    var fileName = path.basename(filePath)
    //var fileExt = path.extname(filePath)
    var fileSize = $fileInput.get(0).files && humanFileSize($fileInput.get(0).files[0].size)
    
    if (fileName) {
        $fileUploadWidget.children('.file-upload-label').text(fileName + ' ' + fileSize)
        
        var $newFileUploadWidget = $fileUploadWidget.clone()
        $newFileUploadWidget.children('.file-upload-label').text('')
        
        $fileUploadContainer.children('ul').first().append($newFileUploadWidget)
        
        $fileUploadWidget.css('display', 'block')
    }
})

$fileUploadContainer.on('click', '.file-upload-remove-btn', function($evt) {
    var $btn = $(this)
    $btn.parent('.file-upload-widget').remove()
})

$fileUploadContainer.on('click', '.existing-file-remove-btn', function($evt) {
    var $btn = $(this)
    $btn.parent('.existing-file-widget').remove()
})