/**
 * Populate audio/video sources using given renditions dict
 */
function SourcesDirective() {
    var typeMap = {
        'video/mpeg': 'video/mp4',
    };

    return {
        scope: {
            renditions: '=',
        },
        link: function(scope, elem, attrs) {
            function pause() {
                elem[0].pause();
            }

            function load() {
                elem[0].load();
            }

            function createSource(rendition) {
                angular.element('<source>')
                    .attr('src', rendition.href)
                    .attr('type', typeMap[rendition.mimetype] || rendition.mimetype)
                    .appendTo(elem);
            }

            scope.$watch('renditions', (renditions) => {
                pause();
                elem.empty();
                angular.forEach(renditions, createSource);
                load();
            });

            scope.$on('$destroy', pause);
        },
    };
}

function FileValidatorDirective() {
    function isAcceptedFileType(file, accept) {
        return file.type.indexOf(accept.replace('*', '')) === 0;
    }

    return {
        require: 'ngModel',
        link: function(scope, elem, attrs, ngModel) {
            ngModel.$validators.fileType = function(modelValue, viewValue) {
                var value = modelValue || viewValue;

                return !value || !attrs.accept || isAcceptedFileType(value, attrs.accept);
            };
        },
    };
}

angular.module('superdesk.core.upload', [
    'ngFileUpload',
    'superdesk.core.services.imageFactory',
    'superdesk.core.upload.crop',
    'superdesk.core.upload.imagecrop',
    'superdesk.core.upload.imagepreview',
    'superdesk.core.upload.imagemodify',
    'superdesk.core.upload.upload',
])
    .directive('sdSources', SourcesDirective)
    .directive('sdFileTypeValidator', FileValidatorDirective);