const {toCSV} = require('vn-loopback/util/csv');

module.exports = Self => {
    Self.remoteMethodCtx('negativeBasesCsv', {
        description: 'Returns the negative bases as .csv',
        accessType: 'READ',
        accepts: [{
            arg: 'negativeBases',
            type: ['object'],
            required: true
        },
        {
            arg: 'from',
            type: 'date',
            description: 'From date'
        },
        {
            arg: 'to',
            type: 'date',
            description: 'To date'
        }],
        returns: [
            {
                arg: 'body',
                type: 'file',
                root: true
            }, {
                arg: 'Content-Type',
                type: 'String',
                http: {target: 'header'}
            }, {
                arg: 'Content-Disposition',
                type: 'String',
                http: {target: 'header'}
            }
        ],
        http: {
            path: '/negativeBasesCsv',
            verb: 'GET'
        }
    });

    Self.negativeBasesCsv = async ctx => {
        const args = ctx.args;
        const content = toCSV(args.negativeBases);

        return [
            content,
            'text/csv',
            `attachment; filename="negative-bases-${new Date(args.from).toLocaleDateString()}-${new Date(args.to).toLocaleDateString()}.csv"`
        ];
    };
};