const UserError = require('vn-loopback/util/user-error');

module.exports = Self => {
    Self.remoteMethodCtx('absences', {
        description: 'Returns an array of absences from an specified contract',
        accepts: [{
            arg: 'businessFk',
            type: 'number',
            required: true,
        },
        {
            arg: 'year',
            type: 'date',
            required: true,
        }],
        returns: [{
            arg: 'absences',
            type: 'number'
        },
        {
            arg: 'holidays',
            type: 'number'
        }],
        http: {
            path: `/absences`,
            verb: 'GET'
        }
    });

    Self.absences = async(ctx, businessFk, year, options) => {
        const models = Self.app.models;

        const started = new Date();
        started.setFullYear(year);
        started.setMonth(0);
        started.setDate(1);

        const ended = new Date();
        ended.setFullYear(year);
        ended.setMonth(12);
        ended.setDate(0);

        let myOptions = {};

        if (typeof options == 'object')
            Object.assign(myOptions, options);

        const contract = await models.WorkerLabour.findOne({
            include: [{
                relation: 'holidays',
                scope: {
                    where: {year}
                }
            },
            {
                relation: 'absences',
                scope: {
                    include: {
                        relation: 'absenceType',
                    },
                    where: {
                        dated: {between: [started, ended]}
                    }
                }
            },
            {
                relation: 'workCenter',
                scope: {
                    include: {
                        relation: 'holidays',
                        scope: {
                            include: [{
                                relation: 'detail'
                            },
                            {
                                relation: 'type'
                            }],
                            where: {
                                dated: {between: [started, ended]}
                            }
                        }
                    }
                }
            }],
            where: {businessFk}
        }, myOptions);

        if (!contract) return;

        const isSubordinate = await models.Worker.isSubordinate(ctx, contract.workerFk, myOptions);
        if (!isSubordinate)
            throw new UserError(`You don't have enough privileges`);

        const absences = [];
        for (let absence of contract.absences()) {
            absence.dated = new Date(absence.dated);
            absence.dated.setHours(0, 0, 0, 0);

            absences.push(absence);
        }

        // Workcenter holidays
        const holidays = [];
        const holidayList = contract.workCenter().holidays();
        for (let day of holidayList) {
            day.dated = new Date(day.dated);
            day.dated.setHours(0, 0, 0, 0);

            holidays.push(day);
        }

        return [absences, holidays];
    };
};