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: 'workerFk',
            type: 'number',
            required: true,
        },
        {
            arg: 'businessFk',
            type: 'number',
            required: false,
        },
        {
            arg: 'year',
            type: 'date',
            required: true,
        }],
        returns: [{
            arg: 'absences',
            type: 'number'
        },
        {
            arg: 'holidays',
            type: 'number'
        }],
        http: {
            path: `/absences`,
            verb: 'GET'
        }
    });

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

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

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

        const myOptions = {};

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

        let condition = {
            and: [
                {workerFk: workerFk},
                {businessFk: businessFk}
            ]
        };

        if (businessFk)
            condition.and.push({workerFk: workerFk});

        const contracts = await models.WorkerLabour.find({
            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: condition
        }, myOptions);

        if (!contracts) return;

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

        const absences = [];
        const holidays = [];

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

                absences.push(absence);
            }

            for (let day of contract.workCenter().holidays()) {
                day.dated = new Date(day.dated);
                day.dated.setHours(0, 0, 0, 0);

                holidays.push(day);
            }
        }

        return [absences, holidays];
    };
};