const loggable = require('vn-loopback/util/log');

module.exports = Self => {
    Self.remoteMethodCtx('clone', {
        description: 'Clone the invoiceIn and as many invoiceInTax and invoiceInDueDay referencing it',
        accessType: 'WRITE',
        accepts: {
            arg: 'id',
            type: 'number',
            required: true,
            description: 'The invoiceIn id',
            http: {source: 'path'}
        },
        returns: {
            type: 'object',
            root: true
        },
        http: {
            path: '/:id/clone',
            verb: 'POST'
        }
    });

    Self.clone = async(ctx, id, options) => {
        const userId = ctx.req.accessToken.userId;
        const models = Self.app.models;
        let tx;
        const myOptions = {};

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

        if (!myOptions.transaction) {
            tx = await Self.beginTransaction({});
            myOptions.transaction = tx;
        }

        try {
            const sourceInvoiceIn = await Self.findById(id, {
                fields: [
                    'id',
                    'serial',
                    'supplierRef',
                    'supplierFk',
                    'issued',
                    'currencyFk',
                    'companyFk',
                    'isVatDeductible',
                    'withholdingSageFk',
                    'deductibleExpenseFk',
                ]
            }, myOptions);
            const sourceInvoiceInTax = await models.InvoiceInTax.find({where: {invoiceInFk: id}}, myOptions);
            const sourceInvoiceInDueDay = await models.InvoiceInDueDay.find({where: {invoiceInFk: id}}, myOptions);

            const issued = new Date(sourceInvoiceIn.issued);
            issued.setMonth(issued.getMonth() + 1);

            const clone = await models.InvoiceIn.create({
                serial: sourceInvoiceIn.serial,
                supplierRef: sourceInvoiceIn.supplierRef,
                supplierFk: sourceInvoiceIn.supplierFk,
                issued: issued,
                currencyFk: sourceInvoiceIn.currencyFk,
                companyFk: sourceInvoiceIn.companyFk,
                isVatDeductible: sourceInvoiceIn.isVatDeductible,
                withholdingSageFk: sourceInvoiceIn.withholdingSageFk,
                deductibleExpenseFk: sourceInvoiceIn.deductibleExpenseFk,
            }, myOptions);

            const promises = [];

            for (let tax of sourceInvoiceInTax) {
                promises.push(models.InvoiceInTax.create({
                    invoiceInFk: clone.id,
                    taxableBase: tax.taxableBase,
                    expenseFk: tax.expenseFk,
                    foreignValue: tax.foreignValue,
                    taxTypeSageFk: tax.taxTypeSageFk,
                    transactionTypeSageFk: tax.transactionTypeSageFk
                }, myOptions));
            }

            for (let dueDay of sourceInvoiceInDueDay) {
                const dueDated = dueDay.dueDated;
                dueDated.setMonth(dueDated.getMonth() + 1);

                promises.push(models.InvoiceInDueDay.create({
                    invoiceInFk: clone.id,
                    dueDated: dueDated,
                    bankFk: dueDay.bankFk,
                    amount: dueDay.amount,
                    foreignValue: dueDated.foreignValue,
                }, myOptions));
            }

            await Promise.all(promises);

            if (tx) await tx.commit();

            return clone;
        } catch (e) {
            if (tx) await tx.rollback();
            throw e;
        }
    };
};