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

module.exports = Self => {
    Self.remoteMethodCtx('transfer', {
        description: 'Transfer an issued invoice to another client',
        accessType: 'WRITE',
        accepts: [
            {
                arg: 'id',
                type: 'number',
                required: true,
                description: 'Issued invoice id'
            },
            {
                arg: 'newClientFk',
                type: 'number',
                required: true
            },
            {
                arg: 'cplusRectificationTypeFk',
                type: 'number',
                required: true
            },
            {
                arg: 'siiTypeInvoiceOutFk',
                type: 'number',
                required: true
            },
            {
                arg: 'invoiceCorrectionTypeFk',
                type: 'number',
                required: true
            },
            {
                arg: 'makeInvoice',
                type: 'boolean',
                required: true
            },
        ],
        returns: {type: 'object', root: true},
        http: {path: '/transfer', verb: 'post'}
    });

    Self.transfer = async(
        ctx,
        id,
        newClientFk,
        cplusRectificationTypeFk,
        siiTypeInvoiceOutFk,
        invoiceCorrectionTypeFk,
        makeInvoice,
        options
    ) => {
        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;
        }

        const originalInvoice = await models.InvoiceOut.findById(id);
        if (!originalInvoice)
            throw new UserError('Original invoice not found');

        if (originalInvoice.clientFk === newClientFk)
            throw new UserError('Select a different client');

        let transferredInvoiceId;
        try {
            await Self.refundAndInvoice(
                ctx,
                id,
                false,
                cplusRectificationTypeFk,
                siiTypeInvoiceOutFk,
                invoiceCorrectionTypeFk,
                myOptions
            );

            const tickets = await models.Ticket.find({where: {refFk: originalInvoice.ref}}, myOptions);
            const ticketIds = tickets.map(ticket => ticket.id);
            const transferredTickets = await models.Ticket.cloneAll(ctx, ticketIds, false, false, myOptions);
            const client = await models.Client.findById(newClientFk,
                {fields: ['id', 'defaultAddressFk']}, myOptions);
            const address = await models.Address.findById(client.defaultAddressFk,
                {fields: ['id', 'nickname']}, myOptions);

            const transferredTicketIds = transferredTickets.map(ticket => ticket.id);
            await models.Ticket.updateAll(
                {id: {inq: transferredTicketIds}},
                {
                    clientFk: newClientFk,
                    addressFk: client.defaultAddressFk,
                    nickname: address.nickname
                },
                myOptions
            );

            if (makeInvoice)
                transferredInvoiceId = await models.Ticket.invoiceTickets(ctx, transferredTicketIds, null, myOptions);

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

        if (transferredInvoiceId) {
            try {
                await models.InvoiceOut.makePdfList(ctx, transferredInvoiceId);
            } catch (e) {
                throw new UserError('The invoices have been created but the PDFs could not be generatedd');
            }
        }

        return transferredInvoiceId;
    };
};