const Component = require(`${appPath}/core/component`);
const db = require(`${appPath}/core/database`);
const reportHeader = new Component('report-header');
const reportFooter = new Component('report-footer');
const qrcode = require('qrcode');

module.exports = {
    name: 'item-label',
    async serverPrefetch() {
        this.item = await this.fetchItem(this.itemId, this.warehouseId);
        this.tags = await this.fetchItemTags(this.itemId);
        this.barcode = await this.getBarcodeBase64(this.itemId);

        if (!this.item)
            throw new Error('Something went wrong');
    },

    computed: {
        dated() {
            const filters = this.$options.filters;

            return filters.date(new Date(), '%W/%d');
        },
        labelPage() {
            const labelNumber = this.labelNumber ? this.labelNumber : 1;
            const totalLabels = this.totalLabels ? this.totalLabels : 1;

            return `${labelNumber}/${totalLabels}`;
        }
    },
    methods: {
        fetchItem(id, warehouseId) {
            return db.findOne(
                `SELECT 
                    i.id, 
                    i.name,
                    i.stems, 
                    i.size,
                    b.packing
                FROM vn.item i
                    JOIN cache.last_buy clb ON clb.item_id = i.id
                    JOIN vn.buy b ON b.id = clb.buy_id
                    JOIN vn.entry e ON e.id = b.entryFk
                WHERE i.id = ? AND clb.warehouse_id = ?`, [id, warehouseId]);
        },
        fetchItemTags(itemId) {
            return db.rawSql(
                `SELECT t.code, t.name, it.value
                    FROM vn.itemTag it
                        JOIN vn.tag t ON t.id = it.tagFk
                    WHERE it.itemFk = ?
                `, [itemId]).then(rows => {
                const tags = {};
                rows.forEach(row => tags[row.code] = row.value);

                return tags;
            });
        },
        getBarcodeBase64(itemId) {
            return qrcode.toDataURL(itemId, {margin: 0});
        },
        packing() {
            const stems = this.item.stems ? this.item.stems : 1;
            return `${this.item.packing}x${stems}`;
        }
    },
    components: {
        'report-header': reportHeader.build(),
        'report-footer': reportFooter.build()
    },
    props: {
        itemId: {
            required: true
        },
        warehouseId: {
            required: true
        },
        labelNumber: {
            type: String
        },
        totalLabels: {
            type: String
        }
    }
};