import moment from 'moment';
import fetch from 'node-fetch';
import dotenv from 'dotenv';
import { models } from './models/index.js';
import { v4 as uuidv4 } from 'uuid';
import cliProgress from 'cli-progress';
dotenv.config();

/**
 *  The Endpoint where the Access Token is requested
 */
const _accessTokenEndpoint = 'https://idm.staging.floriday.io/oauth2/ausmw6b47z1BnlHkw0h7/v1/token';

const BASE_CUSTOMER_URL = 'https://api.staging.floriday.io/customers-api/2022v2/';

/**
 *  Gets the Access Token from the client config table
 * 
 * @param {sequelize.models} models 
 * @returns {Date} tokenExpirationDate formated as YYYY-MM-DD HH:mm:ss
 */
async function getClientToken() {
    const clientConfigData = await models.clientConfig.findAll();

    const now = moment().format('YYYY-MM-DD HH:mm:ss');
    const tokenExpirationDate = clientConfigData[0].tokenExpiration;

    if (clientConfigData[0].tokenExpiration == null || moment(now).isAfter(tokenExpirationDate)) {
        let clientId = clientConfigData[0].clientId;
        let clientSecret = clientConfigData[0].clientSecret;

        const tokenRequest = await fetch(_accessTokenEndpoint, {
            method: 'POST',
            headers: {
                'Content-Type': 'application/x-www-form-urlencoded',
            },
            body: `grant_type=client_credentials&client_id=${clientId}&client_secret=${clientSecret}&scope=role:app catalog:read supply:read organization:read network:write network:read`,
        });

        const tokenResponse = await tokenRequest.json();

        if (tokenRequest.status === 200) {
            console.log('Token request successful');
        } else {
            throw new Error(
                `Token request failed with status ${tokenRequest.status}`
            );
        }

        const accessToken = tokenResponse.access_token;
        let now = moment().format('YYYY-MM-DD HH:mm:ss');

        let tokenExpirationDate = moment(now)
            .add(tokenResponse.expires_in, 's')
            .format('YYYY-MM-DD HH:mm:ss');

        await updateClientConfig(
            clientId,
            clientSecret,
            accessToken,
            tokenExpirationDate
        );

        return tokenExpirationDate;
    } else {
        console.log('Using the current token...');
        return tokenExpirationDate;
    }
}

/**
 *  Updates the Access Token in the client config table
 * 
 * @param {sequelize.models} models 
 * @param {String} clientId 
 * @param {String} clientSecret 
 * @param {String} accessToken 
 * @param {String} tokenExpirationDate 
 */
async function updateClientConfig(clientId, clientSecret, accessToken, tokenExpirationDate) {
    try {
        console.log('Updating the client config with the new token...');
        await models.clientConfig.update(
            {
                clientId: clientId,
                clientSecret: clientSecret,
                currentToken: accessToken,
                tokenExpiration: tokenExpirationDate,
            },
            {
                where: {
                    id: 1,
                },
            }
        );
        console.log('Client config updated, new Token set');
        console.log('New token expiration date: ', tokenExpirationDate);
    } catch (error) {
        console.log('There was a error while updating the client config');
        console.log(error);
    }
}

/**
 * returns the current Access Token
 * 
 * @returns 
 */
async function getJWT() {
    const clientConfigData = await models.clientConfig.findAll();
    return clientConfigData[0].currentToken;
}

/**
 * pauses the execution of the script for the given amount of milliseconds
 * 
 * @param {integer} ms 
 * @returns A promise that resolves after ms milliseconds.
 */
async function sleep(ms) {
    return new Promise((resolve) => {
        setTimeout(resolve, ms);
    });
}

/**
 * Returns the uuidv4 string with the prefix 'Vn-'
 * 
 * @param {string} uuidv4 - uuidv4 string
 * @returns 
 */
async function vnUuid(uuidv4) {
    return 'Vn-' + uuidv4;
}
/**
 * Returns the uuidv4 string without the prefix 'Vn-'
 * 
 * @param {string} uuidv4 - uuidv4 string with prefix 'Vn-'
 * @returns 
 */
async function removeVnPrefix(uuidv4) {
    return uuidv4.replace('Vn-', '');
}

/**
 * Recieves an array of functions and executes them in a queue with the given concurrency
 * 
 * @param {Array} fnArray 
 * @param {Number} concurrency 
 * @returns 
 */
async function asyncQueue(fnArray, concurrency = 1) {

    const results = []; // 1

    const queue = fnArray.map((fn, index) => () => fn().then((result) => results[index] = result));

    const run = async () => { // 2
        const fn = queue.shift();
        if (fn) {
            await fn();
            await run();
        }
    };

    const promises = []; // 3
    while (concurrency--) { // 4
        promises.push(run());
    }

    await Promise.all(promises); // 5 

    return results;

}
// 1. Create an array of functions that will be executed in a queue
// 2. Create a function that will execute the functions in the queue
// 3. Create an array of promises that will execute the run function
// 4. Execute the run function while the concurrency is greater than 0
// 5. Return the results


/**
 * 
 * Inserts every tradeitem from the organization into the DB
 * 
 * @param {*} organizationGln 
 */
async function getTradeitems(organizationGln) {

    const headers = {
        'Content-Type': 'application/json',
        'Authorization': 'Bearer ' + await getJWT(),
        'X-Api-Key': process.env.API_KEY,
    };

    // Get the organization id from the organizationGln

    const organizationsUrl = `${BASE_CUSTOMER_URL}organizations/gln/${organizationGln}`;
    const organizationsRequest = await fetch(organizationsUrl, {
        method: 'GET',
        headers: headers,
    });

    const organizationsResponse = await organizationsRequest.json();

    const organizationId = organizationsResponse.organizationId;
    console.log('Organization ID: ', organizationId);

    // Get the tradeitems from the organization

    const tradeitemsUrl = `${BASE_CUSTOMER_URL}trade-items?supplierOrganizationId=${organizationId}`;
    const tradeitemsRequest = await fetch(tradeitemsUrl, {
        method: 'GET',
        headers: headers,
    });

    const tradeitemsResponse = await tradeitemsRequest.json();

    // If there is no tradeitems
    if (tradeitemsResponse.length == 0) {
        return;
    }

    // if there is at least one tradeitem, save it in the database

    //console.log(tradeitemsResponse[0]);

    try {

        if (tradeitemsResponse.length > 0 && tradeitemsResponse != null) {

            let bar = new cliProgress.SingleBar({}, cliProgress.Presets.shades_grey);
            bar.start(tradeitemsResponse.length, 0);

            await tradeitemsResponse.forEach(async item => {

                bar.increment();

                try {

                    item.tradeItemId = await vnUuid(item.tradeItemId);

                    await models.suppliers.upsert({
                        supplierId: await vnUuid(organizationId),
                        supplierGln: organizationGln,
                    });

                    await models.tradeItem.upsert({
                        tradeItemId: item.tradeItemId,
                        supplierOrganizationId: organizationGln,
                        supplierOrganizationUuid: await vnUuid(organizationId),
                        code: item.code,
                        gtin: item.gtin,
                        vbnProductCode: item.vbnProductCode,
                        name: item.name,
                        isDeleted: item.isDeleted,
                        sequenceNumber: item.sequenceNumber,
                        tradeItemVersion: item.tradeItemVersion,
                        isCustomerSpecific: item.isCustomerSpecific,
                        isHiddenInCatalog: item.isHiddenInCatalog,
                    });

                    await item.characteristics.forEach((characteristic) => {
                        models.characteristics.upsert({
                            tradeItemFk: item.tradeItemId,
                            vbnCode: characteristic.vbnCode,
                            vbnValueCode: characteristic.vbnValueCode,
                        });
                    });

                    await item.seasonalPeriods.forEach((seasonalPeriod) => {
                        models.seasonalPeriod.upsert({
                            tradeItemFk: item.tradeItemId,
                            startWeek: seasonalPeriod.startWeek,
                            endWeek: seasonalPeriod.endWeek,
                        });

                    });

                    await item.photos.forEach(async (photo) => {

                        photo.id = await vnUuid(photo.id);

                        models.photos.upsert({
                            tradeItemFk: item.tradeItemId,
                            photoId: photo.id,
                            url: photo.url,
                            seasonalPeriodFk: JSON.stringify(photo.seasonalPeriod),
                            type: photo.type,
                            primary: photo.primary,
                        });
                    });

                    await item.packingConfigurations.forEach(async (packagingConfiguration) => {

                        let uuid = uuidv4();
                        uuid = await vnUuid(uuid);

                        await models.packingConfigurations.upsert({
                            tradeItemFk: item.tradeItemId,
                            packingConfigurationId: uuid,
                            piecesPerPackage: packagingConfiguration.piecesPerPackage,
                            bunchesPerPackage: packagingConfiguration.bunchesPerPackage,
                            photoUrl: packagingConfiguration.photoUrl,
                            packagesPerLayer: packagingConfiguration.packagesPerLayer,
                            layersPerLoadCarrier: packagingConfiguration.layersPerLoadCarrier,
                            transportHeightInCm: packagingConfiguration.transportHeightInCm,
                            loadCarrierType: packagingConfiguration.loadCarrierType,
                            isPrimary: packagingConfiguration.isPrimary,
                            additionalPricePerPiece: JSON.stringify(packagingConfiguration.additionalPricePerPiece),
                        });

                        await models.package.upsert({
                            packingConfigurationsId: uuid,
                            vbnPackageCode: packagingConfiguration.package.vbnPackageCode,
                            vbnPackageValueCode: packagingConfiguration.package.vbnPackageValueCode,
                        });

                    });

                    await item.botanicalNames.forEach((botanicalName) => {
                        models.botanicalNames.upsert({
                            tradeItemFk: item.tradeItemId,
                            name: botanicalName,
                        });
                    });

                    await item.countryOfOriginIsoCodes.forEach((countryOfOriginIsoCode) => {
                        models.countryOfOriginIsoCodes.upsert({
                            tradeItemFk: item.tradeItemId,
                            isoCode: countryOfOriginIsoCode,
                        });
                    });

                } catch (error) {
                    console.log('Missing data for the tradeitem: ' + item.tradeItemId);
                    bar.stop();
                    return;
                }

            });
            bar.stop();
        }

    } catch (error) {
        console.log('There was an error while saving the data to the database, trying again in 5 seconds...');
        await sleep(5000);
        await getTradeitems(organizationGln);
    }
}

/**
 * Gets a single tradeitem from the API and inserts it into the database
 * 
 * @param {*} tradeItemId 
 */
async function getTradeItem(tradeItemId) {

    try {
        const headers = {
            'Content-Type': 'application/json',
            'Authorization': `Bearer ${await getJWT()}`,
            'X-Api-Key': process.env.API_KEY,
        };

        const tradeitemUrl = `${BASE_CUSTOMER_URL}trade-items/${tradeItemId}`;

        const tradeitemRequest = await fetch(tradeitemUrl, {
            method: 'GET',
            headers: headers,
        });

        const tradeitemResponse = await tradeitemRequest.json();

        tradeitemResponse.tradeItemId = await vnUuid(tradeitemResponse.tradeItemId);

        await models.tradeItem.upsert({
            tradeItemId: tradeitemResponse.tradeItemId,
            supplierOrganizationId: tradeitemResponse.supplierOrganizationGln,
            supplierOrganizationUuid: await vnUuid(tradeitemResponse.supplierOrganizationId),
            code: tradeitemResponse.code,
            gtin: tradeitemResponse.gtin,
            vbnProductCode: tradeitemResponse.vbnProductCode,
            name: tradeitemResponse.name,
            isDeleted: tradeitemResponse.isDeleted,
            sequenceNumber: tradeitemResponse.sequenceNumber,
            tradeItemVersion: tradeitemResponse.tradeItemVersion,
            isCustomerSpecific: tradeitemResponse.isCustomerSpecific,
            isHiddenInCatalog: tradeitemResponse.isHiddenInCatalog,
        });

        await tradeitemResponse.characteristics.forEach((characteristic) => {
            models.characteristics.upsert({
                tradeItemFk: tradeitemResponse.tradeItemId,
                vbnCode: characteristic.vbnCode,
                vbnValueCode: characteristic.vbnValueCode,
            });
        });

        await tradeitemResponse.seasonalPeriods.forEach((seasonalPeriod) => {
            models.seasonalPeriod.upsert({
                tradeItemFk: tradeitemResponse.tradeItemId,
                startWeek: seasonalPeriod.startWeek,
                endWeek: seasonalPeriod.endWeek,
            });

        });

        await tradeitemResponse.photos.forEach(async (photo) => {

            photo.id = await vnUuid(photo.id);

            models.photos.upsert({
                tradeItemFk: tradeitemResponse.tradeItemId,
                photoId: photo.id,
                url: photo.url,
                seasonalPeriodFk: JSON.stringify(photo.seasonalPeriod),
                type: photo.type,
                primary: photo.primary,
            });
        });

        await tradeitemResponse.packingConfigurations.forEach(async (packagingConfiguration) => {

            let uuid = uuidv4();
            uuid = await vnUuid(uuid);

            await models.packingConfigurations.upsert({
                tradeItemFk: tradeitemResponse.tradeItemId,
                packingConfigurationId: uuid,
                piecesPerPackage: packagingConfiguration.piecesPerPackage,
                bunchesPerPackage: packagingConfiguration.bunchesPerPackage,
                photoUrl: packagingConfiguration.photoUrl,
                packagesPerLayer: packagingConfiguration.packagesPerLayer,
                layersPerLoadCarrier: packagingConfiguration.layersPerLoadCarrier,
                transportHeightInCm: packagingConfiguration.transportHeightInCm,
                loadCarrierType: packagingConfiguration.loadCarrierType,
                isPrimary: packagingConfiguration.isPrimary,
                additionalPricePerPiece: JSON.stringify(packagingConfiguration.additionalPricePerPiece),
            });

            await models.package.upsert({
                packingConfigurationsId: uuid,
                vbnPackageCode: packagingConfiguration.package.vbnPackageCode,
                vbnPackageValueCode: packagingConfiguration.package.vbnPackageValueCode,
            });

        });

        await tradeitemResponse.botanicalNames.forEach((botanicalName) => {
            models.botanicalNames.upsert({
                tradeItemFk: tradeitemResponse.tradeItemId,
                name: botanicalName,
            });
        });

        await tradeitemResponse.countryOfOriginIsoCodes.forEach((countryOfOriginIsoCode) => {
            models.countryOfOriginIsoCodes.upsert({
                tradeItemFk: tradeitemResponse.tradeItemId,
                isoCode: countryOfOriginIsoCode,
            });
        });

        return true;
    } catch (error) {
        console.log('There was an error while saving the data to the database, trying again in 5 seconds...');
        console.log(error.message);
        await sleep(5000);
        await getTradeItem(tradeItemId);
    }

}

/**
 * Gets the stock for all suppliers
 * 
 * Does this by getting all suppliers and then calling the getStockBySupplier function for each supplier
 */
async function getStock() {

    const suppliers = await models.suppliers.findAll();

    const supplierQueue = [];

    suppliers.forEach(async (supplier) => {
        supplierQueue.push(await getStockBySupplier(supplier.supplierId));
    });

    await asyncQueue(supplierQueue);

}

/**
 * Returns the stock for a given supplier
 * 
 * @param {*} supplierId 
 * @returns void - inserts the stock into the database
 */
async function getStockBySupplier(supplierId) {

    supplierId = await removeVnPrefix(supplierId);

    const headers = {
        'Content-Type': 'application/json',
        'Authorization': `Bearer ${await getJWT()}`,
        'X-Api-Key': process.env.API_KEY,
    };

    const stockUrl = `${BASE_CUSTOMER_URL}supply-lines?supplierOrganizationId=${supplierId}`;

    let stockRequest;

    try {
        stockRequest = await fetch(stockUrl, {
            method: 'GET',
            headers: headers,
        });
    } catch (error) {
        console.log(error.message);
        return;
    }

    const stockResponse = await stockRequest.json();

    if (stockResponse.length == 0) {
        return;
    }

    try {

        if (stockResponse.length > 0 && stockResponse != null) {

            let bar = new cliProgress.SingleBar({}, cliProgress.Presets.shades_grey);
            bar.start(stockResponse.length, 0);

            await stockResponse.forEach(async supplyLine => {

                bar.increment();

                let alreadyExists = await models.supplyLines.findOne({
                    where: {
                        supplyLineId: supplyLine.supplyLineId,
                    }
                });

                if (alreadyExists) {
                    return;
                }

                try {

                    await models.supplyLines.upsert({
                        supplyLineId: supplyLine.supplyLineId,
                        status: supplyLine.status,
                        supplierOrganizationId: await vnUuid(supplyLine.supplierOrganizationId),
                        pricePerPiece: supplyLine.pricePerPiece,
                        numberOfPieces: supplyLine.numberOfPieces,
                        deliveryPeriod: supplyLine.deliveryPeriod,
                        orderPeriod: supplyLine.orderPeriod,
                        warehouseId: await vnUuid(supplyLine.warehouseId),
                        sequenceNumber: supplyLine.sequenceNumber,
                        type: supplyLine.type,
                        isDeleted: supplyLine.isDeleted,
                        salesUnit: supplyLine.salesUnit,
                        agreementReferenceCode: supplyLine.agreementReference.code,
                        agreementReferenceDescription: supplyLine.agreementReference.description,
                        isLimited: supplyLine.isLimited,
                        isCustomerSpecific: supplyLine.isCustomerSpecific,
                        tradeItemFk: await vnUuid(supplyLine.tradeItemId),
                    });

                    supplyLine.volumePrices.forEach(async (volumePrice) => {
                        await models.volumePrices.upsert({
                            supplyLineFk: supplyLine.supplyLineId,
                            unit: volumePrice.unit,
                            pricePerPiece: volumePrice.pricePerPiece,
                        });
                    });
                    

                } catch (error) {
                    if (error.name == 'SequelizeForeignKeyConstraintError') {
                        bar.stop();
                        console.log('Missing data for the tradeitem: ' + supplyLine.tradeItemId);
                        console.log('Trying to get the tradeitem data...');
                        await getTradeItem(supplyLine.tradeItemId);
                        return;
                    }
                }

            });
            bar.stop();
        }
    } catch (error) {
        console.log('There was an error while saving the data to the database, trying again in 5 seconds...');
        await sleep(5000);
        await getStockBySupplier(supplierId);
    }

}

export { getClientToken, updateClientConfig, getJWT, getTradeitems, sleep, asyncQueue, getStock };