import moment from 'moment';
import fetch from 'node-fetch';
import { models } from './models/index.js';
import { v4 as uuidv4 } from 'uuid';
import colors from 'colors';
import ora from 'ora';

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

// URL of API
const 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();
    
    if (!clientConfigData[0])
        throw colors.red.bold('No data found in the configuration table, ',
            'if you have configured the .env file, declare the variable SECRET as true')

    const spinner = ora(`Requesting token...`).start();
    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(tokenEndpoint, {
            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) {
            spinner.succeed();

        } else {
            spinner.fail();
            throw new Error(`Token request failed with status: ${tokenRequest.status} - ${tokenRequest.statusText}`);
        }

        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 {
        spinner.text = 'Using stored token...'
        spinner.succeed();
        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 {
        const spinner = ora(`Updating config...`).start();
        await models.clientConfig.upsert({
            id: 1,
            clientId: clientId,
            clientSecret: clientSecret,
            currentToken: accessToken,
            tokenExpiration: tokenExpirationDate,
            requestLimit: 500,
        });
        spinner.succeed();
    } catch (error) {
        spinner.fail();
        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);
    });
}

/**
 * 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

/**
 * Syncs the sequence number for the given model
 * if no params are given it will reset all the sequence number to 0
 * 
 * @param {Number} current - current sequence number
 * @param {String} model - model name
 * @param {Number} maximumSequenceNumber - maximum sequence number
 * @returns
 */
async function syncSequence(current = 0, model = null , maximumSequenceNumber = 0){
    if (model == null && current == 0){
        try {
            let mockModels = [
                'suppliers',
                'tradeItems',
                'supplyLines',
            ];
            const spinner = ora(`Syncing sequence...`).start();
            for (let mockModel in mockModels) {
                const element = mockModels[mockModel];
                await syncSequence(0, element);
            }
            spinner.succeed();
        } catch (err) {
            spinner.fail();
            throw(err);
        }
    } else if (current) {

        let tx = await models.sequelize.transaction();
    
        try {
            let sequence = await models.sequenceNumber.findOrCreate({
                where: {
                    model: model
                },
                defaults: {
                    model: model,
                    sequenceNumber: current,
                    maximumSequenceNumber: maximumSequenceNumber
                },
                transaction: tx
            });

            if (sequence[1] == false){
                await models.sequenceNumber.update({
                    sequenceNumber: current,
                    maximumSequenceNumber: maximumSequenceNumber
                }, {
                    where: {
                        model: model
                    },
                    transaction: tx
                });
            }

            await tx.commit();

        } catch (error) {
            await tx.rollback();
            console.log(`Error while syncing sequence number for: ${model}: ${error}`);
        }
    }
}

async function syncSuppliers(){
    try {
        const spinner = ora('Preparing to load suppliers...').start();
        let headers = {
            'Content-Type': 'application/json',
            'Authorization': `Bearer ${await getJWT()}`,
            'X-Api-Key': process.env.API_KEY
        };
    
        const response = await fetch(`${url}/organizations/current-max-sequence`, {
            method: 'GET',
            headers: headers
        });
        const maxSequenceNumber = await response.json();
        let timeFinish, timeToGoSec, timeToGoMin, timeLeft;
        for (let curSequenceNumber = 0; curSequenceNumber <= maxSequenceNumber; curSequenceNumber++) {
            let timeStart = new moment();
    
            let query = `${url}/organizations/sync/${curSequenceNumber}?organizationType=SUPPLIER`;
            let response = await fetch(query, {
                method: 'GET',
                headers: headers
            });
            let data = await response.json();
    
            let suppliers = data.results;
            for (let supplier of suppliers) {
                curSequenceNumber = supplier.sequenceNumber;
                spinner.text = `Loading suppliers, ${maxSequenceNumber - curSequenceNumber} are missing`
                if (timeFinish)
                    spinner.text = spinner.text + ` (${timeLeft})`
                await models.supplier.upsert({
                    sequenceNumber: supplier.sequenceNumber,
                    companyGln: supplier.companyGln,
                    name: supplier.name,
                    commercialName: supplier.commercialName,
                    email: supplier.email,
                    phone: supplier.phone,
                    website: supplier.website,
                    organizationId: supplier.organizationId,
                    rfhRelationId: supplier.rfhRelationId,
                    paymentProviders: `${supplier.paymentProviders}`,
                    endDate: supplier.endDate,
                    mailingAddress: supplier.mailingAddress,
                    physicalAddress: supplier.physicalAddress,
                    pythosanitaryNumber: supplier.pythosanitaryNumber,
                    organizationType: supplier.organizationType
                });
            }
            await syncSequence(curSequenceNumber, 'suppliers', maxSequenceNumber);
            timeFinish = new moment();
            timeToGoSec = (timeFinish.diff(timeStart, 'seconds') * (maxSequenceNumber - curSequenceNumber) / 1000)
            timeToGoMin = Math.trunc(timeToGoSec / 60)
            if (!timeToGoMin)
                timeLeft = `${Math.trunc(timeToGoSec)} sec`
            else
                timeLeft = `${timeToGoMin} min`
        }
        spinner.succeed()
    }
    catch (err) {
        spinner.fail();
        throw(err);
    }
}

async function syncConnections(){
    let connections = await models.connection.findAll();

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

    let remoteConnections = await fetch(`${url}/connections`, {
        method: 'GET',
        headers: headers
    });

    remoteConnections = await remoteConnections.json();

    for (let connection of connections){
        if (connection.isConnected == false){
            continue;
        }
        let remoteConnection = remoteConnections.find(remoteConnection => remoteConnection == connection.organizationId);

        if (remoteConnection == undefined){
            console.log('Connection: ', connection, 'does not exist in the remote server');
            console.log('Creating remote connection');
            await fetch(`${url}/connections/${connection.organizationId}`, {
                method: 'PUT',
                headers: headers
            });
            await models.connection.update({ isConnected: true }, {
                where: {
                    organizationId: connection.organizationId
                }
            });
            await models.supplier.update({ isConnected: true }, {
                where: {
                    organizationId: connection.organizationId
                }
            });
        } else {
            console.log('Connection: ', connection, 'exists in the remote server');
            await models.connection.update({ isConnected: true }, {
                where: {
                    organizationId: connection.organizationId
                }
            });
            await models.supplier.update({ isConnected: true }, {
                where: {
                    organizationId: connection.organizationId
                }
            });

        }
    }
        
}

async function syncTradeItems(){
    const suppliers = await models.supplier.findAll();
    let i = 0;
    console.log('Syncing trade items');
    for (let supplier of suppliers) {
        i++;

        if (!supplier.isConnected){
            console.log('Supplier: ', supplier.commercialName, 'is not connected');
            console.log('Skipping supplier', supplier.commercialName, '(', i, '/', suppliers.length, ')');
            continue;
        }
        let query = `${url}/trade-items?supplierOrganizationId=${supplier.organizationId}`;
        let headers = {
            'Content-Type': 'application/json',
            'Authorization': `Bearer ${await getJWT()}`,
            'X-Api-Key': process.env.API_KEY
        };
        try {

            let request = await fetch(query, {
                method: 'GET',
                headers: headers
            });

            let tradeItems = await request.json();

            if (tradeItems.length == 0) {
                console.log('No trade items for supplier: ', supplier.commercialName);
                continue;
            }

            for (let tradeItem of tradeItems) {

                await insertItem(tradeItem, supplier);
                
            }

            console.log('Synced trade items for: ', supplier.commercialName);
            console.log('Remaining suppliers: ', suppliers.length - i, 'of', suppliers.length);
            console.log('Total trade items: ', tradeItems.length);
        } catch (error) {
            console.log('Error while syncing trade items for: ', supplier.commercialName);
            console.log(error);
        }
                
    }
}

/**
 *  Syncs the supply lines for suppliers that are connected
 *  to do this, it fetches all the supply lines for every tradeitem of the suppliers
 */
async function syncSupplyLines(){

    let currentSequenceNumber = await models.sequenceNumber.findOne({
        where: {
            model: 'supplyLines'
        }
    });

    console.log('Syncing supply lines');
    let suppliers = await models.supplier.findAll({
        where: {
            isConnected: true
        }
    });

    let tradeItems = await models.tradeItem.findAll({
        where: {
            supplierOrganizationId: suppliers.map(supplier => supplier.organizationId)
        }
    });

    console.log('Found', suppliers.length, 'connected suppliers');

    let promises = [];

    let headers = {
        'Content-Type': 'application/json',
        'Authorization': `Bearer ${await getJWT()}`,
        'X-Api-Key': process.env.API_KEY
    };
    
    // Launch a promise for each supplier
    for (let tradeItem of tradeItems) {          
        let supplier = suppliers.find(supplier => supplier.organizationId == tradeItem.supplierOrganizationId);
        console.log('Requesting supply lines for ' + supplier.commercialName + ' - ' + tradeItem.name);
        // eslint-disable-next-line no-async-promise-executor
        let promise = new Promise(async (resolve) => {
            try {

                let url = `${url}/supply-lines/sync/0?supplierOrganizationId=${supplier.organizationId}&tradeItemId=${tradeItem.tradeItemId}&limit=100&postFilterSelectedTradeItems=false`;

                let request = await fetch(url, {
                    method: 'GET',
                    headers: headers
                });

                let supplyLines = await request.json();

                if (supplyLines.length == 0) {
                    console.log('No supply lines for supplier: ', supplier.commercialName, ' - ' , tradeItem.name);
                    resolve([]);
                    return;
                }

                resolve(supplyLines);

            } catch (error) {
                console.log('Error while syncing supply lines for: ', supplier.commercialName, ' - ' , tradeItem.name);
                console.log(error);
                resolve([]);
            }
        });

        promises.push(promise);
    
    }

    let supplyLines = await Promise.all(promises);
    let maximumSequenceNumber;

    for (let supplyLine of supplyLines) {
        maximumSequenceNumber = supplyLine.maximumSequenceNumber;
        supplyLine = supplyLine.results;
        try {
            for (let line of supplyLine) {

                let tradeItem = await models.tradeItem.findOne({
                    where: {
                        tradeItemId: line.tradeItemId
                    }
                });
    
                if (!tradeItem) {
                    console.log('Trade item not found for supply line: ', line.supplyLineId);
                    console.log('Requesting data for trade item id: ', line.tradeItemId);
                
                    let urlTradeItem = `${url}/trade-items?tradeItemIds=${line.tradeItemId}`;

                    let queryTradeItem = await fetch(urlTradeItem, {
                        method: 'GET',
                        headers: headers
                    });

                    let tradeItem = await queryTradeItem.json();

                    if (tradeItem.length == 0) {

                        console.log('Trade item not found for supply line: ', line.supplyLineId);
                        console.log('Trade item id: ', line.tradeItemId);
                        continue;
                    }

                    let supplier = await models.supplier.findOne({
                        where: {
                            organizationId: tradeItem[0].supplierOrganizationId
                        }
                    });

                    await insertItem(tradeItem[0], supplier);

                    tradeItem = await models.tradeItem.findOne({
                        where: {
                            tradeItemId: line.tradeItemId
                        }
                    });

                    if (!tradeItem) {
                        console.log('Trade item not found for supply line: ', line.supplyLineId);
                        console.log('Trade item id: ', line.tradeItemId);
                        continue;
                    }

                }

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


            }
        } catch (error) {
            console.log('Error while syncing supply lines - ' + supplyLine.results[0].tradeItemId);
            console.log(error);
        }
    }

    console.log('Synced supply lines');

    await syncSequence(currentSequenceNumber,'supplyLines' ,maximumSequenceNumber);
}

async function insertItem(tradeItem, supplier) {

    let tx = await models.sequelize.transaction();

    console.log('Syncing trade item: ', tradeItem.name);

    try {

        // Temporal connection to all suppliers that have trade items

        let currentSupp = await models.supplier.findOne({
            where: {
                organizationId: tradeItem.supplierOrganizationId
            }
        });

        currentSupp.isConnected = true;

        await currentSupp.save({transaction: tx});

        await models.connection.upsert({
            organizationId: tradeItem.supplierOrganizationId,
            connect: true,
        }, {transaction: tx});

        // ----- 

        await models.tradeItem.upsert({
            tradeItemId: tradeItem.tradeItemId,
            supplierOrganizationId: tradeItem.supplierOrganizationId,
            code: tradeItem.code,
            gtin: tradeItem.gtin,
            vbnProductCode: tradeItem.vbnProductCode,
            name: tradeItem.name,
            isDeleted: tradeItem.isDeleted,
            sequenceNumber: tradeItem.sequenceNumber,
            tradeItemVersion: tradeItem.tradeItemVersion,
            isCustomerSpecific: tradeItem.isCustomerSpecific,
            isHiddenInCatalog: tradeItem.isHiddenInCatalog,
        }, 
        {transaction: tx});


        let characteristics = tradeItem.characteristics;

        for (let characteristic of characteristics) {
            await models.characteristic.upsert({
                vbnCode: characteristic.vbnCode,
                vbnValueCode: characteristic.vbnValueCode,
                tradeItemFk: tradeItem.tradeItemId,
            }, {transaction: tx});
        }

        let seasonalPeriods = tradeItem.seasonalPeriods;

        for (let seasonalPeriod of seasonalPeriods) {
            await models.seasonalPeriod.upsert({
                startWeek: seasonalPeriod.startWeek,
                endWeek: seasonalPeriod.endWeek,
                tradeItemFk: tradeItem.tradeItemId,
            }, {transaction: tx});
        }

        let photos = tradeItem.photos;

        for (let photo of photos) {
            await models.photo.upsert({
                id: photo.id,
                url: photo.url,
                type: photo.type,
                primary: photo.primary,
                tradeItemFk: tradeItem.tradeItemId,
            }, {transaction: tx});
        }

        let packingConfigurations = tradeItem.packingConfigurations;

        for (let packingConfiguration of packingConfigurations) {

            let uuid = uuidv4();

            await models.packingConfiguration.upsert({
                packingConfigurationId: uuid,
                piecesPerPackage: packingConfiguration.piecesPerPackage,
                bunchesPerPackage: packingConfiguration.bunchesPerPackage,
                photoUrl: packingConfiguration.photoUrl,
                packagesPerLayer: packingConfiguration.packagesPerLayer,
                layersPerLoadCarrier: packingConfiguration.layersPerLoadCarrier,
                additionalPricePerPiece : JSON.stringify(packingConfiguration.additionalPricePerPiece),
                transportHeightInCm: packingConfiguration.transportHeightInCm,
                loadCarrierType: packingConfiguration.loadCarrierType,
                isPrimary: packingConfiguration.isPrimary,
                tradeItemFk: tradeItem.tradeItemId,
            }, {transaction: tx});
            await models.package.upsert({
                vbnPackageCode: packingConfiguration.package.vbnPackageCode,
                customPackageId: packingConfiguration.package.customPackageId,
                packingConfigurationFk: uuid,
            }, {transaction: tx});
        }

        let countryOfOriginIsoCodes = tradeItem.countryOfOriginIsoCodes;

        countryOfOriginIsoCodes ??= 0;

        for (let countryOfOriginIsoCode of countryOfOriginIsoCodes) {
            await models.countryOfOriginIsoCode.upsert({
                isoCode: countryOfOriginIsoCode,
                tradeItemFk: tradeItem.tradeItemId,
            }, {transaction: tx});
        }

        let botanicalNames = tradeItem.botanicalNames;
                    
        for (let botanicalName of botanicalNames) {
            await models.botanicalName.upsert({
                name: botanicalName.name,
                tradeItemFk: tradeItem.tradeItemId,
            }, {transaction: tx});
        }

        await tx.commit();

    } catch (error) {
        await tx.rollback();
        console.log('Error while syncing trade items for: ', supplier.commercialName);
        console.log(error);
    }

}


export { getClientToken, updateClientConfig, getJWT, sleep, asyncQueue, syncSequence, syncSuppliers, syncTradeItems, syncConnections, syncSupplyLines };