require('dotenv').config();
const OAuthClient = require('intuit-oauth');
const { Client } = require('pg');

// --- KONFIGURATION ---
const totalLimit = null; 
// ---------------------

const config = {
    clientId: process.env.QBO_CLIENT_ID,
    clientSecret: process.env.QBO_CLIENT_SECRET,
    environment: process.env.QBO_ENVIRONMENT || 'sandbox',
    redirectUri: process.env.QBO_REDIRECT_URI,
    token: {
        // Wir brauchen initial nur den Refresh Token, Access holen wir uns neu
        access_token: process.env.QBO_ACCESS_TOKEN, 
        refresh_token: process.env.QBO_REFRESH_TOKEN,
        realmId: process.env.QBO_REALM_ID
    }
};

// SPEZIAL-CONFIG FÜR LOKALEN ZUGRIFF AUF DOCKER DB
const dbConfig = {
    user: process.env.DB_USER,
    // WICHTIG: Lokal ist es immer localhost
    host: 'localhost', 
    database: process.env.DB_NAME,
    password: process.env.DB_PASSWORD,
    // WICHTIG: Laut deinem docker-compose mapst du 5433 auf 5432!
    port: 5433, 
};

async function importCustomers() {
    const oauthClient = new OAuthClient(config);
    const pgClient = new Client(dbConfig);
    
    try {
        // console.log("🔄 1. Versuche Token zu erneuern...");
        // try {
        //     // Token Refresh erzwingen bevor wir starten
        //     const authResponse = await oauthClient.refresh();
        //     console.log("✅ Token erfolgreich erneuert!");
        //     // Optional: Das neue Token in der Session speichern, falls nötig
        // } catch (tokenErr) {
        //     console.error("❌ Token Refresh fehlgeschlagen. Prüfe QBO_REFRESH_TOKEN in .env");
        //     console.error(tokenErr.originalMessage || tokenErr);
        //     return; // Abbruch
        // }

        console.log(`🔌 2. Verbinde zur DB (Port ${dbConfig.port})...`);
        await pgClient.connect();
        console.log(`✅ DB Verbunden.`);

        // --- AB HIER DER NORMALE IMPORT ---
        let startPosition = 1;
        let totalProcessed = 0;
        let hasMore = true;

        while (hasMore) {
            let limitForThisBatch = 100;
            if (totalLimit) {
                const remaining = totalLimit - totalProcessed;
                if (remaining <= 0) break;
                limitForThisBatch = Math.min(100, remaining);
            }

            const query = `SELECT * FROM Customer STARTPOSITION ${startPosition} MAXRESULTS ${limitForThisBatch}`;
            console.log(`📡 QBO Request: Hole ${limitForThisBatch} Kunden ab Pos ${startPosition}...`);

            const baseUrl = config.environment === 'production' 
                ? 'https://quickbooks.api.intuit.com/' 
                : 'https://sandbox-quickbooks.api.intuit.com/';
            
            const response = await oauthClient.makeApiCall({
                url: `${baseUrl}v3/company/${config.token.realmId}/query?query=${encodeURI(query)}`,
                method: 'GET',
            });

            const data = response.getJson ? response.getJson() : response.json;
            const customers = data.QueryResponse?.Customer || [];

            console.log(`📥 QBO Response: ${customers.length} Kunden erhalten.`);

            if (customers.length === 0) {
                hasMore = false;
                break;
            }

            for (const c of customers) {
                try {
                    const rawPhone = c.PrimaryPhone?.FreeFormNumber || "";
                    const formattedAccountNumber = rawPhone.replace(/\D/g, ""); 

                    const sql = `
                        INSERT INTO customers (
                            name, line1, line2, line3, line4, city, state, zip_code, 
                            account_number, email, phone, phone2, taxable, qbo_id, qbo_sync_token, updated_at
                        ) VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10, $11, $12, $13, $14, $15, NOW())
                        ON CONFLICT (qbo_id) DO UPDATE SET
                            name = EXCLUDED.name,
                            line1 = EXCLUDED.line1,
                            line2 = EXCLUDED.line2,
                            line3 = EXCLUDED.line3,
                            line4 = EXCLUDED.line4,
                            city = EXCLUDED.city,
                            state = EXCLUDED.state,
                            zip_code = EXCLUDED.zip_code,
                            email = EXCLUDED.email,
                            phone = EXCLUDED.phone,
                            phone2 = EXCLUDED.phone2,
                            qbo_sync_token = EXCLUDED.qbo_sync_token,
                            taxable = EXCLUDED.taxable,
                            updated_at = NOW();
                    `;

                    const values = [
                        c.CompanyName || c.DisplayName,
                        c.BillAddr?.Line1 || null,
                        c.BillAddr?.Line2 || null,
                        c.BillAddr?.Line3 || null,
                        c.BillAddr?.Line4 || null,
                        c.BillAddr?.City || null,
                        c.BillAddr?.CountrySubDivisionCode || null,
                        c.BillAddr?.PostalCode || null,
                        formattedAccountNumber || null,
                        c.PrimaryEmailAddr?.Address || null,
                        c.PrimaryPhone?.FreeFormNumber || null,
                        c.AlternatePhone?.FreeFormNumber || null,
                        c.Taxable || false,
                        c.Id,
                        c.SyncToken
                    ];

                    await pgClient.query(sql, values);
                    totalProcessed++;
                    process.stdout.write("."); 
                } catch (rowError) {
                    console.error(`\n❌ DB Fehler bei Kunde ID ${c.Id}:`, rowError.message);
                }
            }
            console.log(""); 

            if (customers.length < limitForThisBatch) hasMore = false;
            startPosition += customers.length;
        }

        console.log(`\n🎉 Fertig! ${totalProcessed} Kunden verarbeitet.`);

    } catch (e) {
        console.error("\n💀 FATAL ERROR:", e.message);
        if(e.authResponse) console.log(JSON.stringify(e.authResponse, null, 2));
    } finally {
        await pgClient.end();
    }
}

importCustomers();