import { MongoClient } from 'mongodb';
import { execSync } from 'child_process';
import crypto from 'crypto';

const MONGO_URI = "mongodb+srv://admtracksteel:mongodb26@cluster0.a4xiilu.mongodb.net/ts_gpi";
const DB_NAME = "ts_gpi";
const DEFAULT_ORG_ID = "e47e6210-4879-4e5b-bf21-9285d2713123";

const client = new MongoClient(MONGO_URI);

// Map Mongo _id -> Supabase UUID
const idMap = new Map();

function getUUID(mongoId) {
    if (!mongoId) return null;
    const mid = mongoId.toString();
    if (idMap.has(mid)) return idMap.get(mid);
    const newUuid = crypto.randomUUID();
    idMap.set(mid, newUuid);
    return newUuid;
}

function sqlSafe(val) {
    if (val === null || val === undefined) return 'NULL';
    if (val instanceof Date) return `'${val.toISOString()}'`;
    if (Array.isArray(val)) return `'{"${val.join('","')}"}'`;
    if (typeof val === 'object' && val.toString) {
        const s = val.toString();
        return `'${s.replace(/'/g, "''")}'`;
    }
    if (typeof val === 'string') return `'${val.replace(/'/g, "''")}'`;
    return val;
}

async function run() {
    try {
        await client.connect();
        console.log("🚀 Conectado ao MongoDB Atlas...");
        const db = client.db(DB_NAME);

        // 1. Mapear Projetos primeiro
        const mongoProjects = await db.collection('projects').find().toArray();
        console.log(`📦 Encontrados ${mongoProjects.length} projetos.`);
        
        let projectInserts = [];
        for (const p of mongoProjects) {
            const uuid = getUUID(p._id);
            projectInserts.push(`INSERT INTO gpi.projects (id, organization_id, name, client, start_date, end_date, environment, technician, weight_kg, status, created_at, updated_at) VALUES (${sqlSafe(uuid)}, ${sqlSafe(DEFAULT_ORG_ID)}, ${sqlSafe(p.name)}, ${sqlSafe(p.client)}, ${sqlSafe(p.startDate)}, ${sqlSafe(p.endDate)}, ${sqlSafe(p.environment)}, ${sqlSafe(p.technician)}, ${sqlSafe(p.weightKg)}, 'active', ${sqlSafe(p.createdAt)}, ${sqlSafe(p.updatedAt)});`);
        }

        // 2. Mapear Biblioteca de Tintas (Technical Data Sheets)
        const mongoTDS = await db.collection('technicaldatasheets').find().toArray();
        console.log(`📚 Encontradas ${mongoTDS.length} fichas técnicas.`);
        let tdsInserts = [];
        for (const t of mongoTDS) {
            const uuid = getUUID(t._id);
            tdsInserts.push(`INSERT INTO gpi.technical_data_sheets (id, organization_id, name, manufacturer, manufacturer_code, type, min_stock, typical_application, solids_volume, mixing_ratio, yield_theoretical, wft_min, wft_max, dft_min, dft_max, reducer, mixing_ratio_weight, mixing_ratio_volume, dft_reference, yield_factor, dilution, notes, created_at, updated_at) VALUES (${sqlSafe(uuid)}, ${sqlSafe(DEFAULT_ORG_ID)}, ${sqlSafe(t.name)}, ${sqlSafe(t.manufacturer)}, ${sqlSafe(t.manufacturerCode)}, ${sqlSafe(t.type)}, ${sqlSafe(t.minStock)}, ${sqlSafe(t.typicalApplication)}, ${sqlSafe(t.solidsVolume)}, ${sqlSafe(t.mixingRatio)}, ${sqlSafe(t.yieldTheoretical)}, ${sqlSafe(t.wftMin)}, ${sqlSafe(t.wftMax)}, ${sqlSafe(t.dftMin)}, ${sqlSafe(t.dftMax)}, ${sqlSafe(t.reducer)}, ${sqlSafe(t.mixingRatioWeight)}, ${sqlSafe(t.mixingRatioVolume)}, ${sqlSafe(t.dftReference)}, ${sqlSafe(t.yieldFactor)}, ${sqlSafe(t.dilution)}, ${sqlSafe(t.notes)}, ${sqlSafe(t.createdAt)}, ${sqlSafe(t.updatedAt)});`);
        }

        // 3. Mapear Esquemas de Pintura
        const mongoSchemes = await db.collection('paintingschemes').find().toArray();
        console.log(`🎨 Encontrados ${mongoSchemes.length} esquemas de pintura.`);
        let schemeInserts = [];
        for (const s of mongoSchemes) {
            const uuid = crypto.randomUUID();
            const projectId = getUUID(s.projectId);
            schemeInserts.push(`INSERT INTO gpi.painting_schemes (id, organization_id, project_id, name, type, coat, solids_volume, yield_theoretical, eps_min, eps_max, dilution, manufacturer, color, paint_consumption, thinner_consumption, paint_id, thinner_id, color_hex, thinner_symbol, notes, created_at, updated_at) VALUES (${sqlSafe(uuid)}, ${sqlSafe(DEFAULT_ORG_ID)}, ${sqlSafe(projectId)}, ${sqlSafe(s.name)}, ${sqlSafe(s.type)}, ${sqlSafe(s.coat)}, ${sqlSafe(s.solidsVolume)}, ${sqlSafe(s.yieldTheoretical)}, ${sqlSafe(s.epsMin)}, ${sqlSafe(s.epsMax)}, ${sqlSafe(s.dilution)}, ${sqlSafe(s.manufacturer)}, ${sqlSafe(s.color)}, ${sqlSafe(s.paintConsumption)}, ${sqlSafe(s.thinnerConsumption)}, ${sqlSafe(s.paintId)}, ${sqlSafe(s.thinnerId)}, ${sqlSafe(s.colorHex)}, ${sqlSafe(s.thinnerSymbol)}, ${sqlSafe(s.notes)}, NOW(), NOW());`);
        }

        // 4. Mapear Peças (Parts)
        const mongoParts = await db.collection('parts').find().toArray();
         console.log(`🧩 Encontradas ${mongoParts.length} peças.`);
        let partsInserts = [];
        for (const pt of mongoParts) {
            const uuid = getUUID(pt._id);
            const projectId = getUUID(pt.projectId);
            partsInserts.push(`INSERT INTO gpi.parts (id, organization_id, project_id, description, dimensions, weight, type, area, quantity, notes, created_at, updated_at) VALUES (${sqlSafe(uuid)}, ${sqlSafe(DEFAULT_ORG_ID)}, ${sqlSafe(projectId)}, ${sqlSafe(pt.description)}, ${sqlSafe(pt.dimensions)}, ${sqlSafe(pt.weight)}, ${sqlSafe(pt.type)}, ${sqlSafe(pt.area)}, ${sqlSafe(pt.quantity)}, ${sqlSafe(pt.notes)}, NOW(), NOW());`);
        }

        // Executar SQL
        const allSQL = [...projectInserts, ...tdsInserts, ...schemeInserts, ...partsInserts].join('\n');
        
        console.log("💾 Executando SQL no Supabase...");
        
        // Escrever para arquivo temporário
        const fs = await import('fs');
        fs.writeFileSync('/tmp/bulk_migration.sql', allSQL);

        // Executar via docker
        execSync(`docker exec -i supabase-db-h0oggskgs0ws0sco8kc4s8ws psql -U supabase_admin -d postgres < /tmp/bulk_migration.sql`);

        console.log("✅ Migração Concluída com Sucesso!");

    } catch (e) {
        console.error("❌ ERRO DURANTE MIGRAÇÃO:", e.message);
    } finally {
        await client.close();
    }
}

run();