const cache = require('../cache');

async function getSupplyChainData() {
  const flows = [
    { from: 'China', to: 'Rotterdam', value: 42.5, delay: 2.1, mode: 'Sea' },
    { from: 'VS', to: 'Rotterdam', value: 18.2, delay: 1.4, mode: 'Sea' },
    { from: 'Duitsland', to: 'Amsterdam', value: 12.8, delay: 0.6, mode: 'Road' },
    { from: 'België', to: 'Rotterdam', value: 9.4, delay: 0.4, mode: 'Road' },
    { from: 'VK', to: 'Rotterdam', value: 7.1, delay: 1.8, mode: 'Sea' },
    { from: 'India', to: 'Rotterdam', value: 5.2, delay: 3.2, mode: 'Sea' }
  ];

  const throughput = Array.from({ length: 12 }, (_, i) => ({
    month: ['J', 'F', 'M', 'A', 'M', 'J', 'J', 'A', 'S', 'O', 'N', 'D'][i],
    rotterdam: Math.round(820 + Math.sin(i / 2) * 40 + i * 3),
    amsterdam: Math.round(95 + Math.sin(i / 3) * 8 + i * 0.5),
    antwerp: Math.round(210 + Math.cos(i / 2) * 15)
  }));

  const modeSplit = [
    { name: 'Zee', value: 68, fill: '#f59e0b' },
    { name: 'Weg', value: 22, fill: '#00d4ff' },
    { name: 'Spoor', value: 7, fill: '#22c55e' },
    { name: 'Lucht', value: 3, fill: '#7c3aed' }
  ];

  const delayByRoute = flows.map(f => ({ route: `${f.from}→${f.to}`, delay: f.delay, volume: f.value }));

  const portLocations = [
    { name: 'Rotterdam', lat: 51.95, lng: 4.12, throughput: 868, risk: 34 },
    { name: 'Amsterdam', lat: 52.37, lng: 4.90, throughput: 98, risk: 22 },
    { name: 'Moerdijk', lat: 51.72, lng: 4.62, throughput: 45, risk: 18 }
  ];

  const insights = [
    { type: 'warn', label: 'Risico', text: '72% import via top-3 landen — concentratierisico zichtbaar in flow view.' },
    { type: 'info', label: 'Haven', text: 'Rotterdam 868M ton — koppel ETA-data voor proactieve vertraging-alerts.' },
    { type: 'ok', label: 'Actie', text: 'Multimodaal split toont waar rail/barge investering ROI heeft.' },
    { type: 'warn', label: 'Vertraging', text: `Gem. vertraging ${+(flows.reduce((a, f) => a + f.delay, 0) / flows.length).toFixed(1)} d — India-route 3.2d monitor.` },
    { type: 'info', label: 'Throughput', text: 'Rotterdam +3% YoY — Antwerpen concurrentie in zelfde view.' },
    { type: 'ok', label: 'Integratie', text: 'ERP/WMS ETA feed → SSE alerts — zelfde Global Ops shell als andere verticals.' }
  ];

  const contextBlocks = [
    { title: 'Waarom Supply Chain Tower?', body: 'Logistiek directeuren missen vaak één view op havens, routes, vertraging en concentratierisico — tot er disruption is.' },
    { title: 'Wat u hier ziet', body: 'Import flows, haven throughput trends, multimodaal split, route delays — refresh elke 2,5 seconden.' },
    { title: 'Technische aanpak Mek-Tech', body: 'Eurostat COMEXT + haven open data + eigen ERP koppeling. Lightweight SSE i.p.v. zware SCM suite.' },
    { title: 'ROI voor uw organisatie', body: 'Proactieve vertraging-alerts, betere modal shift beslissingen, lagere voorraad-buffer.' },
    { title: 'Productie-architectuur', body: 'Port API + AIS + ERP → event hub → dit dashboard. Drill-down per shipment optioneel.' },
    { title: 'Volgende stap', body: 'Pilot Rotterdam–warehouse corridor met ETA alerts — live binnen 4 weken.' }
  ];

  return {
    ts: new Date().toISOString(),
    refreshMs: 2500,
    totalThroughput: 868, throughputYoy: 3.2, flows, throughput,
    riskScore: 34, concentrationTop3: 72.5, modeSplit, delayByRoute, portLocations, insights, contextBlocks,
    avgDelay: +(flows.reduce((a, f) => a + f.delay, 0) / flows.length).toFixed(1),
    activeRoutes: flows.length,
    delayedRoutes: flows.filter(f => f.delay > 2).length,
    context: {
      pitch: 'Global Supply Chain Control Tower — havens, flows & risico live.',
      deployment: 'Eurostat COMEXT · Port of Rotterdam · CBS Logistiek'
    }
  };
}

module.exports = { getSupplyChainData };