#!/usr/bin/env node
/**
 * Fix downstream pressure simulator ranges and add a monitoring debug node.
 *
 * Problems found:
 * 1. Downstream pressure simulator range 0-5000 mbar is unrealistic.
 *    Real WWTP system backpressure: 800-1500 mbar (0.8-1.5 bar).
 *    The pump curve operates in 700-3900 mbar.  With upstream ~300 mbar
 *    (hydrostatic from 3m basin) and downstream at 5000 mbar, the
 *    pressure differential pushes the curve to extreme predictions.
 *
 * 2. No way to see runtime state visually.  We'll leave visual monitoring
 *    to the Grafana/dashboard layer, but fix the root cause here.
 *
 * Fix: Set downstream pressure simulators to realistic ranges:
 *   - West:  o_min=800, o_max=1500, i_min=800, i_max=1500
 *   - North: o_min=600, o_max=1200, i_min=600, i_max=1200
 *   - South: o_min=500, o_max=1000, i_min=500, i_max=1000
 *
 * This keeps pressure differential in ~500-1200 mbar range,
 * well within the pump curve (700-3900 mbar).
 */

const fs = require('fs');
const path = require('path');

const flowPath = path.join(__dirname, '..', 'docker', 'demo-flow.json');
const flow = JSON.parse(fs.readFileSync(flowPath, 'utf8'));

let changes = 0;

// Fix downstream pressure simulator ranges
const pressureFixes = {
  'demo_meas_pt_w_down': { i_min: 800, i_max: 1500, o_min: 800, o_max: 1500 },
  'demo_meas_pt_n_down': { i_min: 600, i_max: 1200, o_min: 600, o_max: 1200 },
  'demo_meas_pt_s_down': { i_min: 500, i_max: 1000, o_min: 500, o_max: 1000 },
};

flow.forEach(node => {
  const fix = pressureFixes[node.id];
  if (fix) {
    const old = { i_min: node.i_min, i_max: node.i_max, o_min: node.o_min, o_max: node.o_max };
    Object.assign(node, fix);
    console.log(`Fixed ${node.id} "${node.name}":`);
    console.log(`  Was: i=[${old.i_min},${old.i_max}] o=[${old.o_min},${old.o_max}]`);
    console.log(`  Now: i=[${fix.i_min},${fix.i_max}] o=[${fix.o_min},${fix.o_max}]`);
    changes++;
  }
});

// Also fix upstream pressure ranges to match realistic hydrostatic range
// Basin level 0-4m → hydrostatic 0-392 mbar → use 0-500 mbar range
const upstreamFixes = {
  'demo_meas_pt_w_up': { i_min: 0, i_max: 500, o_min: 0, o_max: 500 },
  'demo_meas_pt_n_up': { i_min: 0, i_max: 400, o_min: 0, o_max: 400 },
  'demo_meas_pt_s_up': { i_min: 0, i_max: 300, o_min: 0, o_max: 300 },
};

flow.forEach(node => {
  const fix = upstreamFixes[node.id];
  if (fix) {
    const old = { i_min: node.i_min, i_max: node.i_max, o_min: node.o_min, o_max: node.o_max };
    Object.assign(node, fix);
    console.log(`Fixed ${node.id} "${node.name}":`);
    console.log(`  Was: i=[${old.i_min},${old.i_max}] o=[${old.o_min},${old.o_max}]`);
    console.log(`  Now: i=[${fix.i_min},${fix.i_max}] o=[${fix.o_min},${fix.o_max}]`);
    changes++;
  }
});

fs.writeFileSync(flowPath, JSON.stringify(flow, null, 2) + '\n');
console.log(`\nDone. ${changes} node(s) updated.`);