import { 
  calculateIRR, 
  calculateCapRate, 
  calculateSAFEConversion,
  calculateLBO,
  calculateDCF
} from '@dfx/financial-calculators';

// IRR Calculation
const cashFlows = [-100000, 30000, 40000, 50000, 60000];
const irr = calculateIRR(cashFlows);
console.log(irr); // 0.2354 (23.54%)

// Cap Rate
const capRate = calculateCapRate(500000, 10000000);
console.log(capRate); // 5.0 (5.0%)

// Property Value from Target Cap Rate
const propertyValue = calculatePropertyValue(500000, 5.5);
console.log(propertyValue); // $9,090,909

import { calculateIRR, calculateNPV, calculateMIRR, calculateXIRR } from '@dfx/financial-calculators/irr';

// Basic IRR
const irr = calculateIRR([-100000, 30000, 40000, 50000, 60000]);

// NPV at 10% discount rate
const npv = calculateNPV([-100000, 30000, 40000, 50000, 60000], 0.10);

// MIRR with different financing and reinvestment rates
const mirr = calculateMIRR(cashFlows, 0.08, 0.12); // 8% financing, 12% reinvestment

// XIRR with irregular dates
const xirr = calculateXIRR(
  [-100000, 30000, 45000, 60000],
  [new Date('2024-01-01'), new Date('2024-06-15'), new Date('2025-01-01'), new Date('2025-09-30')]
);

import { 
  calculateCapRate, 
  calculatePropertyValue,
  getMarketBenchmark,
  assessCapRate,
  generateCapRateScenarios,
  MARKET_BENCHMARKS
} from '@dfx/financial-calculators/cap-rate';

// Basic cap rate
const capRate = calculateCapRate(500000, 10000000); // NOI / Price

// Reverse: value from cap rate
const value = calculatePropertyValue(500000, 5.5);

// Market benchmarks
const benchmark = getMarketBenchmark('MULTIFAMILY', 'classA');
console.log(benchmark); // { low: 4.25, mid: 4.75, high: 5.25 }

// Assess a property
const assessment = assessCapRate(5.5, 'MULTIFAMILY');
console.log(assessment); // { class: 'classB', label: 'Class B', description: 'Value-add opportunity' }

// Sensitivity analysis
const scenarios = generateCapRateScenarios(500000, 10000000);
// Returns array of price impacts at different cap rate changes

import { 
  calculateSAFEConversion,
  calculateSAFEOwnership,
  compareSAFEScenarios,
  type SAFEInstrument 
} from '@dfx/financial-calculators/safe';

const instruments: SAFEInstrument[] = [
  {
    id: 'safe-1',
    name: 'YC SAFE',
    type: 'safe_post',
    principal: 500000,
    valuationCap: 10000000,
  },
  {
    id: 'safe-2',
    name: 'Angel SAFE',
    type: 'safe_post',
    principal: 250000,
    valuationCap: 8000000,
    discount: 0.20,
  },
  {
    id: 'note-1',
    name: 'Convertible Note',
    type: 'convertible_note',
    principal: 100000,
    valuationCap: 12000000,
    discount: 0.15,
    interestRate: 0.06,
    termMonths: 18,
  }
];

const result = calculateSAFEConversion({
  instruments,
  preMoneyValuation: 15000000,
  newInvestmentAmount: 3000000,
  foundersShares: 10000000,
  optionPoolPercent: 0.10,
  optionPoolOnPreMoney: true,
});

console.log(result.pricePerShare);
console.log(result.postMoneyValuation);
console.log(result.founderDilution); // 0.45 (45%)
console.log(result.capTable);
console.log(result.conversionDetails);
console.log(result.warnings);

import {
  calculateLBO,
  runSensitivity,
  type LBOInputs
} from '@dfx/financial-calculators/lbo';

const inputs: LBOInputs = {
  enterpriseValue: 100000000,
  entryEbitda: 12500000,
  holdPeriodYears: 5,
  operatingAssumptions: {
    revenueGrowthRates: [0.10, 0.08, 0.06, 0.05, 0.04],
    ebitdaMargins: [0.20, 0.21, 0.22, 0.23, 0.24],
    capexPercentRevenue: 0.02,
    nwcPercentRevenue: 0.10,
    taxRate: 0.25,
  },
  exitMultiple: 9.0,
  capitalStructure: {
    seniorDebt: { name: 'Term Loan', amount: 60000000, interestRate: 0.07, amortizationYears: 7 },
    equityContribution: 40000000,
  },
};

const result = calculateLBO(inputs);

console.log(result.returns.irr);            // 0.25 (25% IRR)
console.log(result.returns.moic);           // 2.8x MOIC
console.log(result.exitMetrics);            // Exit metrics
console.log(result.yearlyProjections);      // Year-by-year financials
console.log(result.debtSchedules);          // Debt paydown schedules

import { 
  calculateDCF,
  analyzeComparables,
  calculateRuleOf40,
  calculateSaaSValuation,
  calculateVentureValuation,
  calculateWACC,
  type DCFInputs 
} from '@dfx/financial-calculators/valuation';

// DCF Valuation
const dcfResult = calculateDCF({
  projectedCashFlows: [1000000, 1100000, 1210000, 1331000, 1464100],
  discountRate: 0.12,
  terminalGrowthRate: 0.03,
  netDebt: 2000000,
});

console.log(dcfResult.enterpriseValue);
console.log(dcfResult.equityValue);
console.log(dcfResult.pvTerminalValue);
console.log(dcfResult.impliedTerminalMultiple);

// Comparable Company Analysis
const compResult = analyzeComparables(
  [
    { name: 'Comp A', value: 500000000, ebitda: 50000000, revenue: 200000000 },
    { name: 'Comp B', value: 400000000, ebitda: 40000000, revenue: 180000000 },
    { name: 'Comp C', value: 600000000, ebitda: 55000000, revenue: 250000000 },
  ],
  { ebitda: 45000000, revenue: 190000000 }
);

console.log(compResult.medianEVEBITDA);
console.log(compResult.impliedValuations);

// SaaS Valuation
const saasResult = calculateSaaSValuation(
  5000000,  // ARR
  0.80,     // 80% growth
  1.20,     // 120% NRR
  0.75      // 75% gross margin
);

console.log(saasResult.adjustedMultiple);
console.log(saasResult.valuation);
console.log(saasResult.factors);

// Rule of 40
const rule40 = calculateRuleOf40({ revenueGrowth: 0.50, profitMargin: -0.05 });
console.log(rule40.score);     // 45
console.log(rule40.passing);   // true
console.log(rule40.assessment);

// Venture Valuation
const ventureResult = calculateVentureValuation(0.20, 2000000);
console.log(ventureResult.postMoneyValuation); // $10M
console.log(ventureResult.preMoneyValuation);  // $8M

// WACC
const wacc = calculateWACC(
  80000000,  // Equity value
  20000000,  // Debt value
  0.12,      // Cost of equity
  0.06,      // Cost of debt
  0.25       // Tax rate
);

import { formatCurrency, formatPercent, formatMultiple } from '@dfx/financial-calculators';

formatCurrency(1500000);    // "$1.50M"
formatCurrency(2500000000); // "$2.50B"
formatPercent(0.2354);      // "23.54%"
formatMultiple(2.8);        // "2.80x"