export interface Transaction {
  id?: string;
  date: Date;
  description: string;
  amount: number; // Personal portion (after business split) in CAD
  totalAmount?: number; // Total original amount in CAD
  businessAmount?: number; // Business portion in CAD
  businessPercentage?: number; // Percentage attributed to business (0-100)
  originalAmount?: number; // Original amount before conversion
  originalCurrency?: string; // Original currency (CAD, EUR, etc.)
  currency?: string; // Current/display currency (for backward compatibility)
  category: string;
  type: "recurring" | "one-time";
  program?: string;
  status?: "actual" | "committed" | "projected";
  fundType?: "restricted" | "unrestricted";
  frequency?: "weekly" | "biweekly" | "monthly" | "quarterly" | "custom";
  customMonths?: number;
  endDate?: Date;
  probability: number;
  isConfirmed: boolean;
  isTest?: boolean;
  notes?: string;
  projectedDate?: Date;
  runningBalance?: number;
}

export interface RevenueOpportunity {
  _id?: string;
  id?: string;
  source: string;
  amount: number;
  probability: number;
  targetDate: Date;
  stage: string;
  notes?: string;
  createdAt?: Date;
  updatedAt?: Date;
}

export interface CashFlowProjection {
  date: Date;
  balance: number;
  inflow: number;
  outflow: number;
  netFlow: number;
  projectedBalance: number;
}

export interface RunwayScenarios {
  conservative: number;
  realistic: number;
  optimistic: number;
  cashOnly: number;
}

export interface CashPosition {
  balance: number;
  totalInflow: number;
  totalOutflow: number;
  netFlow: number;
}

export interface TransactionForecast {
  month: Date;
  recurring: Transaction[];
  oneTime: Transaction[];
  pipeline: Transaction[];
  totalInflow: number;
  totalOutflow: number;
  runningBalance: number;
}

export interface CombinedCashFlow {
  historical: CashFlowProjection[];
  projected: CashFlowProjection[];
  combined: CashFlowProjection[];
  currentBalanceIndex: number;
}

export interface AffordabilityCheck {
  canAfford: boolean;
  currentAvailable?: number;
  newBalance?: number;
  currentRunwayWeeks?: number;
  newRunwayWeeks?: number;
  riskLevel?: string;
  recommendation?: string;
  reason?: string;
  availableAmount?: number;
  shortfall?: number;
}