import {
  IsBoolean,
  IsIn,
  IsOptional,
  IsString,
  MinLength,
} from "class-validator";

/** Mirrors the Prisma `Currency` enum; a chequera's is fixed at creation. */
export const BANK_CURRENCIES = ["MXN", "USD"] as const;
export type BankAccountCurrency = (typeof BANK_CURRENCIES)[number];

/** Mirrors `TransactionDomain`. A soft hint on the account, never enforced. */
export const BANK_BUSINESS_LINES = ["UTILITY", "INSURANCE", "TRUST"] as const;
export type BankBusinessLine = (typeof BANK_BUSINESS_LINES)[number];

export class CreateBankDto {
  @IsString() @MinLength(1) name!: string;
  /** "MX" | "US" — free text, informational only. */
  @IsOptional() @IsString() country?: string;
}

export class UpdateBankDto {
  @IsOptional() @IsString() @MinLength(1) name?: string;
  @IsOptional() @IsString() country?: string;
}

export class CreateBankAccountDto {
  @IsString() @MinLength(1) bankId!: string;
  @IsString() @MinLength(1) label!: string;
  /**
   * Immutable after creation (no field for it on the update DTO): every
   * movement already booked into the account is denominated in it, so
   * changing it would silently re-denominate history.
   */
  @IsIn(BANK_CURRENCIES) currency!: BankAccountCurrency;
  @IsOptional() @IsIn(BANK_BUSINESS_LINES) businessLine?: BankBusinessLine;
  @IsOptional() @IsBoolean() active?: boolean;
}

export class UpdateBankAccountDto {
  @IsOptional() @IsString() @MinLength(1) bankId?: string;
  @IsOptional() @IsString() @MinLength(1) label?: string;
  @IsOptional() @IsIn(BANK_BUSINESS_LINES) businessLine?: BankBusinessLine;
  /** Closing an account hides it from the picker; its movements stay readable. */
  @IsOptional() @IsBoolean() active?: boolean;
}