export const validation = {
  isValidEmail(email: string): boolean {
    const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
    return emailRegex.test(email);
  },

  isValidAmount(amount: string | number): boolean {
    const num = typeof amount === 'string' ? parseFloat(amount) : amount;
    return !isNaN(num) && num > 0;
  },

  isNonEmpty(value: string): boolean {
    return value.trim().length > 0;
  },

  minLength(value: string, min: number): boolean {
    return value.trim().length >= min;
  },

  maxLength(value: string, max: number): boolean {
    return value.trim().length <= max;
  },

  isPositiveNumber(value: string | number): boolean {
    const num = typeof value === 'string' ? parseFloat(value) : value;
    return !isNaN(num) && num > 0;
  },

  isNonNegativeNumber(value: string | number): boolean {
    const num = typeof value === 'string' ? parseFloat(value) : value;
    return !isNaN(num) && num >= 0;
  },

  validateForm<T extends Record<string, any>>(
    values: T,
    rules: Partial<Record<keyof T, (value: any) => string | null>>
  ): Partial<Record<keyof T, string>> {
    const errors: Partial<Record<keyof T, string>> = {};

    for (const field in rules) {
      const validator = rules[field];
      if (validator) {
        const error = validator(values[field]);
        if (error) {
          errors[field] = error;
        }
      }
    }

    return errors;
  },
};