// Reference Range Management Functions

export const signOptions = [
  { value: 'GE', label: '≥', description: 'Greater than or equal to' },
  { value: 'GT', label: '>', description: 'Greater than' },
  { value: 'LE', label: '≤', description: 'Less than or equal to' },
  { value: 'LT', label: '<', description: 'Less than' }
];

export const flagOptions = [
  { value: 'N', label: 'N', description: 'Normal' },
  { value: 'L', label: 'L', description: 'Low' },
  { value: 'H', label: 'H', description: 'High' },
  { value: 'C', label: 'C', description: 'Critical' }
];

export const refTypeOptions = [
  { value: 'REF', label: 'REF', description: 'Reference Range' },
  { value: 'CRTC', label: 'CRTC', description: 'Critical Range' },
  { value: 'VAL', label: 'VAL', description: 'Validation Range' },
  { value: 'RERUN', label: 'RERUN', description: 'Rerun Range' },
  { value: 'THOLD', label: 'THOLD', description: 'Threshold Range' }
];

export const textRefTypeOptions = [
  { value: 'TEXT', label: 'TEXT', description: 'Text Reference' },
  { value: 'VSET', label: 'VSET', description: 'Value Set Reference' }
];

export const sexOptions = [
  { value: '2', label: 'Male' },
  { value: '1', label: 'Female' },
  { value: '0', label: 'Any' }
];

export function createNumRef() {
  return {
    RefType: 'REF',
    Sex: '0',
    LowSign: 'GE',
    HighSign: 'LE',
    Low: null,
    High: null,
    AgeStart: 0,
    AgeEnd: 120,
    Flag: 'N',
    Interpretation: '',
    SpcType: '',
    Criteria: ''
  };
}

export function createTholdRef() {
  return {
    RefType: 'THOLD',
    Sex: '0',
    LowSign: 'GE',
    HighSign: 'LE',
    Low: null,
    High: null,
    AgeStart: 0,
    AgeEnd: 120,
    Flag: 'N',
    Interpretation: '',
    SpcType: '',
    Criteria: ''
  };
}

export function createTextRef() {
  return {
    RefType: 'TEXT',
    Sex: '0',
    AgeStart: 0,
    AgeEnd: 120,
    RefTxt: '',
    Flag: 'N',
    SpcType: '',
    Criteria: ''
  };
}

export function createVsetRef() {
  return {
    RefType: 'VSET',
    Sex: '0',
    AgeStart: 0,
    AgeEnd: 120,
    RefTxt: '',
    Flag: 'N',
    SpcType: '',
    Criteria: ''
  };
}

export function validateNumericRange(ref, index) {
  const errors = [];
  if (ref.Low !== null && ref.High !== null && ref.Low > ref.High) {
    errors.push(`Range ${index + 1}: Low value cannot be greater than High value`);
  }
  if (ref.AgeStart !== null && ref.AgeEnd !== null && ref.AgeStart > ref.AgeEnd) {
    errors.push(`Range ${index + 1}: Age start cannot be greater than Age end`);
  }
  return errors;
}

// Alias for threshold validation (same logic)
export const validateTholdRange = validateNumericRange;

export function validateTextRange(ref, index) {
  const errors = [];
  if (ref.AgeStart !== null && ref.AgeEnd !== null && ref.AgeStart > ref.AgeEnd) {
    errors.push(`Range ${index + 1}: Age start cannot be greater than Age end`);
  }
  return errors;
}

// Alias for value set validation (same logic)
export const validateVsetRange = validateTextRange;