export enum Interval {
  UNISON,
  MINOR_SECOND,
  MAJOR_SECOND,
  MINOR_THIRD,
  MAJOR_THIRD,
  PERFECT_FOURTH,
  DIMINISHED_FIFTH,
  PERFECT_FIFTH,
  AUGMENTED_FIFTH,
  MAJOR_SIXTH,
  DIMINISHED_SEVENTH = MAJOR_SIXTH,
  MINOR_SEVENTH,
  MAJOR_SEVENTH,
  OCTAVE,
  MINOR_NINTH,
  MAJOR_NINTH,
  AUGMENTED_NINTH,
  TENTH,
  MINOR_ELEVENTH,
  MAJOR_ELEVENTH,
  TWELFTH,
  MINOR_THIRTEENTH,
  MAJOR_THIRTEENTH,
  AUGMENTED_THIRTEENTH,
}

export enum ChordBase {
  MAJOR = 'MAJOR',
  MINOR = 'MINOR',
  DIMINISHED = 'DIMINISHED',
  AUGMENTED = 'AUGMENTED',
}

export enum ChordExtensionType {
  MAJOR = 'MAJOR',
  MINOR = 'MINOR',
  DOMINANT = 'DOMINANT',
  DIMINISHED = 'DIMINISHED',
  AUGMENTED = 'AUGMENTED',
}

export enum ChordModificationType {
  SUSPENDED = 'SUSPENDED',
  LOWERED = 'LOWERED',
}

export enum ChordComponent {
  ROOT = 'ROOT',
  SECOND = 'SECOND',
  THIRD = 'THIRD',
  FOURTH = 'FOURTH',
  FIFTH = 'FIFTH',
  SIXTH = 'SIXTH',
  SEVENTH = 'SEVENTH',
  NINTH = 'NINTH',
  ELEVENTH = 'ELEVENTH',
  THIRTEENTH = 'THIRTEENTH',
}

export const CHORD_COMPONENT_ORDERS = [
  ChordComponent.ROOT,
  ChordComponent.SECOND,
  ChordComponent.THIRD,
  ChordComponent.FOURTH,
  ChordComponent.FIFTH,
  ChordComponent.SIXTH,
  ChordComponent.SEVENTH,
  ChordComponent.NINTH,
  ChordComponent.ELEVENTH,
  ChordComponent.THIRTEENTH,
];

export interface ChordModification {
  type: ChordModificationType;
  component: ChordComponent;
}

export interface ChordExtension {
  type: ChordExtensionType;
  component: ChordComponent;
}

export interface ChordAnalysis {
  base?: ChordBase;
  modifications?: ChordModification[];
  extensions?: ChordExtension[];
  omissions?: ChordComponent[];
}