export type DiffLineParts = {
  prefix: string;
  content: string;
};

export enum LineType {
  INSERT = 'insert',
  DELETE = 'delete',
  CONTEXT = 'context',
}

export interface DiffLineDeleted {
  type: LineType.DELETE;
  oldNumber: number;
  newNumber: undefined;
}

export interface DiffLineInserted {
  type: LineType.INSERT;
  oldNumber: undefined;
  newNumber: number;
}

export interface DiffLineContext {
  type: LineType.CONTEXT;
  oldNumber: number;
  newNumber: number;
}

export type DiffLineContent = {
  content: string;
};

export type DiffLine = (DiffLineDeleted | DiffLineInserted | DiffLineContext) & DiffLineContent;

export interface DiffBlock {
  oldStartLine: number;
  oldStartLine2?: number;
  newStartLine: number;
  header: string;
  lines: DiffLine[];
}

export interface DiffFileName {
  oldName: string;
  newName: string;
}

export interface DiffFile extends DiffFileName {
  addedLines: number;
  deletedLines: number;
  isCombined: boolean;
  isGitDiff: boolean;
  language: string;
  blocks: DiffBlock[];
  oldMode?: string | string[];
  newMode?: string;
  deletedFileMode?: string;
  newFileMode?: string;
  isDeleted?: boolean;
  isNew?: boolean;
  isCopy?: boolean;
  isRename?: boolean;
  isBinary?: boolean;
  isTooBig?: boolean;
  unchangedPercentage?: number;
  changedPercentage?: number;
  checksumBefore?: string | string[];
  checksumAfter?: string;
  mode?: string;
}

export type OutputFormatType = 'line-by-line' | 'side-by-side';

export const OutputFormatType: { [_: string]: OutputFormatType } = {
  LINE_BY_LINE: 'line-by-line',
  SIDE_BY_SIDE: 'side-by-side',
};

export type LineMatchingType = 'lines' | 'words' | 'none';

export const LineMatchingType: { [_: string]: LineMatchingType } = {
  LINES: 'lines',
  WORDS: 'words',
  NONE: 'none',
};

export type DiffStyleType = 'word' | 'char';

export const DiffStyleType: { [_: string]: DiffStyleType } = {
  WORD: 'word',
  CHAR: 'char',
};

export enum ColorSchemeType {
  AUTO = 'auto',
  DARK = 'dark',
  LIGHT = 'light',
}