import { mergeDirs } from 'merge-dirs'

mergeDirs({
  // destination path of the merge operation
  dest: string

  /**
   * source paths to merge
   *
   * @example
   * ```ts
   * // 1. When a folder path is passed in,
   * // all files in the current folder will be merged to dest
   *
   * // dest: dest
   * // demo: src/demo/1.ts, src/demo/2.ts
   * mergeDirs({ dest: 'dest', path: ['src/demo'] })
   * // dest: dest/1.ts, dest/2.ts
   *
   * // 2. When a file path is passed in, the current file will be merged to dest
   *
   * // dest: dest
   * // demo: src/demo/1.ts
   * mergeDirs({ dest: 'dest', path: ['src/demo/1.ts'] })
   * // dest: dest/1.ts
   *
   * // 3. If you need to merge a single file under a folder and keep the folder path,
   * // you can use the options
   *
   * // dest: dest
   * // demo: src/demo/1.ts, src/demo/2.ts, src/demo2/2.ts
   * mergeDirs({ dest: 'dest', path: [{ rootDir: 'src', path: 'demo' }] })
   * // dest: dest/demo/1.ts, dest/demo/2.ts
   * ```
   */
  paths: (
    | string
    | {
        rootDir: string
        path: string
      }
  )[]

  /**
   * ignore errors when merging and continue with subsequent merges
   *
   * @default false
   */
  ignoreErrors?: boolean

  /**
   * ignore empty folders, if true, empty folders will not be merged into dest
   *
   * @default false
   */
  ignoreEmptyFolders?: boolean

  /**
   * How to resolve file conflicts, optional with:
   *
   * 'overwrite' | 'skip' | ((source: string, dest: string) => string)
   *
   * If you want to customize the conflict resolver,
   * please return the path where the files need to be merged eventually,
   * the valid values are source or dest or any filename in the same directory as dest
   *
   * @default 'overwrite'
   *
   * 'overwrite' | 'skip' | ((source: string, dest: string) => string)
   */
  conflictResolution?: ConflictResolution | ConflictResolver
})