import type { SourceUnit } from 'solidity-ast';
import type { DocItem } from './doc-item';
import type { PageAssigner, PageStructure } from './site';

export interface UserConfig {
  /**
   * The directory where rendered pages will be written.
   * Defaults to 'docs'.
   */
  outputDir?: string;

  /**
   * A directory of custom templates that should take precedence over the
   * theme's templates.
   */
  templates?: string;

  /**
   * The name of the built-in templates that will be used by default.
   * Defaults to 'markdown'.
   */
  theme?: string;

  /**
   * The way documentable items (contracts, functions, custom errors, etc.)
   * will be organized in pages. Built in options are:
   * - 'single': all items in one page
   * - 'items': one page per item
   * - 'files': one page per input Solidity file
   * More customization is possible by defining a function that returns a page
   * path given the AST node for the item and the source unit where it is
   * defined.
   * Defaults to 'single'.
   */
  pages?: 'single' | 'items' | 'files' | PageAssigner;

  /**
   * An array of sources subdirectories that should be excluded from
   * documentation, relative to the contract sources directory.
   */
  exclude?: string[];

  /**
   * Clean up the output by collapsing 3 or more contiguous newlines into only 2.
   * Enabled by default.
   */
  collapseNewlines?: boolean;

  /**
   * The extension for generated pages.
   * Defaults to '.md'.
   */
  pageExtension?: string;
}

////////////////////////////////////////////////////////////////////////////////////////////////////

// Other config parameters that will be provided by the environment (e.g. Hardhat)
// rather than by the user manually, unless using the library directly.
export interface Config extends UserConfig {
  /**
   * The root directory relative to which 'outputDir', 'sourcesDir', and
   * 'templates' are specified. Defaults to the working directory.
   */
  root?: string;

  /**
   * The Solidity sources directory.
   */
  sourcesDir?: string;
}

export type FullConfig = Required<Config>;

export const defaults: Omit<FullConfig, 'templates'> = {
  root: process.cwd(),
  sourcesDir: 'contracts',
  outputDir: 'docs',
  pages: 'single',
  exclude: [],
  theme: 'markdown',
  collapseNewlines: true,
  pageExtension: '.md',
};