import { dirname } from "node:path";
import { fileURLToPath } from "node:url";
import importFrom from "import-from-esm";
import conventionalChangelogAngular from "conventional-changelog-angular";

/**
 * Load `conventional-changelog-parser` options. Handle presets that return either a `Promise<Array>` or a `Promise<Function>`.
 *
 * @param {Object} pluginConfig The plugin configuration.
 * @param {Object} pluginConfig.preset conventional-changelog preset ('angular', 'atom', 'codemirror', 'ember', 'eslint', 'express', 'jquery', 'jscs', 'jshint')
 * @param {string} pluginConfig.config Requireable npm package with a custom conventional-changelog preset
 * @param {Object} pluginConfig.parserOpts Additional `conventional-changelog-parser` options that will overwrite ones loaded by `preset` or `config`.
 * @param {Object} pluginConfig.writerOpts Additional `conventional-changelog-writer` options that will overwrite ones loaded by `preset` or `config`.
 * @param {Object} context The semantic-release context.
 * @param {Array<Object>} context.commits The commits to analyze.
 * @param {String} context.cwd The current working directory.
 *
 * @return {Promise<Object>} a `Promise` that resolve to the `conventional-changelog-core` config.
 */
export default async ({ preset, config, parserOpts, writerOpts, presetConfig }, { cwd }) => {
  let loadedConfig;
  const __dirname = dirname(fileURLToPath(import.meta.url));

  if (preset) {
    const presetPackage = `conventional-changelog-${preset.toLowerCase()}`;
    loadedConfig = await (
      (await importFrom.silent(__dirname, presetPackage)) || (await importFrom(cwd, presetPackage))
    )(presetConfig);
  } else if (config) {
    loadedConfig = await ((await importFrom.silent(__dirname, config)) || (await importFrom(cwd, config)))();
  } else {
    loadedConfig = await conventionalChangelogAngular();
  }

  return {
    commitOpts: loadedConfig.commits,
    parserOpts: { ...loadedConfig.parser, ...parserOpts },
    writerOpts: { ...loadedConfig.writer, ...writerOpts },
  };
};
