/*
 * SPDX-FileCopyrightText: 2023 Kevin de Jong <monkaii@hotmail.com>
 * SPDX-License-Identifier: MIT
 */

import * as core from "@actions/core";
import type { components as octokitComponents } from "@octokit/openapi-types";

type Repository = octokitComponents["schemas"]["repository"];

/**
 * Checks the repository merge configuration;
 * - Whether merge commits are enabled and whether the default subject is based on the Pull Request title
 * - Whether squash commits are enabled and whether the default subject is based on the Pull Request title
 * - Whether rebase commits are enabled
 */
export function checkConfiguration(repository: Repository): void {
  if (
    repository.allow_merge_commit === undefined ||
    repository.allow_squash_merge === undefined ||
    repository.allow_rebase_merge === undefined
  ) {
    throw new Error(
      "❌ CommitMe is not configured correctly. Please provide either:\n - The `contents: write` permission, or\n - Use the `include-commits` input parameter."
    );
  }

  if (repository.allow_merge_commit) {
    core.info(
      repository.merge_commit_title === "PR_TITLE"
        ? "✅ Default merge commit subject will use the Pull Request title."
        : "⚠️ Default merge commit subject is not based on your Pull Request title."
    );
  } else {
    core.info("ℹ️ Merge commit strategy is disabled.");
  }

  if (repository.allow_squash_merge === true) {
    core.info(
      repository.squash_merge_commit_title === "PR_TITLE"
        ? "✅ Default squash commit subject will use the Pull Request title."
        : "⚠️ Default squash commit subject is based on either your Commit message or Pull Request title."
    );
  } else {
    core.info("ℹ️ Squash commit strategy is disabled.");
  }

  core.info(
    repository.allow_rebase_merge === true
      ? "ℹ️ Rebase merges are enabled, validating both Pull Request title and all associated commits."
      : "ℹ️ Rebase merges are disabled, only validating the Pull Request title."
  );
}