require 'net/http'
require 'json'

module GemHadar::GitHub
end

# A client for creating GitHub releases via the GitHub API.
#
# This class provides functionality to interact with the GitHub Releases API,
# enabling the creation of new releases for a specified repository. It handles
# the HTTP request setup, including appropriate headers and authentication,
# and processes the API response to either return the created release data or
# raise an error if the creation fails.
#
# @example Creating a release
#   creator = GemHadar::GitHub::ReleaseCreator.new(
#     owner: 'myorg',
#     repo: 'myrepo',
#     token: 'ghp_mytoken'
#   )
#   release_data = creator.perform(
#     tag_name: 'v1.0.0',
#     target_commitish: 'main',
#     body: 'Release notes here',
#     name: 'Version 1.0.0'
#   )
class GemHadar::GitHub::ReleaseCreator
  class << self
    attr_accessor :github_api_url
  end
  self.github_api_url = 'https://api.github.com'

  def initialize(owner:, repo:, token:, api_version: '2022-11-28')
    @owner       = owner
    @repo        = repo
    @token       = token
    @api_version = api_version
  end

  def perform(tag_name:, target_commitish:, body:, name: tag_name, draft: false, prerelease: false)
    uri = URI("#{self.class.github_api_url}/repos/#@owner/#@repo/releases")

    headers = {
      "Accept"               => "application/vnd.github+json",
      "Authorization"        => "Bearer #@token",
      "Content-Type"         => "application/json",
      "X-GitHub-Api-Version" => @api_version,
      "User-Agent"           => [ GemHadar.name, GemHadar::VERSION ] * ?/,
    }

    data = {
      tag_name:,
      target_commitish:,
      body:,
      name:,
      draft:,
      prerelease:,
    }.compact

    response = Net::HTTP.post(uri, JSON(data), headers)
    case response
    when Net::HTTPSuccess
      JSON.parse(response.body, object_class: JSON::GenericObject)
    else
      error_data =
        begin
          JSON.pretty_generate(JSON.parse(response.body))
        rescue
          response.body
        end
      raise "Failed to create release. Status: #{response.code}\n\n#{error_data}"
    end
  end
end