class Pronto::Github

def client
  @client ||= Octokit::Client.new(api_endpoint: @config.github_api_endpoint,
                                  web_endpoint: @config.github_web_endpoint,
                                  access_token: @config.github_access_token,
                                  auto_paginate: true)
end

def commit_comments(sha)
  @comment_cache[sha.to_s] ||= begin
    client.commit_comments(slug, sha).map do |comment|
      Comment.new(sha, comment.body, comment.path, comment.position)
    end
  end
end

def create_commit_comment(comment)
  @config.logger.log("Creating commit comment on #{comment.sha}")
  client.create_commit_comment(slug, comment.sha, comment.body,
                               comment.path, nil, comment.position)
end

def create_commit_status(status)
  sha = pull_sha || status.sha
  @config.logger.log("Creating comment status on #{sha}")
  client.create_status(slug, sha, status.state,
                       context: status.context,
                       description: status.description)
end

def create_pull_comment(comment)
  if comment.path && comment.position
    @config.logger.log("Creating pull request comment on #{pull_id}")
    client.create_pull_comment(slug, pull_id, comment.body,
                               pull_sha || comment.sha,
                               comment.path, comment.position)
  else
    create_commit_comment(comment)
  end
end

def create_pull_request_review(comments)
  options = {
    event: @config.github_review_type,
    accept: 'application/vnd.github.v3.diff+json', # https://developer.github.com/v3/pulls/reviews/#create-a-pull-request-review
    comments: comments.map do |comment|
      {
        path:     comment.path,
        position: comment.position,
        body:     comment.body
      }
    end
  }
  client.create_pull_request_review(slug, pull_id, options)
end

def initialize(repo)
  super(repo)
  @github_pull = Pronto::GithubPull.new(client, slug)
end

def publish_pull_request_comments(comments)
  comments_left = comments.clone
  while comments_left.any?
    comments_to_publish = comments_left.slice!(0, warnings_per_review)
    create_pull_request_review(comments_to_publish)
  end
end

def pull
  @pull ||= if env_pull_id
              @github_pull.pull_by_id(env_pull_id)
            elsif @repo.branch
              @github_pull.pull_by_branch(@repo.branch)
            elsif @repo.head_detached?
              @github_pull.pull_by_commit(@repo.head_commit_sha)
            end
end

def pull_comments(sha)
  @comment_cache["#{pull_id}/#{sha}"] ||= begin
    client.pull_comments(slug, pull_id).map do |comment|
      Comment.new(sha, comment.body, comment.path,
                  comment.position || comment.original_position)
    end
  end
rescue Octokit::NotFound => e
  @config.logger.log("Error raised and rescued: #{e}")
  msg = "Pull request for sha #{sha} with id #{pull_id} was not found."
  raise Pronto::Error, msg
end

def pull_id
  env_pull_id || pull[:number].to_i
end

def pull_sha
  pull[:head][:sha] if pull
end

def slug
  return @config.github_slug if @config.github_slug
  @slug ||= begin
    @repo.remote_urls.map do |url|
      hostname = Regexp.escape(@config.github_hostname)
      match = %r{.*#{hostname}(:|\/)(?<slug>.*?)(?:\.git)?\z}.match(url)
      match[:slug] if match
    end.compact.first
  end
end

def warnings_per_review
  @warnings_per_review ||= @config.warnings_per_review
end