# frozen_string_literal: true

class Github
  def initialize
    options = { client_id: CONFIG['github']['key'], client_secret: CONFIG['github']['secret'] }
    if CONFIG['github']['auto_paginate']
      options.merge! auto_paginate: true
    else
      options.merge! per_page: 100
    end
    @client = Octokit::Client.new(options)
  end

  attr_reader :client

  def commits(project)
    commits = if project.branch.blank?
                client.commits project.full_name
              else
                client.commits project.full_name, sha: project.branch
              end

    last_response = client.last_response
    pages = (CONFIG['github']['project_pages'][project.full_name] || CONFIG['github']['pages'] || 1).to_i
    (pages - 1).times do
      if last_response.rels[:next]
        last_response = last_response.rels[:next].get
        commits += last_response.data
      end
    end

    commits
  end

  def repository_info(project)
    case project
    when String
      client.repo project
    when Project
      if project.github_id.present?
        client.get "/repositories/#{project.github_id}"
      else
        client.repo project.full_name
      end
    else
      raise 'Unknown parameter class'
    end
  end

  def find_or_create_project(project_name)
    find_project(project_name) || create_project(project_name)
  end

  def find_project(project_name)
    Project.find_by(host: 'github', full_name: project_name)
  end

  def create_project(project_name)
    project_name =~ %r{\w+/\w+}
    return unless project_name

    repo = repository_info(project_name)
    project = Project.find_or_create_by(host: 'github', full_name: repo.full_name)
    project.update_repository_info(repo)
    project
  rescue Octokit::NotFound
    nil
  end

  def collaborators_info(project)
    begin
      client.get("/repos/#{project.full_name}/collaborators").map(&:login)
    rescue StandardError
      [project.full_name.split('/').first]
    end +
      begin
        client.get("/orgs/#{project.full_name.split('/').first}/members").map(&:login)
      rescue StandardError
        []
      end
  end

  def branches(project)
    branches = client.get("/repos/#{project.full_name}/branches")
    last_response = client.last_response
    while last_response && last_response.rels[:next]
      last_response = last_response.rels[:next].get
      branches += last_response.data
    end
    branches.map(&:name)
  end

  def repository_url(project)
    "https://github.com/#{project.full_name}"
  end

  def source_repository_url(project)
    "https://github.com/#{project.source_full_name}"
  end

  def commit_url(project, commit)
    "https://github.com/#{project.full_name}/commit/#{commit}"
  end
end