module Coveralls::Configuration

def self.configuration
  config = {
    :environment => self.relevant_env,
    :git => git
  }
  yml = self.yaml_config
  if yml
    config[:configuration] = yml
    config[:repo_token] = yml['repo_token'] || yml['repo_secret_token']
  end
  if ENV['COVERALLS_REPO_TOKEN']
    config[:repo_token] = ENV['COVERALLS_REPO_TOKEN']
  end
  if ENV['COVERALLS_PARALLEL'] && ENV['COVERALLS_PARALLEL'] != "false"
    config[:parallel] = true
  end
  if ENV['COVERALLS_FLAG_NAME']
    config[:flag_name] = ENV['COVERALLS_FLAG_NAME']
  end
  if ENV['TRAVIS']
    set_service_params_for_travis(config, yml ? yml['service_name'] : nil)
  elsif ENV['CIRCLECI']
    set_service_params_for_circleci(config)
  elsif ENV['SEMAPHORE']
    set_service_params_for_semaphore(config)
  elsif ENV['JENKINS_URL'] || ENV['JENKINS_HOME']
    set_service_params_for_jenkins(config)
  elsif ENV['APPVEYOR']
    set_service_params_for_appveyor(config)
  elsif ENV['TDDIUM']
    set_service_params_for_tddium(config)
  elsif ENV['GITLAB_CI']
    set_service_params_for_gitlab(config)
  elsif ENV['COVERALLS_RUN_LOCALLY'] || Coveralls.testing
    set_service_params_for_coveralls_local(config)
  end
  # standardized env vars
  set_standard_service_params_for_generic_ci(config)
  if service_name = ENV['COVERALLS_SERVICE_NAME']
    config[:service_name] = service_name
  end
  config
end

def self.configuration_path
  File.expand_path(File.join(self.root, ".coveralls.yml")) if self.root
end

def self.git
  hash = {}
  Dir.chdir(root) do
    hash[:head] = {
      :id => ENV.fetch("GIT_ID", `git log -1 --pretty=format:'%H'`),
      :author_name => ENV.fetch("GIT_AUTHOR_NAME", `git log -1 --pretty=format:'%aN'`),
      :author_email => ENV.fetch("GIT_AUTHOR_EMAIL", `git log -1 --pretty=format:'%ae'`),
      :committer_name => ENV.fetch("GIT_COMMITTER_NAME", `git log -1 --pretty=format:'%cN'`),
      :committer_email => ENV.fetch("GIT_COMMITTER_EMAIL", `git log -1 --pretty=format:'%ce'`),
      :message => ENV.fetch("GIT_MESSAGE", `git log -1 --pretty=format:'%s'`)
    }
    # Branch
    hash[:branch] = ENV.fetch("GIT_BRANCH", `git rev-parse --abbrev-ref HEAD`)
    # Remotes
    remotes = nil
    begin
      remotes = `git remote -v`.split(/\n/).map do |remote|
        splits = remote.split(" ").compact
        {:name => splits[0], :url => splits[1]}
      end.uniq
    rescue
    end
    hash[:remotes] = remotes
  end
  hash
rescue Exception => e
  Coveralls::Output.puts "Coveralls git error:", :color => "red"
  Coveralls::Output.puts e.to_s, :color => "red"
  nil
end

def self.pwd
  Dir.pwd
end

def self.rails_root
  Rails.root.to_s
rescue
  nil
end

def self.relevant_env
  hash = {
    :pwd => self.pwd,
    :rails_root => self.rails_root,
    :simplecov_root => simplecov_root,
    :gem_version => VERSION
  }
  hash.merge! begin
    if ENV['TRAVIS']
      {
        :travis_job_id => ENV['TRAVIS_JOB_ID'],
        :travis_pull_request => ENV['TRAVIS_PULL_REQUEST'],
        :branch => ENV['TRAVIS_BRANCH']
      }
    elsif ENV['CIRCLECI']
      {
        :circleci_build_num => ENV['CIRCLE_BUILD_NUM'],
        :branch => ENV['CIRCLE_BRANCH'],
        :commit_sha => ENV['CIRCLE_SHA1']
      }
    elsif ENV['JENKINS_URL']
      {
        :jenkins_build_num => ENV['BUILD_NUMBER'],
        :jenkins_build_url => ENV['BUILD_URL'],
        :branch => ENV['GIT_BRANCH'],
        :commit_sha => ENV['GIT_COMMIT']
      }
    elsif ENV['SEMAPHORE']
      {
        :branch => ENV['BRANCH_NAME'],
        :commit_sha => ENV['REVISION']
      }
    else
      {}
    end
  end
  hash
end

def self.root
  pwd
end

def self.set_service_params_for_appveyor(config)
  config[:service_name]   = 'appveyor'
  config[:service_number] = ENV['APPVEYOR_BUILD_VERSION']
  config[:service_branch] = ENV['APPVEYOR_REPO_BRANCH']
  config[:commit_sha] = ENV['APPVEYOR_REPO_COMMIT']
  repo_name = ENV['APPVEYOR_REPO_NAME']
  config[:service_build_url]  = 'https://ci.appveyor.com/project/%s/build/%s' % [repo_name, config[:service_number]]
end

def self.set_service_params_for_circleci(config)
  config[:service_name]         = 'circleci'
  config[:service_number]       = ENV['CIRCLE_BUILD_NUM']
  config[:service_pull_request] = (ENV['CI_PULL_REQUEST'] || "")[/(\d+)$/,1]
  config[:parallel]             = ENV['CIRCLE_NODE_TOTAL'].to_i > 1
  config[:service_job_number]   = ENV['CIRCLE_NODE_INDEX']
end

def self.set_service_params_for_coveralls_local(config)
  config[:service_job_id]     = nil
  config[:service_name]       = 'coveralls-ruby'
  config[:service_event_type] = 'manual'
end

def self.set_service_params_for_gitlab(config)
  config[:service_name]         = 'gitlab-ci'
  config[:service_job_number]   = ENV['CI_BUILD_NAME']
  config[:service_job_id]       = ENV['CI_BUILD_ID']
  config[:service_branch]       = ENV['CI_BUILD_REF_NAME']
  config[:commit_sha]           = ENV['CI_BUILD_REF']
end

def self.set_service_params_for_jenkins(config)
  config[:service_name]   = 'jenkins'
  config[:service_number] = ENV['BUILD_NUMBER']
  config[:service_branch] = ENV['BRANCH_NAME']
  config[:service_pull_request] = ENV['ghprbPullId']
end

def self.set_service_params_for_semaphore(config)
  config[:service_name]         = 'semaphore'
  config[:service_number]       = ENV['SEMAPHORE_BUILD_NUMBER']
  config[:service_pull_request] = ENV['PULL_REQUEST_NUMBER']
end

def self.set_service_params_for_tddium(config)
  config[:service_name]         = 'tddium'
  config[:service_number]       = ENV['TDDIUM_SESSION_ID']
  config[:service_job_number]   = ENV['TDDIUM_TID']
  config[:service_pull_request] = ENV['TDDIUM_PR_ID']
  config[:service_branch]       = ENV['TDDIUM_CURRENT_BRANCH']
  config[:service_build_url]    = "https://ci.solanolabs.com/reports/#{ENV['TDDIUM_SESSION_ID']}"
end

def self.set_service_params_for_travis(config, service_name)
  config[:service_job_id] = ENV['TRAVIS_JOB_ID']
  config[:service_pull_request] = ENV['TRAVIS_PULL_REQUEST'] unless ENV['TRAVIS_PULL_REQUEST'] == 'false'
  config[:service_name]   = service_name || 'travis-ci'
  config[:service_branch] = ENV['TRAVIS_BRANCH']
end

def self.set_standard_service_params_for_generic_ci(config)
  config[:service_name]         ||= ENV['CI_NAME']
  config[:service_number]       ||= ENV['CI_BUILD_NUMBER']
  config[:service_job_id]       ||= ENV['CI_JOB_ID']
  config[:service_build_url]    ||= ENV['CI_BUILD_URL']
  config[:service_branch]       ||= ENV['CI_BRANCH']
  config[:service_pull_request] ||= (ENV['CI_PULL_REQUEST'] || "")[/(\d+)$/,1]
end

def self.simplecov_root
  if defined?(::SimpleCov)
    ::SimpleCov.root
  end
end

def self.yaml_config
  if self.configuration_path && File.exist?(self.configuration_path)
    YAML::load_file(self.configuration_path)
  end
end