# == Schema Information
#
# Table name: commits
#
#  id           :integer          not null, primary key
#  project_id   :integer
#  ref          :string(255)
#  sha          :string(255)
#  before_sha   :string(255)
#  push_data    :text
#  created_at   :datetime
#  updated_at   :datetime
#  tag          :boolean          default(FALSE)
#  yaml_errors  :text
#  committed_at :datetime
#

module Ci
  class Commit < ActiveRecord::Base
    extend Ci::Model

    belongs_to :gl_project, class_name: '::Project', foreign_key: :gl_project_id
    has_many :builds, dependent: :destroy, class_name: 'Ci::Build'
    has_many :trigger_requests, dependent: :destroy, class_name: 'Ci::TriggerRequest'

    serialize :push_data

    validates_presence_of :ref, :sha, :before_sha, :push_data
    validate :valid_commit_sha

    def self.truncate_sha(sha)
      sha[0...8]
    end

    def to_param
      sha
    end

    def project
      unless @project
        gl_project.ensure_ci_project
        @project = gl_project.gitlab_ci_project
      end
      @project
    end

    def project_id
      project.id
    end

    def last_build
      builds.order(:id).last
    end

    def retry
      builds_without_retry.each do |build|
        Ci::Build.retry(build)
      end
    end

    def valid_commit_sha
      if self.sha == Ci::Git::BLANK_SHA
        self.errors.add(:sha, " cant be 00000000 (branch removal)")
      end
    end

    def new_branch?
      before_sha == Ci::Git::BLANK_SHA
    end

    def compare?
      !new_branch?
    end

    def git_author_name
      commit_data[:author][:name] if commit_data && commit_data[:author]
    end

    def git_author_email
      commit_data[:author][:email] if commit_data && commit_data[:author]
    end

    def git_commit_message
      commit_data[:message] if commit_data && commit_data[:message]
    end

    def short_before_sha
      Ci::Commit.truncate_sha(before_sha)
    end

    def short_sha
      Ci::Commit.truncate_sha(sha)
    end

    def commit_data
      push_data[:commits].find do |commit|
        commit[:id] == sha
      end
    rescue
      nil
    end

    def project_recipients
      recipients = project.email_recipients.split(' ')

      if project.email_add_pusher? && push_data[:user_email].present?
        recipients << push_data[:user_email]
      end

      recipients.uniq
    end

    def stage
      return unless config_processor
      stages = builds_without_retry.select(&:active?).map(&:stage)
      config_processor.stages.find { |stage| stages.include? stage }
    end

    def create_builds_for_stage(stage, trigger_request)
      return if skip_ci? && trigger_request.blank?
      return unless config_processor

      builds_attrs = config_processor.builds_for_stage_and_ref(stage, ref, tag)
      builds_attrs.map do |build_attrs|
        builds.create!({
                         name: build_attrs[:name],
                         commands: build_attrs[:script],
                         tag_list: build_attrs[:tags],
                         options: build_attrs[:options],
                         allow_failure: build_attrs[:allow_failure],
                         stage: build_attrs[:stage],
                         trigger_request: trigger_request,
                       })
      end
    end

    def create_next_builds(trigger_request)
      return if skip_ci? && trigger_request.blank?
      return unless config_processor

      stages = builds.where(trigger_request: trigger_request).group_by(&:stage)

      config_processor.stages.any? do |stage|
        !stages.include?(stage) && create_builds_for_stage(stage, trigger_request).present?
      end
    end

    def create_builds(trigger_request = nil)
      return if skip_ci? && trigger_request.blank?
      return unless config_processor

      config_processor.stages.any? do |stage|
        create_builds_for_stage(stage, trigger_request).present?
      end
    end

    def builds_without_retry
      @builds_without_retry ||=
        begin
          grouped_builds = builds.group_by(&:name)
          grouped_builds.map do |name, builds|
            builds.sort_by(&:id).last
          end
        end
    end

    def builds_without_retry_sorted
      return builds_without_retry unless config_processor

      stages = config_processor.stages
      builds_without_retry.sort_by do |build|
        [stages.index(build.stage) || -1, build.name || ""]
      end
    end

    def retried_builds
      @retried_builds ||= (builds.order(id: :desc) - builds_without_retry)
    end

    def status
      if skip_ci?
        return 'skipped'
      elsif yaml_errors.present?
        return 'failed'
      elsif builds.none?
        return 'skipped'
      elsif success?
        'success'
      elsif pending?
        'pending'
      elsif running?
        'running'
      elsif canceled?
        'canceled'
      else
        'failed'
      end
    end

    def pending?
      builds_without_retry.all? do |build|
        build.pending?
      end
    end

    def running?
      builds_without_retry.any? do |build|
        build.running? || build.pending?
      end
    end

    def success?
      builds_without_retry.all? do |build|
        build.success? || build.ignored?
      end
    end

    def failed?
      status == 'failed'
    end

    def canceled?
      builds_without_retry.all? do |build|
        build.canceled?
      end
    end

    def duration
      @duration ||= builds_without_retry.select(&:duration).sum(&:duration).to_i
    end

    def finished_at
      @finished_at ||= builds.order('finished_at DESC').first.try(:finished_at)
    end

    def coverage
      if project.coverage_enabled?
        coverage_array = builds_without_retry.map(&:coverage).compact
        if coverage_array.size >= 1
          '%.2f' % (coverage_array.reduce(:+) / coverage_array.size)
        end
      end
    end

    def matrix?
      builds_without_retry.size > 1
    end

    def config_processor
      @config_processor ||= Ci::GitlabCiYamlProcessor.new(push_data[:ci_yaml_file])
    rescue Ci::GitlabCiYamlProcessor::ValidationError => e
      save_yaml_error(e.message)
      nil
    rescue Exception => e
      logger.error e.message + "\n" + e.backtrace.join("\n")
      save_yaml_error("Undefined yaml error")
      nil
    end

    def skip_ci?
      return false if builds.any?
      commits = push_data[:commits]
      commits.present? && commits.last[:message] =~ /(\[ci skip\])/
    end

    def update_committed!
      update!(committed_at: DateTime.now)
    end

    private

    def save_yaml_error(error)
      return if self.yaml_errors?
      self.yaml_errors = error
      save
    end
  end
end