# == Schema Information
#
# Table name: projects
#
#  id                     :integer          not null, primary key
#  name                   :string(255)
#  path                   :string(255)
#  description            :text
#  created_at             :datetime         not null
#  updated_at             :datetime         not null
#  private_flag           :boolean          default(TRUE), not null
#  creator_id             :integer
#  default_branch         :string(255)
#  issues_enabled         :boolean          default(TRUE), not null
#  wall_enabled           :boolean          default(TRUE), not null
#  merge_requests_enabled :boolean          default(TRUE), not null
#  wiki_enabled           :boolean          default(TRUE), not null
#  namespace_id           :integer
#

require "grit"

class Project < ActiveRecord::Base
  include Gitolited

  class TransferError < StandardError; end

  attr_accessible :name, :path, :description, :default_branch, :issues_enabled,
                  :wall_enabled, :merge_requests_enabled, :wiki_enabled, :public, as: [:default, :admin]

  attr_accessible :namespace_id, :creator_id, as: :admin

  attr_accessor :error_code

  # Relations
  belongs_to :group, foreign_key: "namespace_id", conditions: "type = 'Group'"
  belongs_to :namespace

  belongs_to :creator,
    class_name: "User",
    foreign_key: "creator_id"

  has_many :users,          through: :users_projects
  has_many :events,         dependent: :destroy
  has_many :merge_requests, dependent: :destroy
  has_many :issues,         dependent: :destroy, order: "closed, created_at DESC"
  has_many :milestones,     dependent: :destroy
  has_many :users_projects, dependent: :destroy
  has_many :notes,          dependent: :destroy
  has_many :snippets,       dependent: :destroy
  has_many :deploy_keys,    dependent: :destroy, foreign_key: "project_id", class_name: "Key"
  has_many :hooks,          dependent: :destroy, class_name: "ProjectHook"
  has_many :wikis,          dependent: :destroy
  has_many :protected_branches, dependent: :destroy
  has_one :last_event, class_name: 'Event', order: 'events.created_at DESC', foreign_key: 'project_id'
  has_one :gitlab_ci_service, dependent: :destroy

  delegate :name, to: :owner, allow_nil: true, prefix: true

  # Validations
  validates :creator, presence: true
  validates :description, length: { within: 0..2000 }
  validates :name, presence: true, length: { within: 0..255 },
            format: { with: Gitlab::Regex.project_name_regex,
                      message: "only letters, digits, spaces & '_' '-' '.' allowed. Letter should be first" }
  validates :path, presence: true, length: { within: 0..255 },
            format: { with: Gitlab::Regex.path_regex,
                      message: "only letters, digits & '_' '-' '.' allowed. Letter should be first" }
  validates :issues_enabled, :wall_enabled, :merge_requests_enabled,
            :wiki_enabled, inclusion: { in: [true, false] }

  validates_uniqueness_of :name, scope: :namespace_id
  validates_uniqueness_of :path, scope: :namespace_id

  validate :check_limit, :repo_name

  # Scopes
  scope :without_user, ->(user)  { where("id NOT IN (:ids)", ids: user.authorized_projects.map(&:id) ) }
  scope :not_in_group, ->(group) { where("id NOT IN (:ids)", ids: group.project_ids ) }
  scope :in_namespace, ->(namespace) { where(namespace_id: namespace.id) }
  scope :sorted_by_activity, ->() { order("(SELECT max(events.created_at) FROM events WHERE events.project_id = projects.id) DESC") }
  scope :personal, ->(user) { where(namespace_id: user.namespace_id) }
  scope :joined, ->(user) { where("namespace_id != ?", user.namespace_id) }
  scope :public, where(public: true)

  class << self
    def abandoned
      project_ids = Event.select('max(created_at) as latest_date, project_id').
        group('project_id').
        having('latest_date < ?', 6.months.ago).map(&:project_id)

      where(id: project_ids)
    end

    def with_push
      includes(:events).where('events.action = ?', Event::Pushed)
    end

    def active
      joins(:issues, :notes, :merge_requests).order("issues.created_at, notes.created_at, merge_requests.created_at DESC")
    end

    def search query
      where("projects.name LIKE :query OR projects.path LIKE :query", query: "%#{query}%")
    end

    def find_with_namespace(id)
      if id.include?("/")
        id = id.split("/")
        namespace = Namespace.find_by_path(id.first)
        return nil unless namespace

        where(namespace_id: namespace.id).find_by_path(id.second)
      else
        where(path: id, namespace_id: nil).last
      end
    end

    def access_options
      UsersProject.access_roles
    end
  end

  def team
    @team ||= Team.new(self)
  end

  def repository
    if path
      @repository ||= Repository.new(path_with_namespace, default_branch)
    else
      nil
    end
  rescue Grit::NoSuchPathError
    nil
  end

  def git_error?
    error_code == :gitolite
  end

  def saved?
    id && valid?
  end

  def check_limit
    unless creator.can_create_project?
      errors[:base] << ("Your own projects limit is #{creator.projects_limit}! Please contact administrator to increase it")
    end
  rescue
    errors[:base] << ("Can't check your ability to create project")
  end

  def repo_name
    denied_paths = %w(gitolite-admin admin dashboard groups help profile projects search)

    if denied_paths.include?(path)
      errors.add(:path, "like #{path} is not allowed")
    end
  end

  def to_param
    if namespace
      namespace.path + "/" + path
    else
      path
    end
  end

  def web_url
    [Gitlab.config.gitlab.url, path_with_namespace].join("/")
  end

  def build_commit_note(commit)
    notes.new(commit_id: commit.id, noteable_type: "Commit")
  end

  def last_activity
    last_event
  end

  def last_activity_date
    last_event.try(:created_at) || updated_at
  end

  def project_id
    self.id
  end

  def issues_labels
    issues.tag_counts_on(:labels)
  end

  def services
    [gitlab_ci_service].compact
  end

  def gitlab_ci?
    gitlab_ci_service && gitlab_ci_service.active
  end

  # For compatibility with old code
  def code
    path
  end

  def items_for entity
    case entity
    when 'issue' then
      issues
    when 'merge_request' then
      merge_requests
    end
  end

  def send_move_instructions
    self.users_projects.each do |member|
      Notify.delay.project_was_moved_email(member.id)
    end
  end

  def owner
    if namespace
      namespace_owner
    else
      creator
    end
  end

  def team_member_by_name_or_email(name = nil, email = nil)
    user = users.where("name like ? or email like ?", name, email).first
    users_projects.where(user: user) if user
  end

  # Get Team Member record by user id
  def team_member_by_id(user_id)
    users_projects.find_by_user_id(user_id)
  end

  def transfer(new_namespace)
    Project.transaction do
      old_namespace = namespace
      self.namespace = new_namespace

      old_dir = old_namespace.try(:path) || ''
      new_dir = new_namespace.try(:path) || ''

      old_repo = if old_dir.present?
                   File.join(old_dir, self.path)
                 else
                   self.path
                 end

      if Project.where(path: self.path, namespace_id: new_namespace.try(:id)).present?
        raise TransferError.new("Project with same path in target namespace already exists")
      end

      Gitlab::ProjectMover.new(self, old_dir, new_dir).execute

      gitolite.move_repository(old_repo, self)

      save!
    end
  rescue Gitlab::ProjectMover::ProjectMoveError => ex
    raise Project::TransferError.new(ex.message)
  end

  def name_with_namespace
    @name_with_namespace ||= begin
                               if namespace
                                 namespace.human_name + " / " + name
                               else
                                 name
                               end
                             end
  end

  def namespace_owner
    namespace.try(:owner)
  end

  def path_with_namespace
    if namespace
      namespace.path + '/' + path
    else
      path
    end
  end

  # This method will be called after each post receive and only if the provided
  # user is present in GitLab.
  #
  # All callbacks for post receive should be placed here.
  def trigger_post_receive(oldrev, newrev, ref, user)
    data = post_receive_data(oldrev, newrev, ref, user)

    # Create push event
    self.observe_push(data)

    if push_to_branch? ref, oldrev
      # Close merged MR
      self.update_merge_requests(oldrev, newrev, ref, user)

      # Execute web hooks
      self.execute_hooks(data.dup)

      # Execute project services
      self.execute_services(data.dup)
    end

    # Create satellite
    self.satellite.create unless self.satellite.exists?

    # Discover the default branch, but only if it hasn't already been set to
    # something else
    if repository && default_branch.nil?
      update_attributes(default_branch: self.repository.discover_default_branch)
    end
  end

  def push_to_branch? ref, oldrev
    ref_parts = ref.split('/')

    # Return if this is not a push to a branch (e.g. new commits)
    !(ref_parts[1] !~ /heads/ || oldrev == "00000000000000000000000000000000")
  end

  def observe_push(data)
    Event.create(
      project: self,
      action: Event::Pushed,
      data: data,
      author_id: data[:user_id]
    )
  end

  def execute_hooks(data)
    hooks.each { |hook| hook.execute(data) }
  end

  def execute_services(data)
    services.each do |service|

      # Call service hook only if it is active
      service.execute(data) if service.active
    end
  end

  # Produce a hash of post-receive data
  #
  # data = {
  #   before: String,
  #   after: String,
  #   ref: String,
  #   user_id: String,
  #   user_name: String,
  #   repository: {
  #     name: String,
  #     url: String,
  #     description: String,
  #     homepage: String,
  #   },
  #   commits: Array,
  #   total_commits_count: Fixnum
  # }
  #
  def post_receive_data(oldrev, newrev, ref, user)

    push_commits = repository.commits_between(oldrev, newrev)

    # Total commits count
    push_commits_count = push_commits.size

    # Get latest 20 commits ASC
    push_commits_limited = push_commits.last(20)

    # Hash to be passed as post_receive_data
    data = {
      before: oldrev,
      after: newrev,
      ref: ref,
      user_id: user.id,
      user_name: user.name,
      repository: {
        name: name,
        url: url_to_repo,
        description: description,
        homepage: web_url,
      },
      commits: [],
      total_commits_count: push_commits_count
    }

    # For perfomance purposes maximum 20 latest commits
    # will be passed as post receive hook data.
    #
    push_commits_limited.each do |commit|
      data[:commits] << {
        id: commit.id,
        message: commit.safe_message,
        timestamp: commit.date.xmlschema,
        url: "#{Gitlab.config.gitlab.url}/#{path_with_namespace}/commit/#{commit.id}",
        author: {
          name: commit.author_name,
          email: commit.author_email
        }
      }
    end

    data
  end

  def update_merge_requests(oldrev, newrev, ref, user)
    return true unless ref =~ /heads/
    branch_name = ref.gsub("refs/heads/", "")
    c_ids = self.repository.commits_between(oldrev, newrev).map(&:id)

    # Update code for merge requests
    mrs = self.merge_requests.opened.find_all_by_branch(branch_name).all
    mrs.each { |merge_request| merge_request.reload_code; merge_request.mark_as_unchecked }

    # Close merge requests
    mrs = self.merge_requests.opened.where(target_branch: branch_name).all
    mrs = mrs.select(&:last_commit).select { |mr| c_ids.include?(mr.last_commit.id) }
    mrs.each { |merge_request| merge_request.merge!(user.id) }

    true
  end

  def valid_repo?
    repo
  rescue
    errors.add(:path, "Invalid repository path")
    false
  end

  def empty_repo?
    !repository || repository.empty?
  end

  def satellite
    @satellite ||= Gitlab::Satellite::Satellite.new(self)
  end

  def repo
    repository.raw
  end

  def url_to_repo
    gitolite.url_to_repo(path_with_namespace)
  end

  def namespace_dir
    namespace.try(:path) || ''
  end

  def update_repository
    gitolite.update_repository(self)
  end

  def destroy_repository
    gitolite.remove_repository(self)
  end

  def repo_exists?
    @repo_exists ||= (repository && repository.branches.present?)
  rescue
    @repo_exists = false
  end

  def open_branches
    if protected_branches.empty?
      self.repo.heads
    else
      pnames = protected_branches.map(&:name)
      self.repo.heads.reject { |h| pnames.include?(h.name) }
    end.sort_by(&:name)
  end

  def root_ref?(branch)
    repository.root_ref == branch
  end

  def ssh_url_to_repo
    url_to_repo
  end

  def http_url_to_repo
    http_url = [Gitlab.config.gitlab.url, "/", path_with_namespace, ".git"].join('')
  end

  # Check if current branch name is marked as protected in the system
  def protected_branch? branch_name
    protected_branches.map(&:name).include?(branch_name)
  end
end