class Badge < ActiveRecord::Base

  # badge ids
  Welcome = 5
  NicePost = 6
  GoodPost = 7
  GreatPost = 8
  Autobiographer = 9
  Editor = 10
  FirstLike = 11
  FirstShare = 12
  FirstFlag = 13
  FirstLink = 14
  FirstQuote = 15
  ReadFaq = 16

  # other consts
  AutobiographerMinBioLength = 10


  module Queries

    ReadFaq = <<SQL
    SELECT user_id, read_faq granted_at
    FROM user_stats
    WHERE read_faq IS NOT NULL
SQL

    FirstQuote = <<SQL
    SELECT l.user_id, l.post_id, l.created_at granted_at
    FROM
    (
      SELECT MIN(l1.id) id
      FROM topic_links l1
      JOIN badge_posts p1 ON p1.id = l1.post_id
      JOIN badge_posts p2 ON p2.id = l1.link_post_id
      WHERE NOT reflection AND quote
      GROUP BY l1.user_id
    ) ids
    JOIN topic_links l ON l.id = ids.id
SQL

    FirstLink = <<SQL
    SELECT l.user_id, l.post_id, l.created_at granted_at
    FROM
    (
      SELECT MIN(l1.id) id
      FROM topic_links l1
      JOIN badge_posts p1 ON p1.id = l1.post_id
      JOIN badge_posts p2 ON p2.id = l1.link_post_id
      WHERE NOT reflection AND p1.topic_id <> p2.topic_id AND not quote
      GROUP BY l1.user_id
    ) ids
    JOIN topic_links l ON l.id = ids.id
SQL

    FirstShare = <<SQL
    SELECT views.user_id, p2.id post_id, i2.created_at granted_at
    FROM
    (
      SELECT i.user_id, MIN(i.id) i_id
      FROM incoming_links i
      JOIN topics t on t.id = i.topic_id
      JOIN badge_posts p on p.topic_id = t.id AND p.post_number = i.post_number
      WHERE i.user_id IS NOT NULL
      GROUP BY i.user_id
    ) as views
    JOIN incoming_links i2 ON i2.id = views.i_id
    JOIN posts p2 on p2.topic_id = i2.topic_id AND p2.post_number = i2.post_number
SQL

    FirstFlag = <<SQL
    SELECT pa.user_id, min(pa.created_at) granted_at
    FROM post_actions pa
    JOIN badge_posts p on p.id = pa.post_id
    WHERE post_action_type_id IN (#{PostActionType.flag_types.values.join(",")})
    GROUP BY pa.user_id
SQL

    FirstLike = <<SQL
    SELECT pa.user_id, min(post_id) post_id, min(pa.created_at) granted_at
    FROM post_actions pa
    JOIN badge_posts p on p.id = pa.post_id
    WHERE post_action_type_id = 2
    GROUP BY pa.user_id
SQL

    Editor = <<SQL
    SELECT p.user_id, min(p.id) post_id, min(p.created_at) granted_at
    FROM badge_posts p
    WHERE p.self_edits > 0
    GROUP BY p.user_id
SQL

    Welcome = <<SQL
    SELECT p.user_id, min(post_id) post_id, min(pa.created_at) granted_at
    FROM post_actions pa
    JOIN badge_posts p on p.id = pa.post_id
    WHERE post_action_type_id = 2
    GROUP BY p.user_id
SQL

    Autobiographer = <<SQL
    SELECT u.id user_id, current_timestamp granted_at
    FROM users u
    JOIN user_profiles up on u.id = up.user_id
    WHERE bio_raw IS NOT NULL AND LENGTH(TRIM(bio_raw)) > #{Badge::AutobiographerMinBioLength} AND
          uploaded_avatar_id IS NOT NULL
SQL

    def self.like_badge(count)
      # we can do better with dates, but its hard work
"
    SELECT p.user_id, p.id post_id, p.updated_at granted_at
    FROM badge_posts p
    WHERE p.like_count >= #{count.to_i}
"
    end

    def self.trust_level(level)
      # we can do better with dates, but its hard work figuring this out historically
"
    SELECT u.id user_id, current_timestamp granted_at FROM users u
    WHERE trust_level >= #{level.to_i}
"
    end
  end

  belongs_to :badge_type
  has_many :user_badges, dependent: :destroy

  validates :name, presence: true, uniqueness: true
  validates :badge_type, presence: true
  validates :allow_title, inclusion: [true, false]
  validates :multiple_grant, inclusion: [true, false]

  scope :enabled, ->{ where(enabled: true) }


  def self.trust_level_badge_ids
    (1..4).to_a
  end

  def self.like_badge_counts
    @like_badge_counts ||= {
      NicePost => 10,
      GoodPost => 25,
      GreatPost => 50
    }
  end

  def reset_grant_count!
    self.grant_count = UserBadge.where(badge_id: id).count
    save!
  end

  def single_grant?
    !self.multiple_grant?
  end

end

# == Schema Information
#
# Table name: badges
#
#  id             :integer          not null, primary key
#  name           :string(255)      not null
#  description    :text
#  badge_type_id  :integer          not null
#  grant_count    :integer          default(0), not null
#  created_at     :datetime
#  updated_at     :datetime
#  allow_title    :boolean          default(FALSE), not null
#  multiple_grant :boolean          default(FALSE), not null
#  icon           :string(255)      default("fa-certificate")
#  listable       :boolean          default(TRUE)
#  target_posts   :boolean          default(FALSE)
#  query          :text
#
# Indexes
#
#  index_badges_on_name  (name) UNIQUE
#