require_dependency 'topic_subtype'

class Report
  attr_accessor :type, :data, :total, :prev30Days, :start_date,
                :end_date, :category_id, :group_id, :labels, :async,
                :prev_period, :facets, :limit, :processing, :average, :percent,
                :higher_is_better, :icon, :modes, :category_filtering,
                :group_filtering, :prev_data, :prev_start_date, :prev_end_date,
                :dates_filtering, :timeout

  def self.default_days
    30
  end

  def initialize(type)
    @type = type
    @start_date ||= Report.default_days.days.ago.beginning_of_day
    @end_date ||= Time.zone.now.end_of_day
    @prev_end_date = @start_date
    @average = false
    @percent = false
    @higher_is_better = true
    @category_filtering = false
    @group_filtering = false
    @modes = [:table, :chart]
    @prev_data = nil
    @dates_filtering = true
  end

  def self.cache_key(report)
    (+"reports:") <<
    [
      report.type,
      report.category_id,
      report.start_date.to_date.strftime("%Y%m%d"),
      report.end_date.to_date.strftime("%Y%m%d"),
      report.group_id,
      report.facets,
      report.limit
    ].map(&:to_s).join(':')
  end

  def self.clear_cache
    Discourse.cache.keys("reports:*").each do |key|
      Discourse.cache.redis.del(key)
    end
  end

  def self.wrap_slow_query(timeout = 20000)
    begin
      ActiveRecord::Base.connection.transaction do
        # Set a statement timeout so we can't tie up the server
        DB.exec "SET LOCAL statement_timeout = #{timeout}"
        yield
      end
    rescue ActiveRecord::QueryCanceled
      return :timeout
    end

    nil
  end

  def prev_start_date
    self.start_date - (self.end_date - self.start_date)
  end

  def prev_end_date
    self.start_date
  end

  def as_json(options = nil)
    description = I18n.t("reports.#{type}.description", default: "")

    {
     type: type,
     title: I18n.t("reports.#{type}.title"),
     xaxis: I18n.t("reports.#{type}.xaxis"),
     yaxis: I18n.t("reports.#{type}.yaxis"),
     description: description.presence ? description : nil,
     data: data,
     start_date: start_date&.iso8601,
     end_date: end_date&.iso8601,
     prev_data: self.prev_data,
     prev_start_date: prev_start_date&.iso8601,
     prev_end_date: prev_end_date&.iso8601,
     category_id: category_id,
     group_id: group_id,
     prev30Days: self.prev30Days,
     dates_filtering: self.dates_filtering,
     report_key: Report.cache_key(self),
     labels: labels || [
       { type: :date, properties: [:x], title: I18n.t("reports.default.labels.day") },
       { type: :number, properties: [:y], title: I18n.t("reports.default.labels.count") },
     ],
     processing: self.processing,
     average: self.average,
     percent: self.percent,
     higher_is_better: self.higher_is_better,
     category_filtering: self.category_filtering,
     group_filtering: self.group_filtering,
     modes: self.modes
    }.tap do |json|
      json[:timeout] = self.timeout if self.timeout
      json[:total] = self.total if self.total
      json[:prev_period] = self.prev_period if self.prev_period
      json[:prev30Days] = self.prev30Days if self.prev30Days
      json[:limit] = self.limit if self.limit

      if type == 'page_view_crawler_reqs'
        json[:related_report] = Report.find('web_crawlers', start_date: start_date, end_date: end_date)&.as_json
      end
    end
  end

  def Report.add_report(name, &block)
    singleton_class.instance_eval { define_method("report_#{name}", &block) }
  end

  def self._get(type, opts = nil)
    opts ||= {}

    # Load the report
    report = Report.new(type)
    report.start_date = opts[:start_date] if opts[:start_date]
    report.end_date = opts[:end_date] if opts[:end_date]
    report.category_id = opts[:category_id] if opts[:category_id]
    report.group_id = opts[:group_id] if opts[:group_id]
    report.facets = opts[:facets] || [:total, :prev30Days]
    report.limit = opts[:limit] if opts[:limit]
    report.processing = false
    report.average = opts[:average] if opts[:average]
    report.percent = opts[:percent] if opts[:percent]
    report.higher_is_better = opts[:higher_is_better] if opts[:higher_is_better]

    report
  end

  def self.find_cached(type, opts = nil)
    report = _get(type, opts)
    Discourse.cache.read(cache_key(report))
  end

  def self.cache(report, duration)
    Discourse.cache.write(Report.cache_key(report), report.as_json, force: true, expires_in: duration)
  end

  def self.find(type, opts = nil)
    clear_cache

    report = _get(type, opts)
    report_method = :"report_#{type}"

    if respond_to?(report_method)
      send(report_method, report)
    elsif type =~ /_reqs$/
      req_report(report, type.split(/_reqs$/)[0].to_sym)
    else
      return nil
    end

    report
  end

  def self.req_report(report, filter = nil)
    data =
      if filter == :page_view_total
        ApplicationRequest.where(req_type: [
          ApplicationRequest.req_types.reject { |k, v| k =~ /mobile/ }.map { |k, v| v if k =~ /page_view/ }.compact
        ].flatten)
      else
        ApplicationRequest.where(req_type:  ApplicationRequest.req_types[filter])
      end

    if filter == :page_view_total
      report.icon = 'file'
    end

    report.data = []
    data.where('date >= ? AND date <= ?', report.start_date, report.end_date)
      .order(date: :asc)
      .group(:date)
      .sum(:count)
      .each do |date, count|
      report.data << { x: date, y: count }
    end

    report.total = data.sum(:count)

    report.prev30Days = data.where(
        'date >= ? AND date < ?',
        (report.start_date - 31.days), report.start_date
      ).sum(:count)
  end

  def self.report_visits(report)
    report.group_filtering = true
    report.icon = 'user'

    basic_report_about report, UserVisit, :by_day, report.start_date, report.end_date, report.group_id

    add_counts report, UserVisit, 'visited_at'
  end

  def self.report_mobile_visits(report)
    basic_report_about report, UserVisit, :mobile_by_day, report.start_date, report.end_date
    report.total      = UserVisit.where(mobile: true).count
    report.prev30Days = UserVisit.where(mobile: true).where("visited_at >= ? and visited_at < ?", report.start_date - 30.days, report.start_date).count
  end

  def self.report_signups(report)
    report.group_filtering = true

    if report.group_id
      basic_report_about report, User.real, :count_by_signup_date, report.start_date, report.end_date, report.group_id
      add_counts report, User.real, 'users.created_at'
    else
      report_about report, User.real, :count_by_signup_date
    end

    add_prev_data report, User.real, :count_by_signup_date, report.prev_start_date, report.prev_end_date
  end

  def self.report_new_contributors(report)
    report.data = []

    data = User.real.count_by_first_post(report.start_date, report.end_date)

    if report.facets.include?(:prev30Days)
      prev30DaysData = User.real.count_by_first_post(report.start_date - 30.days, report.start_date)
      report.prev30Days = prev30DaysData.sum { |k, v| v }
    end

    if report.facets.include?(:total)
      report.total = User.real.count_by_first_post
    end

    if report.facets.include?(:prev_period)
      prev_period_data = User.real.count_by_first_post(report.prev_start_date, report.prev_end_date)
      report.prev_period = prev_period_data.sum { |k, v| v }
      report.prev_data = prev_period_data.map { |k, v| { x: k, y: v } }
    end

    data.each do |key, value|
      report.data << { x: key, y: value }
    end
  end

  def self.report_daily_engaged_users(report)
    report.average = true

    report.data = []

    data = UserAction.count_daily_engaged_users(report.start_date, report.end_date)

    if report.facets.include?(:prev30Days)
      prev30DaysData = UserAction.count_daily_engaged_users(report.start_date - 30.days, report.start_date)
      report.prev30Days = prev30DaysData.sum { |k, v| v }
    end

    if report.facets.include?(:total)
      report.total = UserAction.count_daily_engaged_users
    end

    if report.facets.include?(:prev_period)
      prev_data = UserAction.count_daily_engaged_users(report.prev_start_date, report.prev_end_date)

      prev = prev_data.sum { |k, v| v }
      if prev > 0
        prev = prev / ((report.end_date - report.start_date) / 1.day)
      end
      report.prev_period = prev
    end

    data.each do |key, value|
      report.data << { x: key, y: value }
    end
  end

  def self.report_dau_by_mau(report)
    report.average = true
    report.percent = true

    data_points = UserVisit.count_by_active_users(report.start_date, report.end_date)

    report.data = []

    compute_dau_by_mau = Proc.new { |data_point|
      if data_point["mau"] == 0
        0
      else
        ((data_point["dau"].to_f / data_point["mau"].to_f) * 100).ceil(2)
      end
    }

    dau_avg = Proc.new { |start_date, end_date|
      data_points = UserVisit.count_by_active_users(start_date, end_date)
      if !data_points.empty?
        sum = data_points.sum { |data_point| compute_dau_by_mau.call(data_point) }
        (sum.to_f / data_points.count.to_f).ceil(2)
      end
    }

    data_points.each do |data_point|
      report.data << { x: data_point["date"], y: compute_dau_by_mau.call(data_point) }
    end

    if report.facets.include?(:prev_period)
      report.prev_period = dau_avg.call(report.prev_start_date, report.prev_end_date)
    end

    if report.facets.include?(:prev30Days)
      report.prev30Days = dau_avg.call(report.start_date - 30.days, report.start_date)
    end
  end

  def self.report_profile_views(report)
    report.group_filtering = true
    start_date = report.start_date
    end_date = report.end_date
    basic_report_about report, UserProfileView, :profile_views_by_day, start_date, end_date, report.group_id

    report.total = UserProfile.sum(:views)
    report.prev30Days = UserProfileView.where("viewed_at >= ? AND viewed_at < ?", start_date - 30.days, start_date + 1).count
  end

  def self.report_topics(report)
    report.category_filtering = true
    basic_report_about report, Topic, :listable_count_per_day, report.start_date, report.end_date, report.category_id
    countable = Topic.listable_topics
    countable = countable.where(category_id: report.category_id) if report.category_id
    add_counts report, countable, 'topics.created_at'
  end

  def self.report_posts(report)
    report.modes = [:table, :chart]
    report.category_filtering = true
    basic_report_about report, Post, :public_posts_count_per_day, report.start_date, report.end_date, report.category_id
    countable = Post.public_posts.where(post_type: Post.types[:regular])
    countable = countable.joins(:topic).where("topics.category_id = ?", report.category_id) if report.category_id
    add_counts report, countable, 'posts.created_at'
  end

  def self.report_time_to_first_response(report)
    report.category_filtering = true
    report.icon = 'reply'
    report.higher_is_better = false
    report.data = []
    Topic.time_to_first_response_per_day(report.start_date, report.end_date, category_id: report.category_id).each do |r|
      report.data << { x: r["date"], y: r["hours"].to_f.round(2) }
    end
    report.total = Topic.time_to_first_response_total(category_id: report.category_id)
    report.prev30Days = Topic.time_to_first_response_total(start_date: report.start_date - 30.days, end_date: report.start_date, category_id: report.category_id)
  end

  def self.report_topics_with_no_response(report)
    report.category_filtering = true
    report.data = []
    Topic.with_no_response_per_day(report.start_date, report.end_date, report.category_id).each do |r|
      report.data << { x: r["date"], y: r["count"].to_i }
    end
    report.total = Topic.with_no_response_total(category_id: report.category_id)
    report.prev30Days = Topic.with_no_response_total(start_date: report.start_date - 30.days, end_date: report.start_date, category_id: report.category_id)
  end

  def self.report_emails(report)
    report_about report, EmailLog
  end

  def self.report_about(report, subject_class, report_method = :count_per_day)
    basic_report_about report, subject_class, report_method, report.start_date, report.end_date
    add_counts report, subject_class
  end

  def self.basic_report_about(report, subject_class, report_method, *args)
    report.data = []

    subject_class.send(report_method, *args).each do |date, count|
      report.data << { x: date, y: count }
    end
  end

  def self.add_prev_data(report, subject_class, report_method, *args)
    if report.modes.include?(:chart) && report.facets.include?(:prev_period)
      prev_data = subject_class.send(report_method, *args)
      report.prev_data = prev_data.map { |k, v| { x: k, y: v } }
    end
  end

  def self.add_counts(report, subject_class, query_column = 'created_at')
    if report.facets.include?(:prev_period)
      prev_data = subject_class
        .where("#{query_column} >= ? and #{query_column} < ?",
          report.prev_start_date,
          report.prev_end_date)

      report.prev_period = prev_data.count
    end

    if report.facets.include?(:total)
      report.total      = subject_class.count
    end

    if report.facets.include?(:prev30Days)
      report.prev30Days = subject_class
        .where("#{query_column} >= ? and #{query_column} < ?",
          report.start_date - 30.days,
          report.start_date).count
    end
  end

  def self.report_users_by_trust_level(report)
    report.data = []

    report.modes = [:table]

    report.dates_filtering = false

    report.labels = [
      { properties: [:key], title: I18n.t("reports.users_by_trust_level.labels.level") },
      { properties: [:y], title: I18n.t("reports.default.labels.count") },
    ]

    User.real.group('trust_level').count.sort.each do |level, count|
      key = TrustLevel.levels[level.to_i]
      url = Proc.new { |k| "/admin/users/list/#{k}" }
      report.data << { url: url.call(key), key: key, x: level.to_i, y: count }
    end
  end

  # Post action counts:
  def self.report_flags(report)
    report.category_filtering = true
    report.icon = 'flag'
    report.higher_is_better = false

    basic_report_about report, PostAction, :flag_count_by_date, report.start_date, report.end_date, report.category_id
    countable = PostAction.where(post_action_type_id: PostActionType.flag_types_without_custom.values)
    countable = countable.joins(post: :topic).where("topics.category_id = ?", report.category_id) if report.category_id
    add_counts report, countable, 'post_actions.created_at'
  end

  def self.report_likes(report)
    report.category_filtering = true
    report.icon = 'heart'
    post_action_report report, PostActionType.types[:like]
  end

  def self.report_bookmarks(report)
    report.category_filtering = true
    report.icon = 'bookmark'
    post_action_report report, PostActionType.types[:bookmark]
  end

  def self.post_action_report(report, post_action_type)
    report.data = []
    PostAction.count_per_day_for_type(post_action_type, category_id: report.category_id, start_date: report.start_date, end_date: report.end_date).each do |date, count|
      report.data << { x: date, y: count }
    end
    countable = PostAction.unscoped.where(post_action_type_id: post_action_type)
    countable = countable.joins(post: :topic).where("topics.category_id = ?", report.category_id) if report.category_id
    add_counts report, countable, 'post_actions.created_at'
  end

  def self.private_messages_report(report, topic_subtype)
    report.icon = 'envelope'
    subject = Topic.where('topics.user_id > 0')
    basic_report_about report, subject, :private_message_topics_count_per_day, report.start_date, report.end_date, topic_subtype
    subject = Topic.private_messages.where('topics.user_id > 0').with_subtype(topic_subtype)
    add_counts report, subject, 'topics.created_at'
  end

  def self.report_user_to_user_private_messages(report)
    report.icon = 'envelope'
    private_messages_report report, TopicSubtype.user_to_user
  end

  def self.report_user_to_user_private_messages_with_replies(report)
    report.icon = 'envelope'
    topic_subtype = TopicSubtype.user_to_user
    subject = Post.where('posts.user_id > 0')
    basic_report_about report, subject, :private_messages_count_per_day, report.start_date, report.end_date, topic_subtype
    subject = Post.private_posts.where('posts.user_id > 0').with_topic_subtype(topic_subtype)
    add_counts report, subject, 'posts.created_at'
  end

  def self.report_system_private_messages(report)
    report.icon = 'envelope'
    private_messages_report report, TopicSubtype.system_message
  end

  def self.report_moderator_warning_private_messages(report)
    report.icon = 'envelope'
    private_messages_report report, TopicSubtype.moderator_warning
  end

  def self.report_notify_moderators_private_messages(report)
    report.icon = 'envelope'
    private_messages_report report, TopicSubtype.notify_moderators
  end

  def self.report_notify_user_private_messages(report)
    report.icon = 'envelope'
    private_messages_report report, TopicSubtype.notify_user
  end

  def self.report_web_crawlers(report)
    report.labels = [
      { type: :string, properties: [:user_agent], title: I18n.t("reports.web_crawlers.labels.user_agent") },
      { properties: [:count], title: I18n.t("reports.web_crawlers.labels.page_views") }
    ]
    report.modes = [:table]
    report.data = WebCrawlerRequest.where('date >= ? and date <= ?', report.start_date, report.end_date)
      .limit(200)
      .order('sum_count DESC')
      .group(:user_agent).sum(:count)
      .map { |ua, count| { user_agent: ua, count: count } }
  end

  def self.report_users_by_type(report)
    report.data = []

    report.modes = [:table]

    report.dates_filtering = false

    report.labels = [
      { properties: [:x], title: I18n.t("reports.users_by_type.labels.type") },
      { properties: [:y], title: I18n.t("reports.default.labels.count") },
    ]

    label = Proc.new { |x| I18n.t("reports.users_by_type.xaxis_labels.#{x}") }
    url = Proc.new { |key| "/admin/users/list/#{key}" }

    admins = User.real.admins.count
    report.data << { url: url.call("admins"), icon: "shield", key: "admins", x: label.call("admin"), y: admins } if admins > 0

    moderators = User.real.moderators.count
    report.data << { url: url.call("moderators"), icon: "shield", key: "moderators", x: label.call("moderator"), y: moderators } if moderators > 0

    suspended = User.real.suspended.count
    report.data << { url: url.call("suspended"), icon: "ban", key: "suspended", x: label.call("suspended"), y: suspended } if suspended > 0

    silenced = User.real.silenced.count
    report.data << { url: url.call("silenced"), icon: "ban", key: "silenced", x: label.call("silenced"), y: silenced } if silenced > 0
  end

  def self.report_top_referred_topics(report)
    report.modes = [:table]

    report.labels = [
      { type: :link, properties: [:topic_title, :topic_url], title: I18n.t("reports.top_referred_topics.labels.topic") },
      { properties: [:num_clicks], title: I18n.t("reports.top_referred_topics.labels.num_clicks") }
    ]

    options = { end_date: report.end_date, start_date: report.start_date, limit: report.limit || 8 }
    result = nil
    report.timeout = wrap_slow_query do
      result = IncomingLinksReport.find(:top_referred_topics, options)
      report.data = result.data
    end
  end

  def self.report_top_traffic_sources(report)
    report.modes = [:table]

    report.labels = [
      { properties: [:domain], title: I18n.t("reports.top_traffic_sources.labels.domain") },
      { properties: [:num_clicks], title: I18n.t("reports.top_traffic_sources.labels.num_clicks") },
      { properties: [:num_topics], title: I18n.t("reports.top_traffic_sources.labels.num_topics") }
    ]

    options = { end_date: report.end_date, start_date: report.start_date, limit: report.limit || 8 }
    result = nil
    report.timeout = wrap_slow_query do
      result = IncomingLinksReport.find(:top_traffic_sources, options)
      report.data = result.data
    end
  end

  def self.report_trending_search(report)
    report.labels = [
      { properties: [:term], title: I18n.t("reports.trending_search.labels.term") },
      { properties: [:unique_searches], title: I18n.t("reports.trending_search.labels.searches") },
      { type: :percent, properties: [:ctr], title: I18n.t("reports.trending_search.labels.click_through") }
    ]

    report.data = []

    report.modes = [:table]

    select_sql = <<~SQL
      lower(term) term,
      COUNT(*) AS searches,
      SUM(CASE
               WHEN search_result_id IS NOT NULL THEN 1
               ELSE 0
           END) AS click_through,
      COUNT(DISTINCT ip_address) AS unique_searches
    SQL

    trends = SearchLog.select(select_sql)
      .where('created_at > ?  AND created_at <= ?', report.start_date, report.end_date)
      .group('lower(term)')
      .order('unique_searches DESC, click_through ASC, term ASC')
      .limit(report.limit || 20).to_a

    trends.each do |trend|
      ctr =
        if trend.click_through == 0 || trend.searches == 0
          0
        else
          trend.click_through.to_f / trend.searches.to_f
        end

      report.data << {
        term: trend.term,
        unique_searches: trend.unique_searches,
        ctr: (ctr * 100).ceil(1)
      }
    end
  end

  def self.report_moderators_activity(report)
    report.labels = [
      { type: :link, properties: [:username, :user_url], title: I18n.t("reports.moderators_activity.labels.moderator") },
      { properties: [:flag_count], title: I18n.t("reports.moderators_activity.labels.flag_count") },
      { type: :seconds, properties: [:time_read], title: I18n.t("reports.moderators_activity.labels.time_read") },
      { properties: [:topic_count], title: I18n.t("reports.moderators_activity.labels.topic_count") },
      { properties: [:pm_count], title: I18n.t("reports.moderators_activity.labels.pm_count") },
      { properties: [:post_count], title: I18n.t("reports.moderators_activity.labels.post_count") }
    ]

    report.modes = [:table]

    report.data = []
    mod_data = {}

    User.real.where(moderator: true).find_each do |u|
      mod_data[u.id] = {
        user_id: u.id,
        username: u.username,
        user_url: "/admin/users/#{u.id}/#{u.username}"
      }
    end

    time_read_query = <<~SQL
    SELECT SUM(uv.time_read) AS time_read,
    uv.user_id
    FROM user_visits uv
    JOIN users u
    ON u.id = uv.user_id
    WHERE u.moderator = 'true'
    AND u.id > 0
    AND uv.visited_at >= '#{report.start_date}'
    AND uv.visited_at <= '#{report.end_date}'
    GROUP BY uv.user_id
    SQL

    flag_count_query = <<~SQL
    WITH period_actions AS (
    SELECT agreed_by_id,
    disagreed_by_id
    FROM post_actions
    WHERE post_action_type_id IN (#{PostActionType.flag_types_without_custom.values.join(',')})
    AND created_at >= '#{report.start_date}'
    AND created_at <= '#{report.end_date}'
    ),
    agreed_flags AS (
    SELECT pa.agreed_by_id AS user_id,
    COUNT(*) AS flag_count
    FROM period_actions pa
    JOIN users u
    ON u.id = pa.agreed_by_id
    WHERE u.moderator = 'true'
    AND u.id > 0
    GROUP BY agreed_by_id
    ),
    disagreed_flags AS (
    SELECT pa.disagreed_by_id AS user_id,
    COUNT(*) AS flag_count
    FROM period_actions pa
    JOIN users u
    ON u.id = pa.disagreed_by_id
    WHERE u.moderator = 'true'
    AND u.id > 0
    GROUP BY disagreed_by_id
    )
    SELECT
    COALESCE(af.user_id, df.user_id) AS user_id,
    COALESCE(af.flag_count, 0) + COALESCE(df.flag_count, 0) AS flag_count
    FROM agreed_flags af
    FULL OUTER JOIN disagreed_flags df
    ON df.user_id = af.user_id
    SQL

    topic_count_query = <<~SQL
    SELECT t.user_id,
    COUNT(*) AS topic_count
    FROM topics t
    JOIN users u
    ON u.id = t.user_id
    WHERE u.moderator = 'true'
    AND u.id > 0
    AND t.archetype = 'regular'
    AND t.created_at >= '#{report.start_date}'
    AND t.created_at <= '#{report.end_date}'
    GROUP BY t.user_id
    SQL

    post_count_query = <<~SQL
    SELECT p.user_id,
    COUNT(*) AS post_count
    FROM posts p
    JOIN users u
    ON u.id = p.user_id
    JOIN topics t
    ON t.id = p.topic_id
    WHERE u.moderator = 'true'
    AND u.id > 0
    AND t.archetype = 'regular'
    AND p.created_at >= '#{report.start_date}'
    AND p.created_at <= '#{report.end_date}'
    GROUP BY p.user_id
    SQL

    pm_count_query = <<~SQL
    SELECT p.user_id,
    COUNT(*) AS pm_count
    FROM posts p
    JOIN users u
    ON u.id = p.user_id
    JOIN topics t
    ON t.id = p.topic_id
    WHERE u.moderator = 'true'
    AND u.id > 0
    AND t.archetype = 'private_message'
    AND p.created_at >= '#{report.start_date}'
    AND p.created_at <= '#{report.end_date}'
    GROUP BY p.user_id
    SQL

    DB.query(time_read_query).each do |row|
      mod_data[row.user_id][:time_read] = row.time_read
    end

    DB.query(flag_count_query).each do |row|
      mod_data[row.user_id][:flag_count] = row.flag_count
    end

    DB.query(topic_count_query).each do |row|
      mod_data[row.user_id][:topic_count] = row.topic_count
    end

    DB.query(post_count_query).each do |row|
      mod_data[row.user_id][:post_count] = row.post_count
    end

    DB.query(pm_count_query).each do |row|
      mod_data[row.user_id][:pm_count] = row.pm_count
    end

    report.data = mod_data.values
  end

  def self.report_flags_status(report)
    report.modes = [:table]

    report.labels = [
      { properties: [:action_type], title: I18n.t("reports.flags_status.labels.flag") },
      { type: :link, properties: [:staff_username, :staff_url], title: I18n.t("reports.flags_status.labels.assigned") },
      { type: :link, properties: [:poster_username, :poster_url], title: I18n.t("reports.flags_status.labels.poster") },
      { type: :link, properties: [:flagger_username, :flagger_url], title: I18n.t("reports.flags_status.labels.flagger") },
      { type: :seconds, properties: [:response_time], title: I18n.t("reports.flags_status.labels.time_to_resolution") }
    ]

    report.data = []

    flag_types = PostActionType.flag_types_without_custom

    sql = <<~SQL
    WITH period_actions AS (
    SELECT id,
    post_action_type_id,
    created_at,
    agreed_at,
    disagreed_at,
    deferred_at,
    agreed_by_id,
    disagreed_by_id,
    deferred_by_id,
    post_id,
    user_id,
    COALESCE(disagreed_at, agreed_at, deferred_at) AS responded_at
    FROM post_actions
    WHERE post_action_type_id IN (#{PostActionType.flag_types_without_custom.values.join(',')})
    AND created_at >= '#{report.start_date}'
    AND created_at <= '#{report.end_date}'
    ),
    poster_data AS (
    SELECT pa.id,
    p.user_id AS poster_id,
    u.username AS poster_username
    FROM period_actions pa
    JOIN posts p
    ON p.id = pa.post_id
    JOIN users u
    ON u.id = p.user_id
    ),
    flagger_data AS (
    SELECT pa.id,
    u.id AS flagger_id,
    u.username AS flagger_username
    FROM period_actions pa
    JOIN users u
    ON u.id = pa.user_id
    ),
    staff_data AS (
    SELECT pa.id,
    u.id AS staff_id,
    u.username AS staff_username
    FROM period_actions pa
    JOIN users u
    ON u.id = COALESCE(pa.agreed_by_id, pa.disagreed_by_id, pa.deferred_by_id)
    )
    SELECT
    sd.staff_username,
    sd.staff_id,
    pd.poster_username,
    pd.poster_id,
    fd.flagger_username,
    fd.flagger_id,
    pa.post_action_type_id,
    pa.created_at,
    pa.agreed_at,
    pa.disagreed_at,
    pa.deferred_at,
    pa.agreed_by_id,
    pa.disagreed_by_id,
    pa.deferred_by_id,
    COALESCE(pa.disagreed_at, pa.agreed_at, pa.deferred_at) AS responded_at
    FROM period_actions pa
    FULL OUTER JOIN staff_data sd
    ON sd.id = pa.id
    FULL OUTER JOIN flagger_data fd
    ON fd.id = pa.id
    FULL OUTER JOIN poster_data pd
    ON pd.id = pa.id
    SQL

    DB.query(sql).each do |row|
      data = {}
      data[:action_type] = flag_types.key(row.post_action_type_id).to_s
      data[:staff_username] = row.staff_username
      data[:staff_id] = row.staff_id
      if row.staff_username && row.staff_id
        data[:staff_url] = "/admin/users/#{row.staff_id}/#{row.staff_username}"
      end
      data[:poster_username] = row.poster_username
      data[:poster_id] = row.poster_id
      data[:poster_url] = "/admin/users/#{row.poster_id}/#{row.poster_username}"
      data[:flagger_id] = row.flagger_id
      data[:flagger_username] = row.flagger_username
      data[:flagger_url] = "/admin/users/#{row.flagger_id}/#{row.flagger_username}"
      if row.agreed_by_id
        data[:resolution] = I18n.t("reports.flags_status.values.agreed")
      elsif row.disagreed_by_id
        data[:resolution] = I18n.t("reports.flags_status.values.disagreed")
      elsif row.deferred_by_id
        data[:resolution] = I18n.t("reports.flags_status.values.deferred")
      else
        data[:resolution] = I18n.t("reports.flags_status.values.no_action")
      end
      data[:response_time] = row.responded_at ? row.responded_at - row.created_at : nil
      report.data << data
    end
  end

  def self.report_post_edits(report)
    report.modes = [:table]

    report.labels = [
      { type: :link, properties: [:post_id, :post_url], title: I18n.t("reports.post_edits.labels.post") },
      { type: :link, properties: [:editor_username, :editor_url], title: I18n.t("reports.post_edits.labels.editor") },
      { type: :link, properties: [:author_username, :author_url], title: I18n.t("reports.post_edits.labels.author") },
      { type: :text, properties: [:edit_reason], title: I18n.t("reports.post_edits.labels.edit_reason") }
    ]

    report.data = []

    sql = <<~SQL
    WITH period_revisions AS (
    SELECT pr.user_id AS editor_id,
    pr.number AS revision_version,
    pr.created_at,
    pr.post_id,
    u.username AS editor_username
    FROM post_revisions pr
    JOIN users u
    ON u.id = pr.user_id
    WHERE u.id > 0
    AND pr.created_at >= '#{report.start_date}'
    AND pr.created_at <= '#{report.end_date}'
    ORDER BY pr.created_at DESC
    LIMIT 20
    )
    SELECT pr.editor_id,
    pr.editor_username,
    p.user_id AS author_id,
    u.username AS author_username,
    pr.revision_version,
    p.version AS post_version,
    pr.post_id,
    p.topic_id,
    p.post_number,
    p.edit_reason,
    pr.created_at
    FROM period_revisions pr
    JOIN posts p
    ON p.id = pr.post_id
    JOIN users u
    ON u.id = p.user_id
    SQL

    DB.query(sql).each do |r|
      revision = {}
      revision[:editor_id] = r.editor_id
      revision[:editor_username] = r.editor_username
      revision[:editor_url] = "/admin/users/#{r.editor_id}/#{r.editor_username}"
      revision[:author_id] = r.author_id
      revision[:author_username] = r.author_username
      revision[:author_url] = "/admin/users/#{r.author_id}/#{r.author_username}"
      revision[:edit_reason] = r.revision_version == r.post_version ? r.edit_reason : nil
      revision[:created_at] = r.created_at
      revision[:post_id] = r.post_id
      revision[:post_url] = "/t/-/#{r.topic_id}/#{r.post_number}"

      report.data << revision
    end
  end
end