#!/usr/bin/env ruby
# -*- coding: utf-8 -*-
require 'em-websocket'
require 'set'
require 'json'
require 'uri'
require 'time'

# WebSocket ポート
WS_PORT = 8804

# --- 変数定義 ---
clients = Set.new
participants = {}
team_points = Hash.new(0)
raised_queue = []
selected_url = nil
penalty_box = {}

# --- ヘルパーメソッド ---
def broadcast_teams_and_points(clients, participants_hash, points_hash)
  team_list = participants_hash.values.sort_by { |p| [p[:group], p[:name]] }
  payload = { type: 'update_teams', teams: team_list, points: points_hash }.to_json
  clients.each { |c| c.send(payload) }
  puts "[BROADCAST] チームとポイント情報を更新しました。"
end

def broadcast_queue(clients, queue)
    payload = { type: "announce", queue: queue }.to_json
    clients.each { |c| c.send(payload) }
end

def broadcast_penalty_info(clients, penalty_hash)
  payload = { type: "penalty_update", penalties: penalty_hash }.to_json
  clients.each { |c| c.send(payload) }
end


# --- サーバー起動 ---
trap('INT') do
  puts "\n[INTERRUPT] シャットダウン中..."
  EM.stop if EM.reactor_running?
end

puts "WebSocket Server starting on port #{WS_PORT}..."

EM.run do
  # 30秒ごとにPingを送信
  EM.add_periodic_timer(30) do
    clients.each { |ws| ws.ping if ws.state == :connected }
  end

  # 1秒ごとにペナルティ情報を更新・通知
  EM.add_periodic_timer(1) do
    penalty_box.delete_if { |group, expiry_time| Time.now >= expiry_time }
    broadcast_penalty_info(clients, penalty_box)
  end

  EM::WebSocket.start(host: "0.0.0.0", port: WS_PORT) do |ws_conn|
    
    ws_conn.onopen do
      puts "[OPEN] クライアント接続: #{clients.size + 1} 名"
      clients << ws_conn
      ws_conn.send({ type: "info", message: "うっす！ WebSocket 接続完了" }.to_json)
      ws_conn.send({ type: 'update_teams', teams: participants.values.sort_by{|p| [p[:group], p[:name]]}, points: team_points }.to_json)
      ws_conn.send({ type: "announce", queue: raised_queue }.to_json)
    end
    
    ws_conn.onmessage do |msg|
      puts "[RECV] #{msg}"
      begin
        data = JSON.parse(msg)
        case data["type"]
        when "join"
          participants[ws_conn] = { group: data["group"], name: data["name"] }
          puts "[JOIN] #{data['group']} の #{data['name']} さんが参加しました。"
          broadcast_teams_and_points(clients, participants, team_points)
        
        # ▼▼▼【ここを修正】ペナルティチェックを、より正確な時刻比較に変更 ▼▼▼
        when "raise"
          participant_info = participants[ws_conn]
          if participant_info
            group = participant_info[:group]
            
            # ペナルティ中か？ (penalty_boxに存在し、かつ、現在時刻 < 解除時刻)
            if penalty_box[group] && Time.now < penalty_box[group]
              puts "[PENALTY] #{group} はペナルティ中のため、#{participant_info[:name]} さんの挙手をブロックしました。"
            elsif raised_queue.any? { |p| p[:group] == group }
              puts "[REJECT] #{group} は既にキューにいるため、#{participant_info[:name]} さんの挙手をブロックしました。"
            else
              raised_queue << participant_info
              puts "[RAISE] #{group} の #{participant_info[:name]} さんが挙手。"
              broadcast_queue(clients, raised_queue)
            end
          end
        
        # (その他のcaseは変更なし)
        # ...
        when "reset"
          raised_queue.clear
          penalty_box.clear
          puts "[RESET] 挙手者キューとペナルティをリセットしました"
          broadcast_queue(clients, raised_queue)
          clients.each { |c| c.send({ type: "stop" }.to_json) }
        when "correct"
          if first_raiser = raised_queue.first
            group = first_raiser[:group]
            team_points[group] += 5
            puts "[CORRECT] #{group} に 5ポイント加算！ 合計: #{team_points[group]}点"
            payload = { type: "correct", answer: data["answer"], raiser: first_raiser }.to_json
            clients.each { |c| c.send(payload) }
            raised_queue.clear
            penalty_box.clear
            broadcast_teams_and_points(clients, participants, team_points)
            broadcast_queue(clients, raised_queue)
          end
        when "incorrect"
          if incorrect_participant = raised_queue.shift
             group = incorrect_participant[:group]
             penalty_until = Time.now + 8
             penalty_box[group] = penalty_until
             puts "[INCORRECT] #{group} は #{penalty_until.strftime('%H:%M:%S')} までペナルティ。"
             broadcast_penalty_info(clients, penalty_box)
             clients.each { |c| c.send({type: "incorrect"}.to_json) }
             EM.add_timer(1) do
                puts "[TIMER] 1秒経過..."
                if raised_queue.empty?
                  puts "[AUTO PLAY] 回答者がいないため、再生を再開します。"
                  clients.each { |c| c.send({ type: "play" }.to_json) }
                  broadcast_queue(clients, raised_queue)
                else
                  puts "更新されたキューを送信します。"
                  broadcast_queue(clients, raised_queue)
                end
             end
          end
        when "select"
          selected_url = "http://192.168.1.138:8890/#{URI.encode_uri_component(data["file"])}"
          penalty_box.clear
          clients.each { |c| c.send({ type: "select", url: selected_url }.to_json) }
        when "reset_scores"
          team_points.clear
          puts "[SCORE RESET] 全チームの得点をリセットしました。"
          broadcast_teams_and_points(clients, participants, team_points)
        when "adjust_score"
          group = data["group"]
          score = data["score"].to_i
          if group && score
            team_points[group] += score
            puts "[ADJUST SCORE] #{group} の得点を #{score}点 調整。合計: #{team_points[group]}点"
            broadcast_teams_and_points(clients, participants, team_points)
          end
        when "play"
          clients.each { |c| c.send({ type: "play" }.to_json) } if selected_url
        when "pause"
          clients.each { |c| c.send({ type: "pause" }.to_json) }
        when "stop"
          clients.each { |c| c.send({ type: "stop" }.to_json) }
        when "show_answer"
          clients.each { |c| c.send(msg) }
        else
          puts "[WARN] 未知のメッセージタイプを受信: #{data['type']}"
        end
      rescue JSON::ParserError => e
        puts "[ERROR] JSONパースエラー: #{e.message}"
      end
    end

    ws_conn.onclose do
      puts "[CLOSE] 切断: 残り #{clients.size - 1} 名"
      clients.delete(ws_conn)
      if participant = participants.delete(ws_conn)
        puts "[LEAVE] #{participant[:group]} の #{participant[:name]} さんが退出しました。"
        if raised_queue.delete(participant)
            puts "切断した参加者がキューにいたため、キュー情報を更新します。"
            broadcast_queue(clients, raised_queue)
        end
        broadcast_teams_and_points(clients, participants, team_points)
      end
    end
  end
end