require "rails_helper"

RSpec.describe MatchmakingChannel, type: :channel do
  let(:user) { User.create!(nickname: "Blackbeard", password: "password123", rating: 1250) }

  before do
    stub_connection current_user: user
  end

  describe "#subscribed" do
    it "subscribes successfully and streams from the user's private channel" do
      subscribe
      expect(subscription).to be_confirmed
      expect(subscription).to have_stream_from("matchmaking:#{user.id}")
      expect(transmissions).to be_empty
    end

    it "transmits a claimed match if one was ready before or during connection" do
      match_payload = {
        type: "matched",
        match_id: "test-match-uuid",
        game_token: "jwt-game-token",
        game_server: "ws://localhost:8080",
        players: [ user.id, 999 ]
      }
      allow(MatchmakingService).to receive(:claim).with(user.id).and_return(match_payload)

      subscribe

      expect(subscription).to be_confirmed
      expect(transmissions.last).to eq(match_payload.as_json)
    end
  end

  describe "#start" do
    it "calls MatchmakingService.enqueue with the user's id and current rating" do
      subscribe

      expect(MatchmakingService).to receive(:enqueue).with(user.id, rating: 1250)
      perform :start
    end

    it "accepts extra parameters in data hash without error" do
      subscribe

      expect(MatchmakingService).to receive(:enqueue).with(user.id, rating: 1250)
      perform :start, { "custom" => "data" }
    end
  end

  describe "#stop" do
    it "calls MatchmakingService.cancel for the current user" do
      subscribe

      expect(MatchmakingService).to receive(:cancel).with(user.id)
      perform :stop
    end
  end

  describe "#unsubscribed" do
    it "cancels matchmaking search when unsubscribing" do
      subscribe

      expect(MatchmakingService).to receive(:cancel).with(user.id)
      unsubscribe
    end
  end
end