package lobby_test

import (
	"context"
	"testing"

	"git.sunturtle.xyz/studio/shotgun/lobby"
	"git.sunturtle.xyz/studio/shotgun/player"
)

func TestQueue(t *testing.T) {
	const N = 1000 // must be even
	games := make([]lobby.GameID, 0, N)
	ch := make(chan lobby.GameID)
	l := lobby.New()
	for i := 0; i < 100; i++ {
		games = games[:0]
		for i := 0; i < N; i++ {
			i := i
			go func() {
				ch <- l.Queue(context.Background(), player.ID{uint8(i), uint8(i >> 8)})
			}()
		}
		for i := 0; i < N; i++ {
			games = append(games, <-ch)
		}
		// Every unique game ID should appear exactly twice.
		counts := make(map[lobby.GameID]int, N/2)
		for _, id := range games {
			counts[id]++
		}
		for id, c := range counts {
			if c != 2 {
				t.Errorf("game %v appears %d times", id, c)
			}
		}
		// Every game should have two different players.
		for _, id := range games {
			g := l.Game(id)
			if g == nil {
				t.Errorf("game %v was created but doesn't exist", g)
				continue
			}
			if g.CurrentPlayer().Is(g.Opponent()) {
				t.Errorf("game %v matched with self", id)
			}
		}
	}
}