package domain

import "testing"

func TestThreeTeamBracketResolvesWinnerAndLoserFeeds(t *testing.T) {
	draft, err := NewBracketDraft("event", []string{"a", "b", "c"})
	if err != nil {
		t.Fatal(err)
	}
	tournament, err := NewGraphTournament("cup", "event", "Cup", *draft)
	if err != nil {
		t.Fatal(err)
	}
	ready := tournament.ReadyMatches()
	if len(ready) != 1 || ready[0].TeamAID != "a" || ready[0].TeamBID != "b" {
		t.Fatalf("unexpected first match: %#v", ready)
	}
	if err = tournament.ApplySeries(Series{ID: ready[0].ID, TeamAID: "a", TeamBID: "b", WinnerTeamID: "a"}); err != nil {
		t.Fatal(err)
	}
	ready = tournament.ReadyMatches()
	if len(ready) != 1 || ready[0].TeamAID != "b" || ready[0].TeamBID != "c" {
		t.Fatalf("loser feed was not resolved: %#v", ready)
	}
	if err = tournament.ApplySeries(Series{ID: ready[0].ID, TeamAID: "b", TeamBID: "c", WinnerTeamID: "c"}); err != nil {
		t.Fatal(err)
	}
	ready = tournament.ReadyMatches()
	if len(ready) != 1 || ready[0].TeamAID != "a" || ready[0].TeamBID != "c" {
		t.Fatalf("final feed was not resolved: %#v", ready)
	}
	if err = tournament.ApplySeries(Series{ID: ready[0].ID, TeamAID: "a", TeamBID: "c", WinnerTeamID: "c"}); err != nil {
		t.Fatal(err)
	}
	if !tournament.Complete() || tournament.WinnerTeamID != "c" {
		t.Fatalf("unexpected champion: %q", tournament.WinnerTeamID)
	}
}

func TestBracketRejectsForwardReferencesAndMultipleFinals(t *testing.T) {
	draft := BracketDraft{
		EventID: "event", TeamIDs: []string{"a", "b"},
		Matches: []BracketMatch{
			{ID: "m1", Round: 0, SlotA: SlotSource{Kind: SlotWinner, MatchID: "m2"}, SlotB: SlotSource{Kind: SlotTeam, TeamID: "a"}},
			{ID: "m2", Round: 0, Order: 1, SlotA: SlotSource{Kind: SlotTeam, TeamID: "a"}, SlotB: SlotSource{Kind: SlotTeam, TeamID: "b"}},
		},
	}
	if err := draft.Validate(); err == nil {
		t.Fatal("expected invalid graph")
	}
}