package domain

import (
	"errors"
	"testing"
	"time"
)

func TestProposalRequiresUnanimousAcceptance(t *testing.T) {
	now := time.Unix(1000, 0)
	p, err := NewProposal("proposal-123456789", Casual, []string{"b", "a"}, now)
	if err != nil {
		t.Fatal(err)
	}
	if _, err = p.Respond("a", "response-a-123456", true, 0, now); err != nil {
		t.Fatal(err)
	}
	if p.State != Open || p.Revision != 1 {
		t.Fatalf("partial acceptance closed proposal: %+v", p)
	}
	if _, err = p.Respond("b", "response-b-123456", true, 1, now); err != nil {
		t.Fatal(err)
	}
	if p.State != Accepted || p.Revision != 2 {
		t.Fatalf("unanimous acceptance not committed: %+v", p)
	}
}

func TestProposalResponseReplayIsStableAndPayloadReuseConflicts(t *testing.T) {
	now := time.Unix(1000, 0)
	p, err := NewProposal("proposal-123456789", Casual, []string{"a", "b"}, now)
	if err != nil {
		t.Fatal(err)
	}
	first, err := p.Respond("a", "response-a-123456", true, 0, now)
	if err != nil {
		t.Fatal(err)
	}
	replay, err := p.Respond("a", "response-a-123456", true, 0, now.Add(20*time.Second))
	if err != nil || replay.Revision != first.Revision {
		t.Fatalf("replay = %+v, %v", replay, err)
	}
	if _, err = p.Respond("a", "response-a-123456", false, 1, now); !errors.Is(err, ErrConflict) {
		t.Fatalf("payload reuse error = %v", err)
	}
}

func TestProposalExpiryTimesOutPendingParticipantsAndClosesRace(t *testing.T) {
	now := time.Unix(1000, 0)
	p, err := NewProposal("proposal-123456789", Ranked, []string{"a", "b", "c", "d", "e", "f"}, now)
	if err != nil {
		t.Fatal(err)
	}
	if !p.Expire(now.Add(ProposalWindow)) || p.State != Expired || p.Revision != 1 {
		t.Fatalf("expiry failed: %+v", p)
	}
	for _, participant := range p.Participants {
		if participant.Response != TimedOutResponse {
			t.Fatalf("pending participant not timed out: %+v", participant)
		}
	}
	if _, err = p.Respond("a", "late-response-123", true, 1, now.Add(ProposalWindow)); !errors.Is(err, ErrProposalClosed) {
		t.Fatalf("late response error = %v", err)
	}
}

func TestRankedProposalAndCooldownEscalation(t *testing.T) {
	now := time.Unix(1000, 0)
	if _, err := NewProposal("proposal-123456789", Ranked, []string{"a", "b"}, now); err == nil {
		t.Fatal("ranked proposal accepted fewer than six")
	}
	if got := CooldownUntil([]CooldownEvent{{At: now, Playlist: Ranked, Kind: DeclinedResponse}}, Ranked, now); !got.Equal(now.Add(2 * time.Minute)) {
		t.Fatalf("ranked decline cooldown = %v", got)
	}
	events := []CooldownEvent{{At: now, Playlist: Ranked, Kind: TimedOutResponse}, {At: now.Add(time.Minute), Playlist: Ranked, Kind: DeclinedResponse}, {At: now.Add(2 * time.Minute), Playlist: Ranked, Kind: TimedOutResponse}}
	if got := CooldownUntil(events, Ranked, now.Add(2*time.Minute)); !got.Equal(now.Add(17 * time.Minute)) {
		t.Fatalf("ranked escalation cooldown = %v", got)
	}
}