package store

import (
	"context"
	"testing"
	"time"

	"github.com/alicebob/miniredis/v2"
	"github.com/cosmic-clash/cosmic-clash/server/domain"
	"github.com/redis/go-redis/v9"
)

func TestRedisCandidateIndexRebuildSnapshotAndRemove(t *testing.T) {
	mini, err := miniredis.Run()
	if err != nil {
		t.Fatal(err)
	}
	defer mini.Close()
	client := redis.NewClient(&redis.Options{Addr: mini.Addr()})
	defer client.Close()
	index := RedisCandidateIndex{Client: client, Prefix: "integration", TTL: time.Minute}
	now := time.Unix(1000, 0).UTC()
	candidates := []domain.Candidate{
		{TicketID: "ticket-b", PlayerID: "player-b", EnqueuedAt: now.Add(time.Second)},
		{TicketID: "ticket-a", PlayerID: "player-a", EnqueuedAt: now},
	}
	if err := index.Rebuild(context.Background(), candidates); err != nil {
		t.Fatal(err)
	}
	got, err := index.Snapshot(context.Background(), now)
	if err != nil {
		t.Fatal(err)
	}
	if len(got) != 1 || got[0].TicketID != "ticket-a" {
		t.Fatalf("snapshot before future candidate = %+v", got)
	}
	if err := index.Remove(context.Background(), "ticket-a"); err != nil {
		t.Fatal(err)
	}
	got, err = index.Snapshot(context.Background(), now.Add(2*time.Second))
	if err != nil {
		t.Fatal(err)
	}
	if len(got) != 1 || got[0].TicketID != "ticket-b" {
		t.Fatalf("snapshot after remove = %+v", got)
	}
	if ttl, err := client.TTL(context.Background(), "integration:queue:candidates:data").Result(); err != nil || ttl <= 0 {
		t.Fatalf("candidate data TTL = %v, err = %v", ttl, err)
	}
}

func TestRedisCandidateIndexRejectsInvalidAndDuplicateRebuilds(t *testing.T) {
	index := RedisCandidateIndex{TTL: time.Minute}
	if err := index.Rebuild(context.Background(), nil); err == nil {
		t.Fatal("nil Redis client accepted")
	}
	mini, err := miniredis.Run()
	if err != nil {
		t.Fatal(err)
	}
	defer mini.Close()
	client := redis.NewClient(&redis.Options{Addr: mini.Addr()})
	defer client.Close()
	index.Client = client
	candidate := domain.Candidate{TicketID: "ticket-a", PlayerID: "player-a", EnqueuedAt: time.Unix(1000, 0)}
	if err := index.Rebuild(context.Background(), []domain.Candidate{candidate, candidate}); err == nil {
		t.Fatal("duplicate candidate accepted")
	}
	if err := index.Upsert(context.Background(), domain.Candidate{TicketID: "", PlayerID: "player-a", EnqueuedAt: candidate.EnqueuedAt}); err == nil {
		t.Fatal("invalid candidate accepted")
	}
}