package cassandra

import (
	"context"
	"fmt"
	"strconv"
	"testing"

	"github.com/testcontainers/testcontainers-go"
	"github.com/testcontainers/testcontainers-go/wait"
)

// startCassandraContainer 啟動 Cassandra 測試容器
func startCassandraContainer(ctx context.Context) (string, string, func(), error) {
	req := testcontainers.ContainerRequest{
		Image:        "cassandra:4.1",
		ExposedPorts: []string{"9042/tcp"},
		WaitingFor:   wait.ForListeningPort("9042/tcp"),
		Env: map[string]string{
			"CASSANDRA_CLUSTER_NAME": "test-cluster",
		},
	}

	cassandraC, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{
		ContainerRequest: req,
		Started:          true,
	})
	if err != nil {
		return "", "", nil, fmt.Errorf("failed to start Cassandra container: %w", err)
	}

	port, err := cassandraC.MappedPort(ctx, "9042")
	if err != nil {
		cassandraC.Terminate(ctx)
		return "", "", nil, fmt.Errorf("failed to get mapped port: %w", err)
	}

	host, err := cassandraC.Host(ctx)
	if err != nil {
		cassandraC.Terminate(ctx)
		return "", "", nil, fmt.Errorf("failed to get host: %w", err)
	}

	tearDown := func() {
		_ = cassandraC.Terminate(ctx)
	}

	fmt.Printf("Cassandra test container started: %s:%s\n", host, port.Port())

	return host, port.Port(), tearDown, nil
}

// setupTestDB 設置測試用的 DB 實例
func setupTestDB(t testing.TB) (*DB, func()) {
	ctx := context.Background()
	host, port, tearDown, err := startCassandraContainer(ctx)
	if err != nil {
		t.Fatalf("Failed to start Cassandra container: %v", err)
	}

	portInt, err := strconv.Atoi(port)
	if err != nil {
		tearDown()
		t.Fatalf("Failed to convert port to int: %v", err)
	}

	db, err := New(
		WithHosts(host),
		WithPort(portInt),
		WithKeyspace("test_keyspace"),
	)
	if err != nil {
		tearDown()
		t.Fatalf("Failed to create DB: %v", err)
	}

	// 創建 keyspace
	createKeyspaceStmt := "CREATE KEYSPACE IF NOT EXISTS test_keyspace WITH replication = {'class': 'SimpleStrategy', 'replication_factor': 1}"
	if err := db.session.Query(createKeyspaceStmt, nil).Exec(); err != nil {
		db.Close()
		tearDown()
		t.Fatalf("Failed to create keyspace: %v", err)
	}

	cleanup := func() {
		db.Close()
		tearDown()
	}

	return db, cleanup
}