package postgresql

import (
	"database/sql"
	"fmt"
	"os"
	"testing"

	"github.com/hashicorp/vault/helper/testhelpers/docker"
	"github.com/ory/dockertest"
)

func PrepareTestContainer(t *testing.T, version string) (cleanup func(), retURL string) {
	if os.Getenv("PG_URL") != "" {
		return func() {}, os.Getenv("PG_URL")
	}
	if version == "" {
		version = "latest"
	}

	pool, err := dockertest.NewPool("")
	if err != nil {
		t.Fatalf("Failed to connect to docker: %s", err)
	}

	resource, err := pool.Run("postgres", "latest", []string{"POSTGRES_PASSWORD=secret", "POSTGRES_DB=database"})
	if err != nil {
		t.Fatalf("Could not start local PostgreSQL docker container: %s", err)
	}

	cleanup = func() {
		docker.CleanupResource(t, pool, resource)
	}

	retURL = fmt.Sprintf("postgres://postgres:secret@localhost:%s/database?sslmode=disable", resource.GetPort("5432/tcp"))

	// exponential backoff-retry
	if err = pool.Retry(func() error {
		var err error
		var db *sql.DB
		db, err = sql.Open("postgres", retURL)
		if err != nil {
			return err
		}
		defer db.Close()
		return db.Ping()
	}); err != nil {
		cleanup()
		t.Fatalf("Could not connect to PostgreSQL docker container: %s", err)
	}

	return
}