package migrate

import (
	"os"
	"path/filepath"
	"runtime"
	"testing"
)

func TestRunMigrationsUpTwice(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test in short mode")
	}

	databaseURL := os.Getenv("INTEGRATION_DB_URL")
	if databaseURL == "" {
		t.Skip("set INTEGRATION_DB_URL to run migration integration tests")
	}

	cfg := MigrationConfig{Path: resolveMigrationsPath()}
	if err := RunMigrationsUp(databaseURL, cfg); err != nil {
		t.Fatalf("first migrate up: %v", err)
	}
	if err := RunMigrationsUp(databaseURL, cfg); err != nil {
		t.Fatalf("second migrate up: %v", err)
	}

	status, err := GetMigrationStatus(databaseURL, cfg)
	if err != nil {
		t.Fatalf("get migration status: %v", err)
	}
	if status.Dirty {
		t.Fatalf("expected non-dirty migration status")
	}
	if status.Version == 0 {
		t.Fatalf("expected migration version > 0 after up")
	}
}

func resolveMigrationsPath() string {
	configured := os.Getenv("DB_MIGRATIONS_PATH")
	if configured == "" {
		configured = "migrations"
	}

	if filepath.IsAbs(configured) {
		return configured
	}
	if len(configured) >= len("file://") && configured[:len("file://")] == "file://" {
		return configured
	}
	if _, err := os.Stat(configured); err == nil {
		return configured
	}

	_, thisFile, _, ok := runtime.Caller(0)
	if !ok {
		return configured
	}
	moduleRoot := filepath.Clean(filepath.Join(filepath.Dir(thisFile), "..", ".."))
	candidate := filepath.Join(moduleRoot, configured)
	if _, err := os.Stat(candidate); err == nil {
		return candidate
	}

	return configured
}