package database

import (
	"context"
	"os"
	"path/filepath"
	"testing"

	"github.com/stretchr/testify/require"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
)

func TestMigrationCommandsRejectBlankPath(t *testing.T) {
	tests := map[string]func() error{
		"run":      func() error { return RunMigrations("invalid-url", " \t") },
		"steps":    func() error { return MigrateSteps("invalid-url", " \t", 1) },
		"rollback": func() error { return RollbackMigrations("invalid-url", " \t") },
		"force":    func() error { return ForceVersion("invalid-url", " \t", 1) },
		"version": func() error {
			_, _, err := CurrentVersion("invalid-url", " \t")
			return err
		},
	}

	for name, run := range tests {
		t.Run(name, func(t *testing.T) {
			require.EqualError(t, run(), "migration path must not be empty")
		})
	}
}

func TestWithSanitizedPQEnvironment(t *testing.T) {
	t.Setenv("PGSERVICE", "local-service")
	t.Setenv("PGSERVICEFILE", "/tmp/pg_service.conf")
	t.Setenv("PGREALM", "local-realm")

	err := withSanitizedPQEnvironment(func() error {
		for _, key := range []string{"PGSERVICE", "PGSERVICEFILE", "PGREALM"} {
			_, exists := os.LookupEnv(key)
			require.False(t, exists, "%s should be unset during migration", key)
		}
		return nil
	})
	require.NoError(t, err)
	require.Equal(t, "local-service", os.Getenv("PGSERVICE"))
	require.Equal(t, "/tmp/pg_service.conf", os.Getenv("PGSERVICEFILE"))
	require.Equal(t, "local-realm", os.Getenv("PGREALM"))
}

func TestSanitizePostgresEnvironment(t *testing.T) {
	t.Setenv("PGSERVICE", "local-service")
	t.Setenv("PGSERVICEFILE", "/tmp/pg_service.conf")
	t.Setenv("PGREALM", "local-realm")

	SanitizePostgresEnvironment()

	for _, key := range unsupportedPQEnvironmentKeys {
		_, exists := os.LookupEnv(key)
		require.False(t, exists, "%s should be removed at application startup", key)
	}
}

func TestLatestVersionAndCheckVersion(t *testing.T) {
	dir := t.TempDir()
	require.NoError(t, os.WriteFile(filepath.Join(dir, "000001_first.up.sql"), []byte("SELECT 1;"), 0o600))
	require.NoError(t, os.WriteFile(filepath.Join(dir, "000012_latest.up.sql"), []byte("SELECT 1;"), 0o600))
	require.NoError(t, os.WriteFile(filepath.Join(dir, "README"), nil, 0o600))

	latest, err := LatestVersion(dir)
	require.NoError(t, err)
	require.Equal(t, uint(12), latest)

	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
	require.NoError(t, err)
	require.NoError(t, db.Exec("CREATE TABLE schema_migrations (version INTEGER NOT NULL, dirty BOOLEAN NOT NULL)").Error)
	require.NoError(t, db.Exec("INSERT INTO schema_migrations(version, dirty) VALUES (12, false)").Error)
	require.NoError(t, CheckVersion(context.Background(), db, latest))
	require.Error(t, CheckVersion(context.Background(), db, 13))
	require.NoError(t, db.Exec("UPDATE schema_migrations SET dirty = true").Error)
	require.ErrorContains(t, CheckVersion(context.Background(), db, latest), "dirty")
}