package sqlstore

import (
	"errors"
	"net/url"
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"github.com/grafana/grafana/pkg/services/featuremgmt"
	"github.com/grafana/grafana/pkg/setting"
)

type databaseConfigTest struct {
	name       string
	dbType     string
	dbHost     string
	dbURL      string
	dbUser     string
	dbPwd      string
	expConnStr string
	features   featuremgmt.FeatureToggles
	err        error
}

var databaseConfigTestCases = []databaseConfigTest{
	{
		name:       "MySQL IPv4",
		dbType:     "mysql",
		dbHost:     "1.2.3.4:5678",
		expConnStr: ":@tcp(1.2.3.4:5678)/test_db?collation=utf8mb4_unicode_ci&allowNativePasswords=true&clientFoundRows=true",
	},
	{
		name:       "Postgres IPv4",
		dbType:     "postgres",
		dbHost:     "1.2.3.4:5678",
		expConnStr: "user='' host=1.2.3.4 port=5678 dbname=test_db sslmode='' sslcert='' sslkey='' sslrootcert=''",
	},
	{
		name:       "Postgres IPv4 (Default Port)",
		dbType:     "postgres",
		dbHost:     "1.2.3.4",
		expConnStr: "user='' host=1.2.3.4 port=5432 dbname=test_db sslmode='' sslcert='' sslkey='' sslrootcert=''",
	},
	{
		name:       "Postgres username and password",
		dbType:     "postgres",
		dbHost:     "1.2.3.4",
		dbUser:     "grafana",
		dbPwd:      "password",
		expConnStr: "user=grafana host=1.2.3.4 port=5432 dbname=test_db sslmode='' sslcert='' sslkey='' sslrootcert='' password=password",
	},
	{
		name:       "Postgres username no password",
		dbType:     "postgres",
		dbHost:     "1.2.3.4",
		dbUser:     "grafana",
		dbPwd:      "",
		expConnStr: "user=grafana host=1.2.3.4 port=5432 dbname=test_db sslmode='' sslcert='' sslkey='' sslrootcert=''",
	},
	{
		name:       "MySQL IPv4 (Default Port)",
		dbType:     "mysql",
		dbHost:     "1.2.3.4",
		expConnStr: ":@tcp(1.2.3.4)/test_db?collation=utf8mb4_unicode_ci&allowNativePasswords=true&clientFoundRows=true",
	},
	{
		name:       "MySQL IPv6",
		dbType:     "mysql",
		dbHost:     "[fe80::24e8:31b2:91df:b177]:1234",
		expConnStr: ":@tcp([fe80::24e8:31b2:91df:b177]:1234)/test_db?collation=utf8mb4_unicode_ci&allowNativePasswords=true&clientFoundRows=true",
	},
	{
		name:       "Postgres IPv6",
		dbType:     "postgres",
		dbHost:     "[fe80::24e8:31b2:91df:b177]:1234",
		expConnStr: "user='' host=fe80::24e8:31b2:91df:b177 port=1234 dbname=test_db sslmode='' sslcert='' sslkey='' sslrootcert=''",
	},
	{
		name:       "MySQL IPv6 (Default Port)",
		dbType:     "mysql",
		dbHost:     "[::1]",
		expConnStr: ":@tcp([::1])/test_db?collation=utf8mb4_unicode_ci&allowNativePasswords=true&clientFoundRows=true",
	},
	{
		name:       "Postgres IPv6 (Default Port)",
		dbType:     "postgres",
		dbHost:     "[::1]",
		expConnStr: "user='' host=::1 port=5432 dbname=test_db sslmode='' sslcert='' sslkey='' sslrootcert=''",
	},
	{
		name:  "Invalid database URL",
		dbURL: "://invalid.com/",
		err:   &url.Error{Op: "parse", URL: "://invalid.com/", Err: errors.New("missing protocol scheme")},
	},
	{
		name:       "MySQL with ANSI_QUOTES mode",
		dbType:     "mysql",
		dbHost:     "[::1]",
		features:   featuremgmt.WithFeatures(featuremgmt.FlagMysqlAnsiQuotes),
		expConnStr: ":@tcp([::1])/test_db?collation=utf8mb4_unicode_ci&allowNativePasswords=true&clientFoundRows=true&sql_mode='ANSI_QUOTES'",
	},
}

func TestIntegrationSQLConnectionString(t *testing.T) {
	if testing.Short() {
		t.Skip("skipping integration test")
	}
	for _, testCase := range databaseConfigTestCases {
		t.Run(testCase.name, func(t *testing.T) {
			cfg := makeDatabaseTestConfig(t, testCase)
			dbCfg, err := NewDatabaseConfig(cfg, testCase.features)
			require.Equal(t, testCase.err, err)
			if testCase.expConnStr != "" {
				assert.Equal(t, testCase.expConnStr, dbCfg.ConnectionString)
			}
		})
	}
}

func makeDatabaseTestConfig(t *testing.T, tc databaseConfigTest) *setting.Cfg {
	t.Helper()

	if tc.features == nil {
		tc.features = featuremgmt.WithFeatures()
	}
	// nolint:staticcheck
	cfg := setting.NewCfgWithFeatures(tc.features.IsEnabledGlobally)

	sec, err := cfg.Raw.NewSection("database")
	require.NoError(t, err)
	_, err = sec.NewKey("type", tc.dbType)
	require.NoError(t, err)
	_, err = sec.NewKey("host", tc.dbHost)
	require.NoError(t, err)
	_, err = sec.NewKey("url", tc.dbURL)
	require.NoError(t, err)
	_, err = sec.NewKey("user", tc.dbUser)
	require.NoError(t, err)
	_, err = sec.NewKey("name", "test_db")
	require.NoError(t, err)
	_, err = sec.NewKey("password", tc.dbPwd)
	require.NoError(t, err)

	return cfg
}