//go:build mysql
// +build mysql

package mysql

import (
	"database/sql"
	"strings"

	"github.com/jmoiron/sqlx"
	t "github.com/tinode/chat/server/store/types"
)

func (a *adapter) ThirdPartyConfig(group string, keys ...string) (map[string]string, error) {
	db := a.registryDB
	if db == nil {
		db = a.db
	}
	if db == nil {
		return nil, t.ErrInternal
	}
	group = strings.TrimSpace(group)
	if group == "" {
		return nil, t.ErrMalformed
	}

	ctx, cancel := a.getContext()
	if cancel != nil {
		defer cancel()
	}

	rows := []struct {
		Key   string `db:"key"`
		Value string `db:"value"`
	}{}
	var err error
	if len(keys) == 0 {
		err = db.SelectContext(ctx, &rows, `SELECT `+"`key`"+`, value FROM hg_sys_config
			WHERE `+"`group`"+`=? AND status=1`, group)
	} else {
		normalized := make([]string, 0, len(keys))
		for _, key := range keys {
			if key = strings.TrimSpace(key); key != "" {
				normalized = append(normalized, key)
			}
		}
		if len(normalized) == 0 {
			return map[string]string{}, nil
		}
		query, args, inErr := sqlx.In(`SELECT `+"`key`"+`, value FROM hg_sys_config
			WHERE `+"`group`"+`=? AND status=1 AND `+"`key`"+` IN (?)`, group, normalized)
		if inErr != nil {
			return nil, inErr
		}
		query = db.Rebind(query)
		err = db.SelectContext(ctx, &rows, query, args...)
	}
	if err != nil {
		if err == sql.ErrNoRows {
			return map[string]string{}, nil
		}
		return nil, err
	}

	result := make(map[string]string, len(rows))
	for _, row := range rows {
		result[row.Key] = row.Value
	}
	return result, nil
}