//go:build mysql
// +build mysql

package mysql

import (
	"database/sql"
	"errors"

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

func (a *adapter) RealNamePolicy(tenantID t.TenantID) (*t.RealNamePolicy, error) {
	if !tenantID.IsValid() {
		return nil, t.ErrMalformed
	}
	db := a.registryDB
	if db == nil {
		db = a.db
	}
	if db == nil {
		return nil, t.ErrInternal
	}
	ctx, cancel := a.getContext()
	if cancel != nil {
		defer cancel()
	}
	var policy t.RealNamePolicy
	// 商户配置已并入 im_tenant（manager 仓库 im_tenant_merge_config.sql），实名政策兜底直查切到 im_tenant；
	// id AS tenant_id 保持扫描列名不变，ErrNoRows/未知列仍回退默认值，兼容阶段一迁移未执行的滚动发布窗口
	err := db.GetContext(ctx, &policy, `SELECT id AS tenant_id, realname_review_policy
		FROM im_tenant WHERE id=? LIMIT 1`, tenantID)
	if errors.Is(err, sql.ErrNoRows) {
		policy = *defaultRealNamePolicy(tenantID)
		return &policy, nil
	}
	if isUnknownColumn(err) {
		policy = *defaultRealNamePolicy(tenantID)
		return &policy, nil
	}
	if err != nil {
		return nil, err
	}
	policy.Normalize()
	return &policy, nil
}

func defaultRealNamePolicy(tenantID t.TenantID) *t.RealNamePolicy {
	policy := &t.RealNamePolicy{
		TenantID:     tenantID,
		ReviewPolicy: t.RealNameReviewPolicyNone,
	}
	policy.Normalize()
	return policy
}