package srv_cfg

import (
	"context"
	"fmt"
	"strings"
	"videoweb/pub/common/srvdef"
	"videoweb/pub/models/cfg"

	"go.mongodb.org/mongo-driver/bson"
)

// GetSystemConfig 得到系统配置
func GetSystemConfig(ctx context.Context) (*cfg.SysCfg, *srvdef.SrvErr) {
	filter := bson.M{
		cfg.FN.SysCfg.Id: 1, //固定id
	}
	sysCfg, serr := cfg.FindOneSysCfg(ctx, filter)
	if serr != nil {
		return nil, serr
	}
	return sysCfg, nil
}

// emptyWatermark 水印字段为空时也写入空字符串，避免 omitempty 跳过导致旧值残留
func emptyWatermark(v *string) *string {
	empty := ""
	if v == nil || strings.TrimSpace(*v) == "" {
		return &empty
	}
	s := strings.TrimSpace(*v)
	return &s
}

func applyEmptyWatermarkFields(info *SysCfgUpdate) {
	if info == nil {
		return
	}
	info.WatermarkImage = emptyWatermark(info.WatermarkImage)
	info.WatermarkMedia = emptyWatermark(info.WatermarkMedia)
	info.WatermarkMediaTop = emptyWatermark(info.WatermarkMediaTop)
	info.WatermarkMediaTopRight = emptyWatermark(info.WatermarkMediaTopRight)
	info.WatermarkMediaBottomLeft = emptyWatermark(info.WatermarkMediaBottomLeft)
}

// UpdateSystemConfig 更新系统配置
func UpdateSystemConfig(ctx context.Context, info *SysCfgUpdate) *srvdef.SrvErr {
	applyEmptyWatermarkFields(info)
	filter := bson.M{
		cfg.FN.SysCfg.Id: 1, //固定id
	}
	fmt.Println("filter", filter)
	updateDoc := bson.M{"$set": info}
	serr := cfg.UpdateOneSysCfg(ctx, filter, updateDoc)
	if serr != nil {
		return serr
	}

	return nil
}