package service

import (
	"fmt"
	"strings"
	"yitao/model"

	"encoding/json"
)

type CommonService struct{}

type TypeSetting map[string]string
type TypeSettings map[string]TypeSetting

func (c *CommonService) GetSetting(key string) TypeSetting {
	settings_json := model.RedisRemember("nexus_settings_in_nexus", 600, func() interface{} {
		j, _ := json.Marshal(c.GetSettingsFromDB())
		return j
	})
	m := make(TypeSettings)
	json.Unmarshal([]byte(settings_json), &m)
	return m[key]
}

func (c *CommonService) GetSettingsFromDB() TypeSettings {
	// settings 表中的两个字段：name 和 value，把他们读取出来再组装成一个 map
	var results []struct {
		Name  string
		Value string
	}
	model.DB.Table("settings").Select("name", "value").Find(&results)
	// 从 results 中取出 name 和 value 组装成一个 map
	// 其中 name 的格式是 xxx.yyy ，那么就是一个嵌套的 map
	settings := make(TypeSettings)
	for _, result := range results {
		keys := strings.Split(result.Name, ".")
		if len(keys) == 1 {
			settings[keys[0]] = TypeSetting{keys[0]: result.Value}
		} else {
			if _, ok := settings[keys[0]]; !ok {
				settings[keys[0]] = TypeSetting{}
			}
			settings[keys[0]][keys[1]] = result.Value
		}
	}
	fmt.Printf("settings: %v\n", settings)
	return settings
}