package system

import (
	"strconv"

	"git.echol.cn/loser/Go-Web-Template/server/global"
	sysModel "git.echol.cn/loser/Go-Web-Template/server/model/system"
)

const (
	paramRegisterMode           = "auth.register_mode"
	paramRegisterRequireCaptcha = "auth.register_require_captcha"
	paramInviteExpireHours      = "auth.invite_code_expire_hours"
)

type RegisterMode string

const (
	RegisterModeClosed RegisterMode = "closed"
	RegisterModeOpen   RegisterMode = "open"
	RegisterModeInvite RegisterMode = "invite"
)

var allowedInviteExpireHours = map[int]bool{
	12:  true,
	24:  true,
	72:  true,
	168: true,
	720: true,
}

func getSysParamValue(key string) (string, bool) {
	var param sysModel.SysParams
	if err := global.GVA_DB.Where(sysModel.SysParams{Key: key}).First(&param).Error; err != nil {
		return "", false
	}
	return param.Value, true
}

func GetRegisterMode() RegisterMode {
	if v, ok := getSysParamValue(paramRegisterMode); ok {
		switch RegisterMode(v) {
		case RegisterModeClosed, RegisterModeOpen, RegisterModeInvite:
			return RegisterMode(v)
		}
	}
	return RegisterModeClosed
}

func GetRegisterRequireCaptcha() bool {
	if v, ok := getSysParamValue(paramRegisterRequireCaptcha); ok {
		return v == "1" || v == "true" || v == "on"
	}
	return false
}

func GetInviteExpireHours() int {
	if v, ok := getSysParamValue(paramInviteExpireHours); ok {
		if n, err := strconv.Atoi(v); err == nil {
			if allowedInviteExpireHours[n] {
				return n
			}
		}
	}
	return 24
}

// ---- 供 API 层调用的实例方法（避免跨包直接引用自由函数） ----

func (s *PublicRegisterService) RegisterMode() RegisterMode {
	return GetRegisterMode()
}

func (s *PublicRegisterService) RequireCaptcha() bool {
	return GetRegisterRequireCaptcha()
}

func (s *PublicRegisterService) InviteExpireHours() int {
	return GetInviteExpireHours()
}

func (s *InviteCodeService) InviteExpireHours() int {
	return GetInviteExpireHours()
}