package model

import (
	"context"
	"errors"
	"icloudapp.cn/tools/service"
	utString "icloudapp.cn/tools/util/string"
	url2 "icloudapp.cn/tools/util/url"
	"net/url"
	"strings"
)

type MRoles struct {
	ctx context.Context
}

func NewMRoles(ctx context.Context) *MRoles {
	return &MRoles{
		ctx: ctx,
	}
}

func (r *MRoles) Verify(uid int64, URL *url.URL) (bool, error) {
	if uid == 0 {
		return false, errors.New("请先登录后再试")
	}

	userGroups := service.NewUserGroup(r.ctx).UserGroups(uid)
	if userGroups == nil {
		return false, errors.New("无访问组权限")
	}

	splitGroups := strings.Split(userGroups.Groups, ",")

	var groupsID []int64
	for _, v := range splitGroups {
		groupsID = append(groupsID, utString.ConvertInt64(v))
	}
	if len(groupsID) == 0 {
		return false, errors.New("无访问组权限")
	}

	//获取分组对应的权限
	groupsField, _ := service.NewGroup(r.ctx).Infos(groupsID...)

	if groupsField == nil {
		return false, errors.New("无权限访问")
	}

	var rolesID strings.Builder

	for _, v := range groupsField {
		if v == nil {
			continue
		}
		rolesID.WriteString(v.Roles + ",")
	}
	//获取权限对应的model
	roles := uniqueToInt64(rolesID.String(), ",")

	if len(roles) == 0 {
		return false, errors.New("无权限访问")
	}
	mRole := service.NewRoles(r.ctx)
	modelsField, _ := mRole.Infos(roles...)
	if modelsField == nil {
		return false, errors.New("无模块访问权限")
	}
	var modelIds strings.Builder
	for _, v := range modelsField {
		modelIds.WriteString(v.ModelIds + ",")
	}
	//获取对应的model
	modulesId := uniqueToInt64(modelIds.String(), ",")
	modules := service.NewModule(r.ctx)
	moduleField, _ := modules.Infos(modulesId...)

	if moduleField == nil {
		return false, errors.New("无模块访问权限")
	}
	//验证request是否有权限
	matchedURL := make([]string, 0)
	for _, module := range moduleField {
		moduleURL := module.ModelURL
		//设置的url和请求的path一样直接通过，如果是带参数或*需要额外处理
		if moduleURL == URL.Path {
			return true, nil
		} else if strings.Contains(moduleURL, URL.Path) {
			matchedURL = append(matchedURL, moduleURL)
		} else if strings.Contains(moduleURL, ".*") {
			//如果是以.*结尾的，将modelURL才分成两部分，前半部分能匹配上当前的url就可以
			urlSplit := strings.Split(moduleURL, ",")
			if strings.Contains(URL.String(), urlSplit[0]) {
				return true, nil
			}
		}
	}

	if len(matchedURL) == 0 {
		return false, errors.New("无模块访问权限")
	}
	for _, singleURL := range matchedURL {
		//这里需要区分url中有没有参数，没有参数就直接过，有参数就再验证参数
		parseString, _ := url2.ParseString(singleURL)
		queries := parseString.Query()
		for name, _ := range queries {
			if queries.Get(name) != URL.Query().Get(name) {
				return false, errors.New("权限无匹配")
			}
		}
	}
	return true, nil
}

func splitStrToInt64(str, sep string) []int64 {
	splitSlice := strings.Split(str, sep)
	var res []int64
	for _, v := range splitSlice {
		res = append(res, utString.ConvertInt64(v))
	}
	return res
}

func uniqueToInt64(str, sep string) []int64 {
	var res []int64
	splitSlice := splitStrToInt64(str, sep)
	splitMap := make(map[int64]bool, 0)
	for _, v := range splitSlice {
		if v == 0 {
			continue
		}
		if _, ok := splitMap[v]; ok {
			continue
		}
		splitMap[v] = true
		res = append(res, v)
	}
	return res
}