package web

type routesPath struct {
	method   string // get|post|put|delete
	desc     string
	permit   int
	handlers []HandlerFunc
}

type routesNode struct {
	path    string
	methods []*routesPath
	child   []*routesNode
}

func newRoutesNode(method, path string, desc string, permit int, handlers ...HandlerFunc) *routesNode {
	n := &routesNode{
		path: path,
	}
	n.addMethod(method, desc, permit, handlers)
	return n
}

func (n *routesNode) addChildren(method, path string, desc string, permit int, handlers ...HandlerFunc) *routesNode {
	for _, c := range n.child {
		if c.path == path {
			c.addMethod(method, desc, permit, handlers)
			return c
		}
	}

	children := newRoutesNode(method, path, desc, permit, handlers)
	n.child = append(n.child, children)
	return children
}

func (n *routesNode) addMethod(method string, desc string, permit int, handlers ...HandlerFunc) *routesNode {
	n.methods = append(n.methods, &routesPath{method: method, desc: desc, permit: permit, handlers: handlers})
	return n
}

func (n *routesNode) travel(parentPath string, parentDesc string, travelFun func(parentDesc string, path string, method string, handlers ...HandlerFunc)) {
	curPath := parentPath + n.path
	curNodeDesc := ""
	if len(n.methods) > 0 {
		for _, method := range n.methods {
			if method.method == "" {
				curNodeDesc = method.desc
				continue
			}
			travelFun(curPath, parentDesc, method.method, method.handlers)
		}
	}
	for _, c := range n.child {
		c.travel(curPath, curNodeDesc, travelFun)
	}
}