package hhc_ast

import (
	"git.swzry.com/zry/go-hhc-cli/hhc_common"
	"github.com/derekparker/trie"
)

type SDT_TrieContainer struct {
	TrieTree *trie.Trie
	DataMap  map[string]*SDTNode_Command
}

func NewSDT_TrieContainer() *SDT_TrieContainer {
	return &SDT_TrieContainer{
		TrieTree: trie.New(),
		DataMap:  make(map[string]*SDTNode_Command),
	}
}

func (c *SDT_TrieContainer) Put(cmd *SDTNode_Command) {
	k := cmd.Name
	c.TrieTree.Add(k, nil)
	c.DataMap[k] = cmd
}

func (c *SDT_TrieContainer) ExactGet(key string) (*SDTNode_Command, bool) {
	v, ok := c.DataMap[key]
	return v, ok
}

func (c *SDT_TrieContainer) PrefixGetList(prefix string) []*SDTNode_Command {
	lst := make([]*SDTNode_Command, 0)
	kl := c.TrieTree.PrefixSearch(prefix)
	for _, v := range kl {
		ov, ok := c.DataMap[v]
		if ok {
			lst = append(lst, ov)
		}
	}
	return lst
}

func (c *SDT_TrieContainer) PrefixGetOne(prefix string) (*SDTNode_Command, bool, bool) {
	kl := c.TrieTree.PrefixSearch(prefix)
	if len(kl) == 0 {
		return nil, false, false
	}
	if len(kl) > 1 {
		return nil, true, false
	}
	v, ok := c.DataMap[kl[0]]
	if ok {
		return v, true, true
	}
	return nil, false, true
}

func (c *SDT_TrieContainer) WalkUtil(token string) (*SDTNode_Command, hhc_common.SDTWalkError) {
	v, okx := c.DataMap[token]
	if okx {
		return v, nil
	}
	v, ok1, ok2 := c.PrefixGetOne(token)
	if ok1 {
		if ok2 {
			if v != nil {
				return v, nil
			} else {
				return nil, hhc_common.SDTWalkError_NullPointerException{RelyToken: token, RelyEntity: "Commands"}
			}
		} else {
			return nil, hhc_common.SDTWalkError_TooShortPrefix{}
		}
	} else {
		return nil, nil
	}
}