// Package model define model struct of model runtime service
package model

import (
	"context"
	"fmt"
	"strings"

	"modelRT/constants"
	"modelRT/diagram"

	"github.com/RediSearch/redisearch-go/redisearch"
	"github.com/redis/go-redis/v9"
)

// RedisSearch define func of redis search by input string
func RedisSearch(ctx context.Context, input string) ([]string, error) {
	var rdb redis.Client
	if input == "" {
		// 返回所有 grid 名
		return getAllGridKeys(ctx, constants.RedisAllGridSetKey)
	}

	// 处理 input 不为空但是不含有.的情况
	if strings.Contains(input, ".") == false {
		setKey := fmt.Sprintf(constants.RedisSpecGridZoneSetKey, input)
		return getSpecificZoneKeys(ctx, setKey)
	}

	// TODO 默认每次传递的带有.的前缀字符串一定正确
	if strings.HasSuffix(input, ".") {
		// TODO 首先判断.后是否为空字符串，为空则返回上次层级下的所有key
		// TODO 其次进行前缀匹配
		parentKey := strings.TrimSuffix(input, ".")
		// 直接查询预存的下一级内容
		results, err := rdb.ZRange(ctx, "autocomplete:"+parentKey, 0, -1).Result()
		fmt.Println(err)
		return results, nil
	}

	// TODO 处理前缀或模糊匹配
	// TODO 使用 RediSearch 的 FT.SUGGET 与Fuzzy标志进行前缀或模糊查询
	ac := redisearch.NewAutocompleter("localhost:6379", "my-autocomplete-dict")

	results, err := ac.SuggestOpts(input, redisearch.SuggestOptions{
		Num:          5,
		Fuzzy:        true,
		WithScores:   true,
		WithPayloads: true,
	})
	if err != nil {
		fmt.Println(err)
	}

	var terms []string
	for _, result := range results {
		terms = append(terms, result.Term)
	}
	// 返回结果
	return terms, nil
}

func getAllGridKeys(ctx context.Context, setKey string) ([]string, error) {
	// TODO 从redis set中获取所有的 grid key
	gridSets := diagram.NewRedisSet(ctx, setKey, 10, true)
	keys, err := gridSets.SMembers("grid_keys")
	if err != nil {
		return []string{}, fmt.Errorf("get all root keys failed, error: %v", err)
	}
	return keys, nil
}

func getSpecificZoneKeys(ctx context.Context, setKey string) ([]string, error) {
	// TODO 从redis set中获取所有的 grid key
	zoneSets := diagram.NewRedisSet(ctx, setKey, 10, true)
	keys, err := zoneSets.SMembers("grid_keys")
	if err != nil {
		return []string{}, fmt.Errorf("get all root keys failed, error: %v", err)
	}
	return keys, nil
}