package model

import (
	"fmt"
	"git.icechen.cn/monorepo/backend/app/brahma/api/murder/internal/error_process"
	"github.com/pkg/errors"
	"strings"
)

const (
	jsonArray = "jsonArr"
	normal    = "normal"
)

type (
	//区分query中不同规则
	ruleType struct {
		rule  string
		value string
	}
	QueryMap map[string]ruleType
)

type GetSqlMapFromQuery interface {
	// ProcessMap 生成queryMap
	ProcessMap() (QueryMap, error)
}

type GetQuery struct {
	Query string
}

type ScriptsDto struct {
	ScriptName            string  `json:"script_name" gorm:"column:script_name"`
	ScriptIntro           string  `json:"script_intro" gorm:"column:script_intro"`
	ScriptTag             strs    `json:"script_tag" gorm:"column:script_tag"`
	ScriptScore           float64 `json:"script_score" gorm:"column:script_score"`
	GroupDuration         int     `json:"group_duration" gorm:"column:group_duration"`
	ScriptCoverUrl        string  `json:"script_cover_url" gorm:"column:script_cover_url"`
	ScriptTextContext     string  `json:"script_text_context" gorm:"column:script_text_context"`
	ScriptPlotScore       float64 `json:"script_plot_score" gorm:"column:script_plot_score"`
	ScriptImageContent    strs    `json:"script_image_content" gorm:"column:script_image_content"`
	ScriptMalePlayer      int     `json:"script_male_player" gorm:"column:script_male_player"`
	ScriptFemalePlayer    int     `json:"script_female_player" gorm:"column:script_female_player"`
	ScriptDifficultDegree string  `json:"script_difficult_degree" gorm:"column:script_difficult_degree"`
	ScriptPlayerLimit     int     `json:"script_player_limit" gorm:"column:script_player_limit"`
	Uuid                  string  `json:"uuid" gorm:"column:uuid" valid:"no_empty"`
	ScriptComplexScore    float64 `json:"script_complex_score" gorm:"column:script_complex_score"`
}

//检查语法
func checkGrammar(value string) bool {
	//如果 = 左右两侧 不是完整的key、value返回错误
	var pairs []string
	if pairs = strings.Split(value, "="); len(pairs) != 2 {
		return false
	}
	//如果 value 没有完整闭合括号则返回错误
	bytes := []byte(pairs[1])
	if (bytes[0] == '(' && bytes[len(bytes)-1] != ')') || (bytes[len(bytes)-1] == ')' && bytes[0] != '(') {
		return false
	}
	return true
}

//处理json数组
func processJsonArr(pair []string) (string, bool) {
	value := fmt.Sprintf("JSON_CONTAINS(%v,JSON_ARRAY(", pair[0])
	//处理括号，遍历元素
	arrs := strings.Split(string([]byte(pair[1])[1:len([]byte(pair[1]))-1]), "|")
	for _, v := range arrs {
		//如果大括号里面没有元素
		if v == "" {
			return "", false
		}
		value = fmt.Sprintf("%v%v,", value, v)
	}
	s := []byte(value)
	value = string(s[0:len(s)-1]) + "))"
	return value, true

}

// ProcessMap 生成查询map
func (g GetQuery) ProcessMap() (QueryMap, error) {
	m := make(QueryMap)
	//寻找没有软删掉的数据
	m["is_del"] = ruleType{rule: normal, value: `0`}
	//不满足最小查询条件直接返回
	if len([]byte(g.Query)) < 5 {
		return m, nil
	}
	//括号不匹配直接返回
	if bytes := []byte(g.Query); bytes[0] != '(' || bytes[len(bytes)-1] != ')' {
		return nil, errors.New(error_process.GrammerError)
	}
	//处理query字符串、掐头去尾
	g.Query = string([]byte(g.Query)[1 : len([]byte(g.Query))-1])
	//遍历处理过的字符串，根据query规则生成queryMap
	for _, v := range strings.Split(g.Query, ",") {
		if !checkGrammar(v) {
			return nil, errors.New(error_process.GrammerError)
		}
		pairs := strings.Split(v, "=")
		bytes := []byte(pairs[1])
		//是否是json数组
		if bytes[0] == '(' && bytes[len(bytes)-1] == ')' {
			if value, usable := processJsonArr(pairs); usable {
				m[pairs[0]] = ruleType{
					rule:  jsonArray,
					value: value,
				}
				continue
			}
			return nil, errors.New(error_process.GrammerError)
		}
		//普通字段
		m[pairs[0]] = ruleType{
			rule:  normal,
			value: pairs[1],
		}
	}
	return m, nil
}