package logic

import (
	"encoding/json"
	"fmt"
	"fusenapi/utils/auth"
	"fusenapi/utils/basic"
	"fusenapi/utils/check"
	"strings"

	"context"

	"fusenapi/server/info/internal/svc"
	"fusenapi/server/info/internal/types"

	"github.com/zeromicro/go-zero/core/logx"
	"gorm.io/gorm"
)

type InfoLogic struct {
	logx.Logger
	ctx    context.Context
	svcCtx *svc.ServiceContext
}

func NewInfoLogic(ctx context.Context, svcCtx *svc.ServiceContext) *InfoLogic {
	return &InfoLogic{
		Logger: logx.WithContext(ctx),
		ctx:    ctx,
		svcCtx: svcCtx,
	}
}

// 处理进入前逻辑w,r
// func (l *InfoLogic) BeforeLogic(w http.ResponseWriter, r *http.Request) {
// }

// 这个与表名强关联
var ModuleTable map[string]string = map[string]string{
	"userinfo": "fs_user_info",
	"material": "fs_user_material",
}

type ModuleQuery struct {
	TableName   string
	ModuleName  string
	Cond        string
	ModuleQuery map[string]struct{}
}

func (mquery *ModuleQuery) EncodeQuery(field string) string {

	var qstr []byte = []byte("JSON_OBJECT(")

	for query := range mquery.ModuleQuery {
		if query != "" {
			query = "." + query
		}
		qstr = append(qstr, []byte(fmt.Sprintf("'%s%s', JSON_EXTRACT(%s,'$%s'),", mquery.ModuleName, query, field, query))...)
	}
	if qstr[len(qstr)-1] == ',' {
		qstr[len(qstr)-1] = ')'
	} else {
		qstr = append(qstr, ')')
	}

	return string(qstr)
}

func (l *InfoLogic) Info(req *types.UserInfoRequest, userinfo *auth.UserInfo) (resp *basic.Response) {
	// 返回值必须调用Set重新返回, resp可以空指针调用 resp.SetStatus(basic.CodeOK, data)
	// userinfo 传入值时, 一定不为null

	var condUser string
	switch userinfo.GetIdType() {
	case auth.IDTYPE_User:
		condUser = fmt.Sprintf("user_id = %d", userinfo.UserId)
	case auth.IDTYPE_Guest:
		condUser = fmt.Sprintf("guest_id = %d", userinfo.GuestId)
	default:
		condUser = "user_id = 0 and guest_id = 0"
	}

	var mquerys map[string]*ModuleQuery = make(map[string]*ModuleQuery)
	var metadict map[string]any = make(map[string]any)

	for _, module := range req.Module {

		if !check.CheckModuleQuery(module) {
			return resp.SetStatusWithMessage(basic.CodeApiErr, fmt.Sprintf("%s format is error", module))
		}

		mlist := strings.Split(module, ".")
		if len(mlist) < 2 {
			return resp.SetStatusWithMessage(basic.CodeApiErr, fmt.Sprintf("%s format error", module))
		}

		mtable := mlist[0]
		tname, ok := ModuleTable[mtable]
		if !ok {
			return resp.SetStatusWithMessage(basic.CodeApiErr, fmt.Sprintf("%s format error, table %s not found", module, tname))
		}

		moduleName := mlist[1]
		cond := fmt.Sprintf("module = '%s' and %s", moduleName, condUser)

		if mquery, ok := mquerys[mtable]; ok {
			mquery.ModuleQuery[strings.Join(mlist[2:], ",")] = struct{}{}
		} else {
			mquery := &ModuleQuery{
				TableName:   tname,
				ModuleName:  mtable + "." + moduleName,
				Cond:        cond,
				ModuleQuery: map[string]struct{}{strings.Join(mlist[2:], ","): {}}}
			mquerys[mtable] = mquery
		}
	}

	for _, mquery := range mquerys {

		sqlstr := fmt.Sprintf("select id, module, %s as querydata from %s where %s order by ctime asc limit 1", mquery.EncodeQuery("metadata"), mquery.TableName, mquery.Cond)

		raw := l.svcCtx.MysqlConn.Raw(sqlstr)

		if raw.Error != nil {

			if raw.Error == gorm.ErrRecordNotFound {
				continue
			} else {
				logx.Error(raw.Error)
				return resp.SetStatusWithMessage(basic.CodeApiErr, raw.Error.Error())
			}
		}

		var info map[string]any = make(map[string]any)
		err := raw.Scan(&info).Error
		if err == gorm.ErrRecordNotFound {
			continue
		}

		if err != nil {
			logx.Error(err, mquery.EncodeQuery("metadata"))
			return resp.SetStatusWithMessage(basic.CodeApiErr, err.Error())
		}

		queryjson, ok := info["querydata"].(string)
		if !ok {
			return resp.SetStatusWithMessage(basic.CodeDbSqlErr, mquery.ModuleName)
		}

		var querydata map[string]any = make(map[string]any)
		err = json.Unmarshal([]byte(queryjson), &querydata)
		if err != nil {
			logx.Error(info)
			return resp.SetStatusWithMessage(basic.CodeApiErr, err.Error())
		}

		for k, v := range querydata {
			metadict[k] = v
		}
	}

	return resp.SetStatus(basic.CodeOK, metadict)
}

// 处理逻辑后 w,r 如:重定向, resp 必须重新处理
// func (l *InfoLogic) AfterLogic(w http.ResponseWriter, r *http.Request, resp *basic.Response) {
// // httpx.OkJsonCtx(r.Context(), w, resp)
// }