package importer

import (
	"encoding/json"
	"fmt"
	"strings"
	"sync"
	"sync/atomic"
	"time"

	"git.wecise.com/wecise/cgimport/odbc"
	"git.wecise.com/wecise/odb-go/odb"
	"git.wecise.com/wecise/util/cast"
	"git.wecise.com/wecise/util/cmap"
	"git.wecise.com/wecise/util/merrs"
)

type classdatainfo struct {
	*classinfo
	insertcount   int64
	lastlogtime   time.Time
	lastlogicount int64
	mutex         sync.Mutex
}

var classdatainfos = cmap.New[string, *classdatainfo]()

type ODBCImporter struct {
	client odb.Client
}

func NewODBCImporter() *ODBCImporter {
	odbci := &ODBCImporter{}
	if odbc.DevPhase&(odbc.DP_CREATECLASS|odbc.DP_INSERTDATA) != 0 {
		odbci.client = odbc.ODBC()
	}
	return odbci
}

// 根据数据修正类定义
func (odbci *ODBCImporter) ReviseClassStruct() (err error) {
	for _, classname := range classnames {
		ci := classinfos.GetIFPresent(classname)
		if ci == nil {
			return merrs.NewError("classinfo not found " + classname)
		}
		_, err = classdatainfos.GetWithNew(classname, func() (cdi *classdatainfo, err error) {
			logger.Info("create class " + ci.classname)
			if odbci.client != nil {
				_, err = odbci.client.Query(ci.createmql).Do()
				if err != nil {
					return
				}
			}
			cdi = &classdatainfo{classinfo: ci}
			return
		})
	}
	if odbci.client != nil {
		for _, createedgemql := range createedgemqls {
			_, e := odbci.client.Query(createedgemql).Do()
			if e != nil && !strings.Contains(e.Error(), "already exist") {
				err = e
				return
			}
		}
	}
	return
}

func (odbci *ODBCImporter) InsertEdge(data map[string]any) (err error) {

	return
}

// 插入数据
func (odbci *ODBCImporter) InsertData(classname string, data map[string]any) (err error) {
	cdi := classdatainfos.GetIFPresent(classname)
	if cdi == nil {
		return merrs.NewError("class not defined " + classname)
	}
	if cdi.insertmql == "" {
		return merrs.NewError("class no fields to insert " + classname)
	}
	values := []any{}
	for _, fn := range cdi.fieldslist {
		fi := cdi.fieldinfos[fn]
		if fi.datakey == "" {
			td := map[string]any{}
			for k, v := range data {
				if cdi.datakey_fieldinfos[k] == nil {
					td[k] = v
				}
			}
			tdbs, e := json.Marshal(td)
			if e != nil {
				return merrs.NewError(e)
			}
			values = append(values, string(tdbs))
			continue
		}
		v := data[fi.datakey]
		switch fi.fieldtype {
		case "set<varchar>":
			v = cast.ToStringSlice(v)
		case "timestamp":
			tv, e := cast.ToDateTimeE(v, "2006-01-02-15.04.05.000000")
			if e != nil {
				return merrs.NewError(fmt.Sprint("can't parse datetime value '", v, "'"))
			}
			v = tv.Format("2006-01-02 15:04:05.000000")
		}
		values = append(values, v)
	}
	if odbci.client != nil {
		_, err = odbci.client.Query(cdi.insertmql, values...).Do()
		if err != nil {
			err = merrs.NewError(err, merrs.SSMaps{{"mql": cdi.insertmql}, {"values": fmt.Sprint(values)}})
			logger.Error(err)
			return
		}
	}
	atomic.AddInt64(&cdi.insertcount, 1)
	cdi.mutex.Lock()
	if time.Since(cdi.lastlogtime) > 5*time.Second && cdi.lastlogicount != cdi.insertcount {
		cdi.lastlogtime = time.Now()
		cdi.lastlogicount = cdi.insertcount
		logger.Info("class", cdi.classname, "import", cdi.insertcount, "records")
	}
	cdi.mutex.Unlock()
	return
}

func (odbci *ODBCImporter) done() {
	classdatainfos.Fetch(func(cn string, cdi *classdatainfo) bool {
		cdi.mutex.Lock()
		if cdi.lastlogicount != cdi.insertcount {
			cdi.lastlogtime = time.Now()
			cdi.lastlogicount = cdi.insertcount
			logger.Info("class", cdi.classname, "import", cdi.insertcount, "records")
		}
		cdi.mutex.Unlock()
		return true
	})
}

func (odbci *ODBCImporter) alldone() {
	classdatainfos.Fetch(func(cn string, cdi *classdatainfo) bool {
		cdi.mutex.Lock()
		if cdi.insertcount != 0 {
			cdi.lastlogtime = time.Now()
			cdi.lastlogicount = cdi.insertcount
			logger.Info("class", cdi.classname, "import", cdi.insertcount, "records")
		}
		cdi.mutex.Unlock()
		return true
	})
}

func (odbci *ODBCImporter) reload() error {
	if odbci.client != nil {
		for i := len(classnames) - 1; i >= 0; i-- {
			classname := classnames[i]
			ci := classinfos.GetIFPresent(classname)
			if ci == nil {
				continue
			}
			for retry := 2; retry >= 0; retry-- {
				_, e := odbci.client.Query(`delete from "` + ci.classfullname + `" with version`).Do()
				_ = e
				_, e = odbci.client.Query(`drop class if exists "` + ci.classfullname + `"`).Do()
				if e != nil {
					if retry > 0 {
						continue
					}
					return e
				}
			}
		}
	}
	return nil
}