package importer

import (
	"strings"
	"sync"
	"sync/atomic"
	"time"

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

type fieldinfo struct {
	fieldname string
	fieldtype string
	keyidx    int    // 主键顺序值，0为非主键
	datakey   string // 对应数据中的键名
}

type classinfo struct {
	classname   string
	nickname    string
	fieldinfos  map[string]*fieldinfo
	keyfields   []string
	fieldslist  []string
	insertmql   string
	insertcount int64
	lastlogtime time.Time
	mutex       sync.Mutex
}

type ODBCImporter struct {
	client     odb.Client
	classinfos cmap.ConcurrentMap[string, *classinfo]
}

func NewODBCImporter() *ODBCImporter {
	return &ODBCImporter{
		client:     odbc.ODBC(),
		classinfos: cmap.New[string, *classinfo](),
	}
}

// 根据数据修正类定义
func (odbci *ODBCImporter) ReviseClassStruct(data map[string]any) (err error) {
	e := odbci.createClass("cgitest", "/cgitest", nil)
	if e != nil {
		return e
	}
	e = odbci.createClass("x10", "/cgitest/x10", []*fieldinfo{
		{fieldname: "uniqueid", datakey: "uniqueId", fieldtype: "varchar", keyidx: 1},
	})
	if e != nil {
		return e
	}
	e = odbci.createClass("x1001", "/cgitest/x10/x1001", []*fieldinfo{
		{fieldname: "uniqueid", datakey: "uniqueId", fieldtype: "varchar", keyidx: 1},
		{fieldname: "distname", datakey: "distName", fieldtype: "varchar"},
	})
	if e != nil {
		return e
	}
	e = odbci.createClass("x1002", "/cgitest/x10/x1002", []*fieldinfo{
		{fieldname: "uniqueid", datakey: "uniqueId", fieldtype: "varchar", keyidx: 1},
		{fieldname: "distname", datakey: "distName", fieldtype: "varchar"},
	})
	if e != nil {
		return e
	}
	return
}

// 插入数据
func (odbci *ODBCImporter) InsertData(classname string, data map[string]any) (err error) {
	if data["uniqueId"] == nil {
		// TODO 开发期只导入部分数据
		return
	}
	ci := odbci.classinfos.GetIFPresent(classname)
	if ci == nil {
		return merrs.NewError("class not defined " + classname)
	}
	if ci.insertmql == "" {
		return merrs.NewError("class no fields to insert " + classname)
	}
	values := []any{}
	for _, fn := range ci.fieldslist {
		fi := ci.fieldinfos[fn]
		v := data[fi.datakey]

		values = append(values, v)
	}
	_, err = odbci.client.Query(ci.insertmql, values...).Do()
	if err != nil {
		return
	}
	atomic.AddInt64(&ci.insertcount, 1)
	ci.mutex.Lock()
	if time.Since(ci.lastlogtime) > 5*time.Second {
		ci.lastlogtime = time.Now()
		logger.Info("class", ci.classname, "import", ci.insertcount, "records")
	}
	ci.mutex.Unlock()
	return
}

// 新建类
func (odbci *ODBCImporter) createClass(nickname, classname string, fieldinfoslist []*fieldinfo) (err error) {
	_, err = odbci.classinfos.GetWithNew(classname, func() (ci *classinfo, err error) {
		logger.Info("create class " + classname)
		fieldinfos := map[string]*fieldinfo{}
		fieldslist := []string{}
		keyfields := []string{}
		mql := `create class if not exists ` + classname + `(`
		if len(fieldinfoslist) > 0 {
			field_defines := []string{}
			for _, fi := range fieldinfoslist {
				field_defines = append(field_defines, fi.fieldname+" "+fi.fieldtype)
				fieldslist = append(fieldslist, fi.fieldname)
				if fi.keyidx > 0 {
					for len(keyfields) < fi.keyidx {
						keyfields = append(keyfields, "")
					}
					keyfields[fi.keyidx-1] = fi.fieldname
				}
				fieldinfos[fi.fieldname] = fi
			}
			mql += strings.Join(field_defines, ",")
		}
		if len(keyfields) > 0 {
			mql += ", keys(" + strings.Join(keyfields, ",") + ")"
		}
		mql += `)with namespace="cgitest" and key=manu and nickname='` + nickname + `'`
		_, err = odbci.client.Query(mql).Do()
		if err != nil {
			return
		}
		var insertmql string
		if len(fieldslist) > 0 {
			insertmql = `insert into ` + classname + "(" + strings.Join(fieldslist, ",") + ")values(" + strings.Repeat(",?", len(fieldslist))[1:] + ")"
		}
		ci = &classinfo{
			classname:  classname,
			nickname:   nickname,
			fieldinfos: fieldinfos,
			keyfields:  keyfields,
			fieldslist: fieldslist,
			insertmql:  insertmql,
		}
		return
	})
	return
}

// 修改类定义
func (odbci *ODBCImporter) alterClass() (err error) {
	return
}