// Copyright 2017 The Xorm Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package xorm

import (
	"fmt"
	"strconv"
	"strings"
	"time"

	"xorm.io/xorm/internal/utils"
	"xorm.io/xorm/schemas"
)

func (session *Session) str2Time(col *schemas.Column, data string) (outTime time.Time, outErr error) {
	sdata := strings.TrimSpace(data)
	var x time.Time
	var err error

	var parseLoc = session.engine.DatabaseTZ
	if col.TimeZone != nil {
		parseLoc = col.TimeZone
	}

	if sdata == utils.ZeroTime0 || sdata == utils.ZeroTime1 {
	} else if !strings.ContainsAny(sdata, "- :") { // !nashtsai! has only found that mymysql driver is using this for time type column
		// time stamp
		sd, err := strconv.ParseInt(sdata, 10, 64)
		if err == nil {
			x = time.Unix(sd, 0)
		}
	} else if len(sdata) > 19 && strings.Contains(sdata, "-") {
		x, err = time.ParseInLocation(time.RFC3339Nano, sdata, parseLoc)
		session.engine.logger.Debugf("time(1) key[%v]: %+v | sdata: [%v]\n", col.Name, x, sdata)
		if err != nil {
			x, err = time.ParseInLocation("2006-01-02 15:04:05.999999999", sdata, parseLoc)
		}
		if err != nil {
			x, err = time.ParseInLocation("2006-01-02 15:04:05.9999999 Z07:00", sdata, parseLoc)
		}
	} else if len(sdata) == 19 && strings.Contains(sdata, "-") {
		x, err = time.ParseInLocation("2006-01-02 15:04:05", sdata, parseLoc)
	} else if len(sdata) == 10 && sdata[4] == '-' && sdata[7] == '-' {
		x, err = time.ParseInLocation("2006-01-02", sdata, parseLoc)
	} else if col.SQLType.Name == schemas.Time {
		if strings.Contains(sdata, " ") {
			ssd := strings.Split(sdata, " ")
			sdata = ssd[1]
		}

		sdata = strings.TrimSpace(sdata)
		if session.engine.dialect.URI().DBType == schemas.MYSQL && len(sdata) > 8 {
			sdata = sdata[len(sdata)-8:]
		}

		st := fmt.Sprintf("2006-01-02 %v", sdata)
		x, err = time.ParseInLocation("2006-01-02 15:04:05", st, parseLoc)
	} else {
		outErr = fmt.Errorf("unsupported time format %v", sdata)
		return
	}
	if err != nil {
		outErr = fmt.Errorf("unsupported time format %v: %v", sdata, err)
		return
	}
	outTime = x.In(session.engine.TZLocation)
	return
}