package main

import (
	"database/sql"
	"log"
	"math"
	"net/http"
	"net/url"
	"strconv"
	"time"

	"github.com/go-sql-driver/mysql"
)

type RpnOut struct {
	Version      string
	Sign_type    string
	Mid          string
	Notify_url   string
	Order_amount string
	Order_time   string //YYYYMMDDHHMMSS
	Order_id     string
	User_id      string
	User_name    string
	User_cardno  string
	Signature    string
	//template
	Url string //where to post entire data structure
	//database specific
	Id          int64
	Leanwork    int64
	Ip4         uint32
	Ip4location sql.NullString
	Ts          mysql.NullTime
}

func (m *RpnOut) buildReqByLeanworkINP2P(row LeanworkIn, user_name string, user_cardno string) RpnOut {

	m.Version = "1.1"
	m.Sign_type = "MD5"
	m.Mid = Config.Rpn.MIDP2P
	m.Notify_url = Config.Rpn.UrlCallBack
	m.Order_id = row.OrderNo
	m.Order_amount = m.translateAmountFromLeanwork(row.OrderAmount)
	m.Order_time = m.now()
	m.User_id = row.CustomerId
	m.User_name = user_name
	m.User_cardno = user_cardno
	m.Signature = md5RpnFormP2P(*m)
	m.Leanwork = row.Id

	return *m
}

func (m *RpnOut) buildReqByLeanworkINFAT(row LeanworkIn, user_name string, user_cardno string) RpnOut {
	m.Version = "1.1"
	m.Sign_type = "MD5"
	m.Mid = Config.Rpn.MIDFAT
	m.Notify_url = Config.Rpn.UrlCallBack
	m.Order_id = row.OrderNo
	m.Order_amount = m.translateAmountFromLeanwork(row.OrderAmount)
	m.Order_time = m.now()
	m.User_id = row.CustomerId
	m.User_name = user_name
	m.User_cardno = user_cardno
	m.Signature = md5RpnFormFAT(*m)
	m.Leanwork = row.Id
	return *m
}

//from 0.1 to 10 cents
func (m *RpnOut) translateAmountFromLeanwork(from string) string {
	f, _ := strconv.ParseFloat(from, 32)
	f = f * 100 //convert to cents
	t := int(math.Ceil(f))
	s := strconv.Itoa(t)
	return s
}

func (m *RpnOut) now() string {
	t := time.Now()
	return t.Format("20060102150405")
}

//encode without disturbing it's original order
func (m *RpnOut) encode() string {
	s := "version=" + m.Version
	s += "&sign_type=" + m.Sign_type
	s += "&mid=" + m.Mid
	s += "&notify_url=" + url.QueryEscape(m.Notify_url)
	s += "&order_id=" + m.Order_id
	s += "&order_amount=" + m.Order_amount
	s += "&order_time=" + m.Order_time
	s += "&user_id=" + m.User_id
	s += "&user_name=" + url.QueryEscape(m.User_name)
	s += "&user_cardno=" + m.User_cardno
	s += "&signature=" + m.Signature
	return s
}

func (m *RpnOut) sendRedirect(w http.ResponseWriter, row LeanworkIn) {
	//execute redirect
	m.Url = Config.Rpn.Url
	tmpl.ExecuteTemplate(w, "rpnCallOutRedirect", *m)
}

func (m *RpnOut) getMD5Key() string {
	if m.Mid == Config.Rpn.MIDP2P {
		return Config.Rpn.MD5P2P
	} else if m.Mid == Config.Rpn.MIDFAT {
		return Config.Rpn.MD5FAT
	} else {
		log.Println("WARNING: rpnOut::getMD5Key()  has bad Mid = " + m.Mid + " cannot determin P2P or FAT, MID not match config")
		return ""
	}
}

func getRpnOutByOrderId(order_id string) (ret RpnOut, err error) {
	if err = db.conn(Config); err != nil {
		return
	}
	defer db.close()

	q := "SELECT * FROM rpnOut WHERE order_id = ? ORDER BY id DESC LIMIT 1"
	err = db.h.QueryRow(q, order_id).Scan(
		&ret.Id, &ret.Leanwork, &ret.Version,
		&ret.Sign_type, &ret.Mid, &ret.Notify_url,
		&ret.Order_amount, &ret.Order_time, &ret.Order_id,
		&ret.User_id, &ret.User_name, &ret.User_cardno, &ret.Signature,
		&ret.Ip4, &ret.Ip4location, &ret.Ts)
	if err != nil {
		if err == sql.ErrNoRows {
			log.Println("trying to retrieve rpnOut(order_id=" + order_id + ") but not found")
		} else {
			log.Println("Error retrieving rpnOut(order_id=" + order_id + ") encountered : " + err.Error())
		}
	}
	return
}