package main

import (
	"biukop.com/sfm/loan"
	"database/sql"
	"encoding/json"
	log "github.com/sirupsen/logrus"
	"net/http"
	"time"
)

type loginForm struct {
	Login string `json:"u"`
	Pass  string `json:"p"`
}

func apiV1Login(w http.ResponseWriter, r *http.Request, ss *loan.Session) {
	res := apiV1ResponseBlank()

	l := loginForm{}
	e := l.getFromClient(r)
	if e != nil {
		log.Warn("Failed login - cannot analyze request " + e.Error())
		res.add("login", false)
		res.add("reason", "incomplete request")
		res.sendJson(w)
		return
	}

	//try login
	_, e = ss.Login(l.Login, l.Pass)
	if e == sql.ErrNoRows { //not found
		log.Warnf("Failed login - user not found %+v, error=%s", l, e.Error())
		res.add("login", false)
		res.add("reason", "User not found")
		res.sendJson(w)
		return
	} else if e != nil {
		log.Warn("Failed login - cannot init session " + e.Error())
		res.add("login", false)
		res.add("reason", "either user name or password is not right")
		res.sendJson(w)
		return
	} else {
		//Audit user login, in db
		log.Info("successful login ", l.Login)
	}

	//format response
	res.add("login", true)
	res.add("Biukop-Session", ss.Id)
	res.add("Biukop-Mid", ss.Get("Biukop-Mid"))
	res.add("sessionExpire", ss.ExpireStr())
	res.add("sessionExpireHuman", ss.Expire.Format(time.RFC1123Z))
	if config.Debug {
		u, e := ss.GetUser()
		if e == nil {
			res.Env.Body["debug_session_user"] = u
			res.Env.Session = *ss
		} else {
			log.Warn("cannot read user for session ", ss)
			res.Env.Body["debug_session_user_error"] = e.Error()
		}
	}

	//send out
	apiV1AddTrackingCookie(w, r, ss) //always the last one to set cookies
	res.sendJson(w)
}

func (m *loginForm) getFromClient(r *http.Request) (e error) {

	e = apiV1DecodeRequestBody(m, r)
	if e != nil {
		log.Error(e)
		return
	}
	return
}

func apiV1DecodeRequestBody(bb interface{}, r *http.Request) (e error) {
	decoder := json.NewDecoder(r.Body)
	decoder.DisallowUnknownFields()
	e = decoder.Decode(bb)
	return
}