package host

import (
	"net/http"
	"strconv"
	"strings"

	"goji.io/pat"
	"golang.org/x/net/context"

	libapi "dev.sum7.eu/sum7/warehost/lib/api"
	system "dev.sum7.eu/sum7/warehost/system"
)

func getMail(ctx context.Context, w http.ResponseWriter) (mail Mail, returnerr *libapi.ErrorResult) {
	login := ctx.Value("login").(*system.Login)
	profil := ctx.Value("profil").(*Profil)
	id, err := strconv.ParseInt(pat.Param(ctx, "mailid"), 10, 64)
	if err != nil {
		returnerr = &libapi.ErrorResult{
			Message: "Internal Request Error",
		}
		w.WriteHeader(http.StatusBadRequest)
		return
	}
	if login.Superadmin {
		dbconnection.Where("id = ?", id).Preload("Forwards").Find(&mail)
	} else {
		dbconnection.Where(map[string]int64{"ID": id, "domain.profil": profil.ID}).Preload("Forwards").Find(&mail)
	}
	if mail.ID <= 0 {
		returnerr = &libapi.ErrorResult{Fields: []string{"mail"}, Message: "not found"}
		w.WriteHeader(http.StatusNotFound)
	}
	return
}

func mailList(ctx context.Context, w http.ResponseWriter, r *http.Request) (returndata interface{}, returnerr *libapi.ErrorResult) {
	returndata = false
	logger := log.GetLog(r, "maillist")
	var mail []*Mail
	domain, returnerr := getDomain(ctx, w)
	if returnerr != nil {
		logger.Info("not found")
		return
	}
	dbconnection.Where("domain = ?", domain.ID).Preload("Domain").Preload("Forwards").Find(&mail)
	logger.Info("done")
	returndata = mail
	return
}

func mailAdd(ctx context.Context, w http.ResponseWriter, r *http.Request) (returndata interface{}, returnerr *libapi.ErrorResult) {
	returndata = false
	logger := log.GetLog(r, "mailadd")

	var mailRequest Mail
	returnerr = libapi.JSONDecoder(r.Body, &mailRequest, w, logger)
	if returnerr != nil {
		return
	}

	domain, returnerr := getDomain(ctx, w)
	if returnerr != nil {
		logger.Info("not found")
		return
	}

	mail := &Mail{
		DomainID: domain.ID,
		Name:     mailRequest.Name,
		Forwards: mailRequest.Forwards,
		LoginID:  mailRequest.LoginID,
	}

	if err := dbconnection.Create(mail).Error; err != nil {
		if strings.Contains(err.Error(), "duplicate key") {
			logger.Warning("exists already")
			return
		}
		logger.Error("database: during create host mail: ", err)
		w.WriteHeader(http.StatusInternalServerError)
		returnerr = &libapi.ErrorResult{Message: "Internal Database Error with Database"}
		return
	}
	returndata = true
	logger.Info("done")
	return
}

func mailEdit(ctx context.Context, w http.ResponseWriter, r *http.Request) (returndata interface{}, returnerr *libapi.ErrorResult) {
	returndata = false
	logger := log.GetLog(r, "mailedit")

	mail, returnerr := getMail(ctx, w)
	if returnerr != nil {
		logger.Info("not found")
		return
	}

	var mailRequest Mail
	returnerr = libapi.JSONDecoder(r.Body, &mailRequest, w, logger)
	if returnerr != nil {
		return
	}

	mail.Name = mailRequest.Name
	mail.LoginID = mailRequest.LoginID

	idsStay := map[int64]struct{}{}
	idsStay[0] = struct{}{}

	for _, item := range mailRequest.Forwards {
		if item.ID == 0 {
			mail.Forwards = append(mail.Forwards, item)
		} else {
			idsStay[item.ID] = struct{}{}
		}
	}

	idsDel := []int64{}
	for _, item := range mail.Forwards {
		if _, ok := idsStay[item.ID]; !ok {
			idsDel = append(idsDel, item.ID)
		}
	}

	if err := dbconnection.Unscoped().Delete(MailForward{}, "id in (?)", idsDel).Error; err != nil {
		logger.Error("database: during delete host mail forwards: ", err)
		w.WriteHeader(http.StatusInternalServerError)
		returnerr = &libapi.ErrorResult{Message: "Internal Database Error with Database"}
		return
	}
	if err := dbconnection.Save(mail).Error; err != nil {
		logger.Error("database: during modify host mail: ", err)
		w.WriteHeader(http.StatusInternalServerError)
		returnerr = &libapi.ErrorResult{Message: "Internal Database Error with Database"}
		return
	}
	returndata = true
	logger.Info("done")
	return
}

func mailDelete(ctx context.Context, w http.ResponseWriter, r *http.Request) (returndata interface{}, returnerr *libapi.ErrorResult) {
	returndata = false
	logger := log.GetLog(r, "maildelete")

	mailRequest, returnerr := getMail(ctx, w)
	if returnerr != nil {
		logger.Info("not found")
		return
	}

	if err := dbconnection.Unscoped().Delete(mailRequest).Error; err != nil {
		logger.Error("database: during create host mail: ", err)
		w.WriteHeader(http.StatusInternalServerError)
		returnerr = &libapi.ErrorResult{Message: "Internal Database Error with Database"}
		return
	}
	returndata = true
	logger.Info("done")
	return
}