package host

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

	"goji.io/pat"

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

func getMail(w http.ResponseWriter, r *http.Request) (mail Mail, returnerr *libapi.ErrorResult) {
	ctx := r.Context()
	login := ctx.Value("login").(*system.Login)
	profil := ctx.Value("profil").(*Profil)
	id, err := strconv.ParseInt(pat.Param(r, "mailid"), 10, 64)
	if err != nil {
		returnerr = &libapi.ErrorResult{
			Message: "Internal Request Error",
		}
		w.WriteHeader(http.StatusBadRequest)
		return
	}
	mail = Mail{}

	db := dbconnection.Where("ID = ?", id).Preload("Domain").Preload("Forwards").First(&mail)

	if db.Error != nil || db.RecordNotFound() {
		returnerr = &libapi.ErrorResult{Fields: []string{"mail"}, Message: "mail not found"}
		w.WriteHeader(http.StatusNotFound)
	}
	if !login.Superadmin {
		if mail.Domain.ProfilID != profil.ID {
			returnerr = &libapi.ErrorResult{Fields: []string{"profil"}, Message: "not allowed to get mail"}
			w.WriteHeader(http.StatusForbidden)
		}
	}

	return
}

func mailList(w http.ResponseWriter, r *http.Request) {
	logger := log.GetLog(r, "maillist")
	var mail []*Mail
	logger = setProfilLog(r, logger)

	domain, returnerr := getDomain(w, r)
	if returnerr != nil {
		logger.Info(returnerr.Message)
		libapi.JSONWrite(w, r, false, returnerr)
		return
	}
	logger = logger.WithField("dID", domain.ID)
	dbconnection.Where("domain = ?", domain.ID).Preload("Domain").Preload("Forwards").Find(&mail)
	logger.Info("done")
	libapi.JSONWrite(w, r, mail, nil)
	return
}

func mailAdd(w http.ResponseWriter, r *http.Request) {
	logger := log.GetLog(r, "mailadd")
	logger = setProfilLog(r, logger)

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

	domain, returnerr := getDomain(w, r)
	if returnerr != nil {
		logger.Info(returnerr.Message)
		libapi.JSONWrite(w, r, false, returnerr)
		return
	}
	logger = logger.WithField("dID", domain.ID)

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

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

func mailEdit(w http.ResponseWriter, r *http.Request) {
	logger := log.GetLog(r, "mailedit")
	logger = setProfilLog(r, logger)

	mail, returnerr := getMail(w, r)
	if returnerr != nil {
		logger.Info(returnerr.Message)
		libapi.JSONWrite(w, r, false, returnerr)
		return
	}
	logger = logger.WithField("mID", mail.ID)

	var mailRequest Mail
	returnerr = libapi.JSONDecoder(w, r, logger, &mailRequest)
	if returnerr != nil {
		libapi.JSONWrite(w, r, false, returnerr)
		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)
		libapi.JSONWrite(w, r, false, &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)
		libapi.JSONWrite(w, r, false, &libapi.ErrorResult{Message: "Internal Database Error with Database"})
		return
	}
	logger.Info("done")
	libapi.JSONWrite(w, r, true, nil)
}

func mailDelete(w http.ResponseWriter, r *http.Request) {
	logger := log.GetLog(r, "maildelete")
	logger = setProfilLog(r, logger)

	mail, returnerr := getMail(w, r)
	if returnerr != nil {
		logger.Info(returnerr.Message)
		libapi.JSONWrite(w, r, false, returnerr)
		return
	}
	logger = logger.WithField("mID", mail.ID)

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