package web

import (
	"encoding/json"
	"net/http"

	"github.com/astaxie/session"
	"github.com/jinzhu/gorm"
	"github.com/julienschmidt/httprouter"

	libconfig "dev.sum7.de/sum7/warehost/config"
	libapi "dev.sum7.de/sum7/warehost/lib/api"
	log "dev.sum7.de/sum7/warehost/lib/log"
	libsystem "dev.sum7.de/sum7/warehost/system"
)

//MODULNAME to get global name for the modul
const MODULNAME = "web"

//API keep data in module global
type API struct {
	config       *libconfig.Config
	sessions     *session.Manager
	dbconnection *gorm.DB
	log          *log.ModulLog
}

// NewAPI sets the routes to the api functions
func NewAPI(config *libconfig.Config, sessions *session.Manager, dbconnection *gorm.DB, router *httprouter.Router, prefix string) {
	api := &API{
		config:       config,
		sessions:     sessions,
		dbconnection: dbconnection,
		log:          log.NewModulLog(MODULNAME),
	}
	router.GET(prefix+"/involve", libsystem.LoginHandler(api.Involve, sessions))
	router.POST(prefix+"/website", libsystem.LoginHandler(api.WebsiteAdd, sessions))
	router.PUT(prefix+"/website/:websiteid", InvolveWebsiteHandler(api.WebsiteEdit, sessions, dbconnection))
	router.DELETE(prefix+"/website/:websiteid", InvolveWebsiteHandler(api.WebsiteDelete, sessions, dbconnection))
	router.GET(prefix+"/website/:websiteid/permission", InvolveWebsiteHandler(api.PermissionList, sessions, dbconnection))
	router.POST(prefix+"/website/:websiteid/permission/:loginid", InvolveWebsiteHandler(api.PermissionAdd, sessions, dbconnection))
	router.DELETE(prefix+"/website/:websiteid/permission/:loginid", InvolveWebsiteHandler(api.PermissionDelete, sessions, dbconnection))
	router.GET(prefix+"/website/:websiteid/domain", InvolveWebsiteHandler(api.DomainList, sessions, dbconnection))
	router.POST(prefix+"/website/:websiteid/domain/:domain", InvolveWebsiteHandler(api.DomainAdd, sessions, dbconnection))
	router.DELETE(prefix+"/website/:websiteid/domain/:domain", InvolveWebsiteHandler(api.DomainDelete, sessions, dbconnection))
	router.GET(prefix+"/website/:websiteid/menu", InvolveWebsiteHandler(api.MenuTree, sessions, dbconnection))
	router.POST(prefix+"/website/:websiteid/menu", InvolveWebsiteHandler(api.MenuAdd, sessions, dbconnection))
	router.PUT(prefix+"/website/:websiteid/menu/:menuid", InvolveWebsiteHandler(api.MenuEdit, sessions, dbconnection))
	router.DELETE(prefix+"/website/:websiteid/menu/:menuid", InvolveWebsiteHandler(api.MenuDelete, sessions, dbconnection))
}

// Involve to get Website where loggend in user has privilegs
func (api *API) Involve(w http.ResponseWriter, r *http.Request, _ httprouter.Params, sess session.Session, login *libsystem.Login) (returndata interface{}, returnerr *libapi.ErrorResult) {
	returndata = false
	logger := api.log.GetLog(r, "involve")
	var involved []*Manager
	api.dbconnection.Where("login = ?", login.ID).Preload("Website").Find(&involved)
	logger.Info("done")
	returndata = involved
	return
}

// WebsiteAdd to add a new website
func (api *API) WebsiteAdd(w http.ResponseWriter, r *http.Request, _ httprouter.Params, sess session.Session, login *libsystem.Login) (returndata interface{}, returnerr *libapi.ErrorResult) {
	returndata = false
	logger := api.log.GetLog(r, "websiteadd")
	tx := api.dbconnection.Begin()
	var websiteRequest Website
	err := json.NewDecoder(r.Body).Decode(&websiteRequest)
	if err != nil {
		tx.Rollback()
		logger.Error("fetch request")
		http.Error(w, err.Error(), http.StatusInternalServerError)
		returnerr = &libapi.ErrorResult{Message: "Internal Request Error"}
		return
	}
	website := &Website{Name: websiteRequest.Name}
	if err := tx.Create(website).Error; err != nil {
		tx.Rollback()
		logger.Error("error during Website")
		returnerr = &libapi.ErrorResult{Message: "Internal Database Error"}
		return
	}

	if err := tx.Create(&Manager{LoginID: login.ID, WebsiteID: website.ID}).Error; err != nil {
		tx.Rollback()
		logger.Error("error during Manager")
		returnerr = &libapi.ErrorResult{Message: "Internal Database Error"}
		return
	}

	tx.Commit()
	returndata = true
	logger.Info("done")
	return
}

// WebsiteEdit to edit website
func (api *API) WebsiteEdit(w http.ResponseWriter, r *http.Request, _ httprouter.Params, sess session.Session, login *libsystem.Login, websiteid int64) (returndata interface{}, returnerr *libapi.ErrorResult) {
	returndata = false
	logger := api.log.GetLog(r, "websiteedit")
	var websiteRequest Website
	err := json.NewDecoder(r.Body).Decode(&websiteRequest)
	if err != nil {
		logger.Error("fetch request")
		http.Error(w, err.Error(), http.StatusInternalServerError)
		returnerr = &libapi.ErrorResult{Message: "Internal Request Error"}
		return
	}
	websiteRequest.ID = websiteid
	if err := api.dbconnection.Save(websiteRequest).Error; err != nil {
		logger.Error("Database: during edit Website")
		returnerr = &libapi.ErrorResult{Message: "Internal Database Error"}
		return
	}
	returndata = true
	logger.Info("done")
	return
}

// WebsiteDelete to delete website
func (api *API) WebsiteDelete(w http.ResponseWriter, r *http.Request, _ httprouter.Params, sess session.Session, login *libsystem.Login, websiteid int64) (returndata interface{}, returnerr *libapi.ErrorResult) {
	returndata = false
	logger := api.log.GetLog(r, "websitedelete")
	website := &Website{
		ID: websiteid,
	}
	if err := api.dbconnection.Unscoped().Delete(website).Error; err != nil {
		logger.Error("database: during delete website")
		returnerr = &libapi.ErrorResult{Message: "Internal Database Error"}
		return
	}
	returndata = true
	logger.Info("done")
	return
}