package admin

import (
	"gitlab.ingenieurbuero-peetz.de/tpeetz/kalorienmanager.git/pkg/auth"
	"gitlab.ingenieurbuero-peetz.de/tpeetz/kalorienmanager.git/pkg/dao"
	"gitlab.ingenieurbuero-peetz.de/tpeetz/kalorienmanager.git/pkg/properties"
	"gitlab.ingenieurbuero-peetz.de/tpeetz/kalorienmanager.git/pkg/util"
	"net/http"
	"strconv"

	"fmt"
	"github.com/gin-gonic/gin"
)

var (
	// PageTitleUserAdministration defines the page title for user administration
	PageTitleUserAdministration = fmt.Sprintf("%s User Administration", properties.Application)
)

// ShowLoginPage renders login page.
func ShowLoginPage(c *gin.Context) {
	// Call the render function with the name of the template to render
	util.Render(c, gin.H{"title": "Login"}, "login.html", false)
}

// PerformLogin reads data from login form and validates input.
func PerformLogin(c *gin.Context) {
	// Obtain the POSTed username and password values
	username := c.PostForm("username")
	password := c.PostForm("password")

	var userDao = UserDAO{Db: dao.KalorienmanagerDb}

	// Check if the username/password combination is valid
	if userDao.IsUserValid(username, password) {
		sessionInterface, _ := c.Get("session")
		sessionID := sessionInterface.(string)
		user, _ := userDao.FindByUsername(username)
		sessionDao := auth.SessionDAO{Db: dao.KalorienmanagerDb}
		session, _ := sessionDao.FindByID(sessionID)
		session.Username = username
		session.IsAdmin = user.IsAdmin
		sessionDao.Update(session)
		util.Render(c, gin.H{"title": "Successful Login", "InfoMessage": "Login successfull"}, "index.html", true)
	} else {
		// If the username/password combination is invalid,
		// show the error message on the login page
		c.HTML(http.StatusBadRequest, "login.html", gin.H{
			"ErrorTitle":   "Login Failed",
			"ErrorMessage": "Invalid credentials provided"})
	}
}

// Logout invalidates session.
func Logout(c *gin.Context) {
	sessionInterface, _ := c.Get("session")
	sessionID := sessionInterface.(string)
	c.SetCookie("session", sessionID, -1, "", "", false, true)

	// Redirect to the home page
	c.Redirect(http.StatusTemporaryRedirect, "/")
}

func showAdminIndex(c *gin.Context) {
	// Call the render function with the name of the template to render
	util.Render(c, gin.H{"title": properties.Application, "payload": nil}, "admin.html", true)
}

func showUserIndex(c *gin.Context) {
	var dao = UserDAO{Db: dao.KalorienmanagerDb}
	if users, err := dao.FindAll(); err == nil && users != nil {
		util.Render(c, gin.H{"title": PageTitleUserAdministration, "payload": users}, "users.html", true)
	} else {
		util.Render(c, gin.H{"title": PageTitleUserAdministration, "payload": users, "ErrorMessage": err}, "users.html", true)
	}
}

func showUserDetails(c *gin.Context) {
	userID := c.Param("userid")
	var userDao = UserDAO{Db: dao.KalorienmanagerDb}
	if user, err := userDao.FindByID(userID); err == nil && &user != nil {
		util.Render(c, gin.H{"title": PageTitleUserAdministration, "payload": user, "action": util.SaveAction}, "user-detail.html", true)
	} else {
		c.AbortWithError(http.StatusNotFound, err)
	}
}

func showUserCreation(c *gin.Context) {
	var user = User{}
	util.Render(c, gin.H{"title": PageTitleUserAdministration, "payload": user, "action": util.AddAction}, "user-detail.html", true)
}

func validateUserCreation(c *gin.Context) {
	// Obtain the POSTed username and password values
	username := c.PostForm("username")
	firstname := c.PostForm("firstname")
	lastname := c.PostForm("lastname")
	password := c.PostForm("password")
	adminFormVar := c.PostForm("admin")
	action := c.PostForm("action")
	userid := c.PostForm("userid")
	isAdmin, _ := strconv.ParseBool(adminFormVar)

	var err error
	var dao = UserDAO{Db: dao.KalorienmanagerDb}
	var user = User{}

	switch action {
	case util.AddAction:
		user.Username = username
		user.Firstname = firstname
		user.Lastname = lastname
		user.IsAdmin = isAdmin
		user.Password, _ = HashPassword(password)
		_, err = dao.Upsert(user)
	case util.SaveAction:
		user, _ = dao.FindByID(userid)
		user.Username = username
		user.Firstname = firstname
		user.Lastname = lastname
		user.IsAdmin = isAdmin
		user.Password, _ = HashPassword(password)
		err = dao.Update(user)
	case util.DeleteAction:
		user, _ = dao.FindByID(userid)
		err = dao.Delete(user)
	}
	if err == nil {
		c.Redirect(http.StatusTemporaryRedirect, "/admin/user")
	} else {
		c.HTML(http.StatusBadRequest, "kalorienmanager/create-user.html", gin.H{
			"ErrorTitle":   "User Creation Failed",
			"ErrorMessage": err.Error()})
	}
}