package controllers

import (
	"kontor-api-gin/pkg/globals"
	"kontor-api-gin/pkg/helpers"
	"kontor-api-gin/pkg/schema"
	"net/http"

	"github.com/gin-contrib/sessions"
	"github.com/gin-contrib/slog"

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

type LoginInput struct {
	Email    string `json:"email" binding:"required"`
	Password string `json:"password" binding:"required"`
}

func LoginHandler(c *gin.Context) {
	var input LoginInput

	if err := c.ShouldBindJSON(&input); err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
		return
	}

	profile := schema.Profile{}

	profile.Email = input.Email
	profile.Password = input.Password

	token, err := schema.LoginCheck(profile.Email, profile.Password)

	if err != nil {
		c.JSON(http.StatusBadRequest, gin.H{"error": "username or password is incorrect."})
		return
	}

	c.JSON(http.StatusOK, gin.H{"token": token})
}

func LoginGetHandler(c *gin.Context) {
	session := sessions.Default(c)
	user := session.Get(globals.UserKey)
	logger := slog.Get(c)
	logger.Info("LoginGetHandler", globals.UserKey, user)
	if user != nil {
		c.HTML(http.StatusBadRequest, "login", gin.H{
			"title":   "Kontor Gin",
			"version": "0.4.0",
			"login":   globals.LoginUrl,
			"message": "Please logout first",
			"user":    user,
		})
		return
	}
	c.HTML(http.StatusOK, "login", gin.H{
		"title":   "Kontor Gin",
		"version": "0.4.0",
		"login":   globals.LoginUrl,
		"message": "",
		"user":    user,
	})
}

func LoginPostHandler(c *gin.Context) {
	session := sessions.Default(c)
	user := session.Get(globals.UserKey)
	logger := slog.Get(c)
	logger.Info("LoginPostHandler", "user", user)
	if user != nil {
		c.HTML(http.StatusBadRequest, "login", gin.H{
			"title":   "Kontor Gin",
			"version": "0.4.0",
			"login":   globals.LoginUrl,
			"message": "Please logout first",
		})
		return
	}

	username := c.PostForm("username")
	password := c.PostForm("password")

	if helpers.EmptyUserPass(username, password) {
		c.HTML(http.StatusBadRequest, "login", gin.H{
			"title":   "Kontor Gin",
			"version": "0.4.0",
			"login":   globals.LoginUrl,
			"message": "Parameters can't be empty",
		})
	}

	if !helpers.CheckUserPass(username, password) {
		c.HTML(http.StatusUnauthorized, "login", gin.H{
			"title":   "Kontor Gin",
			"version": "0.4.0",
			"login":   globals.LoginUrl,
			"message": "Incorrect username or password",
		})
	}

	session.Set(globals.UserKey, username)
	if err := session.Save(); err != nil {
		c.HTML(http.StatusInternalServerError, "login", gin.H{
			"title":   "Kontor Gin",
			"version": "0.4.0",
			"login":   globals.LoginUrl,
			"message": "Failed to save session",
		})
		return
	}
	logger.Info("LoginGetHandler: redirect to index")

	c.Redirect(http.StatusMovedPermanently, "/")
}

func LogoutGetHandler(c *gin.Context) {
	session := sessions.Default(c)
	user := session.Get(globals.UserKey)
	logger := slog.Get(c)
	logger.Info("LogoutGetHandler", globals.UserKey, user)
	if user == nil {
		logger.Info("Invalid session token")
		return
	}
	session.Delete(globals.UserKey)
	if err := session.Save(); err != nil {
		logger.Info("Failed to save session", "error", err)
		return
	}
	logger.Info("LogoutGetHandler: redirect to index page")
	c.Redirect(http.StatusMovedPermanently, "/")
}