// Copyright (c) 2026 Zeni Kim <zenik@smarteching.com>
// Use of this source code is governed by MIT-style
// license that can be found in the LICENSE file.

package controllers

import (
	"errors"
	"fmt"

	"net/http"
	"os"
	"strconv"

	"git.smarteching.com/goffee/core"
	"git.smarteching.com/goffee/core/template/components"
	"git.smarteching.com/goffee/cup/models"
	"gorm.io/gorm"
)

func AppSignin(c *core.Context) *core.Response {
	email := c.GetRequestParam("email")
	password := c.GetRequestParam("password")

	// check if template engine is enable
	TemplateEnableStr := os.Getenv("TEMPLATE_ENABLE")
	if TemplateEnableStr == "" {
		TemplateEnableStr = "false"
	}
	TemplateEnable, _ := strconv.ParseBool(TemplateEnableStr)

	// Apps web only works if template is enabled in environment
	if !TemplateEnable {
		return c.Response.Redirect("/applogin")
	}

	data := map[string]interface{}{
		"email":    email,
		"password": password,
	}
	rules := map[string]interface{}{
		"email":    "required|email",
		"password": "required",
	}
	v := c.GetValidator().Validate(data, rules)

	if v.Failed() {
		c.GetLogger().Error(v.GetErrorMessagesJson())
		return c.Response.Redirect("/applogin")
	}

	var user models.User
	res := c.GetGorm().Where("email = ?", c.CastToString(email)).First(&user)
	if res.Error != nil && !errors.Is(res.Error, gorm.ErrRecordNotFound) {
		c.GetLogger().Error(res.Error.Error())
		return c.Response.Redirect("/applogin")
	}

	if res.Error != nil && errors.Is(res.Error, gorm.ErrRecordNotFound) {
		return c.Response.Redirect("/applogin")
	}

	ok, err := c.GetHashing().CheckPasswordHash(user.Password, c.CastToString(password))
	if err != nil {
		c.GetLogger().Error(err.Error())
		return c.Response.Redirect("/applogin")
	}

	if !ok {
		return c.Response.Redirect("/applogin")
	}

	token, err := c.GetJWT().GenerateToken(map[string]interface{}{
		"userID": user.ID,
	})

	if err != nil {
		c.GetLogger().Error(err.Error())
		return c.Response.Redirect("/applogin")
	}
	// cache the token
	userAgent := c.GetUserAgent()
	hashedCacheKey := core.CreateAuthTokenHashedCacheKey(user.ID, userAgent)
	err = c.GetCache().Set(hashedCacheKey, token)

	// delete data from old sessions
	sessionKey := fmt.Sprintf("sess_%v", userAgent)
	hashedSessionKey := core.CreateAuthTokenHashedCacheKey(user.ID, sessionKey)
	_ = c.GetCache().Delete(hashedSessionKey)

	if err != nil {
		c.GetLogger().Error(err.Error())
		// TODO set error in session
		return c.Response.Redirect("/applogin")
	}

	// create cookie
	err = core.SetCookie(c.Response.HttpResponseWriter, email.(string), token)
	if err != nil {
		panic(fmt.Sprintf("Error write encrypted cookie: %v", err))
		return c.Response.SetStatusCode(http.StatusInternalServerError)
	}

	// redirect to app
	return c.Response.Redirect("/dashboard")

}

func AppSignout(c *core.Context) *core.Response {

	// check if template engine is enable
	TemplateEnableStr := os.Getenv("TEMPLATE_ENABLE")
	if TemplateEnableStr == "" {
		TemplateEnableStr = "false"
	}
	TemplateEnable, _ := strconv.ParseBool(TemplateEnableStr)

	// Apps web only works if template is enabled in environment
	if !TemplateEnable {
		return c.Response.Redirect("/applogin")
	}

	token := ""

	// get cookie
	usercookie, err := c.GetCookie()
	if err != nil {
		// the cookie could not be read/decrypted, still make sure it is removed from the client
		core.ClearCookie(c.Response.HttpResponseWriter)
		return c.Response.Redirect("/applogin")
	}
	token = usercookie.Token

	if token == "" {
		// no token present, still clear any (possibly present) cookie on the client
		core.ClearCookie(c.Response.HttpResponseWriter)
		return c.Response.Redirect("/applogin")
	}
	payload, err := c.GetJWT().DecodeToken(token)
	if err != nil {
		// the token is invalid, clear the cookie on the client
		core.ClearCookie(c.Response.HttpResponseWriter)
		return c.Response.Redirect("/applogin")
	}
	userAgent := c.GetUserAgent()
	hashedCacheKey := core.CreateAuthTokenHashedCacheKey(uint(c.CastToInt(payload["userID"])), userAgent)

	err = c.GetCache().Delete(hashedCacheKey)
	if err != nil {
		// failed to invalidate the cached token, still clear the cookie on the client
		core.ClearCookie(c.Response.HttpResponseWriter)
		return c.Response.Redirect("/applogin")
	}

	// successful signout: the token is removed from the cache, also clear
	// the cookie on the client before the final redirect
	core.ClearCookie(c.Response.HttpResponseWriter)

	return c.Response.Redirect("/applogin")
}

// Show basic app login
func AppLogin(c *core.Context) *core.Response {

	// check if template engine is enable
	TemplateEnableStr := os.Getenv("TEMPLATE_ENABLE")
	if TemplateEnableStr == "" {
		TemplateEnableStr = "false"
	}
	TemplateEnable, _ := strconv.ParseBool(TemplateEnableStr)

	if TemplateEnable {
		// initiate authority
		session := c.GetSession()
		// true if session is active
		hassession := session.Init(c)
		// only show login if no has session
		if !hassession {

			type templateData struct{}
			tmplData := templateData{}
			return c.Response.Template("login.html", tmplData)

		} else {
			// first, include all compoments
			type templateData struct {
				PageCard components.PageCard
			}

			// now fill data of the components
			tmplData := templateData{
				PageCard: components.PageCard{
					CardTitle: "Golang Framework",
					CardBody:  "Welcome to Goffee",
				},
			}
			return c.Response.Template("welcome.html", tmplData)
		}
	} else {
		return c.Response.SetStatusCode(http.StatusInternalServerError).Json(c.MapToJson(map[string]interface{}{
			"message": "Apps web only works if template is enabled in environment",
		}))
	}
}

// This page is cookie protected by hook
func WelcomeToDashboard(c *core.Context) *core.Response {

	type templateData struct{}

	return c.Response.Template("dashboard.html", templateData{})

}