package server

import (
	"fmt"
	"html/template"
	"net/http"

	"github.com/labstack/echo/v4"
	"github.com/markbates/goth/gothic"

	"github.com/rjNemo/rentease/internal/auth"
	"github.com/rjNemo/rentease/internal/view"
)

var indexTemplate = `{{range $key,$value:=.Providers}}
    <p><a href="/auth?provider={{$value}}">Log in with {{index $.ProvidersMap $value}}</a></p>
{{end}}`

var userTemplate = `
<p><a href="/logout?provider={{.Provider}}">logout</a></p>
<p>Name: {{.Name}} [{{.LastName}}, {{.FirstName}}]</p>
<p>Email: {{.Email}}</p>
<p>NickName: {{.NickName}}</p>
<p>Location: {{.Location}}</p>
<p>AvatarURL: {{.AvatarURL}} <img src="{{.AvatarURL}}"></p>
<p>Description: {{.Description}}</p>
<p>UserID: {{.UserID}}</p>
<p>AccessToken: {{.AccessToken}}</p>
<p>ExpiresAt: {{.ExpiresAt}}</p>
<p>RefreshToken: {{.RefreshToken}}</p>
`

func handleProviderCallback() echo.HandlerFunc {
	return func(c echo.Context) error {
		res := c.Response()
		req := c.Request()
		user, err := gothic.CompleteUserAuth(res, req)
		if err != nil {
			fmt.Fprintln(res, err)
			return nil
		}
		t, _ := template.New("foo").Parse(userTemplate)
		return t.Execute(res, user)
	}
}

func handleProviderLogout() echo.HandlerFunc {
	return func(c echo.Context) error {
		res := c.Response()
		req := c.Request()
		err := gothic.Logout(res, req)
		res.Header().Set("Location", "/")
		res.WriteHeader(http.StatusTemporaryRedirect)
		return err
	}
}

func handleProvider() echo.HandlerFunc {
	return func(c echo.Context) error {
		res := c.Response()
		req := c.Request()
		// try to get the user without re-authenticating
		if gothUser, err := gothic.CompleteUserAuth(res, req); err == nil {
			t, _ := template.New("foo").Parse(userTemplate)
			return t.Execute(res, gothUser)
		} else {
			gothic.BeginAuthHandler(res, req)
			return nil
		}
	}
}

func handleLoginPage(as *auth.Service) echo.HandlerFunc {
	return func(c echo.Context) error {
		return renderTempl(c, http.StatusOK, view.Login(as.GetProviderIndex()))
	}
}