package api

import (
	"log"
	"time"

	"gitea.urkob.com/urko/prosody-password/internal/api/handler"
	"gitea.urkob.com/urko/prosody-password/internal/services/fail2ban"
	"gitea.urkob.com/urko/prosody-password/internal/services/prosody"
	"github.com/gofiber/fiber/v2"
	"github.com/gofiber/fiber/v2/middleware/cors"
	"github.com/gofiber/fiber/v2/middleware/limiter"
	"github.com/gofiber/template/handlebars/v2"
)

type RestServer struct {
	app            *fiber.App
	prosodyService *prosody.Prosody
	fail2banSrv    *fail2ban.Fail2Ban
}

func NewRestServer(
	prosodyService *prosody.Prosody,
	fail2banSrv *fail2ban.Fail2Ban,
) *RestServer {
	return &RestServer{
		prosodyService: prosodyService,
		fail2banSrv:    fail2banSrv,
	}
}

func (s *RestServer) Start(apiPort, views string) error {
	engine := handlebars.New(views, ".hbs")
	s.app = fiber.New(fiber.Config{
		Views:              engine,
		ProxyHeader:        "X-Forwarded-For",
		EnableIPValidation: true,
	})

	s.app.Use(limiter.New(limiter.Config{
		Max:               8,
		Expiration:        30 * time.Minute,
		LimiterMiddleware: limiter.SlidingWindow{},
	}))

	s.app.Use(cors.New(cors.Config{
		AllowMethods:  "POST,OPTIONS",
		AllowOrigins:  "*",
		AllowHeaders:  "Origin, Accept, Content-Type, X-CSRF-Token, Authorization",
		ExposeHeaders: "Origin",
	}))
	s.loadViews()

	prosodyHdl := handler.NewProsodyHandler(s.prosodyService, s.fail2banSrv)
	s.app.Post("/changePassword", prosodyHdl.Post)

	if err := s.app.Listen(":" + apiPort); err != nil {
		log.Fatalln("app.Listen:", err)
		return err
	}
	return nil
}

func (s *RestServer) loadViews() {
	s.app.Get("/", func(c *fiber.Ctx) error {
		return c.Render("index", fiber.Map{})
	})

	s.app.Get("/error", func(c *fiber.Ctx) error {
		message := c.Query("message")
		return renderError(c, nil, message)
	})
}

func renderError(c *fiber.Ctx, err error, message string) error {
	if err != nil {
		log.Printf("renderError: %s\n", err)
	}
	return c.Render("error", fiber.Map{
		"message": message,
	})
}

func (s *RestServer) Shutdown() error {
	if err := s.app.Server().Shutdown(); err != nil {
		log.Printf("app.Server().Shutdown(): %s\n", err)
		return err
	}
	return nil
}