package main

import (
	"encoding/json"
	"fmt"
	"log"
	"time"

	"github.com/gofiber/fiber/v2"
)

const UserKey = "github.com/aziis98/lupus-lite/user"

func requestUser(c *fiber.Ctx) *User {
	return c.Locals(UserKey).(*User)
}

func RequireLoggedMiddleware(auth Auth) fiber.Handler {
	return func(c *fiber.Ctx) error {
		token := c.Cookies("sid")
		if token == "" {
			return fmt.Errorf(`request has no session token`)
		}

		username, err := auth.UserForSession(token)
		if err != nil {
			return err
		}

		user, err := auth.GetUser(username)
		if err != nil {
			return err
		}

		c.Locals(UserKey, &user)

		return c.Next()
	}
}

func mountApiRoutes(api fiber.Router) {
	db, err := NewInMemoryDB()
	if err != nil {
		log.Fatal(err)
	}

	auth := NewInMemoryAuth(db)
	requireLogged := RequireLoggedMiddleware(auth)

	api.Get("/status", func(c *fiber.Ctx) error {
		s, err := json.MarshalIndent(db, "", "  ")
		if err != nil {
			return err
		}

		log.Println(string(s))

		return c.SendString("ok")
	})

	api.Post("/login", func(c *fiber.Ctx) error {
		var loginForm struct {
			Username string `form:"username"`
			Password string `form:"password"`
		}

		if err := c.BodyParser(&loginForm); err != nil {
			return err
		}

		token, err := auth.Login(loginForm.Username, loginForm.Password)
		if err != nil {
			return err
		}

		c.Cookie(&fiber.Cookie{
			Name:    "sid",
			Value:   token,
			Path:    "/",
			Expires: time.Now().Add(3 * 24 * time.Hour),
		})

		return c.Redirect("/")
	})

	api.Post("/logout", func(c *fiber.Ctx) error {
		c.Cookie(&fiber.Cookie{
			Name:    "sid",
			Value:   "",
			Path:    "/",
			Expires: time.Now(),
		})

		return c.SendString("ok")
	})

	api.Post("/register", func(c *fiber.Ctx) error {
		var loginForm struct {
			Username  string `form:"username"`
			Password  string `form:"password"`
			Password2 string `form:"password2"`
		}

		if err := c.BodyParser(&loginForm); err != nil {
			return err
		}

		if err := validateUsername(loginForm.Username); err != nil {
			return err
		}
		if err := validatePasswords(loginForm.Password, loginForm.Password2); err != nil {
			return err
		}

		if err := auth.Register(loginForm.Username, loginForm.Password); err != nil {
			return err
		}

		return c.Redirect("/login")
	})

	api.Get("/user", requireLogged, func(c *fiber.Ctx) error {
		return c.JSON(requestUser(c).PublicUser())
	})

}