package user

import (
	"errors"
	"net/http"

	"git.samuelpua.com/telboon/ktm-train-bot/backend/internal/common"
	"github.com/go-chi/render"
	"github.com/go-playground/validator/v10"
)

// User Register
// @Summary For user registration
// @Description Description
// @Tags User
// @Accept json
// @Produce json
// @Param user body UserRegisterRequest true "User registration info"
// @Success 200 {object} UserResponse
// @Failure 400 {object} common.ErrResponse
// @Router /api/v1/user/register [post]
func (env *Env) registerRouteHandler(w http.ResponseWriter, r *http.Request) {
	data := &UserRegisterRequest{}
	err := render.DecodeJSON(r.Body, data)
	if err != nil {
		render.Render(w, r, common.ErrInvalidRequest(err))
		return
	}

	err = validator.New().Struct(data)
	if err != nil {
		render.Render(w, r, common.ErrValidationError(err))
		return
	}

	createdUser, err := env.registerUser(data.Username, data.Password)
	if err != nil {
		render.Render(w, r, common.ErrInternalError(err))
		return
	}

	render.Status(r, http.StatusCreated)
	render.Render(w, r, env.NewUserResponse(createdUser))
}

// Login
// @Summary For user login
// @Description Description
// @Tags User
// @Accept json
// @Produce json
// @Param user body UserLoginRequest true "User Login info"
// @Success 200 {object} UserResponse
// @Failure 400 {object} common.ErrResponse
// @Router /api/v1/user/login [post]
func (env *Env) loginRouteHandler(w http.ResponseWriter, r *http.Request) {
	data := &UserLoginRequest{}
	err := render.DecodeJSON(r.Body, data)
	if err != nil {
		render.Render(w, r, common.ErrInvalidRequest(err))
		return
	}

	err = validator.New().Struct(data)
	if err != nil {
		render.Render(w, r, common.ErrValidationError(err))
		return
	}

	loginUser, err := env.checkLogin(data.Username, data.Password)
	if err != nil {
		render.Render(w, r, common.ErrInternalError(err))
		return
	}

	sessionToken, err := env.createSession(loginUser)
	if err != nil {
		render.Render(w, r, common.ErrInternalError(err))
		return
	}

	loginCookie := http.Cookie{
		Name:   env.CookieString,
		Value:  sessionToken,
		MaxAge: 7776000,
		Path:   "/",
	}
	http.SetCookie(w, &loginCookie)

	render.Render(w, r, env.NewUserResponse(loginUser))
}

// Logout
// @Summary For user logout
// @Description Description
// @Tags User
// @Accept json
// @Produce json
// @Success 200 {object} common.TextResponse
// @Failure 400 {object} common.ErrResponse
// @Router /api/v1/user/logout [post]
func (env *Env) logoutRouteHandler(w http.ResponseWriter, r *http.Request) {
	cookie, err := r.Cookie(env.CookieString)
	if err != nil {
		err = errors.New("user not logged in")
		render.Render(w, r, common.ErrInternalError(err))
		return
	}

	err = env.logout(cookie.Value)
	if err != nil {
		render.Render(w, r, common.ErrInternalError(err))
		return
	}

	render.Render(w, r, common.NewGenericTextResponse("Ok", "Successfully logged out"))
}

// Check current user
// @Summary Returns current logged in user
// @Description Description
// @Tags User
// @Accept json
// @Produce json
// @Success 200 {object} UserResponse
// @Failure 400 {object} common.ErrResponse
// @Router /api/v1/user/me [get]
func (env *Env) meRouteHandler(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	currUser, ok := ctx.Value(UserContextKey).(*User)
	if !ok {
		err := errors.New("user not logged in")
		render.Render(w, r, common.ErrInternalError(err))
		return
	}
	render.Render(w, r, env.NewUserResponse(currUser))
}