package api

import (
	"encoding/json"
	"errors"
	"net/http"

	"gitea.mrixs.me/minecraft-platform/backend/internal/core"
	"gitea.mrixs.me/minecraft-platform/backend/internal/database"
	"gitea.mrixs.me/minecraft-platform/backend/internal/models"
)

type UserHandler struct {
	Service *core.UserService
}

func (h *UserHandler) Register(w http.ResponseWriter, r *http.Request) {
	var req models.RegisterRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		http.Error(w, "Invalid request body", http.StatusBadRequest)
		return
	}

	err := h.Service.RegisterNewUser(r.Context(), req)
	if err != nil {
		switch {
		case errors.Is(err, database.ErrUserExists):
			http.Error(w, err.Error(), http.StatusConflict)
		case errors.Is(err, core.ErrInvalidUsername), errors.Is(err, core.ErrInvalidEmail), errors.Is(err, core.ErrPasswordTooShort):
			http.Error(w, err.Error(), http.StatusBadRequest)
		default:
			http.Error(w, "Internal server error", http.StatusInternalServerError)
		}
		return
	}

	w.WriteHeader(http.StatusCreated)
}