package server

import (
	"log/slog"
	"net/http"

	"level3.git.onstackit.cloud/LEVEL3/gabriel/src/api"
	"level3.git.onstackit.cloud/LEVEL3/gabriel/src/auth"
)

func (s *Server) LoginUser(w http.ResponseWriter, r *http.Request) {
	slog.Debug("LoginUser endpoint called")
	req, err := reqBody[api.AuthRequest](r.Body)
	if err != nil {
		slog.Debug("Failed to parse login request body", "error", err)
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	user, err := auth.Login(auth.UserData{
		Username: req.Username,
		Password: req.Password,
	})
	if err != nil {
		switch err {
		case auth.ErrUserNotFound, auth.ErrInvalidPassword:
			slog.Debug("Invalid username or password", "username", req.Username)
			writeJSONResponse(w, http.StatusUnauthorized, map[string]string{"error": "invalid username or password"})
		default:
			slog.Error("Failed to login user", "username", req.Username, "error", err)
			writeJSONResponse(w, http.StatusInternalServerError, map[string]string{"error": "internal server error"})
		}
		return
	}

	slog.Debug("User login successful", "username", req.Username)
	writeJSONResponse(w, http.StatusOK, api.AuthResponse{
		Token: user.Token,
		Role:  api.Default,
	})
}

func (s *Server) RegisterUser(w http.ResponseWriter, r *http.Request) {
	slog.Debug("RegisterUser endpoint called")
	req, err := reqBody[api.AuthRequest](r.Body)
	if err != nil {
		slog.Debug("Failed to parse registration request body", "error", err)
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	if s.inviteCode != "" {
		if req.InviteCode == nil || *req.InviteCode != s.inviteCode {
			slog.Debug("Invalid invite code", "username", req.Username)
			writeJSONResponse(w, http.StatusForbidden, map[string]string{"error": "invalid invite code"})
			return
		}
	}

	if err := auth.Register(auth.UserData{
		Username: req.Username,
		Password: req.Password,
	}); err != nil {
		slog.Error("Failed to register user", "username", req.Username, "error", err)
		writeJSONResponse(w, http.StatusInternalServerError, map[string]string{"error": "failed to register user"})
		return
	}

	slog.Debug("User registered successfully", "username", req.Username)
	user, err := auth.Login(auth.UserData{
		Username: req.Username,
		Password: req.Password,
	})
	if err != nil {
		slog.Error("Failed to login user after registration", "username", req.Username, "error", err)
		writeJSONResponse(w, http.StatusInternalServerError, map[string]string{"error": "failed to login after registration"})
		return
	}

	slog.Debug("User login successful after registration", "username", req.Username)
	writeJSONResponse(w, http.StatusCreated, api.AuthResponse{
		Token: user.Token,
		Role:  api.Default,
	})
}