package api

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

	"geniusrun/backend/internal/auth"
)

func (s *Server) handleSetup(w http.ResponseWriter, r *http.Request) {
	claims, ok := auth.ClaimsFromContext(r.Context())
	if !ok {
		writeError(w, http.StatusUnauthorized, "not authenticated")
		return
	}
	if _, found := userFromContext(r.Context()); found {
		writeError(w, http.StatusConflict, "profile already exists for this account")
		return
	}

	var body struct {
		DisplayName string `json:"display_name"`
	}
	if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
		writeError(w, http.StatusBadRequest, "invalid request body")
		return
	}
	if body.DisplayName == "" {
		writeError(w, http.StatusBadRequest, "display_name is required")
		return
	}

	userID, err := s.DB.ProvisionUser(r.Context(), claims.Sub, body.DisplayName)
	if err != nil {
		writeError(w, http.StatusInternalServerError, err.Error())
		return
	}
	writeJSON(w, http.StatusOK, map[string]any{"user_id": userID, "display_name": body.DisplayName})
}