package server

import (
	"errors"
	"net/http"

	"chat-agent-system/internal/app/chatflow"
	"chat-agent-system/internal/auth"
)

func (s *Server) chatPrincipal(user *auth.UserAccount, action chatflow.Action) chatflow.Principal {
	if user == nil {
		return chatflow.Principal{Action: action}
	}
	return chatflow.Principal{UserID: user.ID, Action: action}
}

func (s *Server) writeChatLogError(w http.ResponseWriter, err error) {
	switch {
	case errors.Is(err, chatflow.ErrUnauthenticated):
		writeSafeError(w, nil, http.StatusUnauthorized, `{"error":"ERR_UNAUTHENTICATED","message":"请先登录"}`)
	case errors.Is(err, chatflow.ErrForbidden):
		writeJSONResponse(w, http.StatusForbidden, map[string]string{
			"error_code": "SESSION_FORBIDDEN",
			"message":    "无权访问该会话",
		})
	case errors.Is(err, chatflow.ErrNotFound):
		writeJSONResponse(w, http.StatusNotFound, map[string]string{
			"error_code": "SESSION_NOT_FOUND",
			"message":    "指定会话不存在或已被删除",
		})
	case errors.Is(err, chatflow.ErrClosed):
		writeSafeError(w, nil, http.StatusServiceUnavailable, "context manager not initialized")
	default:
		writeSafeError(w, nil, http.StatusInternalServerError, err.Error())
	}
}