#ifndef muz_COMPILER_HPP
#define muz_COMPILER_HPP

#include "commons.hpp"
#include "Node.hpp"
#include "AudioConf.hpp"
#include "Signal.hpp"

namespace muz
{
  MUZ_ERROR(compile_error);

  /**
   * Create a signal given an abstract syntax tree.
   * @see Signal
   * @see Parser
   * @see Node
   **/
  class Compiler
  {
  public:
    explicit Compiler(AudioConf const& conf);
    virtual ~Compiler();

    std::vector<std::unique_ptr<Signal>> compile(std::shared_ptr<Node> node);
    void compile_node(std::shared_ptr<Node> node);
    void execute_cmd(std::string const& name, std::shared_ptr<Node> node);

  private:
    AudioConf const& m_conf;
    std::vector<std::unique_ptr<Signal>> m_signals;
    std::vector<std::unique_ptr<Signal>> m_outputs;

    // signal stack
    // ------------
    void push(std::unique_ptr<Signal> signal);
    std::unique_ptr<Signal> pop();

    void check_cmd_arity(Node const& node, int arity);
  };
}

#endif