// Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

#include <yaml-cpp/yaml.h>

#include <string>
#include <unordered_map>

#include "absl/status/status.h"
#include "absl/status/statusor.h"
#include "utility.h"

enum VectorType { VECTOR_INT, VECTOR_FLOAT, VECTOR_STRING, VECTOR_UNKNOWN };

struct VectorVariant {
  VectorType type;
  std::vector<int> vec_int;
  std::vector<float> vec_float;
  std::vector<std::string> vec_string;
};

class YamlConfig {
public:
  YamlConfig(const std::unordered_map<std::string, std::string> &data)
      : data_(data) {}
  YamlConfig(const std::string &model_dir);
  YamlConfig() = default;
  ~YamlConfig() = default;

  void Init();
  std::unordered_map<std::string, std::string> PreProcessOpInfo() {
    return pre_process_op_info_;
  };
  std::unordered_map<std::string, std::string> PostProcessOpInfo() {
    return post_process_op_info_;
  };
  absl::StatusOr<std::string>
  GetString(const std::string &key,
            const std::string &default_value = "") const;
  absl::StatusOr<int> GetInt(const std::string &key, int default_value) const;
  absl::StatusOr<float> GetFloat(const std::string &key,
                                 float default_value) const;
  absl::StatusOr<double> GetDouble(const std::string &key) const;
  absl::StatusOr<bool> GetBool(const std::string &key,
                               bool default_value) const;
  absl::StatusOr<std::unordered_map<std::string, std::string>>
  GetSubModule(const std::string &key) const;

  absl::Status HasKey(const std::string &key) const;

  absl::Status PrintAll() const;
  absl::Status PrintWithPrefix(const std::string &prefix) const;
  absl::Status FindPreProcessOp(
      const std::string &prefix = "PreProcess.transform_ops[0]") const;
  std::unordered_map<std::string, std::string> &Data() { return data_; };
  std::string ConfigYamlPath() { return config_yaml_path_; };
  absl::Status GetConfigYamlPaths(const std::string &model_dir);
  absl::Status LoadYamlFile();
  absl::StatusOr<std::pair<std::string, std::string>>
  FindKey(const std::string &key);
  static VectorVariant SmartParseVector(const std::string &input);

private:
  std::string config_yaml_path_;
  void ParseNode(const YAML::Node &node, const std::string &prefix = "");
  std::unordered_map<std::string, std::string> data_;
  std::unordered_map<std::string, std::string> pre_process_op_info_;
  std::unordered_map<std::string, std::string> post_process_op_info_;
};