#include "config.h"
#include "logger.h"
#include "toml.hpp"
#include <iostream>
#include <filesystem>

namespace humanus {

// Initialize static members
Config* Config::_instance = nullptr;
std::mutex Config::_mutex;

void Config::_load_initial_config() {
    try {
        auto config_path = _get_config_path();
        std::cout << "Loading config file from: " << config_path.string() << std::endl;
        
        const auto& data = toml::parse_file(config_path.string());

        // Load LLM configuration
        for (const auto& [key, value] : data) {
            const auto& llm_table = *value.as_table();

            LLMConfig llm_config;

            if (llm_table.contains("model") && llm_table["model"].is_string()) {
                llm_config.model = llm_table["model"].as_string()->get();
            }

            if (llm_table.contains("api_key") && llm_table["api_key"].is_string()) {
                llm_config.api_key = llm_table["api_key"].as_string()->get();
            }

            if (llm_table.contains("base_url") && llm_table["base_url"].is_string()) {
                llm_config.base_url = llm_table["base_url"].as_string()->get();
            }

            if (llm_table.contains("end_point") && llm_table["end_point"].is_string()) {
                llm_config.end_point = llm_table["end_point"].as_string()->get();
            }
            
            if (llm_table.contains("max_tokens") && llm_table["max_tokens"].is_integer()) {
                llm_config.max_tokens = llm_table["max_tokens"].as_integer()->get();
            }

            if (llm_table.contains("timeout") && llm_table["timeout"].is_integer()) {
                llm_config.timeout = llm_table["timeout"].as_integer()->get();
            }

            if (llm_table.contains("temperature") && llm_table["temperature"].is_floating_point()) {
                llm_config.temperature = llm_table["temperature"].as_floating_point()->get();
            }

            if (llm_table.contains("oai_tool_support") && llm_table["oai_tool_support"].is_boolean()) {
                llm_config.oai_tool_support = llm_table["oai_tool_support"].as_boolean()->get();
            }

            _config.llm[std::string(key.str())] = llm_config;

            if (!llm_config.oai_tool_support) {
                // Load tool helper configuration
                ToolParser tool_parser;
                if (llm_table.contains("tool_parser") && llm_table["tool_parser"].is_table()) {
                    const auto& tool_parser_table = *llm_table["tool_parser"].as_table();
                    if (tool_parser_table.contains("tool_start")) {
                        tool_parser.tool_start = tool_parser_table["tool_start"].as_string()->get();
                    }

                    if (tool_parser_table.contains("tool_end")) {
                        tool_parser.tool_end = tool_parser_table["tool_end"].as_string()->get();
                    }

                    if (tool_parser_table.contains("tool_hint_template")) {
                        tool_parser.tool_hint_template = tool_parser_table["tool_hint_template"].as_string()->get();
                    }
                }
                _config.tool_parser[std::string(key.str())] = tool_parser;
            }
        }

        if (_config.llm.empty()) {
            throw std::runtime_error("No LLM configuration found");
        } else if (_config.llm.find("default") == _config.llm.end()) {
            _config.llm["default"] = _config.llm.begin()->second;
        }

        if (_config.tool_parser.find("default") == _config.tool_parser.end()) {
            _config.tool_parser["default"] = ToolParser();
        }
    } catch (const std::exception& e) {
        std::cerr << "Loading config file failed: " << e.what() << std::endl;
        // Set default configuration
        _config.llm["default"] = LLMConfig();
        _config.tool_parser["default"] = ToolParser();
    }
}

} // namespace humanus