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module;

#include "kataglyphis_export.h"
#include <cstdint>
#include <expected>
#include <filesystem>
#include <string>
#include <vector>

export module kataglyphis.config_loader;

export namespace kataglyphis::config {

enum class ConfigError { FileNotFound, ParseError, MissingField, InvalidValue };

struct VideoConfig
{
    std::uint32_t default_width{ 1280 };
    std::uint32_t default_height{ 720 };
    std::uint32_t default_framerate{ 30 };
    std::uint32_t default_bitrate_kbps{ 2000 };
};

struct TextureConfig
{
    std::uint32_t width{ 640 };
    std::uint32_t height{ 480 };
};

struct AndroidConfig
{
    std::uint32_t width{ 320 };
    std::uint32_t height{ 240 };
    std::uint32_t fps{ 15 };
};

struct WebRTCConfig
{
    std::string signaling_server_url{ "ws://127.0.0.1:8443" };
    std::uint32_t reconnection_timeout_ms{ 5000 };
    std::vector<std::string> stun_servers;
    std::vector<std::string> turn_servers;
    VideoConfig video;
    TextureConfig texture;
    AndroidConfig android;
};

[[nodiscard]] KATAGLYPHIS_CPP_API auto load_webrtc_config(const std::filesystem::path &config_path)
  -> std::expected<WebRTCConfig, ConfigError>;

[[nodiscard]] KATAGLYPHIS_CPP_API auto parse_webrtc_config(const std::string &json_content)
  -> std::expected<WebRTCConfig, ConfigError>;

[[nodiscard]] KATAGLYPHIS_CPP_API auto get_default_webrtc_config() -> WebRTCConfig;

}// namespace kataglyphis::config