#pragma once

#include <cstddef>
#include <cstdint>
#include <expected>
#include <optional>
#include <string>
#include <string_view>
#include <vector>

namespace cvmmap_streamer {

enum class CodecType {
	H264,
	H265,
};

enum class RunMode {
	Pipeline,
	Ingest,
};

enum class RtmpMode {
	Enhanced,
};

enum class RtmpTransportType {
	Libavformat,
	FfmpegProcess,
};

enum class EncoderBackendType {
	Auto,
	FFmpeg,
};

enum class EncoderDeviceType {
	Auto,
	Nvidia,
	Software,
};

enum class InputVideoSource {
	Auto,
	Raw,
	Encoded,
};

enum class McapCompression {
	None,
	Lz4,
	Zstd,
};

struct InputConfig {
	std::string uri{"cvmmap://default"};
	std::string nats_url{"nats://localhost:4222"};
	InputVideoSource video_source{InputVideoSource::Auto};
};

struct EncoderConfig {
	EncoderBackendType backend{EncoderBackendType::Auto};
	EncoderDeviceType device{EncoderDeviceType::Auto};
	CodecType codec{CodecType::H264};
	std::uint32_t gop{30};
	std::uint32_t b_frames{0};
};

struct RtmpOutputConfig {
	bool enabled{false};
	std::vector<std::string> urls{};
	RtmpTransportType transport{RtmpTransportType::Libavformat};
	std::string ffmpeg_path{"ffmpeg"};
};

struct RtpOutputConfig {
	bool enabled{false};
	std::optional<std::string> endpoint{std::nullopt};
	std::optional<std::string> host{std::nullopt};
	std::optional<std::uint16_t> port{std::nullopt};
	std::uint8_t payload_type{96};
	std::optional<std::string> sdp_path{std::nullopt};
};

struct OutputsConfig {
	RtmpOutputConfig rtmp{};
	RtpOutputConfig rtp{};
};

struct McapRecordConfig {
	bool enabled{false};
	std::string path{"capture.mcap"};
	std::string topic{"/camera/video"};
	std::string depth_topic{"/camera/depth"};
	std::string calibration_topic{"/camera/calibration"};
	std::string depth_calibration_topic{"/camera/depth_calibration"};
	std::string pose_topic{"/camera/pose"};
	std::string body_topic{"/camera/body"};
	std::string frame_id{"camera"};
	McapCompression compression{McapCompression::Zstd};
};

struct RecordConfig {
	McapRecordConfig mcap{};
};

struct LatencyConfig {
	std::size_t queue_size{1};
	bool realtime_sync{true};
	bool force_idr_on_reset{true};
	bool keep_stream_on_reset{false};
	std::uint32_t ingest_max_frames{0};
	std::uint32_t ingest_idle_timeout_ms{0};
	std::uint32_t ingest_consumer_delay_ms{0};
	std::uint32_t snapshot_copy_delay_us{0};
	std::uint32_t emit_stall_ms{0};
};

struct RuntimeConfig {
	InputConfig input{};
	RunMode run_mode{RunMode::Pipeline};
	EncoderConfig encoder{};
	OutputsConfig outputs{};
	RecordConfig record{};
	LatencyConfig latency{};

	static RuntimeConfig defaults();
};

std::string_view to_string(CodecType codec);
std::string_view to_string(RunMode mode);
std::string_view to_string(RtmpMode mode);
std::string_view to_string(RtmpTransportType transport);
std::string_view to_string(EncoderBackendType backend);
std::string_view to_string(EncoderDeviceType device);
std::string_view to_string(InputVideoSource source);
std::string_view to_string(McapCompression compression);
std::expected<McapCompression, std::string> parse_mcap_compression(std::string_view raw);

std::expected<RuntimeConfig, std::string> parse_runtime_config(int argc, char **argv);
std::expected<void, std::string> validate_runtime_config(const RuntimeConfig &config);
std::string summarize_runtime_config(const RuntimeConfig &config);

}