#pragma once

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

#include "cvmmap_streamer/ipc/contracts.hpp"

namespace cvmmap_streamer {

enum class CodecType {
	H264,
	H265,
};

enum class RunMode {
	Pipeline,
	Ingest,
};

enum class InputMode {
	Real,
	Dummy,
};

enum class RtmpMode {
	Enhanced,
	Domestic,
};

struct InputConfig {
	std::string shm_name{"cvmmap_default"};
	std::string zmq_endpoint{"ipc:///tmp/cvmmap_default"};
};

struct DummyInputConfig {
	std::uint32_t frames{0};
	std::uint32_t fps{60};
	std::uint16_t width{64};
	std::uint16_t height{48};
	std::optional<std::uint32_t> emit_reset_at{};
	std::optional<std::uint32_t> emit_reset_every{};
	std::string label{"dummy"};
	std::uint8_t channels{3};
	ipc::Depth depth{ipc::Depth::U8};
	ipc::PixelFormat pixel_format{ipc::PixelFormat::BGR};
	std::uint64_t start_timestamp_ns{1'000'000'000ull};
	std::uint32_t startup_delay_ms{100};
};

struct RtmpOutputConfig {
	bool enabled{false};
	std::vector<std::string> urls{};
	RtmpMode mode{RtmpMode::Enhanced};
};

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 LatencyConfig {
	std::size_t queue_size{1};
	std::uint32_t gop{30};
	std::uint32_t b_frames{0};
	bool realtime_sync{true};
	bool force_idr_on_reset{true};
	std::uint32_t ingest_max_frames{0};
	std::uint32_t ingest_idle_timeout_ms{1000};
	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{};
	DummyInputConfig dummy{};
	InputMode input_mode{InputMode::Real};
	RunMode run_mode{RunMode::Pipeline};
	CodecType codec{CodecType::H264};
	OutputsConfig outputs{};
	LatencyConfig latency{};

	static RuntimeConfig defaults();
};

std::string_view to_string(CodecType codec);
std::string_view to_string(RunMode mode);
std::string_view to_string(InputMode mode);
std::string_view to_string(RtmpMode mode);

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);

}