#pragma once

#include <map>
#include <cstdint>
#include <optional>
#include <string>
#include <string_view>
#include <variant>

namespace renderive::web {

enum class Gallery_Frame_Mode : std::uint8_t {
    Manual,
    Low_Latency,
    Playback
};

struct Gallery_Open_Request {
    std::string case_id;
    Gallery_Frame_Mode frame_mode = Gallery_Frame_Mode::Low_Latency;
};

using Gallery_Value = std::variant<bool, double, std::string>;

struct Gallery_State {
    std::map<std::string, Gallery_Value, std::less<>> values;
};

struct Gallery_Patch_Result {
    std::optional<Gallery_State> candidate;
    std::string response_json;
};

struct Gallery_Action_Request {
    std::string id;
    std::optional<Gallery_Value> argument;
};

class Gallery_Protocol final {
public:
    [[nodiscard]] static std::string catalog_json();
    [[nodiscard]] static bool is_case(std::string_view case_id);
    [[nodiscard]] static Gallery_State default_state(std::string_view case_id);
    [[nodiscard]] static Gallery_State default_state(
        std::string_view case_id, Gallery_Frame_Mode frame_mode);
    [[nodiscard]] static std::string case_json(
        std::string_view case_id,
        const Gallery_State& state,
        std::string_view telemetry_json = "{}",
        std::string_view notice = {});
    [[nodiscard]] static std::string case_json(
        std::string_view case_id,
        const Gallery_State& state,
        std::string_view telemetry_json,
        std::string_view notice,
        Gallery_Frame_Mode frame_mode);
    [[nodiscard]] static std::string error_json(
        std::string_view message,
        std::string_view field = {});
    [[nodiscard]] static std::string observer_json(
        std::string_view case_id,
        Gallery_Frame_Mode frame_mode,
        std::string_view telemetry_json);
    [[nodiscard]] static Gallery_Patch_Result apply_patch(
        std::string_view case_id,
        const Gallery_State& current,
        std::string_view message);
    [[nodiscard]] static Gallery_Patch_Result apply_patch(
        std::string_view case_id,
        const Gallery_State& current,
        std::string_view message,
        Gallery_Frame_Mode frame_mode);
    [[nodiscard]] static std::optional<Gallery_Open_Request> open_request(
        std::string_view message);
    [[nodiscard]] static std::optional<Gallery_Action_Request> action_request(
        std::string_view message);
    [[nodiscard]] static std::size_t control_count(std::string_view case_id);
    [[nodiscard]] static std::size_t control_count(
        std::string_view case_id, Gallery_Frame_Mode frame_mode);
    [[nodiscard]] static std::size_t action_count(std::string_view case_id);
    [[nodiscard]] static std::size_t action_count(
        std::string_view case_id, Gallery_Frame_Mode frame_mode);
    [[nodiscard]] static bool action_available(
        std::string_view case_id, Gallery_Frame_Mode frame_mode,
        std::string_view action_id);
};

} // namespace renderive::web