LevelLoader.h

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// SPDX-FileCopyrightText: 2026 Valentin Eloy
// SPDX-License-Identifier: GPL-3.0-or-later
 
#pragma once
 
#include <filesystem>
#include <optional>
#include <string>
#include <string_view>
 
#include "Core/Levels/Level.h"

 
namespace core {

enum class LevelValidationError {
    None,                      
    ParseError,                
    UnknownTileType,           
    OutOfBounds,               
    DuplicatePosition,         
    MissingSwitchId,           
    DuplicateSwitchId,         
    InvalidEntryCount,         
    InvalidExitCount,          
    UnresolvedMechanism,       
    FileNotFound,              
    UnsupportedFormatVersion,  
    InvalidCameraFraming,      
};

inline constexpr int LEVEL_FORMAT_VERSION = 3;

struct LevelLoadResult {
    std::optional<Level> level;
    std::string error;
    LevelValidationError errorCode = LevelValidationError::None;

    [[nodiscard]] bool ok() const noexcept {
        return level.has_value();
    }
};

class LevelLoader {
public:
    [[nodiscard]] static LevelLoadResult loadFromString(std::string_view json);

    [[nodiscard]] static LevelLoadResult loadFromFile(const std::filesystem::path& path);
};
 
}  // namespace core