LinkGeometry.h

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// SPDX-FileCopyrightText: 2026 Valentin Eloy
// SPDX-License-Identifier: GPL-3.0-or-later
 
#pragma once
 
#include <vector>
 
#include "Core/Levels/GridPosition.h"
#include "Core/Levels/TileType.h"
#include "Core/Math/Vector2.h"

 
namespace core {
class LevelDraft;
}
 
namespace hmi {

[[nodiscard]] constexpr bool isTriggerTile(core::TileType type) noexcept {
    return type == core::TileType::Switch || type == core::TileType::PressurePlate ||
           type == core::TileType::Key;
}

[[nodiscard]] constexpr bool isLinkTargetTile(core::TileType type) noexcept {
    return type == core::TileType::Door || type == core::TileType::LockedDoor;
}

struct LinkSegment {
    core::Vector2 a;
    core::Vector2 b;
};

[[nodiscard]] LinkSegment linkSegment(core::GridPosition trigger, core::GridPosition target,
                                      int fanIndex = 0, int fanCount = 1) noexcept;

struct ArrowHead {
    core::Vector2 left;
    core::Vector2 right;
};

[[nodiscard]] ArrowHead arrowHead(core::Vector2 from, core::Vector2 to) noexcept;

enum class LinkKind { Mechanism };

struct LinkRow {
    LinkKind kind;
    core::GridPosition trigger;
    core::GridPosition target;
};

[[nodiscard]] std::vector<LinkRow> buildLinkRows(const core::LevelDraft& draft);
 
}  // namespace hmi