#pragma once

#include <map>
#include <optional>
#include <string>
#include <vector>

#include <QPoint>
#include <QSize>

#include "BuildingType.h"
#include "BuildingId.h"

#include "entt/entity/entity.hpp"
#include "Item.h"
#include "ItemType.h"
#include "Port.h"
#include "Rotation.h"
#include "ShipLayout.h"
#include "Tick.h"

// Per-material input buffer for a production building.
struct InputBuffer
{
    std::map<ItemType, int> counts;  // current item counts per material
    std::map<ItemType, int> caps;    // max items per material (2× per-cycle requirement)
};

// Output buffer shared by all output materials for a production building.
struct OutputBuffer
{
    std::vector<Item> items;
    int capacity = 0;  // 2× per-cycle output; 1× for ReprocessingPlant
};

// Active production cycle for a building.
struct Production
{
    std::string recipeId;
    Tick completesAt = 0;
    std::vector<Item> chosenOutputs;  // resolved at cycle start (reprocessing rolls here)
};

// A building placed on the map that is still under construction.
// Occupies tiles but does not produce.
struct ConstructionSite
{
    BuildingId     id            = kInvalidBuildingId;
    QPoint       anchor;                        // top-left of body bounding box
    QSize        footprint;
    std::vector<QPoint> bodyCells;              // absolute world tile coordinates
    Rotation     rotation      = Rotation::East;
    BuildingType type          = BuildingType::Miner;
    std::string  recipeId;                      // may be configured before completion
    Tick         completesAt   = 0;             // 0 = queued but not yet started
    std::optional<ShipLayoutConfig> shipLayout;
};

// A fully constructed, operational building.
struct Building
{
    BuildingId     id            = kInvalidBuildingId;
    QPoint       anchor;                        // top-left of body bounding box
    QSize        footprint;
    Rotation     rotation      = Rotation::East;
    BuildingType type          = BuildingType::Miner;
    std::string  recipeId;                      // empty = none selected

    InputBuffer  inputBuffer;
    OutputBuffer outputBuffer;
    std::optional<Production> production;

    // Pre-computed from surface mask at placement; in absolute world coordinates.
    std::vector<QPoint> bodyCells;
    std::vector<Port>   outputPorts;
    std::vector<Port>   inputPorts;  // perimeter tiles (minus output-port tiles),
                                     // direction pointing INTO building

    // Module layout for shipyards (REQ-MOD-LAYOUT).
    std::optional<ShipLayoutConfig> shipLayout;
};