ItemRegistry

contract ItemRegistry is IItem, Context {
    mapping(address => mapping(bytes32 => Item)) private Items;
    
    event ItemAdded(address indexed owner, bytes32 indexed itemId, Item item);
    error ItemRegistryMismatchedArraysLength();
}

function getItem(address owner, bytes32 itemId) 
    external 
    view 
    override 
    returns (Item memory);

function addItem(bytes32 itemId, Item calldata item) external override;

function addItemsBatch(
    bytes32[] calldata itemIds,
    Item[] calldata items
) external;

struct Item {
    uint256 actualWeight;       // Actual weight of item
    bytes32 dimensions;          // Physical dimensions
    bytes32 category;            // Item category
    uint256 declaredCurrency;    // Currency value
}

event ItemAdded(address indexed owner, bytes32 indexed itemId, Item item);

error ItemRegistryMismatchedArraysLength();

// Add single item
const itemId = ethers.utils.keccak256(ethers.utils.toUtf8Bytes('product-v1'));
const item = {
  actualWeight: 500, // grams
  dimensions: ethers.utils.keccak256(ethers.utils.toUtf8Bytes('10x10x5')),
  category: ethers.utils.keccak256(ethers.utils.toUtf8Bytes('hardware')),
  declaredCurrency: ethers.utils.parseEther('50')
};

await itemRegistry.addItem(itemId, item);

// Add multiple items
const itemIds = [
  ethers.utils.keccak256(ethers.utils.toUtf8Bytes('product-v1')),
  ethers.utils.keccak256(ethers.utils.toUtf8Bytes('product-v2')),
  ethers.utils.keccak256(ethers.utils.toUtf8Bytes('t-shirt'))
];

const items = [
  {
    actualWeight: 500,
    dimensions: ethers.utils.keccak256(ethers.utils.toUtf8Bytes('10x10x5')),
    category: ethers.utils.keccak256(ethers.utils.toUtf8Bytes('hardware')),
    declaredCurrency: ethers.utils.parseEther('50')
  },
  {
    actualWeight: 800,
    dimensions: ethers.utils.keccak256(ethers.utils.toUtf8Bytes('15x15x7')),
    category: ethers.utils.keccak256(ethers.utils.toUtf8Bytes('hardware')),
    declaredCurrency: ethers.utils.parseEther('80')
  },
  {
    actualWeight: 150,
    dimensions: ethers.utils.keccak256(ethers.utils.toUtf8Bytes('shirt-size-l')),
    category: ethers.utils.keccak256(ethers.utils.toUtf8Bytes('merchandise')),
    declaredCurrency: ethers.utils.parseEther('15')
  }
];

await itemRegistry.addItemsBatch(itemIds, items);

// Get item details
const owner = campaignOwnerAddress;
const itemId = ethers.utils.keccak256(ethers.utils.toUtf8Bytes('product-v1'));

const item = await itemRegistry.getItem(owner, itemId);
console.log('Weight:', item.actualWeight, 'g');
console.log('Value:', ethers.utils.formatEther(item.declaredCurrency));

// Use items in rewards
const reward = {
  rewardValue: ethers.utils.parseEther('50'),
  isRewardTier: true,
  itemId: [
    ethers.utils.keccak256(ethers.utils.toUtf8Bytes('product-v1'))
  ],
  itemValue: [
    ethers.utils.parseEther('40')
  ],
  itemQuantity: [1]
};

// Add items to registry first
await itemRegistry.addItem(reward.itemId[0], itemDetails);

// Then add reward
await treasury.addRewards([rewardName], [reward]);

// Get items for reward fulfillment
const reward = await treasury.getReward(rewardName);

for (const itemId of reward.itemId) {
  const item = await itemRegistry.getItem(campaignOwner, itemId);
  
  // Log item details for shipping
  console.log('Item:', itemId);
  console.log('Weight:', item.actualWeight, 'g');
  console.log('Dimensions:', ethers.utils.toUtf8String(item.dimensions));
}

// Group items logically
const hardwareItems = [
  'product-v1',
  'product-v2',
  'accessory'
];

const merchandiseItems = [
  't-shirt',
  'sticker',
  'poster'
];

// Register by category
await registerCategoryItems('hardware', hardwareItems);
await registerCategoryItems('merchandise', merchandiseItems);

// Update item values consistently
const items = [
  { id: 'product', value: parseEther('50') },
  { id: 't-shirt', value: parseEther('15') }
];

await itemRegistry.addItemsBatch(
  items.map(i => i.id),
  items.map(i => ({ 
    actualWeight: 0,
    dimensions: ethers.utils.formatBytes32String(''),
    category: ethers.utils.formatBytes32String(''),
    declaredCurrency: i.value
  }))
);