{
  "$schema": "https://metabuilder.dev/schemas/json-script-validation.schema.json",
  "schemaVersion": "2.0.0",
  "package": "advanced-features",
  "description": "Advanced validation functions with custom logic",
  "patterns": {
    "orderNumber": "^ORD-[0-9]{4}-[0-9]{6}$",
    "trackingNumber": "^[A-Z0-9]{10,20}$",
    "currencyCode": "^[A-Z]{3}$",
    "postalCode": "^[0-9]{5}(-[0-9]{4})?$"
  },
  "validators": [
    {
      "id": "validate_order_total",
      "name": "validateOrderTotal",
      "exported": true,
      "description": "Validate that order total matches sum of items",
      "params": [
        {
          "name": "order",
          "type": "Order",
          "required": true
        }
      ],
      "returnType": "ValidationResult",
      "body": [
        {
          "type": "variable",
          "name": "itemsTotal",
          "value": {
            "type": "expression",
            "expression": "order.items.reduce((sum, item) => sum + item.subtotal, 0)"
          }
        },
        {
          "type": "conditional",
          "condition": {
            "type": "comparison",
            "operator": "!==",
            "left": "order.totalAmount",
            "right": "itemsTotal"
          },
          "then": [
            {
              "type": "return",
              "value": {
                "valid": false,
                "errors": [
                  {
                    "field": "totalAmount",
                    "message": "Total amount does not match sum of items",
                    "code": "INVALID_TOTAL"
                  }
                ]
              }
            }
          ]
        },
        {
          "type": "return",
          "value": {
            "valid": true
          }
        }
      ]
    },
    {
      "id": "validate_shipping_address",
      "name": "validateShippingAddress",
      "exported": true,
      "description": "Validate shipping address completeness",
      "params": [
        {
          "name": "address",
          "type": "Address",
          "required": true
        }
      ],
      "returnType": "ValidationResult",
      "body": [
        {
          "type": "variable",
          "name": "errors",
          "value": []
        },
        {
          "type": "conditional",
          "condition": {
            "type": "expression",
            "expression": "!address.street || address.street.trim().length === 0"
          },
          "then": [
            {
              "type": "expression",
              "expression": "errors.push({ field: 'street', message: 'Street is required', code: 'REQUIRED' })"
            }
          ]
        },
        {
          "type": "conditional",
          "condition": {
            "type": "expression",
            "expression": "!address.city || address.city.trim().length === 0"
          },
          "then": [
            {
              "type": "expression",
              "expression": "errors.push({ field: 'city', message: 'City is required', code: 'REQUIRED' })"
            }
          ]
        },
        {
          "type": "conditional",
          "condition": {
            "type": "expression",
            "expression": "!address.postalCode || !/^[0-9]{5}(-[0-9]{4})?$/.test(address.postalCode)"
          },
          "then": [
            {
              "type": "expression",
              "expression": "errors.push({ field: 'postalCode', message: 'Invalid postal code', code: 'INVALID_FORMAT' })"
            }
          ]
        },
        {
          "type": "conditional",
          "condition": {
            "type": "expression",
            "expression": "!address.country || address.country.length !== 2"
          },
          "then": [
            {
              "type": "expression",
              "expression": "errors.push({ field: 'country', message: 'Invalid country code', code: 'INVALID_FORMAT' })"
            }
          ]
        },
        {
          "type": "return",
          "value": {
            "type": "ternary",
            "condition": "errors.length === 0",
            "ifTrue": { "valid": true },
            "ifFalse": { "valid": false, "errors": "errors" }
          }
        }
      ]
    },
    {
      "id": "validate_inventory",
      "name": "validateInventory",
      "exported": true,
      "description": "Validate product inventory availability",
      "async": true,
      "params": [
        {
          "name": "items",
          "type": "OrderItem[]",
          "required": true
        }
      ],
      "returnType": "Promise<ValidationResult>",
      "body": [
        {
          "type": "variable",
          "name": "errors",
          "value": []
        },
        {
          "type": "for",
          "iterator": "item",
          "iterable": "items",
          "body": [
            {
              "type": "variable",
              "name": "stock",
              "value": {
                "type": "await",
                "expression": "inventory.getStock(item.productId)"
              }
            },
            {
              "type": "conditional",
              "condition": {
                "type": "comparison",
                "operator": "<",
                "left": "stock.available",
                "right": "item.quantity"
              },
              "then": [
                {
                  "type": "expression",
                  "expression": "errors.push({ field: `items.${item.productId}`, message: `Insufficient stock. Available: ${stock.available}, Requested: ${item.quantity}`, code: 'INSUFFICIENT_STOCK' })"
                }
              ]
            }
          ]
        },
        {
          "type": "return",
          "value": {
            "type": "ternary",
            "condition": "errors.length === 0",
            "ifTrue": { "valid": true },
            "ifFalse": { "valid": false, "errors": "errors" }
          }
        }
      ]
    },
    {
      "id": "validate_credit_card",
      "name": "validateCreditCard",
      "exported": true,
      "description": "Validate credit card using Luhn algorithm",
      "params": [
        {
          "name": "cardNumber",
          "type": "string",
          "required": true
        }
      ],
      "returnType": "boolean",
      "body": [
        {
          "type": "comment",
          "text": "Remove all non-digit characters"
        },
        {
          "type": "variable",
          "name": "digits",
          "value": {
            "type": "expression",
            "expression": "cardNumber.replace(/\\D/g, '')"
          }
        },
        {
          "type": "conditional",
          "condition": {
            "type": "expression",
            "expression": "digits.length < 13 || digits.length > 19"
          },
          "then": [
            {
              "type": "return",
              "value": false
            }
          ]
        },
        {
          "type": "comment",
          "text": "Luhn algorithm implementation"
        },
        {
          "type": "variable",
          "name": "sum",
          "value": 0
        },
        {
          "type": "variable",
          "name": "isEven",
          "value": false
        },
        {
          "type": "for",
          "iterator": "i",
          "start": {
            "type": "expression",
            "expression": "digits.length - 1"
          },
          "condition": {
            "type": "comparison",
            "operator": ">=",
            "left": "i",
            "right": 0
          },
          "increment": -1,
          "body": [
            {
              "type": "variable",
              "name": "digit",
              "value": {
                "type": "expression",
                "expression": "parseInt(digits[i], 10)"
              }
            },
            {
              "type": "conditional",
              "condition": "isEven",
              "then": [
                {
                  "type": "expression",
                  "expression": "digit *= 2"
                },
                {
                  "type": "conditional",
                  "condition": {
                    "type": "comparison",
                    "operator": ">",
                    "left": "digit",
                    "right": 9
                  },
                  "then": [
                    {
                      "type": "expression",
                      "expression": "digit -= 9"
                    }
                  ]
                }
              ]
            },
            {
              "type": "expression",
              "expression": "sum += digit"
            },
            {
              "type": "expression",
              "expression": "isEven = !isEven"
            }
          ]
        },
        {
          "type": "return",
          "value": {
            "type": "expression",
            "expression": "sum % 10 === 0"
          }
        }
      ]
    }
  ],
  "exports": {
    "functions": [
      "validateOrderTotal",
      "validateShippingAddress",
      "validateInventory",
      "validateCreditCard"
    ],
    "patterns": [
      "orderNumber",
      "trackingNumber",
      "currencyCode",
      "postalCode"
    ]
  }
}