{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "$id": "https://caoergou.github.io/windows-xp/schema/xpspack-manifest.json",
  "title": "XpspackManifestV1",
  "type": "object",
  "additionalProperties": false,
  "required": ["formatVersion", "packId", "rootChunk", "chunks", "assets", "signature"],
  "properties": {
    "formatVersion": { "const": 1 },
    "packId": { "type": "string", "minLength": 1 },
    "rootChunk": { "type": "string", "minLength": 1 },
    "chunks": {
      "type": "array",
      "minItems": 1,
      "items": { "$ref": "#/definitions/chunk" }
    },
    "assets": {
      "type": "array",
      "items": { "$ref": "#/definitions/asset" }
    },
    "signature": {
      "oneOf": [
        { "type": "null" },
        {
          "type": "object",
          "additionalProperties": false,
          "required": ["algorithm", "keyId", "path"],
          "properties": {
            "algorithm": { "const": "Ed25519" },
            "keyId": { "type": "string", "minLength": 1 },
            "path": { "const": "manifest.sig" }
          }
        }
      ]
    }
  },
  "definitions": {
    "sha256": {
      "type": "string",
      "pattern": "^[0-9a-f]{64}$"
    },
    "compression": {
      "enum": ["none", "gzip", "brotli"]
    },
    "encryption": {
      "oneOf": [
        { "type": "null" },
        {
          "type": "object",
          "additionalProperties": false,
          "required": ["algorithm", "keyId", "nonce"],
          "properties": {
            "algorithm": { "const": "AES-256-GCM" },
            "keyId": { "type": "string", "minLength": 1 },
            "nonce": {
              "type": "string",
              "pattern": "^[A-Za-z0-9_-]{16}$",
              "description": "A 12-byte nonce encoded as unpadded base64url."
            }
          }
        }
      ]
    },
    "chunk": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "id",
        "path",
        "sha256",
        "storedBytes",
        "uncompressedBytes",
        "compression",
        "encryption"
      ],
      "properties": {
        "id": { "type": "string", "minLength": 1 },
        "path": {
          "type": "string",
          "minLength": 1,
          "pattern": "^chunks/[A-Za-z0-9._/-]+$"
        },
        "sha256": { "$ref": "#/definitions/sha256" },
        "storedBytes": { "type": "integer", "minimum": 0, "maximum": 9007199254740991 },
        "uncompressedBytes": {
          "type": "integer",
          "minimum": 0,
          "maximum": 9007199254740991
        },
        "compression": { "$ref": "#/definitions/compression" },
        "encryption": { "$ref": "#/definitions/encryption" }
      }
    },
    "asset": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "id",
        "path",
        "sha256",
        "storedBytes",
        "uncompressedBytes",
        "compression",
        "encryption",
        "mediaType"
      ],
      "properties": {
        "id": { "type": "string", "minLength": 1 },
        "path": { "type": "string", "pattern": "^assets/[A-Za-z0-9._/-]+$" },
        "sha256": { "$ref": "#/definitions/sha256" },
        "storedBytes": { "type": "integer", "minimum": 0, "maximum": 9007199254740991 },
        "uncompressedBytes": {
          "type": "integer",
          "minimum": 0,
          "maximum": 9007199254740991
        },
        "compression": { "$ref": "#/definitions/compression" },
        "encryption": { "$ref": "#/definitions/encryption" },
        "mediaType": { "type": "string", "minLength": 1 }
      }
    }
  }
}