/**
 * A plain object representing a single JSON Schema node.
 *
 * **When to use**
 *
 * Use to represent an arbitrary JSON Schema object regardless of dialect.
 *
 * **Details**
 *
 * This is an open record type (`[x: string]: unknown`) so it can hold any JSON
 * Schema keyword. Most functions in this module accept or return this type.
 *
 * @category models
 * @since 4.0.0
 */
export interface JsonSchema {
    [x: string]: unknown;
}
/**
 * The set of JSON Schema dialects supported by this module.
 *
 * **When to use**
 *
 * Use as the dialect marker for `JsonSchema` documents when parsing,
 * converting, or emitting schemas across the supported formats.
 *
 * **Details**
 *
 * Supported values are `"draft-07"` for JSON Schema Draft-07,
 * `"draft-2020-12"` for JSON Schema Draft 2020-12 and the canonical internal
 * form, `"openapi-3.1"` for OpenAPI 3.1, and `"openapi-3.0"` for OpenAPI 3.0.
 *
 * @see {@link Document} for a single root schema tagged with a dialect
 * @see {@link MultiDocument} for multiple root schemas tagged with a dialect
 *
 * @category models
 * @since 4.0.0
 */
export type Dialect = "draft-07" | "draft-2020-12" | "openapi-3.1" | "openapi-3.0";
/**
 * The JSON Schema primitive type names.
 *
 * **When to use**
 *
 * Use to restrict a JSON Schema `type` keyword to the supported primitive names.
 *
 * @category models
 * @since 4.0.0
 */
export type Type = "string" | "number" | "boolean" | "array" | "object" | "null" | "integer";
/**
 * A record of named JSON Schema definitions, keyed by definition name.
 *
 * **When to use**
 *
 * Use as the shared lookup table for named JSON Schema nodes that are
 * referenced from JSON Schema documents.
 *
 * **Details**
 *
 * The map is dialect-neutral. Conversion APIs emit it as `$defs`,
 * `definitions`, or `components.schemas` depending on the target format.
 *
 * @see {@link Document} for a single root schema with definitions
 * @see {@link MultiDocument} for multiple root schemas sharing definitions
 * @see {@link resolve$ref} for resolving a `$ref` against definitions
 *
 * @category models
 * @since 4.0.0
 */
export interface Definitions extends Record<string, JsonSchema> {
}
/**
 * A structured container for a single JSON Schema and its associated
 * definitions.
 *
 * **When to use**
 *
 * Use when you need to carry a root schema together with its shared
 * definitions, or when converting between dialects with the `from*` and `to*`
 * functions.
 *
 * **Details**
 *
 * The `schema` field holds the root schema *without* the definitions
 * collection. Root definitions are stored separately in `definitions` and
 * referenced via `#/$defs/<name>` for Draft-2020-12, `#/definitions/<name>`
 * for Draft-07, and `#/components/schemas/<name>` for OpenAPI 3.1 and
 * OpenAPI 3.0.
 *
 * **Example** (Inspecting a parsed document)
 *
 * ```ts
 * import { JsonSchema } from "effect"
 *
 * const raw: JsonSchema.JsonSchema = {
 *   type: "string",
 *   $defs: { Trimmed: { type: "string", minLength: 1 } }
 * }
 *
 * const doc = JsonSchema.fromSchemaDraft2020_12(raw)
 *
 * console.log(doc.dialect)     // "draft-2020-12"
 * console.log(doc.schema)      // { type: "string" }
 * console.log(doc.definitions) // { Trimmed: { type: "string", minLength: 1 } }
 * ```
 *
 * @see {@link MultiDocument}
 * @see {@link fromSchemaDraft2020_12}
 * @category models
 * @since 4.0.0
 */
export interface Document<D extends Dialect> {
    readonly dialect: D;
    readonly schema: JsonSchema;
    readonly definitions: Definitions;
}
/**
 * Like {@link Document}, but carries multiple root schemas that share a
 * single definitions pool.
 *
 * **When to use**
 *
 * Use when generating several schemas, such as a request body
 * and a response body, that reference the same set of definitions.
 *
 * **Details**
 *
 * The `schemas` tuple is non-empty and contains at least one element.
 *
 * @see {@link Document}
 * @see {@link toMultiDocumentOpenApi3_1}
 * @category models
 * @since 4.0.0
 */
export interface MultiDocument<D extends Dialect> {
    readonly dialect: D;
    readonly schemas: readonly [JsonSchema, ...Array<JsonSchema>];
    readonly definitions: Definitions;
}
/**
 * Represents the `$schema` meta-schema URI for JSON Schema Draft-07.
 *
 * **When to use**
 *
 * Use when constructing a Draft-07 JSON Schema document and you need a stable
 * value for the root `$schema` field.
 *
 * **Details**
 *
 * The exported value is the literal string
 * `http://json-schema.org/draft-07/schema`.
 *
 * @see {@link META_SCHEMA_URI_DRAFT_2020_12} for the Draft 2020-12 `$schema` URI
 *
 * @category constants
 * @since 4.0.0
 */
export declare const META_SCHEMA_URI_DRAFT_07 = "http://json-schema.org/draft-07/schema";
/**
 * Represents the `$schema` meta-schema URI for JSON Schema Draft 2020-12.
 *
 * **When to use**
 *
 * Use to populate the `$schema` field when emitting a JSON Schema document that
 * should declare JSON Schema Draft 2020-12.
 *
 * **Details**
 *
 * The exported value is the literal string
 * `https://json-schema.org/draft/2020-12/schema`.
 *
 * @see {@link META_SCHEMA_URI_DRAFT_07} for the Draft-07 `$schema` URI
 *
 * @category constants
 * @since 4.0.0
 */
export declare const META_SCHEMA_URI_DRAFT_2020_12 = "https://json-schema.org/draft/2020-12/schema";
/**
 * Parses a raw Draft-07 JSON Schema into a `Document<"draft-2020-12">`.
 *
 * **When to use**
 *
 * Use when you have a JSON Schema that follows Draft-07 conventions and
 * need the canonical Draft-2020-12 document representation.
 *
 * **Details**
 *
 * This converts Draft-07 tuple syntax (`items` as array plus
 * `additionalItems`) to Draft-2020-12 form (`prefixItems` plus `items`),
 * rewrites `#/definitions/...` refs to `#/$defs/...`, and extracts root-level
 * `definitions` into the `definitions` field.
 *
 * **Gotchas**
 *
 * Unsupported keywords, such as `if`/`then`/`else` and `$id`, are dropped.
 *
 * **Example** (Parsing a Draft-07 schema)
 *
 * ```ts
 * import { JsonSchema } from "effect"
 *
 * const raw: JsonSchema.JsonSchema = {
 *   type: "object",
 *   properties: {
 *     tags: {
 *       type: "array",
 *       items: { type: "string" }
 *     }
 *   }
 * }
 *
 * const doc = JsonSchema.fromSchemaDraft07(raw)
 * console.log(doc.dialect) // "draft-2020-12"
 * console.log(doc.schema.properties) // { tags: { type: "array", items: { type: "string" } } }
 * ```
 *
 * @see {@link fromSchemaDraft2020_12}
 * @see {@link fromSchemaOpenApi3_0}
 * @see {@link toDocumentDraft07}
 * @category decoding
 * @since 4.0.0
 */
export declare function fromSchemaDraft07(js: JsonSchema): Document<"draft-2020-12">;
/**
 * Parses a raw Draft-2020-12 JSON Schema into a `Document<"draft-2020-12">`.
 *
 * **When to use**
 *
 * Use when you already have a schema in Draft-2020-12 format.
 *
 * **Details**
 *
 * This separates `$defs` from the root schema into the `definitions` field.
 * Unlike {@link fromSchemaDraft07}, this performs no keyword rewriting.
 *
 * **Example** (Parsing a Draft-2020-12 schema)
 *
 * ```ts
 * import { JsonSchema } from "effect"
 *
 * const raw: JsonSchema.JsonSchema = {
 *   type: "number",
 *   minimum: 0,
 *   $defs: { PositiveInt: { type: "integer", minimum: 1 } }
 * }
 *
 * const doc = JsonSchema.fromSchemaDraft2020_12(raw)
 * console.log(doc.schema)      // { type: "number", minimum: 0 }
 * console.log(doc.definitions) // { PositiveInt: { type: "integer", minimum: 1 } }
 * ```
 *
 * @see {@link fromSchemaDraft07}
 * @see {@link fromSchemaOpenApi3_1}
 * @category decoding
 * @since 4.0.0
 */
export declare function fromSchemaDraft2020_12(js: JsonSchema): Document<"draft-2020-12">;
/**
 * Parses a raw OpenAPI 3.1 JSON Schema into a `Document<"draft-2020-12">`.
 *
 * **When to use**
 *
 * Use when consuming schemas from an OpenAPI 3.1 specification.
 *
 * **Details**
 *
 * This rewrites `#/components/schemas/...` refs to `#/$defs/...`, then delegates
 * to {@link fromSchemaDraft2020_12}.
 *
 * **Example** (Parsing an OpenAPI 3.1 schema)
 *
 * ```ts
 * import { JsonSchema } from "effect"
 *
 * const raw: JsonSchema.JsonSchema = {
 *   type: "object",
 *   properties: {
 *     user: { $ref: "#/components/schemas/User" }
 *   }
 * }
 *
 * const doc = JsonSchema.fromSchemaOpenApi3_1(raw)
 * // $ref is rewritten to Draft-2020-12 form
 * console.log(doc.schema.properties) // { user: { $ref: "#/$defs/User" } }
 * ```
 *
 * @see {@link fromSchemaOpenApi3_0}
 * @see {@link toMultiDocumentOpenApi3_1}
 * @category decoding
 * @since 4.0.0
 */
export declare function fromSchemaOpenApi3_1(js: JsonSchema): Document<"draft-2020-12">;
/**
 * Parses a raw OpenAPI 3.0 JSON Schema into a `Document<"draft-2020-12">`.
 *
 * **When to use**
 *
 * Use when consuming schemas from an OpenAPI 3.0 specification.
 *
 * **Details**
 *
 * This handles OpenAPI 3.0 extensions, including `nullable`, singular
 * `example`, and boolean `exclusiveMinimum` or `exclusiveMaximum`. It
 * normalizes the schema to Draft-07 first, then converts to Draft-2020-12 via
 * {@link fromSchemaDraft07}.
 *
 * **Example** (Parsing an OpenAPI 3.0 nullable schema)
 *
 * ```ts
 * import { JsonSchema } from "effect"
 *
 * const raw: JsonSchema.JsonSchema = {
 *   type: "string",
 *   nullable: true
 * }
 *
 * const doc = JsonSchema.fromSchemaOpenApi3_0(raw)
 * // nullable is expanded into a type array
 * console.log(doc.schema.type) // ["string", "null"]
 * ```
 *
 * @see {@link fromSchemaOpenApi3_1}
 * @see {@link fromSchemaDraft07}
 * @category decoding
 * @since 4.0.0
 */
export declare function fromSchemaOpenApi3_0(schema: JsonSchema): Document<"draft-2020-12">;
/**
 * Converts a `Document<"draft-2020-12">` to a `Document<"draft-07">`.
 *
 * **When to use**
 *
 * Use when you need to output a schema in Draft-07 format.
 *
 * **Details**
 *
 * This rewrites `#/$defs/...` refs to `#/definitions/...`, converts
 * Draft-2020-12 tuple syntax (`prefixItems` plus `items`) to Draft-07 form
 * (`items` as array plus `additionalItems`), and converts both the root schema
 * and all definitions.
 *
 * **Gotchas**
 *
 * Unsupported Draft-2020-12 keywords are dropped.
 *
 * **Example** (Converting to Draft-07)
 *
 * ```ts
 * import { JsonSchema } from "effect"
 *
 * const doc = JsonSchema.fromSchemaDraft2020_12({
 *   type: "array",
 *   prefixItems: [{ type: "string" }, { type: "number" }],
 *   items: { type: "boolean" }
 * })
 *
 * const draft07 = JsonSchema.toDocumentDraft07(doc)
 * console.log(draft07.dialect)                // "draft-07"
 * console.log(draft07.schema.items)           // [{ type: "string" }, { type: "number" }]
 * console.log(draft07.schema.additionalItems) // { type: "boolean" }
 * ```
 *
 * @see {@link fromSchemaDraft07}
 * @see {@link toMultiDocumentOpenApi3_1}
 * @category encoding
 * @since 4.0.0
 */
export declare function toDocumentDraft07(document: Document<"draft-2020-12">): Document<"draft-07">;
/**
 * Converts a `MultiDocument<"draft-2020-12">` to a
 * `MultiDocument<"openapi-3.1">`.
 *
 * **When to use**
 *
 * Use when generating an OpenAPI 3.1 specification from internal schemas.
 *
 * **Details**
 *
 * This rewrites `#/$defs/...` refs to `#/components/schemas/...`, sanitizes
 * definition keys to match the OpenAPI component key pattern
 * (`^[a-zA-Z0-9.\-_]+$`) by replacing invalid characters with `_`, updates all
 * `$ref` pointers to use the sanitized keys, and converts all schemas and
 * definitions in the multi-document.
 *
 * **Example** (Converting to OpenAPI 3.1)
 *
 * ```ts
 * import { JsonSchema } from "effect"
 *
 * const multi: JsonSchema.MultiDocument<"draft-2020-12"> = {
 *   dialect: "draft-2020-12",
 *   schemas: [{ $ref: "#/$defs/User" }],
 *   definitions: {
 *     User: { type: "object", properties: { name: { type: "string" } } }
 *   }
 * }
 *
 * const openapi = JsonSchema.toMultiDocumentOpenApi3_1(multi)
 * console.log(openapi.dialect) // "openapi-3.1"
 * console.log(openapi.schemas[0]) // { $ref: "#/components/schemas/User" }
 * ```
 *
 * @see {@link toDocumentDraft07}
 * @see {@link MultiDocument}
 * @category encoding
 * @since 4.0.0
 */
export declare function toMultiDocumentOpenApi3_1(multiDocument: MultiDocument<"draft-2020-12">): MultiDocument<"openapi-3.1">;
/**
 * Resolves a `$ref` string by looking up the last path segment in a
 * definitions map.
 *
 * **When to use**
 *
 * Use when you need to dereference a `$ref` pointer to get the actual
 * schema it points to.
 *
 * **Details**
 *
 * This only resolves the final segment of the ref path, such as `"User"` from
 * `"#/$defs/User"`. It returns `undefined` if the definition is not found.
 *
 * **Gotchas**
 *
 * This function does not follow arbitrary JSON Pointer paths.
 *
 * **Example** (Resolving a $ref)
 *
 * ```ts
 * import { JsonSchema } from "effect"
 *
 * const definitions: JsonSchema.Definitions = {
 *   User: { type: "object", properties: { name: { type: "string" } } }
 * }
 *
 * const result = JsonSchema.resolve$ref("#/$defs/User", definitions)
 * console.log(result) // { type: "object", properties: { name: { type: "string" } } }
 *
 * const missing = JsonSchema.resolve$ref("#/$defs/Unknown", definitions)
 * console.log(missing) // undefined
 * ```
 *
 * @see {@link resolveTopLevel$ref}
 * @see {@link Definitions}
 * @category getters
 * @since 4.0.0
 */
export declare function resolve$ref($ref: string, definitions: Definitions): JsonSchema | undefined;
/**
 * Resolves a document whose root schema is a top-level `$ref`.
 *
 * **When to use**
 *
 * Use to dereference a top-level `$ref` before inspecting the root
 * schema's properties directly.
 *
 * **Details**
 *
 * This returns the same object if no change is needed, or a shallow copy with
 * the resolved schema.
 *
 * **Example** (Resolving a top-level $ref)
 *
 * ```ts
 * import { JsonSchema } from "effect"
 *
 * const doc: JsonSchema.Document<"draft-2020-12"> = {
 *   dialect: "draft-2020-12",
 *   schema: { $ref: "#/$defs/User" },
 *   definitions: {
 *     User: { type: "object", properties: { name: { type: "string" } } }
 *   }
 * }
 *
 * const resolved = JsonSchema.resolveTopLevel$ref(doc)
 * console.log(resolved.schema) // { type: "object", properties: { name: { type: "string" } } }
 * ```
 *
 * @see {@link resolve$ref}
 * @see {@link Document}
 * @category transforming
 * @since 4.0.0
 */
export declare function resolveTopLevel$ref(document: Document<"draft-2020-12">): Document<"draft-2020-12">;
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