/* eslint-disable quotes */

/** The Standard Schema interface. */
export interface StandardSchemaV1<Input = unknown, Output = Input> {
	/** The Standard Schema properties. */
	readonly "~standard": StandardSchemaV1.Props<Input, Output>
}

export declare namespace StandardSchemaV1 {
	/** The Standard Schema properties interface. */
	export interface Props<Input = unknown, Output = Input> {
		/** The version number of the standard. */
		readonly version: 1
		/** The vendor name of the schema library. */
		readonly vendor: string
		/** Validates unknown input values. */
		readonly validate: (
			value: unknown,
		) => Promise<Result<Output>> | Result<Output>
		/** Inferred types associated with the schema. */
		readonly types?: Types<Input, Output> | undefined
	}

	/** The result interface of the validate function. */
	export type Result<Output> = FailureResult | SuccessResult<Output>

	/** The result interface if validation succeeds. */
	export interface SuccessResult<Output> {
		/** The typed output value. */
		readonly value: Output
		/** The non-existent issues. */
		readonly issues?: undefined
	}

	/** The result interface if validation fails. */
	export interface FailureResult {
		/** The issues of failed validation. */
		readonly issues: ReadonlyArray<Issue>
	}

	/** The issue interface of the failure output. */
	export interface Issue {
		/** The error message of the issue. */
		readonly message: string
		/** The path of the issue, if any. */
		readonly path?: ReadonlyArray<PathSegment | PropertyKey> | undefined
	}

	/** The path segment interface of the issue. */
	export interface PathSegment {
		/** The key representing a path segment. */
		readonly key: PropertyKey
	}

	/** The Standard Schema types interface. */
	export interface Types<Input = unknown, Output = Input> {
		/** The input type of the schema. */
		readonly input: Input
		/** The output type of the schema. */
		readonly output: Output
	}

	/** Infers the input type of a Standard Schema. */
	export type InferInput<Schema extends StandardSchemaV1> = NonNullable<
		Schema["~standard"]["types"]
	>["input"]

	/** Infers the output type of a Standard Schema. */
	export type InferOutput<Schema extends StandardSchemaV1> = NonNullable<
		Schema["~standard"]["types"]
	>["output"]
}